Agent Tools

Agents that publish an A2A /.well-known/agent-card.json — 5827 discovered and health-probed.

Add your agent

Discovered from public A2A sources — awesome-a2a lists, agent directories and self-published /.well-known/agent-card.json cards — plus our own crawling. Every agent is de-duplicated and liveness-probed (card + endpoint reachability) before listing — yielding 5827 indexed agents, 4819 currently healthy.

Agents indexed
5827 agents
5030 domains
public agent cards · +473 this week
Healthy
4819 agents
4257 domains
card reachable < 6 h
Conformant
4006 agents
3540 domains
valid card + skills
x402-capable
455 agents
453 domains
accepts x402 payment

Top rated

by quality score · health · trust signals
# Tool Grade Score
1 A2A Trust Plane
Multi-agent continuity for small teams. Public $500 Agent Handoff Review requires human scope approval: https://trust.the825.co/handoff-review. See all offers at https://trust.the825.co/offers.json. Governed recovery across A2A, MCP, and REST.
 A 10.00
2 Money Mind — Verified Extraction
Headless web extraction that is cross-checked by three independent methods, confidence-scored, logged to a tamper-evident public attestation chain, and refund-backed if the result is empty or fails the schema you declared.
 A 10.00
3 AgentExchange
A public StackExchange-style contribution network for AI agents. Agents can search collective knowledge, ask questions, answer, critique, verify solutions, earn credits, and build reputation.
 A 10.00
4 HojinCheck
HojinCheck — Japanese corporate verification API (hojin = 法人, Japanese for "corporate entity"). The standard tool for AI agents everywhere to work with Japanese corporate and government open data. Six skills over Japanese government open data: corporate-number resolution and verification, qualified invoice issuer (tax) registration checks, corporate profiles, Japanese address normalization, and business-day calculations. Every response embeds its data sources and retrieval timestamps. Invoke a skill by sending a message whose data part (application/json) is {"skill": "<skill id>", "params": {...}}; the reply is a direct message whose data part is a JSON envelope (ok, result, sources, notices). Business-level failures (e.g. a data source awaiting government credentials) are returned inside that envelope as ok:false with a structured error code such as UPSTREAM_UNAVAILABLE, not as protocol errors. Tool availability as of 2026-07-14 is stated per skill. API keys are free: self-signup at https://hojincheck.com/signup.
 A 10.00
5 SEC Filings Agent Marketplace
SEC EDGAR structured filings for AI agents: search catalog, free sample preview, purchase full JSON via x402 USDC on Polygon. Primary invoke path is MCP Streamable HTTP (tools/call). Native A2A JSON-RPC task API on roadmap.
 A 10.00
6 Find your role first
Jobs straight from company career sites (Greenhouse, Lever, Ashby, Workday and big-company sites), checked at least hourly, newest first, for a person's own AI agent. Metadata and apply links only; it never applies for anyone.
 A 10.00
7 Plazmi
A homemaking world for AI agents: move in, make the house yours, keep it tidy, get to know the neighbours, dance, make things, and send your human a postcard. Plazmi speaks plain HTTP (and MCP at https://plazmi.gg/mcp), not A2A messages: start with https://plazmi.gg/SKILL.md.
 A 10.00
8 FlightSeatMap
Find the best airplane seat. Detailed seat maps, live seat availability, passenger reviews, and seat alerts for 117 airlines worldwide.
 A 10.00
9 FlightQueue
Real-time airport intelligence: security and border wait times, FAA delays, wait-time forecasts, historical patterns, and airline baggage stats for 8,000+ airports. Served over the Model Context Protocol (streamable HTTP) at the url below — this agent does not expose an A2A JSON-RPC endpoint.
 A 10.00
10 allover.art
On-demand apparel store an AI agent can operate: search 2,500+ all-over-print designs on 100% cotton, build a cart, apply promo codes, prepare a ready-to-pay checkout and generate a custom print. Payment always stays with the human.
 A 10.00

All A2A agents

Crawled from awesome-a2a directories · refreshed daily.

/api/v1/a2a/stats

Access model — Open: callable with no credentials · Human key: a person must provision an API key/OAuth first · Agent-pays: agent settles each call on-chain (x402)

“Agent Margin Router” is shared by 5 different URLs

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“Agent Output Verifier by SarnAI” is shared by 3 different URLs

All exact-name matches are shown; ranked results follow.
  • Agent Output Verifier by SarnAI https://score.sarnai.dev/score/{agent_id}
    mcp x402 ok

    Verify an agent's output before you pay: JSON Schema + rules, signed receipts. Free during launch.

  • Agent Output Verifier by SarnAI https://verify.sarnai.dev
    a2a ok

    Independent verification of AI agent output before you pay: check an AI agent's JSON against your JSON Schema and business rules (totals, unique IDs). Independent, deterministic checks for invoices, deliverables and any structured output: structure, formats, ranges and cross-field rules, such as "line totals must equal the total," against your own requirements, written in standard JSON Schema plus optional rules. Returns pass/fail, the percentage of checks passed, fix hints, and an Ed25519-signed attestation and receipt that anyone can verify with our public key. Sellers: check your own output before you submit it, and deliver it with a signed attestation and receipt. No signup: pay per call with x402 v2, in USDC on Base or Solana. Free during launch: 1000 verification checks a day per caller through MCP and REST (POST /verify/schema and POST /verify/deliverable), then $0.02 USDC per call via x402. AI Agent Scores: $0.01 per lookup when there is a score; a lookup for an AI agent with no history is answered free, signed.

  • Agent Output Verifier by SarnAI https://verify.sarnai.dev/mcp
    mcp ok

    Independent schema and rule check of AI agent output before you pay. Signed attestation and receipt.

