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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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- Paid calls · 30 days
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Search & web
367 results- Mmarket-resolutionSearch & web
Did it happen? Check whether a prediction market event has settled on Polymarket or Kalshi and get the resolved outcome, resolution time, source and market URL. A cheap oracle for agents that must verify a real-world outcome before acting.
Basex402.fenixfoundry.comfrom $0.0033 endpoints - Wwindtrapdata.devSearch & web
x402 endpoint validator, uptime probe, and crawled directory index of working x402 Bazaar APIs ($0.001 USDC) — Audits HTTP 402 PAYMENT-REQUIRED headers and returns verified working x402 services.
Basewindtrapdata.devfrom $0.0015 endpoints - AAgentic ReservationsSearch & web
Restaurant recommendations from the Blackbird network (~2,000 curated restaurants, mostly NYC and San Francisco). Full-text search plus city/neighborhood filters, with complete specials on every result, refreshed daily from a cache (never a live call) — e.g. every West Village restaurant with its current Fly-reward offers in one call.
BaseSolanaagentres.devfrom $0.014 endpoints - SSpecies and BiodiversitySearch & web
Parse a scientific name into genus, species epithet, subspecies or variety, authorship and year, and check capitalisation.
BaseSolanaPolygon+1biodiversity.x402tookit.comfrom $0.028 endpoints - LLicense IntelSearch & web
Check a list of license ids against SPDX: current, deprecated or unknown, with the modern GNU -only / -or-later form.
BaseSolanaPolygon+1license-intel.x402tookit.comfrom $0.029 endpoints
WebberSites x402 Data APISearch & webFetch any public web page and return clean, readable Markdown with navigation, ads, and boilerplate stripped. For agents that need article text or documentation as Markdown.
Basex402-data-api.onrender.comfrom $0.0012 endpoints- DDataForAgentsSearch & web
DataForAgents — Steam catalog search for agents (name, genre, price filters)
Basedataforagents.netfrom $0.013 endpoints - SSWARMSearch & web
SWARM Site Check - Website uptime and link check in one call: is a URL up, its HTTP status, final URL after redirects, response time and TLS/certificate errors. Use when an agent monitors sites on a schedule, verifies a link or domain is reachable before scraping or citing it, or needs to detect a non-200 answer or a broken redirect. Requires `url`. Instant, no AI. $0.002.
Baseswarm-agent.netfrom $0.0026 endpoints - Xx402aiSearch & web
Convert text into a 768-dimension embedding vector (nomic-embed-text) for semantic search, RAG retrieval, clustering, deduplication or similarity scoring. POST JSON {"input": string}, up to 3000 characters; returns {embedding: number[768], model, dimensions, elapsed_ms}. One text per call; English works best.
Baseapi.x402ai.devfrom $0.013 endpoints
Geo402Search & webGeo web fetch for AI agents. Fetch any public web page from a residential IP in a chosen country (190+ countries, optional city or US state) as clean markdown, text or HTML, with the product price/currency/availability extracted automatically when the page has product data. $0.005 per page, only charged when the page loads. Respects robots.txt; no CAPTCHA solving; sign-in, payment and email servic
Basegeo402.comfrom $0.0043 endpoints- Mmechamanda.comSearch & web
Search for upcoming concerts. Supports city, date range, genre, and artist filtering.
Basemechamanda.comfrom $0.014 endpoints - Xx402 Market IntelligenceSearch & web
Competition check for an x402 idea: sellers, hosts, price range and how many have real buyers. Open space or crowded?
BaseSolanaPolygon+1x402-meta.x402tookit.comfrom $0.029 endpoints
x402 SEO AuditSearch & webAI and search visibility check for any live URL. Loads the page as Googlebot, Bingbot, OAI-SearchBot, PerplexityBot, GPTBot, ClaudeBot, CCBot and a browser, and flags JSON, empty or blocked pages served to crawlers. Checks robots.txt per bot, sitemap, llms.txt, noindex, text visible without JavaScript, tags, and how many pages Google shows. Returns the top 3 fixes in plain words.
Baseseo.cyberwarex.comfrom $0.021 endpoint- MMedical Codes and Drug NamesSearch & web
Match a misspelled or branded drug name to RxNorm: best candidates with RxCUI identifiers, names and match scores.
BaseSolanaPolygon+1medical-codes.x402tookit.comfrom $0.028 endpoints - Sskill-auditSearch & web
Resolve a domain's DNS records (A/AAAA/MX/NS/TXT/CNAME) and flag basic email/security posture
Baseeltociear-skill-audit.hf.spacefrom $0.0055 endpoints - SSingapore ACRA Company RegistrySearch & web
Search Singapore MOE schools by name or postal code (optional level filter). Results include the school directory joined with subjects offered, CCAs, MOE programmes and distinctive programmes.
