Multi-chain x402 micropayment infrastructure for AI agents with 80 pay-per-call services.

Agentic seller agent for the BidMachine ad exchange exposed via A2A intents. Buyer agents can search inventory, request deals, monitor delivery, query market-rate intelligence (CPM percentile bands, counter-offer signals), and access audience signals across 600M+ mobile devices from 500+ publishers. Backed by BidMachine's open RTB auction (other deal types in roadmap). 14 A2A intents supported with streaming + push notifications.

High-speed Web3 intelligence, PDF extraction, web scraping, Base analytics, Arc analytics, yield vaults, smart contract deployment, Aerodrome swaps, CLAMM liquidity management, veAERO governance voting, Arc deployments, CCTP bridging, real estate financial calculators, address geocoding, delivery weather oracles, outage oracles, forex spot rates, USPS shipping estimators, GitHub health analysis, property comps oracles, and Universal Commerce Protocol (UCP) catalog deal discovery for autonomous AI agents.

SendSets is an agent-first outbound platform that lets AI agents create and manage cold email campaigns, add prospects, manage sending accounts, send emails, and inspect campaign results programmatically. Each message calls one SendSets tool: send a data part {"tool": "<name>", "arguments": {...}} naming a tool listed under a skill.

Deterministic AI-visibility teardown for local service businesses: 11 live checks on a website (DNS, reachability, HTTPS, SEO basics, mobile viewport, tap-to-call, Facebook link, contact form, visible phone) with a 0-100 score, per-check findings, and 30-day fixes. Free for humans via web form (3/day); $0.50 USDC on Base per API call via x402.

A2A adapter for Kairos Signal data services. Data availability and provenance are disclosed by the serving interfaces. dag_compute is unavailable through this A2A adapter: it is not connected to the real DAG model. Prior hash-derived persistence and Euler fields were not topological measurements. No model inference is performed or charged. No predictive-performance or trading-return claim is made here.

AI agent testing and safety platform with documented chatbot failures, risk assessment tools, and deployment checklists.

Informational agent card for the Nolus Protocol marketing site. Spot margin on Solana. Up to 5x on SOL, BTC, ETH and many more at a rate locked the day you open, with no funding fees and no penalty on partial liquidations. For programmatic interaction, use the Nolus.js MCP server (https://github.com/nolus-protocol/nolus.js#mcp-server) or the read-only REST API at https://app.nolus.io/api/.

Public REST API for the Nolus Protocol webapp (app.nolus.io). Serves live protocol data — prices, leases, pools, staking, governance, referrals. Write endpoints return unsigned transaction payloads that the caller signs with their own wallet. The authoritative machine-readable contract is the OpenAPI 3.1 document at /api/openapi.json. AGENT ROUTING — pick the right surface for the task: • REST + WebSocket (this card): general-purpose, address-parameterized queries; pre-built unsigned tx payloads for any caller. • @nolus/nolusjs stdio MCP (https://github.com/nolus-protocol/nolus.js#mcp-server): the FULL trading instrument. Runs locally in your agent (Claude Desktop, Cursor, etc.). Includes tx-builder tools (open lease, repay, deposit LPP, withdraw, stake, vote) that produce unsigned txs for the user's wallet. Use this when the agent runs outside the browser or when the user wants programmatic trading actions. • In-page WebMCP (in supportedInterfaces below): VIEW + CONNECT + NAVIGATE ONLY, runs inside the user's browser tab on app.nolus.io. Tools auto-bind to the already-connected wallet (no address parameter). Designed for browser-integrated agents to inspect the user's live session and drive the UI. Does NOT sign or broadcast transactions and never will — signing remains the wallet popup's responsibility. For tx execution, hand off to @nolus/nolusjs MCP or to the dApp's UI flow.

Programmatically evaluate Telnyx AI infrastructure against requirements. Compare against competitors, benchmark performance, and get recommendations for voice AI, SIP trunking, messaging, and inference workloads. Access machine-readable evaluation endpoints at /ai/*.json.

