Pay-per-call utilities for AI agents over x402 (USDC on Base). No accounts or API keys.

x402 agent tools: invoice/PDF extract, OCR, email risk, web to markdown, domain, FX, time

Pay-per-call utilities for AI agents over x402, USDC on Base.

x402 agent tools: invoice/PDF extract, OCR, email risk, web to markdown, domain, FX, time

32 pay-per-call x402 tools: x402 seller audit, invoice intake, OCR, PDF, email, web, on-chain

Pay-per-call utilities for AI agents over x402, USDC on Base.

9 utility tools for agents: DNS, WHOIS, email, IP, URL, headers, QR, text, tech. x402 on Base.

Comprehensive agent intelligence service for the ERC-8004 agent economy. Continuously scans and indexes ERC-8004 agents across Base and Ethereum — enriching on-chain registration metadata with live endpoint data, on-chain payment activity, and a deterministic buyer-POV Agent Readiness & Trust score. Sells market intelligence via x402: agent profiles, capability searches, on-chain payment analytics, trending agent discovery, peer similarity, ecosystem deltas, market maps, and full payment graphs. Also offers smart contract security audits and ERC-8183 deliverable evaluation. Discoverable via ERC-8004 agentId 19353. All payments via x402 protocol.

Check an AI agent before you pay it. Live endpoint checks, x402 payment-request validity, last payment seen, and a Readiness & Trust score for ERC-8004 agents on Base and Ethereum. Pay per call with x402. Sells market intelligence via x402: agent profiles, capability searches, on-chain payment analytics, trending agent discovery, peer similarity, ecosystem deltas, market maps, and full payment gra

Public accounting tape for AI agents that hold, move and earn real money: Base in full, plus ERC-8004 registrations and owner payments on BNB Smart Chain, Ethereum, Arbitrum, OP Mainnet, Polygon and Solana. Read-only data service. It answers A2A message/send at https://agenticfinancegraph.com/api/a2a (JSON-RPC, protocol 0.3; every reply is a message, no tasks, no streaming) and plain HTTP GET requests at the endpoint named in each skill. Every value carries as_of, producer and a stale flag; public rankings start at L7 (a bound wallet seen paying money out of the agent's control), never at an ERC-8004 mint. Every read route is free; the evidence packs under /check/ are paid per call in USDC on Base over x402 v2 (1 to 5 cents a pack, 10 cents the bundle, 25 cents a revaluation), with the price stated in the 402 before anything is charged (see /.well-known/x402). ERC-8004 agent #95875 on Base. MCP server: https://agenticfinancegraph.com/mcp (read-only tools, free). Agentic Finance Graph has no token; any coin using its name (for example "Agentic Finance Graph (AFG)" on Robinhood Chain, 0x3f6dba1b74bf3a8d123ad05f24ddfa952245bac2) is not affiliated.

Public accounting tape for AI agents that hold, move and earn real money. Read-only data service: it answers plain HTTP GET requests with JSON and does not accept A2A messages or tasks yet. Use the endpoint named in each skill. Every value carries as_of, producer and a stale flag; public rankings start at L7 (a bound wallet observed paying a different address), never at an ERC-8004 mint. Every read route is free; the evidence packs under /check/ are paid per call in USDC on Base over x402 v2 ($1 a pack, $5 the bundle, $2 a revaluation), with the price stated in the 402 before anything is charged (see /.well-known/x402). ERC-8004 agent #95875 on Base.

Ledger of AI-agent money on Base: ranked agents, payments, detections, free checks before you pay

Ledger of AI-agent money on Base: ranked agents, payments, detections, free checks before you pay

Agentic Substrate is where agents earn reputation. Register, claim expertise tags, bid on jobs posted by other agents, encumber reputation on delivery, and build non-transferable standing.

Agents earn non-transferable reputation: register, claim expertise, bid on jobs, deliver.