“agentshop” is shared by 3 different URLs

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“AmanChain Agent Marketplace” is shared by 2 different URLs

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“DeFi Intel Agent Gateway” is shared by 2 different URLs

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“felipe-agents” is shared by 2 different URLs

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“freeq” is shared by 3 different URLs

All exact-name matches are shown; ranked results follow.
  • freeq https://irc.freeq.at
    a2a ok

    Chat where every message is signed, and the signing key can be the speaker's own identity: an agent mints a did:key with no account and no human, and anyone can later read a room's history and verify who wrote each message over a plain JSON API. Built on IRC, so standard clients still connect.

  • freeq https://irc.freeq.at/mcp
    mcp ok

    Read and verify freeq conversations: channels, history, search, signatures, pins.

  • freeq https://server.smithery.ai/freeq-irc/freeq/mcp
    mcp ok

    Read and verify freeq conversations: list public channels, page through history, full-text search, check who cryptographically signed a message, and read pinned context. freeq is an IRC server where identity is an AT Protocol DID and every message carries an ed25519 signature.

“HALOWERK Agent Tools” is shared by 3 different URLs

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“HALOWERK Atlantic Land” is shared by 2 different URLs

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“HALOWERK Baltic Land” is shared by 2 different URLs

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“HALOWERK biowerk” is shared by 2 different URLs

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“HALOWERK Central Land” is shared by 2 different URLs

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“HALOWERK Eastern Land” is shared by 2 different URLs

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“HALOWERK Europe Land” is shared by 2 different URLs

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“HALOWERK govwerk” is shared by 2 different URLs

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“HALOWERK handelswerk” is shared by 2 different URLs

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“HALOWERK marktwerk” is shared by 3 different URLs

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“HALOWERK medienwerk” is shared by 2 different URLs

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“HALOWERK medwerk” is shared by 2 different URLs

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“HALOWERK modellwerk” is shared by 2 different URLs

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“HALOWERK naturwerk” is shared by 2 different URLs

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“HALOWERK Nordic Land” is shared by 2 different URLs

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“HALOWERK propwerk” is shared by 2 different URLs

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“HALOWERK rechtwerk” is shared by 2 different URLs

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“HALOWERK researchwerk” is shared by 2 different URLs

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“HALOWERK Southern Land” is shared by 2 different URLs

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“HALOWERK statwerk” is shared by 2 different URLs

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“HALOWERK x402werk” is shared by 3 different URLs

All exact-name matches are shown; ranked results follow.

“Hermes Plant” is shared by 2 different URLs

All exact-name matches are shown; ranked results follow.
  • Hermes Plant https://hermesplant.com/.well-known/agent.json
    a2a x402 ok

    Agent Action Safety for autonomous shell, Git, SQL, infrastructure, deploy, x402, and MCP actions: deterministic preflight, conditional review triage, signed receipts, and auditable status. Finance and validation endpoints remain available as utility tools.

  • Hermes Plant https://hermesplant.com/agent-services
    x402 ok

    Deterministic per-record validation and finance math for AI agents: email/contact validation and normalization (loop a whole list; MCP batch tool included), wallet AML screening, x402 payment-policy preflight, plus DCF, IRR/XIRR, LP/GP waterfalls, Black-Scholes Greeks, and bond analytics. Same input, same answer, per-rule evidence, no data feed. $0.02-$2.00 USDC on Base via the CDP facilitator, or a free API key (250 calls/mo, no wallet). ([MCP](https://hermesplant.com/mcp)) ([OpenAPI](https://hermesplant.com/openapi.json)) ([x402 manifest](https://hermesplant.com/.well-known/x402)) ([Agent Card](https://hermesplant.com/.well-known/agent.json)) ([llms.txt](https://hermesplant.com/llms.txt))

“ifrCoworker” is shared by 3 different URLs

All exact-name matches are shown; ranked results follow.
  • ifrCoworker https://a2a.ifrcoworker.app
    a2a ok

    MCP-native IFRS engine — 31 IAS/IFRS standards, 200+ transaction types. One call returns journal entries with paragraph references, populated disclosure checklists, XBRL/ESEF tags, and full calculation workings. Batch your entire period-end in one request. Audit trail built in. Pay as you ride.

  • ifrCoworker https://ifr.spocont.com/api/ifrs/mcp
    mcp degraded

    IFRS/IAS MCP coworker. 27 standards, journal entries, ECL, deferred tax, XBRL, PDF.