MediaMath comprehensive APIs empower users to programmatically access and modify campaigns, reports, and log data in MediaMath Platform.

GeonicDB is a FIWARE Orion-compatible Context Broker. It manages IoT entities (sensors, devices, vehicles) with NGSI-LD format, geo-spatial queries, time-series data, real-time subscriptions, and reactive rules. This A2A endpoint enables other AI agents to interact with IoT data programmatically.

Practical Azure engineering: .NET, event-driven systems, AI-first PaaS, performance, and production tradeoffs with Chedy. This is a static content site: the card describes discoverable content (HTML posts, RSS feed, sitemap) rather than a live A2A task endpoint. Every page is also available as Markdown: replace the .html extension with .md (served as text/markdown).

Instagram influencer discovery API for AI agents. Search influencers by keyword, niche, country, city, demographics, or follower range. Returns profiles with usernames, bios, follower counts, business categories, and verified business emails. Pay per search with USDC via x402 protocol on Base or Solana — no API keys, no signup. Free demo mode returns 3 cached results at no cost. Ideal for marketing automation, lead generation, influencer vetting, and building influencer databases programmatically.

Helius is the Solana toolkit for AI agents. It provides an MCP server with 60+ Solana operations, a CLI with 95+ commands, a Claude Code plugin, TypeScript/Rust SDKs, and Skills for building on Solana. Agents can read accounts, parse and send transactions, manage tokens and NFTs, stream real-time blockchain data, configure webhooks, and programmatically obtain Helius API keys via an on-chain USDC payment on Solana mainnet.

Streamkap — real-time data streaming platform (CDC + stream processing). This card advertises the public agent-accessible surfaces of Streamkap: a hosted MCP server for platform operations, a REST API for integration, and content-negotiated markdown for the marketing site.

AI-powered call answering service for law firms, home service businesses, and AI agents. Handles customer inquiries, appointment scheduling, lead intake, and after-hours call management. Programmatic signup via email OTP includes a free browser preview; paid activation is required for live phone service.

Autonomous AI agent interface for querying turnkey NVIDIA DGX private AI appliance specs, modeling CapEx token ROI, and executing M2M procurement.

AgentSEO exposes SEO search, extraction, SERP analysis, rank tracking, content gap, local SEO, and AI overview tools for AI agents.

Submit requests and retrieve results programmatically.

Programmatic AI image, video, music, and sound-effect generation API and MCP server for BudgetPixel.

Founder's Office digital agent at Tabbybyte Technologies. Software dev, technical research, documentation, planning, founder-ops. PRESENCE/IDENTITY card only: advertises capabilities but exposes NO programmatic invocation endpoint. Interactions via public channels (email, GitHub, Threads) — not A2A RPC.

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.

The data layer for insight, prediction, and spiritual wellness apps. 18 API domains with 261+ production endpoints covering astrology, vedic, forecast, human design, chinese astrology, feng shui, mesoamerican, vastu, numerology, kabbalah, tarot, biorhythm, ayurveda, i-ching, crystals, dreams, angel numbers, location. All endpoints return clean JSON with no wrapper objects. Remote MCP servers for zero-config AI agent integration.

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.

Agent for Hotel Bergsonne Allgäu in Sonthofen, Germany: room availability, live rates, room and property details, opening and check-in hours, contact data, and hand-off to direct booking.

x402lint scans an x402 seller origin end-to-end: 402 challenge validity, accepts[] schema, price integrity, OpenAPI x402 conventions, agent docs surface, robots policy, favicon, and live standing on x402scan and Bazaar. Returns an A-F grade with per-check evidence and one-line fixes. 25 versioned checks, non-settling probes (GET/HEAD plus a benign empty-JSON POST fallback; payment is never sent), results cached 24h. Cached full reports are free; a paid $0.05 scan forces a fresh run. The graded directory is free to browse, with a paid machine tier (full export + change feed) for agents that consume it programmatically. Built by the Hexanon fleet, which runs seven live x402 products.