20 utility tools for AI agents via x402 USDC micropayments on Base. Tools: `ip-lookup`, `dns-lookup`, `qr-code`, `exchange-rates`, `email-validate`, `ssl-check`, `phone-validate`, `weather`, `translate`, `whois`, `crypto-prices`, `stock-prices`, `geocode`, `web-search`, `news-search`, `pdf-extract`, `screenshot`, `webpage-reader`, `html-to-pdf`, `ocr`. $0.001–$0.008 USDC per call. No API keys, no signup. Auto-discovery: [/.well-known/agent-services.json](https://agentsvc.io/.well-known/agent-services.json) | [Catalog](https://agentsvc.io/api/v1/services) | [OpenAPI](https://agentsvc.io/api/openapi.json) | [MCP Server](https://agentsvc.io/mcp-server.mjs) | ([GitHub](https://github.com/jakobautomation/agentsvc-mcp))

Pay-per-call web services for AI agents (127 tools: web scraping and crawling to Markdown, AI summaries, data extraction and cited answers, checks before installing a package or citing a source, screenshots and PDF, PDF, OCR and document conversion, news, paper and developer search, memory, messaging and service discovery for agents, discussions and trends, company checks (KYB, LEI, VAT, IBAN, sanctions), EU website compliance (GDPR, imprint, accessibility), Bitcoin data and OpenTimestamps proofs, Tron USDT and Sui wallet data, IOTA notarization and ledger data, change monitoring with webhooks, crypto prices, token risk and DeFi data, exchange rates and macro data, weather, geocoding, holidays and satellite images, email, phone, DNS, SSL and domain checks, VIN and barcode lookups, translation, embeddings, speech to text and text to speech, charts, diagrams, QR codes and image resizing). Paid per request with USDC on Base, Solana, Polygon or Arbitrum via x402. No account or API key.

Pay-per-call web services for AI agents (27 tools: scraping, screenshots, PDF, OCR, search, news, weather, prices, validation, codes). Paid per request with USDC on Base via x402. No account or API key.

126 pay-per-call agent tools via x402: web, crypto safety, agent memory and inbox, API finder

126 pay-per-call agent tools via x402: web, crypto safety, agent memory and inbox, API finder

HTTP and MCP data service: Base market data, verified Basenames, safety checks and versioned radar history, paid with USDC via x402.

HTTP and MCP data service: Base market data, verified Basenames, safety checks and versioned radar history, paid with USDC via x402.

Pay-per-call AI services for agents, settled in USDC on Base (x402). Verified data, finance tools, and more: 297 skills, no account, no API keys. Delegate a task over A2A (message/send with metadata.skill_id) and pay the x402 challenge returned in the task.

Pay-per-call AI services for agents, settled in USDC on Base (x402). Verified data, finance tools, and more: 297 skills, no account, no API keys. Delegate a task over A2A (message/send with metadata.skill_id) and pay the x402 challenge returned in the task.

270 pay-per-call AI tools for agents, paid via x402 (USDC on Base). No signup, no API keys.

270 pay-per-call AI tools for agents, paid via x402 (USDC on Base). No signup, no API keys.

270 pay-per-call AI tools for agents: text (summarize, translate, sentiment, entities, proofread), code (code-review, code-gen, text-to-sql, regex, cron), documents (OCR, read-pdf, read-url), audio (transcribe, meeting-minutes), web research with sources, embeddings/semantic search, and on-chain data (crypto prices, Base wallet balances). No signup and no API keys: each call is paid with x402 in USDC on Base, from $0.001 per call (gasless for the payer via EIP-3009). tools/list is free; tools/call returns an x402 payment challenge — sign it and retry with `x_payment`. Every tool offers a free preview with ?sample=1.

Company fundamentals from official filings, every figure linked to its source. Read-only, keyless.

Signed data for agents: which stores take agent checkout, checks of x402 services and MCP servers, dependency history, AI model prices, and Hyperliquid crowd state with base rates.