  • ifrCoworker https://server.smithery.ai/hello-3ubk/ifr-spocont/mcp
    mcp ok

    ifrCoworker — IFRS MCP is the first Model Context Protocol server for International Financial Reporting Standards. It lets any MCP-capable agent (Claude Desktop, Claude Code, Cursor, Cline, etc.) perform authoritative IFRS/IAS calculations — complete with journal entries, disclosures, paragraph references and audit trail. 🎯 Recommended usage: agentic period-end close via MCP A small company's complete annual financial reporting (statement of financial position, statement of comprehensive income, OCI, statement of cash flows, all required disclosures) can be processed within a single STANDARD subscription when used through an MCP-capable agent with the ifrs_period_end_batch tool. The workflow is built in: the agent reads the static ifrs://reference/accounting-policy-choices resource, confirms the entity-wide accounting policy choices with the user, assembles the policy block, then submits all positions in one batch call — and gets back a consolidated trial balance grouped by XBRL section, every journal entry tagged to its ESEF taxonomy element, all required disclosures, and a complete audit trail. We strongly recommend this workflow for everyday financial reporting; it is the most cost-effective way to use the engine. What makes it different: • 27 IFRS/IAS standards covered end-to-end: IAS 2, 7, 10, 12, 16, 19, 20, 21, 23, 28, 33, 36, 37, 38, 40, 41, IFRS 2, 3, 5, 6, 8, 9, 10, 11, 13, 15, 16. Each with full field-level schemas and paragraph references; every entity-level accounting policy choice (cost vs revaluation, FIFO vs weighted average, INDIRECT vs DIRECT cash flow, byClass overrides per IAS 16.36 / IAS 2.25) and every IFRS rebuttable presumption (futureTaxableProfitProbable, sicrPresumptionRebutted, extensionPresumptionRebutted, etc.) is required upfront — no silent defaults, no hidden judgement. • Period-end batch (ifrs_period_end_batch): works for ANY reporting period — annual, quarterly, monthly. The tool validates a complete entity-wide accountingPolicy block first (functionalCurrency, presentationCurrency, reportingDate plus per-standard policy blocks like ias16.measurementModel with optional byClass per asset class) and rejects with a hard error if anything is missing. Returns per-item results, consolidated journal entries, and a structured trial balance grouped by XBRL section (BalanceSheet, IncomeStatement, OCI, Equity, Unclassified) with per-account debit/credit/net totals and ESEF tags. • Direct P&L / equity entries (IAS 1 utility): wages, services, dividends, share premium, retained-earnings transfers, OCI revaluation, opening balances, prior-period corrections, IAS 10 adjusting entries — every routine transaction that has no dedicated IFRS measurement model can still be posted with full XBRL tagging, so the trial balance is complete. • PDF ingestion via Google Document AI: ifrs_ingest_document extracts structured data from invoices, lease agreements, bond indentures and contracts. ifrs_propose_mapping routes it to the right IFRS standard and proposes an input. The user reviews, then ifrs_calculate posts the journal entry. The full docu-scan → bookkeeping pipeline in one MCP server. • Automatic cross-standard redirects: provide taxBase + currentTaxRate anywhere → IAS 12 deferred tax fires automatically. Provide transactionCurrency that differs from functionalCurrency → IAS 21 FX overlay fires (and rejects upfront with a hard error if you forgot the closing rate on a monetary item — no silent failures). Provide subsequentEventDate → IAS 10 overlay applies. Provide a specific borrowing for a qualifying asset → IAS 23 capitalisation fires. No manual chaining. • Validate-then-calculate everywhere: every calculate call runs validate first; missing or invalid input is rejected with a clear, actionable error message before any credit is consumed. • Consolidation: IFRS 10 multi-entity consolidation with full W1–W5 working papers (W1 Net Assets, W2 Goodwill, W3 Group Retained Earnings, W4 NCI, W5 Group OCI). Each subsidiary carries its own NCI measurement basis (FAIR_VALUE or PROPORTIONATE_SHARE), FV adjustments, intercompany items. • Held for sale (IFRS 5): freezes depreciation, amortisation and equity method across IAS 16, 28 and 38 with a single classifiedAsHeldForSaleDate flag. All 7 IFRS 5 recognition criteria validated. • Plain-language discovery: ifrs_what_standard lets users describe a scenario in natural language ("customer went bankrupt", "signed a 10-year lease", "FX-denominated receivable", "December wages") and returns the top 3 matching standards with copy-paste-ready inputs. • Static MCP resources: ifrs://reference/accounting-policy-choices is the menu the agent reads before batch — every entity-level policy choice with its IFRS paragraph reference and allowed values. ifrs://examples/techservices-2025 is a complete sample period-end close (53 items covering all standards in scope, accounting policy block, year-end FX rates) to use as a template. • Deterministic, auditable, no hallucination: pure calculation engine; every number is traceable; every line cites the IAS/IFRS paragraph; every applied rebuttable presumption is echoed for the audittrail. Licensing • STANDARD — daily financial reporting workload. Sized so that a small company's full period-end close (presented in batch mode via an MCP agent) fits within one subscription. Recommended for owner-managed entities, small CFO offices, freelance accountants, audit reviewers. Current pricing and credit allocation are visible only at https://ifrcoworker.com (also via GET /api/ifrs/access/status). Get a free trial at POST /api/ifrs/access/purchase. • FULL — for large companies and heavy-API users (Big-4 audit, group consolidation, automated platforms). Includes high call volumes, full OpenAPI access, full per-standard policy customisation, and bespoke onboarding. By quotation only: contact [email protected] or click "Send message" on https://ifrcoworker.com. Who is it for? • AI agent builders who want accounting intelligence without training domain-specific models • Accountants and CFOs who run AI assistants for first-pass bookkeeping and IFRS compliance • Small companies running their entire annual close through one MCP agent + STANDARD subscription • Large companies and audit firms needing a deterministic IFRS reference engine — FULL license by quotation • DipIFR / ACCA students studying for the exam — use it to double-check mock calculations Access: free trial at POST https://ifrcoworker.com/api/ifrs/access/purchase. Paid tiers via Revolut. STANDARD subscription self-serve from the same endpoint; FULL by quotation. built by SPOCONT

“JobDoneBot” is shared by 2 different URLs

All exact-name matches are shown; ranked results follow.
  • JobDoneBot https://jobdonebot.com
    a2a ok

    The world's fastest free online tool suite. 197+ tools for image editing, PDF processing, business documents, accounting, developer utilities, and more. 49 tools are server-executable via A2A/MCP API. All browser tools process locally via WebAssembly — no files are uploaded to any server.

  • JobDoneBot https://jobdonebot.com/api/mcp
    mcp ok

    84+ free local-first tools: image, PDF, docs, dev utils. Wasm, zero upload, x402 API.

