x402 paid APIs: MCP servers, A2A agents and x402 APIs

Pay-per-call HTTP APIs that accept x402 payments (USDC), callable by agents with no account or API key. 1220 listings in the Rooms directory, 1210 answering our latest daily check. Each one links to its endpoint, how to call it and its live status.

Palmyr Live MCP
Agent infra: email, phone, social, domains, VPS, wallets. Paid per-action via x402, no API key.
MCP server · ai.palmyr · 33 tools · check 80/100
SentEdge Idea Machine Live MCP
Buy adversarially-debated AI product ideas over x402: $0.10 pulls, $1 buyouts, USDC on Base.
MCP server · ai.sentedge · 7 tools · check 80/100
x711io - universal gas station market and intelligence Live MCP
Pay-per-call tool API for autonomous agents. x402 payments on Base. 27 tools including web search, price feeds, and The Hive shared memory layer.
MCP server · ramboweb3 · check 55/100
Address Validator Live MCP
Valide une adresse de livraison : normalisation, geocodage, score de livrabilite. x402.
MCP server · io.github.Kder974
Agent Bazaar Live MCP
Open, permissionless discovery marketplace for x402-payable resources. No account or KYC required.
MCP server · io.github.SaylorInnovations
Agent Decision & Evidence Tools (MCP + x402) Live MCP
40 MCP tools: multi-chain RPC, market and transaction decisions, AI, EU compliance and US imports
MCP server · io.github.PatrickPi1312
Agent Discovery Board by SarnAI Live MCP
Free directory to find AI agents: search MCP servers and x402 services, then connect, pay, verify.
MCP server · dev.sarnai
Agent Vending Factory Live MCP
Pay-per-call MCP tools via x402 USDC: ZAR prices, data extraction, Python sandbox, SA flights.
MCP server · io.github.RubenTay
Agent402.Tools: pay-per-call web tools Live MCP
Agentic Finance: 500+ agent tools, multi-chain USDC over x402 or MPP, or free via proof-of-work
MCP server · io.github.MikeyPetrillo
AgentEconomy Compliance API Live MCP
Paid KYC, AML, and regulatory risk assessment over MCP via x402 USDC micropayments on Base.
MCP server · io.github.Piwe
AgentNDX Live MCP
Search and discover MCP servers, A2A agents, and x402-enabled services. The agentic web's directory — add `https://agentndx.ai/mcp` to your MCP client to search 59+ servers by name, category, or capability. Pay $0.005 U…
MCP server · jl-3044
AgentPay — Pay-per-call AI Microservices Live MCP
34 pay-per-call AI microservices via x402, USDC on Base, no API keys.
MCP server · help.agentpay
Amalgix Document Intelligence Live MCP
Cross-model evidence pipeline for financial filing and contract intelligence. Two core paid workflows — analyze_public_filing (SEC 10-K/10-Q/20-F, ticker/CIK lookup, metrics, risk changes, contradictions) and review_con…
MCP server · amalgix
ANAMIZED Desk Live MCP
Agent floor and MCP market: catalog, rack, Stripe checkout, x402, A2A.
MCP server · io.github.ANAMIZED
Anyway Possible Agent Utilities Live MCP
A free tool recommender plus eight x402 tools for payments, merchants, wallets, and web evidence.
MCP server · com.anywaypossible
Anyway Possible Paid Agent Utilities Live MCP
Paid x402 tools for merchant intelligence, Base payment readiness, and verifiable web evidence.
MCP server · io.github.anyway-possible
Axiom Agentic Tools Live MCP
x402-paid Base agent tools (USDC). 5 deterministic tools. No API keys. No NFT pass.
MCP server · io.github.0xAxiom
Baron Power Play Live MCP
Pay-per-call AI infra for agents: DeFi market data, LLM inference, STT/TTS. x402 v2, USDC on Base.
MCP server · io.github.MintMachineHQ
Coin Railz (travis-kellogg1) Live MCP
63 x402 micropayment services via USDC — crypto analytics, trading signals, NASA/ESA satellite data, IoT sensors, AI inference, and prediction markets. Coinbase AgentKit compatible. Pay per call with prepaid credits or…
MCP server · travis-kellogg1
Council of AI GSPC Live MCP
19 tools (14 free, 5 x402-metered): GSPC board, evidence, Ed25519 card verify. Measurement only.
MCP server · ai.councilof
CrossingKey MCP Live MCP
Agent-native MCP for governed commerce, x402 payments, paid capabilities, and verifiable receipts.
MCP server · com.crossingkeyintelligence
CryptoPulse Data API Live MCP
Pay-per-call crypto market intelligence for AI agents. USDC on Base via x402.
MCP server · ai.saascloud
Dayze — Life Context Live MCP
Life context for agents: get_context_pack + public notable packs. x402 + OAuth.
MCP server · com.dayze
DCL Trust Oracle — AI/LLM Output Audit (x402 MCP) Live MCP
AI/LLM agent output audit MCP: policy eval, tamper-evident chain, AI safety, x402 USDC on Base.
MCP server · com.fronesislabs
GadgetHumans API Hub Live MCP
47 MCP tools free (rate-limited) + x402 pay-per-call on Base. Flagship: Token Verdict, $0.02.