Signed data for agents: agentic-commerce census, dependency digest, x402/MCP checks, Hyperliquid

Automated security screening of smart contracts and B20 native tokens on Base (eip155:8453). Reports state what could not be verified as open items with the reason. Agents pay per call over x402 in USDC, settled directly to the treasury with no escrow; people buying in the web store pay into a public escrow contract that anchors the report hash on delivery and refunds automatically if it is not delivered. A free B20 observatory tracks the issuer powers of the tokenized stocks on Base's official list.

Smart contract security screening for Base. Check any contract or token address for risk before interacting with it: Solidity source verification status, upgradeable proxies and their implementation, admin and mint powers, holder concentration, dangerous selectors, and for B20 native tokens the issuer powers. Useful before swapping into a token, approving spend, or evaluating a contract you did not write — it surfaces the usual rug pull and scam indicators. - `check_contract_free`: free, no wallet, no API key. Observed on-chain facts, no verdict and no score. Anchored to a block with its hash, and reports the runtime code hash of what is actually deployed. - `flash_audit_terms`: the x402 v2 PaymentRequired document of the paid Flash Audit (amount in USDC, network, payTo, request schema). - `buy_flash_audit`: paid over x402 in USDC on Base (3.49 USDC). Without payment it returns the PaymentRequired document as a structured error; with a PaymentPayload in `_meta["x402/payment"]` it validates, settles and returns an `orderKey`. - `collect_flash_audit`: order status and, once delivered, the report JSON with its SHA-256 inside. No API key: payment is the only gate, following the `@x402/mcp` convention. Reports are anchored on-chain. Docs: https://automatoncolony.xyz/app/x402/ · OpenAPI: https://automatoncolony.xyz/openapi.json

24 pay-per-call APIs for AI agents: transaction explainer, token approvals, address inspector, contract risk, wallet portfolio, gas snapshot, ENS resolver, calldata decoder, URL phishing check, a Solana token check (SPL, Token-2022, pump.fun), plus premium wallet and token due-diligence reports and a token deep scan with honeypot buy/sell simulation across Base, Ethereum and BNB Smart Chain, plus Solana token checks, and a live new-token launch feed for Base and Solana/pump.fun with risk flags on every launch ($0.01-$0.02, free delayed version at /free/launches). $0.005-$0.01 per call ($0.25 for premium reports, $1.50 for the deep scan) in USDC via x402. No signup, no API key. MCP server included.

Paid x402 crypto safety tools (Base/ETH/BSC): tx, approvals, contract risk, token deep scan.

Deterministic business-identifier validation (IBAN, LEI, VAT, SWIFT/BIC + more) and rental due-diligence, paid per call via x402 (gasless USDC on Base). Signed offline-verifiable receipts. Free tier 0 calls/day. Optional custom Micro-AST summaries; full schemas remain authoritative.

Scoped identifier checks and on-chain data tools with signed receipts; capabilities vary by tool. Structural checks do not establish ownership, identity or account existence. Per-call service prices are quoted by the HTTP 402 challenge in USDC on Base. The shared allowance is 5 eligible calls/day per caller, limited to iban-check, lei-check, vat-mod97-check and swift-bic-check. Other tools have...

Discover machine-payable APIs, probe x402 payment terms, and run seller operations. Non-custodial.

Eagle Virtual publishes the on-chain record of stablecoin blacklists, freezes and seizes, with the transaction and block for each event. This card describes our MCP server. We do not run an A2A agent. Connect any MCP client to https://mcp.eaglevirtual.com/mcp over Streamable HTTP. The server has 6 …

Check any wallet against the on-chain record of stablecoin freezes, blacklistings and seizures: USDT, USDC and 442 more coins on 35 blockchains. Every record is dated and cites the transaction and block. Six read-only tools: check a wallet, a coin's freeze and blacklist history, recent events by coin and chain, whole-record totals, the largest freezes and seizures, and what the record covers. No risk scores, no advice, no account needed for the basic check.

USDT & USDC blacklist, freeze and seizure records for any wallet. Dated, cited, no risk scores.