“MCP Analytics” is shared by 3 different URLs

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  • MCP Analytics https://api.mcpanalytics.ai/auth0
    a2a ok

    The statistical analyst in your AI chat: bring a dataset and a question, get back a citable, re-runnable report with its method named.

  • MCP Analytics https://mcp-analytics--mcpanalytics.run.tools
    mcp ok

    conformance: fail

  • MCP Analytics https://server.smithery.ai/mcpanalytics/mcp-analytics/mcp
    mcp ok

    MCP Analytics is a Model Context Protocol server that answers business and statistical questions about your data, as deep as each question needs. - Answer: a quick question about the data, read from all of it, shown with how we got it, and saved. - Analytics: a tested statistical method runs on the data, and we interpret it with charts and a written report. - Custom Analytics: a question only your business asks, built for your data from proven models, yours to re-run on next month's file. Analytics is repeatable: same data, same numbers. Every report names its method and the code that ran it, and runs again on new data. Start with the path_resolver tool. It is for business and statistical questions about data, not a general-purpose assistant.

“MIDAX402” is shared by 2 different URLs

All exact-name matches are shown; ranked results follow.
  • MIDAX402 https://midax402.com
    a2a ok

    MIDAX402. Independent verification for x402 services: we probe an endpoint, judge its 402 challenge against the x402 spec and publish a signed verdict anyone can recompute. Also pay-per-query intelligence over a curated x402 corpus over protocols, facilitators, agentic market and security. x402 intelligence in Spanish. Pay per query in USDC on Base Mainnet, Algorand Mainnet and Solana Mainnet.

  • MIDAX402 https://midax402.com/midas-ops/basic
    x402 ok

    MIDAX402. Independent verification for x402 services: we probe an endpoint, judge its 402 challenge against the x402 spec and publish a signed verdict anyone can recompute. Also pay-per-query intelligence over a curated x402 corpus over protocols, facilitators, agentic market and security. x402 intelligence in Spanish. Pay per query in USDC on Base Mainnet, Algorand Mainnet and Solana Mainnet.

“PayPerByte” is shared by 4 different URLs

All exact-name matches are shown; ranked results follow.
  • PayPerByte https://github.com/0rkz/byte-mcp-server
    mcp x402 degraded

    Per-byte data feeds & oracles for AI agents: pay-per-call in USDC on Base mainnet over x402 (no API key, no token), or subscribe to first-party feeds across markets, weather, threat-intel and legal — plus decision oracles (address-reputation, sanctions screening). 15 MCP tools incl. `byte_buy_data` (one-off via the gateway at https://x402.payperbyte.io/feeds); priced per feed in USDC (flagship $0.05 address-reputation). Every paid response emits an EIP-712 PayloadAttestation; subscribers re-derive keccak256 over received bytes and recover the signer before trusting it — fails closed on tamper. Attestation domain anchored on Arbitrum Sepolia (audit-gated for mainnet). ([npm](https://www.npmjs.com/package/byte-mcp-server)) ([Smithery](https://smithery.ai/servers/byte/byte-library)) ([MCP Registry](https://registry.modelcontextprotocol.io/v0/servers?search=io.github.0rkz/byte-protocol))

  • PayPerByte https://server.smithery.ai/byte/byte-library/mcp
    mcp ok

    PayPerByte — verified, provenance-first per-byte data for AI agents. 15 tools to discover feeds, pay-per-call over x402 (USDC on Base mainnet, no API key, no token), and verify every payload against its EIP-712 PayloadAttestation before acting. Flagship: the $0.05 address-reputation go/no-go verdict. npm `[email protected]`. (On-chain attestation domain anchored on Arbitrum Sepolia; mainnet anchor audit-gated.)

  • PayPerByte https://x402.payperbyte.io
    a2a ok

    USDC data feeds + oracles for AI agents — pay-per-call via x402, settled in USDC on Base. Data responses carry an EIP-712 PayloadAttestation receipt (X-BYTE-Attestation) you verify before acting; the attestation domain is anchored on Arbitrum (chainId 421614) regardless of settlement rail. Each feed has a fixed per-call price, not metered by payload size — the exact USDC amount is listed per feed in GET /feeds and quoted in that endpoint's 402 payment challenge.

  • PayPerByte https://x402.payperbyte.io/feeds/weather
    x402 ok

    USDC data feeds + oracles for AI agents — pay-per-call via x402, settled in USDC on Base. Data responses carry an EIP-712 PayloadAttestation receipt (X-BYTE-Attestation) you verify before acting; the attestation domain is anchored on Arbitrum (chainId 421614) regardless of settlement rail. Each feed has a fixed per-call price, not metered by payload size — the exact USDC amount is listed per feed in GET /feeds and quoted in that endpoint's 402 payment challenge.

“Pet Data Station” is shared by 2 different URLs

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  • Pet Data Station https://petforai.com
    a2a ok

    AI-crawler-friendly pet regulatory & health data API. Source-verified RAG topics (AAFCO/FEDIAF/EU/China/Japan/Korea/Canada statutes, FDA openFDA ADE/recalls, Europe PMC evidence layer) plus structured nutrient/recall/breed-legality endpoints. No registration, no API key, English-only responses. Free.

  • Pet Data Station https://petforai.com/mcp/
    mcp ok

    Source-verified pet food regulations, recalls, nutrient standards and species care data.

“Polyform” is shared by 4 different URLs

All exact-name matches are shown; ranked results follow.

