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Every pay-per-call x402 API we can find, ranked by what agents actually pay for. No accounts, no API keys.
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2,879 results- Ffoi.itsthesheet.caSearch & web
Full-text search of published British Columbia FOI release packages.
BaseSolanafoi.itsthesheet.cafrom $0.011 endpoint - DDNS & WHOIS LookupSocial & people
Send up to 10 domain names and get back every DNS record type (A, AAAA, MX, CNAME, TXT, NS, PTR, SOA, SRV, CAA, NAPTR, DS, TLSA) plus the full WHOIS registration profile (registrar, dates, contacts, status, nameservers) for each one. URLs are accepted and automatically stripped down to the bare domain. Duplicate domains are quietly removed before processing. Results come back as one flat row per d
BaseSolanadns-whois-lookup.underscoredone.comfrom $0.011 endpoint - HHALOWERK defiwerkCrypto & DeFi
Fetches live offers from a public bridge aggregator and reports for every option what arrives, what it costs in fees and gas, and how long it usually takes. The security model is given equal weight to the price: bridges are the most expensive failures this industry has, so trust_assumptions spells out who a user has to trust for that route to hold. No recommendation is forced - three best values b
Basedefi.halowerk.comfrom $0.0081 endpoint - LLocus x402 ServicesOther services
Locus public pay-per-use API
Basedeepgram.x402.paywithlocus.comfrom $0.0042 endpoints - CCurl HTTP RequestCrypto & DeFi
Send an HTTP request to any URL from our servers and receive the full response — including the status code, all response headers, and the body content. Supports GET, POST, PUT, PATCH, DELETE, and HEAD. Automatically follows up to 3 redirects. Useful for testing endpoints, verifying servers are responding correctly, debugging redirect chains, or fetching raw data without needing a local setup.
BaseSolanacurl-http-request.underscoredone.comfrom $0.011 endpoint - Xx402 Launch KitOther services
Returns a Markdown launch kit and seven-day checklist for an x402 service.
BaseSolanacrowdcode.appfrom $0.0031 endpoint
CodePulseOther servicesPackage security scanner — CVEs, license check, typosquat detection.
BaseSolanacodepulse.waltsoft.netfrom $0.0051 endpoint- CChemical equationsDeveloper tools
Given a reaction and the supplied amount of every reactant, identify the limiting reagent and compute leftover reactant and theoretical product yields.
Basechemeq.openverbs.comfrom $0.0043 endpoints - Cca-cm-kg.aiAI & agents
One paid call on ca-cm-kg.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, with an EdDSA-signed receipt that resolves forever at https://ca-cm-kg.ai/x402/receipt/{nonce}. Doctrine: https://agentic-x402.ai/.
Baseca-cm-kg.aifrom $0.011 endpoint
BytemineSocial & peopleReturn the full detected technology stack for a domain. Every technology is mapped to a category with a confidence score. Includes stack_sophistication, stack_gaps, and competing_vendors derived intelligence. Billed per domain profiled.
Basebytemine.pay.zeroclick.iofrom $0.013 endpoints
Pharos AtlasData & researchThis resource provides editorial reference material on commercial solar-control window film for the Los Angeles context. It supports topic research and preparation of questions for a qualified project reviewer. Read the returned material for its specific coverage, source context, and limitations.
Basebuildingtint.infofrom $0.011 endpoint- BbasefeedOther services
x402 settlement test
Basebasefeed-io.fly.devfrom $0.0011 endpoint - AAurifex Macro Open DataMarkets & finance
Aurifex Macro Open Data — taux 10 ans US et indice dollar large Fed (open data)
Baseaurifex.kder-ai.comfrom $0.011 endpoint - Aarn-x402-payguard-payment-security.rajdeep-dutta-in.workers.devAI & agents
Agent Reliability Network: ARN x402 PayGuard provides x402 payment security for autonomous AI agents. Check the seller before you pay with payment preflight and payment-challenge validation. Returns ALLOW, CAUTION, or BLOCK.
BaseSolanaarn-x402-payguard-payment-security.rajdeep-dutta-in.workers.devfrom $0.0011 endpoint - Aapp-446.hdgregory.comSearch & web
Scrapes a URL and returns structured JSON: title, meta tags, headings, paragraphs, links, tables, extracted emails and phone numbers, and word counts. Accepts a single 'url' or a list of 'urls' for batch scraping. Includes retry logic and anti-detection headers.