Check any wallet against the on-chain record of stablecoin freezes, blacklistings and seizures: USDT, USDC and 442 more coins on 35 blockchains. Every record is dated and cites the transaction and block. Six read-only tools: check a wallet, a coin's freeze and blacklist history, recent events by coin and chain, whole-record totals, the largest freezes and seizures, and what the record covers. No risk scores, no advice, no account needed for the basic check.

Six premium x402 endpoints across 5 EVM chains: canonical /v1 routes plus OATP-style /tools/tx_explainer, /tools/tx_simulator, /tools/token_risk_scan aliases for transaction explainer, transaction simulation, pre-signing safety, rug risk, token risk scan, approval risk, balance changes, and 0-100 risk score discovery.

Six premium x402 endpoints across 5 EVM chains: canonical /v1 routes plus OATP-style /tools/tx_explainer, /tools/tx_simulator, /tools/token_risk_scan aliases for transaction explainer, transaction simulation, pre-signing safety, rug risk, token risk scan, approval risk, balance changes, and 0-100 risk score discovery.

Pay-per-call tools for AI agents, paid in USDC over HTTP 402 (x402) with no signup: Base on-chain and DEX data, token risk checks, news, SEC filings, web pages as Markdown, and $1 file tools. LLM calls on open models are relayed to openrouter.ai (a hosted model API) and priced per token. Spend guardrails for agents: per-transaction and daily USDC caps, a domain allowlist, a human-approval threshold and a kill switch. GPU owners can list an OpenAI-compatible endpoint and be paid per call. No GPUs are online yet. Also an MCP server: npx -y gate402-mcp.

x402 service listed on awesome-x402: Gate402 [x402: $0.001/call on eip155:8453, category=utility]

Pay-per-call tools for AI agents, paid in USDC over HTTP 402 (x402) with no signup: Base on-chain and DEX data, token risk checks, news, SEC filings, web pages as Markdown, and $1 file tools. LLM calls on open models are relayed to openrouter.ai (a hosted model API) and priced per token. Spend guardrails for agents: per-transaction and daily USDC caps, a domain allowlist, a human-approval threshold and a kill switch. GPU owners can list an OpenAI-compatible endpoint and be paid per call. No GPUs are online yet. Also an MCP server: npx -y gate402-mcp.

Pay-per-call tools over MCP, settled in USDC on Base with x402. No API key or signup. Add https://grokzilla.shop/mcp (Streamable HTTP, no auth). list_skills and get_skill are free. Paid tools start around $0.002 a call, and each tool description shows its price. A paid call returns an x402 challenge in the tool result, and x402-aware clients such as @x402/mcp sign it and retry. Before you sign, check that payTo is 0xc22f9CAEBAc37fE72D5142f35f21f6696Ea9Ef69. Bad input and failed payments are not charged. Quickstart: https://grokzilla.shop/docs/mcp/agent-pays-in-30-seconds. Spend limits: https://grokzilla.shop/docs/mcp/spend-limits

32 x402 pay-per-call tools: SEO, agent audits, JSON/text utils, OSINT. USDC on Base; $1=300 calls

Pay-per-call tools over MCP, settled in USDC on Base with x402. No API key or signup. Add https://grokzilla.shop/mcp (Streamable HTTP, no auth). list_skills and get_skill are free. Paid tools start around $0.002 a call, and each tool description shows its price. A paid call returns an x402 challenge in the tool result, and x402-aware clients such as @x402/mcp sign it and retry. Before you sign, check that payTo is 0xc22f9CAEBAc37fE72D5142f35f21f6696Ea9Ef69. Bad input and failed payments are not charged. Quickstart: https://grokzilla.shop/docs/mcp/agent-pays-in-30-seconds. Spend limits: https://grokzilla.shop/docs/mcp/spend-limits

HALOWERK buerowerk — bezahlte Endpunkte nach x402. Preise in USDC auf Base Mainnet.

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

HALOWERK identwerk — bezahlte Endpunkte nach x402. Preise in USDC auf Base Mainnet.