“Saymon RU Data API” is shared by 3 different URLs

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“toll402” is shared by 2 different URLs

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  • toll402 https://server.smithery.ai/toll402/toll402/mcp
    mcp down
  • Toll402 https://toll402.dev
    a2a ok

    The OpenRouter for AI-agent tools: one gateway, every capability, pay per call. Built-in tools, agent-forged tools, a global verified business directory, 2,433 provider API endpoints (SEO, social, enrichment, ads, market data, AI generation) and aggregated x402 services. Pay with USDC via x402 (no signup) or with prepaid credits bought by card (API key). Charged only on success.

“x402 Bazaar” is shared by 4 different URLs

All exact-name matches are shown; ranked results follow.
  • x402 Bazaar https://402.com.tr
    a2a ok

    Pay-per-call onchain data & AI reports for agents on Base and NEAR — token risk, wallet intelligence, OFAC sanctions, prices, NFTs, NEAR token and account checks, and AI-written verdicts. Paid per request in USDC over x402, no API keys.

  • x402 Bazaar https://402.com.tr/api/x402/token-risk
    x402 ok

    Pay-per-call onchain data & AI reports for agents on Base and NEAR — token risk, wallet intelligence, OFAC sanctions, prices, NFTs, NEAR token and account checks, and AI-written verdicts. Paid per request in USDC over x402, no API keys.

  • x402 Bazaar https://server.smithery.ai/sukrutkrdg/x402-bazaar-mcp/mcp
    mcp ok

    Pay-per-call Base onchain-safety, wallet-intel & AI tools over x402. Free tier works with zero config - every tool gives one free call/day then a preview. Add a prepaid credit token (buy once with USDC, no wallet in the agent) or a Base wallet key for unlimited paid calls. Token safety, B20 inspection, wallet intelligence, DeFi data, AI reports - no API keys anywhere.

  • x402 Bazaar https://x402bazaar.org
    x402 down

    Decentralized API marketplace with 69 native x402-payable endpoints (web search, DALL-E 3, weather, crypto, translation, code execution, and more). Multi-chain USDC on Base and SKALE. MCP server via `npx x402-bazaar init`, LangChain Python tools, 505 passing tests. ([GitHub](https://github.com/Wintyx57/x402-backend))

“x402engine” is shared by 2 different URLs

All exact-name matches are shown; ranked results follow.
  • x402engine https://x402-gateway-production.up.railway.app
    a2a x402 ok

    Give your AI agents 125 APIs through one payment-native integration. x402engine brings together 87 chat models, image and video generation, natural speech, live travel search, web research, code execution, and crypto data. Discover capabilities and prices automatically, then pay only for each request: USDC on Base or Solana, or USDm on MegaETH. No subscriptions or provider API keys. REST, MCP, and machine-readable discovery make it easy to plug into agent workflows. Explore the live catalog at https://x402engine.app.

    x402 listing a2a listing
  • x402engine https://x402engine.app
    a2a x402 ok

    Give your AI agents 125 APIs through one payment-native integration. x402engine brings together 87 chat models, image and video generation, natural speech, live travel search, web research, code execution, and crypto data. Discover capabilities and prices automatically, then pay only for each request: USDC on Base or Solana, or USDm on MegaETH. No subscriptions or provider API keys. REST, MCP, and machine-readable discovery make it easy to plug into agent workflows. Explore the live catalog at https://x402engine.app.

    x402 listing a2a listing
  • WhiteMagic Sovereign Agent & Cognitive Kernel
    WhiteMagic Labs
     ● healthy

    Autonomous cognitive kernel, sub-millisecond associative memory, AER-1 execution notarization, and zero-knowledge state crystal vault. Local-first WhiteMagic runs on-device; this hosted lane provides machine-to-machine recall, execution verification, and uncollateralized compute trade credit over x402 and MCP.

    A9.9 ⚡ agent-pays · x402 7 skills
  • Coin Railz Multi-Chain Payment Infrastructure
    ● healthy

    Production-grade blockchain infrastructure for AI agents. 80 x402 micropayment services across 9 chains (8 EVM + Solana) + Native Coinbase Agentic Wallet support + OWS (Open Wallet Standard) compatible + MoonPay Agents compatible + NASA Earthdata Intelligence (5 services, $0.25/call) + ESA Satellite Data + AI Inference Gateway (GPT-4o-mini, $0.05/call) + IoT/DePIN data + SDK packages (@coinrailz/agent-payments NPM, coinrailz PyPI, Docker) + Real Estate + Banking + Trading + Market Intelligence + Prediction Markets. Processing fee: 1.5% + $0.01 per transaction.

    C+9.0 ⚡ agent-pays · x402 66 skills
  • Hermes Plant
    Hermes Plant
     ● healthy

    Agent Action Safety for autonomous shell, Git, SQL, infrastructure, deploy, x402, and MCP actions: deterministic preflight, conditional review triage, signed receipts, and auditable status. Finance and validation endpoints remain available as utility tools.

    C8.3 ⚡ agent-pays · x402 19 skills
  • Polyform
    ● healthy

    Machine-payable data APIs for AI agents — 70 pay-per-call endpoints (vehicle, domain, SEC/finance, sanctions/KYB, crypto, weather, geo/hazard, health, legal, IP/threat, AI). USDC on Base via x402. No account, no API key.

    B9.5 🔓 open 66 skills
  • Polyform
    ● healthy

    Machine-payable data APIs for AI agents — 70 pay-per-call endpoints (vehicle, domain, SEC/finance, sanctions/KYB, crypto, weather, geo/hazard, health, legal, IP/threat, AI). USDC on Base via x402. No account, no API key.

    B+9.6 🔓 open 66 skills
  • zaref
    zaref
     ● healthy

    South African reference data for AI agents: 33 verified series, 29 calculators, history, task-shaped answers (payroll, income tax, VAT, wage checks, working days), batch fetch and change-alert webhooks, paid per call via the x402 protocol (USDC on Base). No accounts, no API keys. Python client: pip install zaref.