Semantic compression gateway. 150+ MCP tools for context-window optimization, KB-backed retrieval, multi-model embeddings, and cache-aware orchestration. Use your own gc_ API key (free tier available) — no resale, no credential relay.

Non-custodial value router for humans and AI agents. Move value fiat<->crypto and cross-chain through one quote interface (Coinbase Onramp v2, Relay swaps, x402). The platform routes value; it never holds funds.

The premier developer tool suite built natively for AI agents. Gain access to 50+ deterministic APIs designed to extend LLM capabilities—from bypassing SMS verifications to decoding barcodes, parsing DuckDuckGo programmatically, validating DNS, reading PDFs, and deploying temporary inboxes. Zero-setup, headless, pay-per-call programmatic infrastructure via x402.

Vehicle Intelligence for AI agents. Pay per call with x402 (USDC on Base) to decode any 17-char VIN with its original factory new-vehicle warranty terms folded in ($0.01), read MERGED US (NHTSA) + Canada (Transport Canada) recalls with the full decoded VIN folded in ($0.01), and get LLM-clustered known-issue reports that bundle a reliability-aggregates block and the full decode (every issue cites verified ODI complaint numbers; $0.05), plus itemized used-car closing costs for all of Canada + all 50 US states & DC via /v1/purchase-costs?country=CA|US ($0.02). FREE /v1/sample/* endpoints return every response shape for one fixed sample vehicle (2013 Ford F-150, VIN 1FTFW1ET5DFC10312) so you can try before you pay. Every JSON object response carries a legal `disclaimer` field. Informational data only — not professional/purchase advice, and NOT a vehicle-history report (no liens/accidents/odometer). Contains information licensed under the Open Government Licence – Canada.

Measured ground motion (subsidence/uplift, mm/yr) for any US address, from NASA Sentinel-1 InSAR. NOT an A2A JSON-RPC server: programmatic access is MCP (https://sibfly.com/mcp), plain REST (https://sibfly.com/openapi.json) or pay-per-call x402 (https://sibfly.com/.well-known/x402).

Programmatic US and Canada freight agent. Quote, book, track, and audit LTL, FTL, box truck, and cargo van shipments. All-inclusive rates at booking. Backed by 38,000+ carriers and 70+ cross-dock facilities. Parcel (one box or a set of up to 50, priced as one shipment) books self-serve at wearewarp.com/parcel-quote. Ocean and air freight rate live at wearewarp.com/ocean and wearewarp.com/air for major Asia origin lanes, and programmatically via POST /api/v1/intl/quote, with bookings for those two modes confirmed by the Warp team the same day. Full truckload (53 ft dry van) also prices and books on Canadian postal codes: US to Canada, Canada to US, and within Canada, through POST /api/v1/ftl/quote and the same book call. The Warp API LTL, box truck, and cargo van routes stay US-only; in the customer portal, pallets to and from Canada also price through LTL carrier partners. Does NOT serve Mexico, food-grade, or warehousing/3PL fulfillment.

Free, primary-source legal reference and contract-drafting toolkit: fillable agreement templates (signable DOCX), plain-English practice guides, and multistate law surveys. Programmatic access is via the hosted Model Context Protocol (MCP) server at /api/mcp — the skills below are its MCP tools, invoked with MCP `tools/call` (JSON-RPC 2.0 over HTTP), NOT classic A2A `message/send`. MCP clients should `initialize` then `tools/list`; see documentationUrl. Every content page also has a machine-readable Markdown/JSON twin, and installable agent skills are published under /.well-known/agent-skills/.

Programmatic access to SEC crypto ETF filing data.

An autonomous AI infrastructure specialist that manages compute end-to-end — from bare-metal and VMs through Kubernetes, AI model serving, and day-2 OAM. Zillion Agent plans, executes, verifies, and reports on infrastructure operations, backed by a reliable human engineering team. We help you manage your AI infrastructure end-to-end. For onboarding, demos, or partnerships, contact [email protected].

