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.

Agent Verification Utility (KG-NINJA) Live A2A
A stateless synchronous A2A adapter that validates a prechecked paid intent, creates or reuses a quote bound to its receipt digest and spend policy, and returns exact x402 and MCP purchase instructions as a direct Messa…
A2A agent · KG-NINJA · 1 skill
Agent Zero Live A2A
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-cha…
A2A agent · Agent Zero · 12 skills
Agent402 Site Audit Discovery Live A2A
Free, static product discovery for two existing x402 products on eip155:8453: the 5.00 USDC AI Discovery Site Audit and the 1.00 USDC Verified URL Evidence Snapshot. Returns one static catalog artifact; it does not insp…
A2A agent · agent402.dev · 2 skills
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
agent.api.0x.org Live x402
Get the indicative price for a swap using Allowance Holder to set allowances
x402 paid API · 1 endpoint
agent.apiguru.app Live x402
Live Amazon offer and inventory data for up to 10 ASINs: every active offer with seller, price, shipping and condition, which one holds the buy box, and optionally the real purchasable stock quantity. Built for repricin…
x402 paid API · 10 endpoints
agent.atinamos.co.uk Live x402
Deterministic JSON validation and conservative repair for AI-agent payloads. Repairs unquoted object keys, single-quoted strings, trailing commas, Markdown code fences, UTF-8 BOMs and JSON-compatible Python literals, in…
x402 paid API · 1 endpoint
agentbodega.store Live x402
Check GitHub's official status source for current incidents, component health, and scheduled maintenance before an agent retries, deploys, or escalates. (7 paid endpoints on agentbodega.store.)
x402 paid API · 7 endpoints
agentcheck-kohl.vercel.app Live x402
AgentCheck: independent report on an x402 seller before you pay it. Are its buyers real (repeat wallets on their own money) or funded by the seller itself, measured from 30 days of on-chain payments, plus results of our…
x402 paid API · 3 endpoints
agent.connskill.com Live x402
Keyword demand check for up to 1000 chosen terms: search volume, CPC, advertising competition and available monthly history from Google Ads data. Advertising competition is not organic SEO difficulty. (22 paid endpoints…
x402 paid API · 12 endpoints
agentcrush.xyz Live x402
Verification and tier status for an AI agent on AgentCrush. Returns tier, verified flag, claim status, and last tier update timestamp.
x402 paid API · 1 endpoint
agentdata-api.sander-van-aard.workers.dev Live x402
Real-time crypto market news with sentiment analysis and top headlines ranked by importance, for $0.01 per call. One request, no parameters needed — get the latest market-moving stories as structured JSON, ready for tra…
x402 paid API · 12 endpoints
agentdataapi.onrender.com Live x402
Upcoming SpaceX launches (next 5) with mission, pad, and T-0 details (4 paid endpoints on agentdataapi.onrender.com.)
x402 paid API · 4 endpoints
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
agente.revenuerecoveryai.app Live x402
Classify text into categories you define, with a 0-1 score per category. Single-label or multi-label. Clasifica texto en las categorías que tú definas, con puntuación de 0 a 1 por categoría. Admite una sola etiqueta o m…
x402 paid API · 12 endpoints
agentfeeds.jp Live x402
Freshness heartbeat only (list date, address count, fetched_at) for both Japan MOF and OFAC sanctions lists. No addresses. Cheapest polling entry point for change-detection loops. (13 paid endpoints on api.agentfeeds.jp…
x402 paid API · 12 endpoints
agentforge-taupe.vercel.app Live x402
Payment flow verification for agents integrating x402: confirms your wallet and payment channel work before you spend on a real endpoint. Category: infra. (19 paid endpoints on agentforge-taupe.vercel.app.)
x402 paid API · 12 endpoints
agentfund.net Live x402
SEC Full-Text Filing Search (3 paid endpoints on x402.agentfund.net.)
x402 paid API · 3 endpoints
agentic-coverage.ai Live x402
One paid call on agentic-coverage.ai for $0.01 USDC: the surface's own statement of record (a market node: its list_nodes line; a product: its record of record; allooloo.io: the estate scale block), public-record only,…
x402 paid API · 1 endpoint
agentic-reservations.vercel.app Live x402
Book a paid Resy reservation for the authenticated user using a slot config token. (2 paid endpoints on agentic-reservations.vercel.app.)
x402 paid API · 2 endpoints
agentic-trades.ai Live x402
One Capital Markets Record for $0.01 USDC — a listed issuer's identity, registry identifiers, aliases, listing, disclosure events, auditor and transfer agent, each field sourced to the public filing, served from the nod…
x402 paid API · 2 endpoints
agentic-x402.ai Live x402
Allooloo Capital Markets estate index for $0.01 USDC: every market node (Canada, United Kingdom, United States, Germany, France, Netherlands, Switzerland, Australia, Singapore, Japan, South Korea), issuer and disclosure…
x402 paid API · 1 endpoint
agenticfinancegraph.com Live x402
Where I pay: Counterparties, 30-day USD, rail split, idle flag, top-counterparty share. Computed from the free agent record, delivered as one dated, citable file with its receipt. About one ERC-8004 agent on Base, by Ag…
x402 paid API · 12 endpoints
agentindex.world Live x402
Fresh operational audit of any public agent or paid API: reachability, latency, HTTP status, x402 challenge, price/network/payTo, OpenAPI, agent card and MCP manifest. Returns a 0-100 score, verdict and issues. Try GET…
x402 paid API · 12 endpoints
agent.kihustle.tech Live x402
Fast deterministic check that a public URL is alive: HTTP status, redirects, content-type, size, and title. Built for agent workflows before paying for deeper crawls. (3 paid endpoints on agent.kihustle.tech.)