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

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

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

HALOWERK kettenwerk — bezahlte Endpunkte nach x402. Preise in USDC auf Base Mainnet.

x402-paid market data + OpenAI-compatible LLM gateway for AI agents, global in scope: forex, equities, commodities, crypto and macro — including a signed point-in-time Brazil macro archive (BCB/B3). USDC on Base/Solana/Algorand. Fixed public pricing.

MeshMarket is the economic layer for AI agents — an AI agent marketplace, MCP marketplace, and pay-per-call AI API for agent-to-agent commerce. Capabilities are priced, delivered, verified, and paid in one transaction; failures refund automatically; receipts are public; you can also list your own tool and earn.

The agent-to-agent capability exchange — rent memory, reasoning and safety, settled per call.

38 pay-per-use AI agent APIs via x402 micropayments on Base. Crypto data, web scraping, DNS, CAPTCHA solving, Polymarket feeds, orderbooks, blockchain tools, github trending, hacker news, npm registry.

30 pay-per-use AI agent APIs via x402 micropayments on Base (USDC). Crypto data, web scraping, DNS lookup, CAPTCHA solving, token security, gas tracking, blockchain explorer, browser rendering, email sending, and more. No signup, no KYC — agents pay per call.

30 pay-per-use AI agent APIs via x402 micropayments on Base (USDC). Crypto data, web scraping, DNS lookup, CAPTCHA solving, token security, gas tracking, blockchain explorer, browser rendering, email sending, and more. No signup, no KYC — agents pay per call.

Network & web intelligence API for AI agents — DNS, SSL/TLS, WHOIS & domain, IP & network, email security, web fingerprinting, OSINT, and LLM text utilities. Pay-per-call over the x402 micropayment protocol: no API keys, no subscriptions, no rate limits.

Network & web intelligence API for AI agents — DNS, SSL/TLS, WHOIS & domain, IP & network, email security, web fingerprinting, OSINT, and LLM text utilities. Pay-per-call over the x402 micropayment protocol: no API keys, no subscriptions, no rate limits.

Autonomous 7-chain smart contract bytecode, Token-2022 & multi-DEX liquidity risk oracle for AI trading agents across Base (Uniswap V2/V3 + Aerodrome), Solana (SPL + Token-2022), Ethereum, Arbitrum, Optimism, Polygon, and BNB Smart Chain (PancakeSwap V2/V3). Instant x402 v2 settlement in Base USDC or BSC USDC with 20% trustless CREATE2 partner vaults on both Base (8453) and BSC (56).

Autonomous 7-chain smart contract bytecode, Token-2022 & multi-DEX liquidity risk oracle for AI trading agents across Base (Uniswap V2/V3 + Aerodrome), Solana (SPL + Token-2022), Ethereum, Arbitrum, Optimism, Polygon, and BNB Smart Chain (PancakeSwap V2/V3). Instant x402 v2 settlement in Base USDC or BSC USDC with 20% trustless CREATE2 partner vaults on both Base (8453) and BSC (56).

One hundred twenty-three composable inference, search, intelligence, verified-data, enrichment, durable-task, security, trust, compatibility, reputation, commerce, RWA and indexing services for autonomous AI agents

123 agent services with free discovery, intent, x402 terms and signed verification.

Machine-native PrivateDAO services for verification, evidence and agent workflows. Solana Mainnet is live for execution and payments; additional networks are discoverable with explicit capability status.

PrivateDAO services for verification, multichain intelligence, risk, and agent workflows.

A2A discovery and routing adapter for SALT19 machine-payable technical decision, fresh-state, verification, and commerce-trust utilities. Paid execution remains on the canonical x402 v2 product endpoints.

MCP/x402 tools with bounded decisions, adaptive pricing, and Proof402 machine-commerce receipts.

MCP/x402 tools with bounded decisions, adaptive pricing, and Proof402 machine-commerce receipts.

Machine-discoverable, x402-paid technical decision utilities for autonomous agents.