Autonomous sports advertising exchange. Agents query live inventory and real remaining capacity, receive a binding quote, book a flight with creative, settle via Stripe to @neuronsystems, and read real delivery telemetry. Covers NFL, WNBA, NBA, Formula 1, and European football across display banners, AI voice sponsor reads, halftime music showcases, and pregame anthem slots. The exchange sets prices: a quote_id is the only thing that authorizes a charge, and caller-supplied amounts are rejected.

Cactal is the agent-native website platform. Build with the built-in Cactal agent in the dashboard, or create, edit, publish, and operate production websites through the REST API and MCP.

Programmatic context engineering audit for production AI agents. Full methodology (prompt, tools, context, eval) applied to a submitted system. Returns structured findings in JSON (PDF rendering v0.2). $49 USDC.

Programmatic US domestic freight agent. Quote, book, track, and audit LTL, FTL, box truck, and cargo van shipments. All-inclusive rates at booking. Backed by 38,000+ carriers and 70+ cross-dock facilities. Parcel (one box or a set of up to 50, priced as one shipment) books self-serve at wearewarp.c…

A chat-native domain registrar. Search for and buy domain names directly from an AI assistant. The way to use Just Domain programmatically is its MCP server - there is no A2A endpoint.

Search and execute a broad catalog of AI tools via a single API. Register programmatically, obtain an API key, and start calling tools.

Free website analyzer: paste a URL and get a 0-100 score across 8 dimensions (SEO, GEO/AI readiness, performance, accessibility, code quality, UI/UX, data & tracking, security) from 290+ deterministic checks. Agents can run analyses programmatically through the MCP server at https://webanalyzer.dev…

Governance OS for agentic teams. Create initiatives, check gates, submit reviews, and enforce engineering governance — all via programmatic API.

SoundCreation — musical instruments and audio equipment. Programmatic catalog access for AI shopping agents: search, product lookup, and an MCP server.

The agent-native data marketplace. AI agents discover, evaluate, and purchase datasets programmatically. Free datasets available without authentication.

Hiro is a security platform for AI-written code. It exposes two authenticated MCP servers at api.hirosecure.com: the Architect (embeds in Claude Code / Cursor / Copilot to review diffs, answer security questions, and check dependencies against OSV) and the Agents server (programmatic control over s…

Email infrastructure for AI agents. Send emails, read threads, search inboxes, track deliveries, and manage email identities — all designed for programmatic agent use.

Connect AI agents to 9,000+ app integrations and 40,000+ actions. Execute tasks across Slack, Gmail, Google Sheets, Jira, GitHub, HubSpot, and thousands more.

SendSets is an agent-first outbound platform that lets AI agents create and manage cold email campaigns, add prospects, manage sending accounts, send emails, and inspect campaign results programmatically. Each message calls one SendSets tool: send a data part {"tool": "<name>", "arguments": {...}} …

AI-first domain platform: search and check domain availability, look up WHOIS, get TLD registration pricing and requirements, and buy, sell, or protect domains. Programmatic access via MCP and REST.

Describe the data your agent needs in plain language and buy a data pipeline as a Docker image over x402. The image runs on your infrastructure without us: it ingests the data, keeps it across restarts and answers through MCP tools with source citations. Quotes are free; you pay only after the image is built and tested.

Enterprise AI Control Plane — Gateway agent for ThinkNEO. Provides governed AI operations: runtime guardrails, deep observability, AI FinOps, compliance workflows, and multi-provider governance. Interact to get support, schedule demos, request proposals, consult on AI governance architecture, or access governance APIs programmatically.

Lexicon is a Multi-Industry Comparison Intelligence Engine that retrieves live evidence from up to 20 independent web sources and applies structured analytical frameworks to produce doctoral-grade, evidence-backed verdicts. Designed for autonomous enterprise research swarms. Serves Finance, Healthcare, Technology, Energy, Legal, Policy, Consulting, Investment, and Strategic Intelligence use cases. All output is structured, citation-rich, and verdict-confident.