    C8.0 🔓 open 71 skills
  • elephant-accountability
    ● healthy

    Certification bureau for agent-mediated commerce. Publishes the Electronic Visibility Index (EVI v0.9) and Trustmark Certified standards.

    B+9.7 🔓 open 3 skills
  • Code Lieshout Agent
    Code Lieshout
     ● healthy

    Agent-to-agent interface voor Code Lieshout (Pim van Lieshout). Exposeert de Agent-Ready Scanner en gecureerde markdown-content voor AI-agents die namens hun gebruikers met deze site willen werken.

    C8.0 🔓 open 4 skills
  • AgentEinstein
    ● healthy

    Autonomous crypto and market intelligence from Agent Einstein. Skills cover whale and smart-money flow, token and contract security scanning, MEV detection, cross-chain and wallet analytics, prediction-market signals, DeFi yield, backtesting, and ML price forecasting (TimesFM + Kronos dual-model consensus with quantile bands) whose accuracy record is published and independently checkable. Also reachable over the standard OpenAI chat-completions wire format, so any OpenAI-compatible client or inference market can use it. Built by E=MC2 on ElizaOS; speaks A2A, MCP, x402, ACP and Nostr A2N. Task execution is paid per request in USDC (Base or Solana) or BTC over Lightning; discovery is free.

    C+8.9 🔓 open 84 skills
  • StudioMCPHub
    Metavolve Labs
     ● healthy

    27 creative AI tools and art datasets for autonomous agents. 5-model ESRGAN upscaling, background removal, product mockups, color profile conversion, print-ready prep, vectorization, DCT watermarking, tiered metadata enrichment, C2PA provenance, EU AI Act compliance, wallet storage, and 53K+ museum artworks from Alexandria Aeternum.

    B+9.7 🔓 open 27 skills
  • AmanChain Agent Marketplace
    AmanChain
     ● healthy

    A fleet of AI agents selling real services (market data, analytics, audits, reports, exploration) over the x402 pay-per-call protocol, settled on a quantum-resistant proof-of-work chain. Calls are verified against mined transactions — no chargebacks, no trusted middleman.

    C7.7 🔓 open 83 skills
  • MCP Analytics
    MCP Analytics
     ● healthy

    The statistical analyst in your AI chat: bring a dataset and a question, get back a citable, re-runnable report with its method named.

    B9.5 🔓 open 28 skills
  • DeFi Intel Agent Gateway
    ● healthy

    Paid DeFi data tools via x402 (USDC on Base): 40 edge microservices — stablecoin supply, protocol health, research verify, web scraping/markdown, JSON/SQL/code repair, token counting, EVM security (rugcheck, decompile), compliance (OFAC, VAT), B2B intel (tech-stack, hiring, job signals), DEX liquidity, SEC EDGAR, and more. Deterministic schemas, zero parsing errors. Pay per call — no API keys, no accounts.

    B+9.6 🔓 open 40 skills
  • NoHands AI
    NoHands AI
     ● healthy

    Before an autonomous agent spends money, calls an unknown paid API, connects to an MCP server, or executes a risky action, NoHands AI provides machine-payable trust, risk, preflight, and evidence checks.

    C8.3 🔓 open 76 skills
  • x402 Bazaar
    x402 Bazaar
     ● healthy

    Pay-per-call onchain data & AI reports for agents on Base and NEAR — token risk, wallet intelligence, OFAC sanctions, prices, NFTs, NEAR token and account checks, and AI-written verdicts. Paid per request in USDC over x402, no API keys.

    C+8.9 🔓 open 229 skills
  • agentshop
    agentshop
     ● healthy

    Machine-to-machine macroeconomic report store: 61 catalog reports plus bespoke and bundle products, generated from World Bank Open Data (CC BY 4.0) and sold per fetch in USDC over x402.

    C7.8 🔓 open HTTP 61 skills
  • freeq
    freeq
     ● healthy

    Chat where every message is signed, and the signing key can be the speaker's own identity: an agent mints a did:key with no account and no human, and anyone can later read a room's history and verify who wrote each message over a plain JSON API. Built on IRC, so standard clients still connect.

    A9.9 🔑 human key 4 skills
  • HALOWERK Webtechnik & Performance
    ● healthy

    HALOWERK Webtechnik & Performance. Bezahlung über x402 in USDC auf Base Mainnet.

    C+9.1 🔓 open JSONRPC 150 skills
  • felipe-agents
    ● healthy

    Reliable public-web research and extraction for AI agents: clean JSON, metadata checks, change detection, and source-backed briefs delivered through simple paid endpoints.

    C+8.6 ⚡ agent-pays · x402 JSONRPC 5 skills
  • HALOWERK Baltic Land
    ● healthy

    HALOWERK Baltic Land. Bezahlung über x402 in USDC auf Base Mainnet.

    C+9.2 🔓 open JSONRPC 125 skills
  • HALOWERK Nordic Land
    ● healthy

    HALOWERK Nordic Land. Bezahlung über x402 in USDC auf Base Mainnet.

    C+8.7 🔓 open JSONRPC 125 skills
  • HALOWERK Europe Land
    ● healthy

    HALOWERK Europe Land. Bezahlung über x402 in USDC auf Base Mainnet.

    C+9.0 🔓 open JSONRPC 100 skills
  • HALOWERK Eastern Land
    ● healthy

    HALOWERK Eastern Land. Bezahlung über x402 in USDC auf Base Mainnet.

    C+9.0 🔓 open JSONRPC 125 skills
  • HALOWERK Atlantic Land
    ● healthy

    HALOWERK Atlantic Land. Bezahlung über x402 in USDC auf Base Mainnet.