Baseapp-446.hdgregory.comfrom $0.0051 endpoint - Aapi.xona-agent.comImages, audio & video
ElevenLabs text-to-speech: convert text to speech (MP3) (Base Mainnet).
SolanaArbitrumEVM chain 1187947933+1api.xona-agent.comfrom $0.001420 endpoints - Aapi.kgninja.devOther services
KG-NINJA URL Summary
Baseapi.kgninja.devfrom $0.012 endpoints - CChat Completion (basic)Crypto & DeFi
LLM completion per call, no account and no API key: POST a prompt (or a messages array) and get the model answer as JSON. Hard caps disclosed in every response (6,000 UTF-8 bytes in, 750 tokens out on this tier). Fixed price per call, signed receipt included so the answer stays auditable. Larger tier at /x402/chat-plus.
BaseArbitrumPolygon+1api.eucompliance.toolsfrom $0.00123 endpoints
Agent PaywireSearch & webCheck whether a public URL exposes L402, x402, or MPP discovery. Send url as a query parameter. POST JSON {"url":"https://..."} is the same check. Two free reports per client per 24 hours, then 0.05 USDC. A request without url is the payment challenge and does not use a free report.
Baseapi.agentpaywire.comfrom $0.018 endpoints- Aagents.thirdmade.netSearch & web
Scrape any public web page and get clean structured JSON (title, text, meta). Pay per call with USDC on Base.
Baseagents.thirdmade.netfrom $0.011 endpoint - Aagent.agentflare.orgAI & agents
No description yet.
BaseSolanaagent.agentflare.orgfrom $0.0053 endpoints - Aagent-contract-proof.mattskowronis.workers.devAI & agents
Compare an agent's advertised contract with its live x402 challenge and return deterministic proof.
Baseagent-contract-proof.mattskowronis.workers.devfrom $0.011 endpoint - Xx402station.ioOther services
Preflight x402 scam check: endpoint risk before you pay — decoy / zombie / price-trap / never-paid? Trust verdict in ~200ms before PAYMENT-SIGNATURE.
Basex402station.iofrom $0.0011 endpoint - Xx402endpoint-924155002144.us-west2.run.appOther services
Current path for validation test
Basex402endpoint-924155002144.us-west2.run.appfrom $0.011 endpoint - Xx402.n9t2.comCrypto & DeFi
N9T2 Bridge paid service: base-xrpl-trading/book_offers
Basex402.n9t2.comfrom $0.00251 endpoint - Xx402-micro-tollgate.onrender.comOther services
Fetch a public http(s) URL and return Markdown. Pay-per-call via x402 USDC.
Basex402-micro-tollgate.onrender.comfrom $0.0011 endpoint - Xx402-market.kore-app.workers.devCrypto & DeFi
Aggregated crypto market snapshot: prices, Fear & Greed, DeFi TVL, dominance, top stable yields.
Basex402-market.kore-app.workers.devfrom $0.011 endpoint - WWikidata Entity SearchSocial & people
Wikidata entity search — find the Wikidata item for a person, organisation, place, work or concept by name or alias, in any language, with id, label, description and which term matched; or find a property by name. Use to get the Q-id before asking for an entity's facts, identifiers or links.
BasePolygonArbitrum+1wikidata.use.x402atlas.comfrom $0.011 endpoint - WWattImages, audio & video
Use when you need image embeddings or text embeddings in one 2048-dimension space for retrieval, RAG, semantic search, clustering, or dedup (Qwen3-VL-Embedding-2B, OpenAI-compatible). Batch up to 256 items per call, served 32 at a time. An x402 call is $0.002 when the request includes images, $0.001 for text-only. USDC on Base. 400 is a bad body, 413 is over 48 MiB, 429 means busy (Retry-After).
Basewatt.area21.iofrom $0.0012 endpoints - VVokkoOther services
Does 0x1111111111111111111111111111111111111111 belong to allbirds.com? Evidence, not a guarantee. $0.002.
Basevokko.eufrom $0.0012 endpoints
Service data comes from the Coinbase CDP and PayAI discovery lists and refreshes every few hours. Usage is paid calls over the last 30 days. APIs launched here are verified by us; the rest are paid directly to their owners.