MCP server · com.gadgethumans
Gapup MCP — 270+ Agent-payable AI Tools Live MCP
270+ agent-payable C-suite expertises (competitive intel, SEC filings, sanctions multi-jurisdiction, KYC, pentest scope, clinical evidence GRADE-graded, real-estate deals EU-first, ESG, NAICS classifier, patent landscap…
MCP server · getgapup
GateCheck by LarryBuildsAI Live MCP
One-cent x402 and MCP readiness checks plus fixed-price marketplace launch packs.
MCP server · io.github.LarryLemonBot
Genesis402 by UnyKorn (x402 pay-per-call) Live MCP
Counterparty checks, sanctions screening, company lookup and 360+ pay-per-call APIs over x402.
MCP server · io.github.FTHTrading
iAeternum Live MCP
Intelligence Aeternum — AI training dataset marketplace with 100,000+ museum artwork images with 4K token .json metadata. Search, preview, and purchase curated art datasets with provenance tracking. Powered by x402 USDC…
MCP server · metavolve-labs
Ichimoku Signal Live MCP
Free Ichimoku trend; paid confluence, levels, market scan and liquidity-ranked setups via x402.
MCP server · io.github.Fizzl13
Income Factory Toll Fabric Live MCP
Eight metered machine-intelligence tools for AI agents with native x402 payment paths.
MCP server · io.github.DataPunterAU
JarvisClaw — AI Gateway & API Marketplace Live MCP
320 AI models + 2,720 pay-per-call APIs. x402 USDC on Base or Solana, no API key.
MCP server · io.github.api-jarvisclaw
Kifly — Agentic Commerce & Payments Live MCP
Multi-seller shopping for AI agents. Settle via Stripe MPP or x402 USDC on Base. Hosted.
MCP server · ai.kifly
Lead Enrichment API Live MCP
Curated EU AI/Sec/DevTools/Fintech B2B leads, Claude-scored. MCP+x402. Free 250/mo.
MCP server · io.github.Compuute
Liquid Agent Live MCP
Money tools for AI agents over x402: USDC bridge to 16 chains, Polymarket data, stocks, USDC gas.
MCP server · ai.liquidagent.api
Lumière PayCheck Live MCP
Check any x402 endpoint before your AI agent pays it: trust grade, verdict, and hijack checks.
MCP server · io.github.Book0fEli
mainstreet Live MCP
Onchain AI-agent reputation oracle on Base. Get a 0-100 score + SAFE/CAUTION/BLOCK verdict for any Base wallet, agent, token deployer, or x402 endpoint in <100ms — EIP-712 signed and verifiable onchain against the MainS…
MCP server · philpof102
Maxwell Directory (x402 + MCP) Live MCP
Local providers worldwide, plus travel and public data. Free search; paid answers via x402.
MCP server · ai.maxwellinternational
Neuronto Payments: x402 facilitator and API gateway Live MCP
Put any API behind x402 in one call, settle USDC on Base, buy credits, find paid resources
MCP server · com.neuronto
NEXUS Intelligence API Live MCP
58-endpoint utility hub - DNS lookup, web scraping, CVE scanning, AI translation, PII detection, domain health audit, company intelligence. Pay per call via x402 on Base.
MCP server · rileycraig14
Ontario Protocol Live MCP
Free x402 readiness/can-pay and Bazaar buyer-task checks; signed provider passports cost 2.00 USDC.
MCP server · com.ontarioprotocol
ParaSure Live MCP
AI-native parametric insurance infrastructure. Live weather risk assessment via x402 (USDC on Solana). Full quote, bind, and settle protocol loop available in sandbox; live carrier integration in progress.
MCP server · brendan
Popdot AI Live MCP
Rent verified subdomains by the hour, day, or month. Free 24h trials, x402 USDC on Base.
MCP server · ai.popdot
Quiet Menders Live MCP
Privacy clinic + pay-per-call data APIs for AI agents via x402. Never pays or touches keys.
MCP server · com.brianbooms
Recall Kitchen Live MCP
US recalls MCP: free API key/signup or x402 $0.025 Base; some tools need key; verify↑limits
MCP server · io.github.adamdecaf
revnuvo-mcp Live MCP
Revnuvo MCP server for the agent economy. Tools: verify domains, resolve DNS, assess domain trust/risk, register agents, create tasks, submit results, verify task outputs, and get agent reputation leaderboard. The canon…
MCP server · tijaniismael62
SAP MCP Server Live MCP
Solana-native MCP gateway for SAP, DeFi tools, SNS identity, and x402 payments.
MCP server · ai.oobeprotocol.sap.mcp
Sato Hub: Onchain Agents Live MCP
Search scored onchain-agent tooling: frameworks, MCP servers, wallets, x402 rails, deploy specs.
MCP server · ai.satohub

Related capabilities

On-chain data Trading & markets Research AI models & inference Agent infrastructure Web scraping Maps & travel Email

How to use one

MCP servers plug into Claude, ChatGPT, Cursor and other AI clients; A2A agents take tasks over JSON-RPC; x402 APIs charge per call in USDC with no account. Guides: A2A vs MCP · How to call an A2A agent · x402 for agents.

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