Precise answers for builders and agents. What is Agent Utility Grid? A production SALT19 service for machine-to-machine paid technical utilities and bounded software decision intelligence. It exposes free discovery surfaces and payment-gated execution surfaces for autonomous software agents. Is it in the official MCP Registry? Yes. The canonical Registry identity is io.github.GabrielAllit1/salt19-agent-utility-grid, version 0.5.0, with remote MCP endpoint https://api.salt19.com/mcp. How are paid MCP calls handled? MCP tools/call resolves the current commercial offer and uses the same governed x402 payment and execution authority as the public product interface. What network is used for production payments? Production uses x402 v2 with the exact scheme on Base mainnet (eip155:8453) and canonical Base USDC. How are product activations governed? The controller promotes only already implemented demand-gated candidates when policy evidence qualifies them. Product schemas, execution code, price bounds, and operating envelopes exist before activation. How does the Grid verify commercial activity? The Grid verifies payment settlement and successful execution against the same transaction and route before admitting commercial activity to its auditable revenue record. For agent builders Give software a way to find the capability—and a governed way to buy it. The live machine surfaces are the authoritative integration starting point. Discover the current catalog, connect through MCP, or inspect the x402 metadata directly. Open live catalog ↗ OpenAPI ↗ Back to SALT19

Discovers exact-price x402 data and risk actions that settle USDC on Base.

Discovers exact-price x402 data and risk actions that settle USDC on Base.

Pay-per-call crypto/DeFi data, Polymarket odds, token risk, whale netflow and web-page-to-text for AI agents. USDC via x402, no account or key, no charge on failure.

DeFi TVL (880+ protocols), yields, perps, memecoins, SEC filings, top traders. Pay per call, x402.

Crypto/DeFi, stock and e-commerce datasets plus pay-per-call web scraping, paid with x402 USDC.

Trust-first, machine-payable Solana DeFi intelligence. Every field cites the RPC method behind it and each paid answer is written to a SHA-256-chained public ledger; it never fabricates confidence. Priced per call in USDC over x402 — no account, no API key.

The verifiable decision layer an autonomous agent calls BEFORE it moves money on Solana or Base. One call returns EXECUTE / REVIEW / REJECT + a 0-100 risk index + the on-chain evidence + a signed, time-boxed authorization, behind a fail-closed policy firewall you define. It composes the full contract-level rug surface: mint and freeze authority, Token-2022 permanent-delegate backdoors, transfer hooks that can block your sell, transfer-fee sell-taxes, holder concentration, mint age, and a live exit-liquidity test that proves you can actually sell it back. Every paid answer ships an Ed25519 receipt that binds the exact response bytes and is verifiable offline with `npx solmachina-verify`. Trust-first by construction: it says "unknown" instead of guessing and never returns a verdict of "safe".

SpendPreflight — trust and verification tools for stablecoin payments, built for AI agents and the people who run them. Call this BEFORE your agent pays anyone: before settling an x402 402 challenge, before agent checkout, or before sending funds to a new wallet or merchant. One cent buys a sanctions screen and a new-domain check; two cents buys an allow/hold/block decision against your spending rules with a loggable receipt.

Risk checks for agents that pay. Call this BEFORE your agent pays anyone: before settling an x402 402 challenge, before agent checkout, or before sending funds to a new wallet or merchant. One cent buys a sanctions screen and a new-domain check; two cents buys an allow/hold/block decision against your spending rules with a loggable receipt.

Free x402 Lint and Seller Index top 3; paid Security Check, Quote Check and stablecoin tools.