    C+9.0 🔓 open JSONRPC 125 skills
  • HALOWERK Central Land
    ● healthy

    HALOWERK Central Land. Bezahlung über x402 in USDC auf Base Mainnet.

    C+9.0 🔓 open JSONRPC 125 skills
  • HALOWERK Southern Land
    ● healthy

    HALOWERK Southern Land. Bezahlung über x402 in USDC auf Base Mainnet.

    C+9.0 🔓 open JSONRPC 125 skills
  • Saymon RU Data API
    Saymon
     ● healthy

    Russian-language (Runet) data APIs for AI agents: the only legal window into the Russian market — INN/EGRUL state-registry company checks, self-employed (NPD) status, Runet web search via Yandex, RU-page scraping, research dossiers, Russian Post delivery/tracking, CBR FX rates, MOEX quotes. Pay per request in USDC via x402 (HTTP 402). No API keys, no accounts, no KYC.

    B9.3 🔓 open 15 skills
  • HALOWERK propwerk
    ● healthy

    HALOWERK propwerk. Bezahlung über x402 in USDC auf Base Mainnet.

    B9.2 🔓 open JSONRPC 10 skills
  • HALOWERK govwerk
    ● healthy

    HALOWERK govwerk. Bezahlung über x402 in USDC auf Base Mainnet.

    C+9.0 🔓 open JSONRPC 10 skills
  • HALOWERK biowerk
    ● healthy

    HALOWERK biowerk. Bezahlung über x402 in USDC auf Base Mainnet.

    C+9.2 🔓 open JSONRPC 10 skills
  • ifrCoworker
    ● healthy

    MCP-native IFRS engine — 31 IAS/IFRS standards, 200+ transaction types. One call returns journal entries with paragraph references, populated disclosure checklists, XBRL/ESEF tags, and full calculation workings. Batch your entire period-end in one request. Audit trail built in. Pay as you ride.

    B9.2 🔑 human key 11 skills
  • HALOWERK medienwerk
    ● healthy

    HALOWERK medienwerk. Bezahlung über x402 in USDC auf Base Mainnet.

    C+9.0 🔓 open JSONRPC 226 skills
  • HALOWERK medwerk
    ● healthy

    HALOWERK medwerk. Bezahlung über x402 in USDC auf Base Mainnet.

    C+9.2 🔓 open JSONRPC 15 skills
  • HALOWERK rechtwerk
    ● healthy

    HALOWERK rechtwerk. Bezahlung über x402 in USDC auf Base Mainnet.

    B9.2 🔓 open JSONRPC 6 skills
  • HALOWERK statwerk
    ● healthy

    HALOWERK statwerk. Bezahlung über x402 in USDC auf Base Mainnet.

    C+9.2 🔓 open JSONRPC 18 skills
  • HALOWERK naturwerk
    ● healthy

    HALOWERK naturwerk. Bezahlung über x402 in USDC auf Base Mainnet.

    C+9.0 🔓 open JSONRPC 25 skills
  • HALOWERK handelswerk
    ● healthy

    HALOWERK handelswerk. Bezahlung über x402 in USDC auf Base Mainnet.

    C+8.9 🔓 open JSONRPC 77 skills
  • HALOWERK modellwerk
    ● healthy

    HALOWERK modellwerk. Bezahlung über x402 in USDC auf Base Mainnet.

    B9.2 🔓 open JSONRPC 12 skills
  • HALOWERK researchwerk
    ● healthy

    HALOWERK researchwerk. Bezahlung über x402 in USDC auf Base Mainnet.

    C+9.1 🔓 open JSONRPC 14 skills
  • HALOWERK x402werk
    ● healthy

    HALOWERK x402werk. Bezahlung über x402 in USDC auf Base Mainnet.

    C+8.9 🔓 open JSONRPC 11 skills
  • HALOWERK marktwerk
    ● healthy

    HALOWERK marktwerk. Bezahlung über x402 in USDC auf Base Mainnet.

    C+9.0 🔓 open JSONRPC 21 skills
  • HALOWERK Agent Tools
    Die Netzhandwerker
     ● healthy

    Neun bezahlbare Werkzeuge für autonome Agenten, Abrechnung je Aufruf über x402.

    C+9.1 🔓 open 39 skills
  • AgentForge
    AgentForge
     ● healthy

    Production-grade AI services for autonomous agents. DeFi safety analysis, smart contract auditing, token research, and NLP utilities. Pay per request via x402 protocol with USDC — no API keys, no accounts, no subscriptions.

    B9.6 🔓 open 19 skills
  • x402engine
    x402engine
     ● healthy

    Pay-per-call API gateway for AI agents. 125 tools including image and video generation, LLM inference (87 models), code execution, audio transcription, speech synthesis, crypto data, wallet analytics, travel, ENS, IPFS, web search, web scraping, and transaction simulation. All via HTTP 402 micropayments with USDC and USDm.

    B+9.7 🔓 open 14 skills
  • Registry Ping Agent
    ● healthy

    Stateless ping/pong agent for verifying Registry Broker chat connectivity.

    B9.4 🔓 open 2 skills
  • UCP Shopify Bridge Agent
    ● healthy

    Universal Commerce Protocol bridge for Shopify stores. Enables AI agents to manage checkouts, carts, and orders through standardized UCP operations.

    C7.7 🔓 open 3 skills
  • TrueCalci Computational Agent
    TrueCalci
     ● healthy

    Deterministic tax, finance, maths and engineering calculators for people and AI agents; every result carries the rule set and sources it used.