Basedata.finery.ccfrom $0.0052 endpoints - Ddata.japanagent.devSearch & web
Company name search across jurisdictions. jurisdiction=lei searches the global GLEIF LEI database (all countries); jurisdiction=jp searches the official Japan National Tax Agency corporate registry. Returns registered legal names, identifiers, and addresses. KYB / counterparty verification primitive.
Basedata.japanagent.devfrom $0.0023 endpoints - Sstreamsage.newsSearch & web
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Basestreamsage.newsfrom $0.011 endpoint - GGEDX402 SearchSearch & web
Tavily web search — POST { query, max_results?: 5 } on search.gedx402.com; ranked results via Tavily API. $0.042 USDC per request. AM-winning shape at /v1/search. Agent search: tavily, web search, serp, search lite, semantic search.
BasePolygonArbitrum+2search.gedx402.comfrom $0.016 endpoints - Bbanking-compliance-production.up.railway.appSearch & web
Search the federal banking compliance rules database. 56 rules across Reg DD, Reg Z, UDAAP, ECOA, BSA/AML, and more.
Basebanking-compliance-production.up.railway.appfrom $0.0031 endpoint - UUS Regulations PipelineSearch & web
US federal regulations in the pipeline — documents on public inspection at the Federal Register, filed by agencies and scheduled to publish, with type, agencies, filing time and the scheduled date. Use to see tomorrow's rules, notices and executive orders before they are published.
BasePolygonArbitrum+1us-regulations.use.x402atlas.comfrom $0.0055 endpoints - KKeenableSearch & web
Keenable web search for AI agents: ranked results with title, URL and snippet for a natural-language or keyword query. Pay per request, no API key.
Baseapi.keenable.aifrom $0.013 endpoints - VVIA API CompareSearch & web
Compare APIs and software services. Returns one recommendation plus up to three alternatives.
Basevia-router.floot.appfrom $0.017 endpoints - PPolicyPulseSearch & web
Federal Register search, deterministic. Answers "new SEC rules on stablecoins", "is there an open comment period on AI", "when does this rule take effect". Full-text search over every US federal rule, proposed rule and notice, with effective dates, comment deadlines and docket ids — or mode=open-comments for comment periods closing soonest. Typed documents straight off the official API. No LLM, no
BaseSolanaPolygon+8policypulse.theaslangroupllc.comfrom $0.0212 endpoints - Nnatur.halowerk.comSearch & web
Returns a single earthquake in decision-ready form, either by its USGS event identifier or as the most significant event matching a search. Magnitude is reported with the magnitude type, because moment magnitude and local magnitude are not interchangeable at the edges of their ranges.
Basenatur.halowerk.comfrom $0.0046 endpoints - Aapi.genesistokenlabs.comSearch & web
Use when an agent needs any web page as clean LLM-ready markdown (no ads, nav, or scripts) for RAG, research, or summarizing. Example input: GET /x402/v1/web-extract?url=https://example.com/article. Example output: {"url":"https://example.com/article","title":"…","markdown":"# Title\n\nBody text…","wordCount":812}
BaseEthereumArbitrum+3api.genesistokenlabs.comfrom $0.0015 endpoints - GGDELT Global News IntelligenceSearch & web
Global news article search by GDELT — normalized fulltext search across worldwide media (query syntax: phrases, OR, sourcecountry, theme, tone) returned as a clean snake_case envelope.
BasePolygonArbitrum+1gdelt.use.x402atlas.comfrom $0.0052 endpoints - VVIN Decoder (NHTSA vPIC)Search & web
Decode a VIN into make, model, model year and vehicle attributes using NHTSA vPIC. Use when an agent has a VIN and needs structured vehicle information. Call GET ?vin= or POST JSON {"vin"}; full or partial VINs, decode errors preserved. No owner lookup.
Basefoundry-par007-machine-revenue-mainnet.inference-chip-index.workers.devfrom $0.0034 endpoints - EEarthquake IntelligenceSearch & web
Recent earthquakes — search newest-first USGS seismic events by rolling time window and minimum magnitude, with revision, freshness, and provenance.
BasePolygonArbitrum+1earthquakes.use.x402atlas.comfrom $0.0052 endpoints
Useful Work toolsSearch & webCheck up to 15 links on a public web page and report which are broken
Basetools.usefulwork.appfrom $0.0023 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.