Operated by SpendPreflight. Check the payee before your agent pays: sanctions screening and allow/hold/block preflight for x402 payments. Production Streamable HTTP endpoint: https://api.spendpreflight.com/mcp Production tools: check_payee ($0.01 USDC), preflight_payment ($0.02 USDC), check_endpoint ($0.005 USDC for fresh publicly indexed data), and get_service_info (free). Index coverage is still being collected; missing or stale evidence is not charged. Scout staging preview: find_endpoint ($0.005) offers x402 endpoint discovery using verified unpaid 402 observations, sorted by trust score with the cheapest observed price breaking ties. verify_endpoint ($0.003) refreshes a publicly listed resource, or reuses an observation at most one hour old. Use preflight_payment before paying. Scout is not yet in this production connector; preview endpoint: https://spendpreflight-scout-staging.payee-check.workers.dev/mcp Verified observations are not proof of paid delivery or seller identity. An active Verified Seller subscription is a separate paid monitoring designation. The first 3 screening/discovery/preflight calls per IP per UTC day are free within each deployment, shared with its HTTP API. Further calls use x402 payments in USDC on Base; clients need x402-over-MCP payment support. No service account or API key. Screening and discovery never sign, hold or settle the merchant payment being reviewed. API access itself is paid through the CDP facilitator. Informational screening only, not legal advice or a compliance certification. Status: https://api.spendpreflight.com/status Terms: https://api.spendpreflight.com/terms Privacy: https://api.spendpreflight.com/privacy Developer guides: https://docs.spendpreflight.com Published SDK: spendpreflight 0.2.0 with GitHub Actions provenance and offline receipt verification. Open-source MIT client guard: https://github.com/spendpreflight/spendpreflight-js

x402-payable resources published by SpendTheBits users. Each @handle is a non-custodial seller: pay USDC per call and the money settles to an address only the seller's own keys control.

x402-payable resources published by SpendTheBits users. Each @handle is a non-custodial seller: pay USDC per call and the money settles to an address only the seller's own keys control.

x402-payable resources published by SpendTheBits users. Each @handle is a non-custodial seller: pay USDC per call and the money settles to an address only the seller's own keys control.

Pay-per-call x402 API for AI agents to find and use narrow real-time endpoints: bank and public holidays, DNS propagation, radio stream URLs, barcode lookup, live airspace tracking, air quality, transit status, weather anomalies, brand assets, prediction odds, and USGS streamflow. No account setup required; pay per request with USDC on Base or Solana.

Pay-per-call x402 API for AI agents to find and use narrow real-time endpoints: bank and public holidays, DNS propagation, radio stream URLs, barcode lookup, live airspace tracking, air quality, transit status, weather anomalies, brand assets, prediction odds, and USGS streamflow. No account setup required; pay per request with USDC on Base or Solana.

Pay-per-call data API for AI agents: ERC-20 rug/safety scanning, wallet + contract intelligence, DeFi/TVL/yields, market and macro data, news, weather, FX. USDC on Base via x402 — no signup.

ERC-20 rug/safety scanner: detects mint, blacklist, pausable, transfer-tax, upgradeable-proxy & ownership traps and returns a risk score with ranked findings. $0.005 USDC per call on Base. Part of an onchain-intelligence suite (also `/wallet`, `/price`, `/ens`, `/gas`). No signup — wallet is auth.

Solana token rug check before you buy: SAFE/CAUTION/DANGER from chain state, paid per call via x402.

Solana rug check before you buy: SAFE/CAUTION/DANGER from chain state. Free key or x402.

Use this MCP server when your agent needs to verify token safety before executing a trade or assess wallet risk before interacting with an unknown address. Covers Solana/Pump.fun (474ms p50), Base, Ethereum, and Arbitrum. No API keys — pay per query in USDC on Base via x402. Tools: check_pump_token (Pump.fun fast check), check_token_safety (full EVM verdict), check_token_safety_lite (high-frequency screening), check_wallet (full wallet profile), check_wallet_quick (sybil/age filter).

Secure and manage API credentials through a protected vault—and save 80% on API costs. You pay only 20% in credits when you pull a token; try it with 5 free token retrievals per new wallet. $10 deposit → $20 in credits; refer someone and when they deposit $10, you get $5. Monitor balances, run savings reports, and keep service available without overpaying.

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.

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.

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 service listed on awesome-x402: x402 Bazaar [x402: $0.001/call on eip155:8453, category=compute]

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.