x402 paid API · 3 endpoints
agentline.cloud Live x402
AgentLine gives AI agents real US phone numbers, inbound/outbound voice calls, AI receptionists, transcripts, inbound SMS and live phone events. Use REST or MCP without signup: recharge and save agent_token. This endpoi…
x402 paid API · 1 endpoint
agent.massive.com Live x402
Get the most recent news articles relating to a stock ticker symbol, including a summary of the article and a link to the original source. Can't find what you're looking for? POST feedback to /feedback, no charge. (19 p…
x402 paid API · 12 endpoints
agent.memoryapi.org Live x402
Look up an ERC-8004 AI agent identity on Base mainnet. Returns name, description, services, x402 support, and owner. (3 paid endpoints on agent.memoryapi.org.)
x402 paid API · 3 endpoints
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
agentnewsstand.com Live x402
Latest SEC filings for an equity symbol (2 paid endpoints on api.agentnewsstand.com.)
x402 paid API · 2 endpoints
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
AgentRank (Crest Deployment Systems LLC) Live A2A
Settlement-grounded reputation for AI agents. Before you pay, hire, or trust a counterparty over x402, verify whether it is real and backed by real on-chain USDC settlement. AgentRank returns a 0-1000 score that is a re…
A2A agent · Crest Deployment Systems LLC · 3 skills
agentreader.dev Live x402
DNS lookup over Cloudflare DoH: query A, AAAA, CNAME, MX, NS, TXT, SOA, SRV, CAA or PTR records for any domain and get structured JSON answers with TTLs. Useful for domain research, email validation and infrastructure c…
x402 paid API · 8 endpoints
agentreadiness.halowerk.com Live x402
Publisher discovery audit fetches current public evidence from the supplied target and evaluates the documented criterion. It returns the observation, threshold, verdict, exact evidence source, limitations and a mode-sp…
x402 paid API · 12 endpoints
agents.alphaquantlabs.ai Live x402
AQL PropertyCheck full report for one City of Gold Coast or Brisbane City address: the property and what surrounds it, with a source and status on every fact. Coverage is checked before any charge. Not a valuation.
x402 paid API · 1 endpoint
agents.daedalusdevelopmentgroup.com Live x402
DDG agent-payable service request (248 paid endpoints on agents.daedalusdevelopmentgroup.com.)
x402 paid API · 12 endpoints
agents.datamancer.io Live x402
VIN decode (x402; 402 first, $0.005, Base then Solana)
x402 paid API · 1 endpoint
agents.dyoeway.org Live x402
Check whether a website, business, or wallet is a scam before an agent trusts or pays it — fraud, phishing and rug-risk screening. Returns verdict (safe/caution/avoid), trust_score, domain age, red_flags. Input: ?target…
x402 paid API · 12 endpoints
agents.forwardlane.com Live x402
Searches repository names and properties. Returns a paginated envelope with items, total, page, page_size, and total_pages, sorted by composite score. (25 paid endpoints on agents.forwardlane.com.)
x402 paid API · 12 endpoints
agents.machina.gg Live x402
Resolves a provider id (api_football, sportradar, opta, entain, espn) or canonical machina URN to the entity it identifies, with all cross-provider ids attached. (31 paid endpoints on agents.machina.gg.)
x402 paid API · 12 endpoints
agents.nibiashara.biz Live x402
Official FX rate — one African pair. Official reference rate vs USD for one of KES, NGN, GHS, TZS, UGX, ZAR, EGP, RWF, via Frankfurter (frankfurter.dev). Frankfurter blends published central-bank reference rates; the nu…
x402 paid API · 3 endpoints
agents.samedaydesk.com Live x402
Extract a public HTTP(S) page into JSON: title, description, JSON-LD, Open Graph, headings, links, and AI-readiness signals. No JavaScript; 12-second timeout; 3 MB cap. Paid JSON keeps requestedUrl, finalUrl, status, so…
x402 paid API · 3 endpoints
agents.supremeai.ca Live x402
Look up a GitHub repository: stars, forks, open issues, primary language, license, default branch, topics, and last push time. One call, structured JSON. For open-source vetting, competitive analysis, and tracking proje…
x402 paid API · 3 endpoints
agents.thirdmade.net Live x402
Scrape any public web page and get clean structured JSON (title, text, meta). Pay per call with USDC on Base.
x402 paid API · 1 endpoint
agents.x402stock.xyz Live x402
The daily US Treasury par yield curve (Constant Maturity Treasury rates) for every maturity from 1 month to 30 years, in percent. Defaults to the latest published day; pass `?limit=` for more recent days (max 250) and `…
x402 paid API · 12 endpoints
agenttoll.app Live x402
Base gas price check: the current gas price and latest block number; add ?gasLimit=150000 to also get what a transaction that size costs in ETH and USD (15 paid endpoints on agenttoll.app.)
x402 paid API · 12 endpoints
agentum.lat Live x402
Mesmo dado do /taxas-brasil (Selic, CDI, dólar comercial) — rota técnica liquidada pelo Facilitador CDP da Coinbase, só pra indexação no Bazaar/agentic.market. Não é um produto novo. (5 paid endpoints on agentum.lat.)
x402 paid API · 5 endpoints
agentwholesale.vercel.app Live x402
Search the live web for current information. Returns fresh structured organic search results with titles, URLs, snippets, domains, and ranks for agent research and retrieval. (2 paid endpoints on agentwholesale.vercel.a…
x402 paid API · 2 endpoints

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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