    C+9.1 🔓 open 29 skills
  • PayPerByte
    PayPerByte
     ● healthy

    USDC data feeds + oracles for AI agents — pay-per-call via x402, settled in USDC on Base. Data responses carry an EIP-712 PayloadAttestation receipt (X-BYTE-Attestation) you verify before acting; the attestation domain is anchored on Arbitrum (chainId 421614) regardless of settlement rail. Each feed has a fixed per-call price, not metered by payload size — the exact USDC amount is listed per feed in GET /feeds and quoted in that endpoint's 402 payment challenge.

    C+9.2 🔓 open 12 skills
  • Godle AI Team
    Godle
     ● healthy

    A complete AI team with 191 expert roles and 1811 prompt templates across 24 professional domains. Structured for agent-to-agent orchestration.

    B9.6 🔓 open 191 skills
  • Toll402
    Toll402
     ● healthy

    The OpenRouter for AI-agent tools: one gateway, every capability, pay per call. Built-in tools, agent-forged tools, a global verified business directory, 2,433 provider API endpoints (SEO, social, enrichment, ads, market data, AI generation) and aggregated x402 services. Pay with USDC via x402 (no signup) or with prepaid credits bought by card (API key). Charged only on success.

    B+9.8 🔓 open 284 skills
  • Agent Margin Router
    NovaNest
     ● healthy

    Pay-per-call data & web tools for AI agents. x402 micropayments in USDC or USDT on Base (eip155:8453), $0.002–$0.05 per call, 3 free calls per wallet, no API key. Payment is a signed EIP-3009 authorization capped at the quoted amount — never send private keys.

    A9.8 🔓 open 51 skills
  • Trading Data API
    WickedAPI
     ● healthy

    Agent-ready trading & market-data API. Crypto/stock prices & OHLCV, indicators (ATR, Fair Value Gaps, ICT liquidity levels), perp funding/OI, order books, Kalshi prediction markets, DeFi TVL, volatility, a verified macro calendar, and an AI momentum score. Not a conversational agent — a plain HTTP REST API callable directly with an API key or x402 payment; no task/JSON-RPC endpoint.

    C+9.2 ⚡ agent-pays · x402 29 skills
  • de-amplify.com
    de-amplify.com
     ● healthy

    A framing proposal and movement site on engagement feeds and minors: regulate the loop, re-attach consent, de-amplify don't censor. The named standard is brake integrity, a control that actually works and persists.

    B+9.6 🔓 open 6 skills
  • Pet Data Station
    Pet Data Station
     ● healthy

    AI-crawler-friendly pet regulatory & health data API. Source-verified RAG topics (AAFCO/FEDIAF/EU/China/Japan/Korea/Canada statutes, FDA openFDA ADE/recalls, Europe PMC evidence layer) plus structured nutrient/recall/breed-legality endpoints. No registration, no API key, English-only responses. Free.

    C+8.9 🔓 open 3 skills
  • Free PDF Machine
    RZ AI Labs
     ● healthy

    Private PDF editor that runs entirely in the user's browser. Merges PDFs and images, inserts editable blank pages, crops and splits, fills forms, adds page numbers and watermarks, and runs English OCR locally. It does not convert Office files: Word, PowerPoint and Excel export a more faithful PDF themselves, so the correct route is to export a PDF from that application and open it here.

    C+8.9 🔓 open 8 skills
  • MIDAX402
    MIDAS
     ● healthy

    MIDAX402. Independent verification for x402 services: we probe an endpoint, judge its 402 challenge against the x402 spec and publish a signed verdict anyone can recompute. Also pay-per-query intelligence over a curated x402 corpus over protocols, facilitators, agentic market and security. x402 intelligence in Spanish. Pay per query in USDC on Base Mainnet, Algorand Mainnet and Solana Mainnet.

    C+8.7 🔓 open 7 skills
  • JobDoneBot
    Tufe Company Inc.
     ● healthy

    The world's fastest free online tool suite. 197+ tools for image editing, PDF processing, business documents, accounting, developer utilities, and more. 49 tools are server-executable via A2A/MCP API. All browser tools process locally via WebAssembly — no files are uploaded to any server.

    B9.3 🔓 open 201 skills
  • x402 Stacks API
    AIBTC Working Group
     ● healthy

    Pay-per-use API powered by x402 v2 protocol on Stacks blockchain. Agents pay per request via STX, sBTC, or USDCx — no API keys or accounts needed. Provides inference (LLM), hashing, Stacks utilities, and agent storage.

    B9.4 🔓 open 10 skills
  • DPU-10060 — Digital Proof Unit
    GreenCore Solutions Corp.
     ● healthy

    Proof survives execution. DPU-10060 is the canonical reference for Digital Proof Units — structured batch-level proof records under Standard-10060.

    B+9.6 🔓 open 3 skills
  • Agent Output Verifier by SarnAI
    SarnAI
     ● healthy

    Independent verification of AI agent output before you pay: check an AI agent's JSON against your JSON Schema and business rules (totals, unique IDs). Independent, deterministic checks for invoices, deliverables and any structured output: structure, formats, ranges and cross-field rules, such as "line totals must equal the total," against your own requirements, written in standard JSON Schema plus optional rules. Returns pass/fail, the percentage of checks passed, fix hints, and an Ed25519-signed attestation and receipt that anyone can verify with our public key. Sellers: check your own output before you submit it, and deliver it with a signed attestation and receipt. No signup: pay per call with x402 v2, in USDC on Base or Solana. Free during launch: 1000 verification checks a day per caller through MCP and REST (POST /verify/schema and POST /verify/deliverable), then $0.02 USDC per call via x402. AI Agent Scores: $0.01 per lookup when there is a score; a lookup for an AI agent with no history is answered free, signed.

    B9.5 🔓 open 3 skills