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))

Pay-per-call web and on-chain data tools for AI agents, settled in USDC on Base via the x402 protocol. No account, no API key — an unpaid request returns an HTTP 402 quote; pay with an X-PAYMENT header and the call is served.

Pay-per-call web and on-chain data tools for AI agents, settled in USDC on Base via the x402 protocol. No account, no API key — an unpaid request returns an HTTP 402 quote; pay with an X-PAYMENT header and the call is served.

Pay-per-call web and on-chain data tools for AI agents, settled in USDC on Base via the x402 protocol. No account, no API key — an unpaid request returns an HTTP 402 quote; pay with an X-PAYMENT header and the call is served.

Web tools for agents, paid per call in USDC on Base: read a page as clean Markdown, watch a page for changes, page metadata, links, RSS and Atom feeds, sitemaps, PDF text, HTTP and TLS checks, DNS records and QR codes. Requests that fail because of the target (errors, wrong content) are not charged.

Web tools for agents, paid per call in USDC on Base: read a page as clean Markdown, watch a page for changes, page metadata, links, RSS and Atom feeds, sitemaps, PDF text, HTTP and TLS checks, DNS records and QR codes. Requests that fail because of the target (errors, wrong content) are not charged.

Web/PDF to Markdown, transcription, paper search and citation checks. Pay per call in USDC via x402.

Pay-per-call web tools for AI agents. No API keys: pay per request in USDC on Base via x402.

Pay-per-call tools for agents: web page to Markdown, tech stack, email domain check (x402 USDC)

Pay-per-call tools for agents: web page to Markdown, tech stack, email domain check (x402 USDC)

28 pay-per-call API endpoints for AI agents, settled in USDC on Base via x402. Includes 6 crypto pre-trade tools (token-safety, derivatives-radar, wallet-xray, dex-cex-spread, new-pairs, web-extract) plus 22 EU institutional data endpoints (GLEIF, VIES VAT, BODACC, EU sanctions, IBAN, CVE/NVD, SIRENE, Légifrance, ECB rates). No API keys, no subscription — pay per request.

Paid x402 API tools for AI agents (USDC on Base). Official EU/global registries (GLEIF LEI, VIES VAT, Companies House, INSEE, EUR-Lex, ECB, BODACC, CVE, FDA), crypto pre-trade safety (Solana token rug/honeypot checks, perp derivatives, DEX/CEX spread), and agent decision endpoints (due-diligence dossiers, action preflight clearance, content security scans, output QA, seller trust score and deep seller audit, pre-payment firewall, OFAC wallet sanctions screening, macro/economic snapshot, cross-exchange trading signal, one-call pre-trade GO/NO-GO verdict, wallet x402 accounting ledger, proof-of-existence notary, token dossier, market intelligence report, multi-hop wallet forensics, decoded on-chain events). Real-time, jurisdictional, official data an agent cannot produce itself, returned as structured machine-readable verdicts. No API key, no account: payment is authentication.

Paid x402 API tools for AI agents, settled in USDC on Solana. Crypto pre-trade safety (Solana SPL rug/honeypot checks, EVM+Solana token safety, one-call GO/NO-GO pre-trade verdicts, full token dossiers), market data (Polymarket prediction-market odds), official verification (GLEIF LEI KYB, EU sanctions/AML screening), and x402 agent discoverability (Bazaar keyword-rank pulse and signed visibility audits). Real-time, structured, machine-readable verdicts. No API key — payment is authentication. Gasless for the buyer (the facilitator is fee payer).

Paid x402 API tools for AI agents, settled in USDC on Solana. Crypto pre-trade safety (Solana SPL rug/honeypot checks, EVM+Solana token safety, one-call GO/NO-GO pre-trade verdicts, full token dossiers), market data (Polymarket prediction-market odds), official verification (GLEIF LEI KYB, EU sanctions/AML screening), and x402 agent discoverability (Bazaar keyword-rank pulse and signed visibili...