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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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915 results- Aagent.gexlog.comAI & agents
Lightweight gamma regime classification timeline. Returns regime, GEX flip, and key levels per date (max 90 days).
BasePolygonArbitrum+1agent.gexlog.comfrom $0.022 endpoints - AAgent ReadyAI & agents
Which discovery files does a site publish? Checks openapi.json, .well-known/x402, agent-card.json, mcp.json and ai-plugin.json.
BaseSolanaPolygon+1agent-ready.x402tookit.comfrom $0.033 endpoints - Xx402-stall-l3bb.onrender.comOther services
Hello from Taiwan — a signed timestamp from my first x402 stall
BaseSolanax402-stall-l3bb.onrender.comfrom $0.011 endpoint - Ssocialintel.devSocial & people
No description yet.
BaseSolanaPolygon+1socialintel.devfrom $0.011 endpoint - SScripture LookupOther services
Bible book facts: chapters, testament, order and abbreviations for one of the 66 books, or the full table (1189 chapters).
BaseSolanaPolygon+1scripture.x402tookit.comfrom $0.024 endpoints - GGiftPulseSearch & web
Search Reloadly's gift card catalog (300+ brands, 14,000+ products/denominations across countries). Returns each product's id, brand, country, denomination range or fixed amounts, and sender fee/discount — everything needed to build a POST /api/giftcard/quote call.
BaseSolanaPolygon+8giftpulse.theaslangroupllc.comfrom $0.011 endpoint - Ffiles.camelai.ioDeveloper tools
Upload a file and get a temporary signed URL. Send raw file body with Content-Type header. Returns a URL valid for 1 hour.
BasePolygonSolanafiles.camelai.iofrom $0.0011 endpoint
Fizzl BuySearch & webBuy the right paid API for your agent in one call: say what you need ("weather forecast Amsterdam tomorrow", "BTC price", "search the web for x402"). Fizzl picks the x402 service x402 Doctor has seen paying out day after day at a fair price, fills in its input, buys it (up to $0.01) and returns the answer, checked by TypeSafe Jev, with a signed receipt. Nothing is charged when no service delivers.
BaseSolanaxrpl+2buy.fizzl.eufrom $0.021 endpoint- UURL Uptime CheckerData & research
Checks whether a website or web address is currently reachable and reports how fast it responded.
BaseSolanaurl-uptime-checker.underscoredone.comfrom $0.011 endpoint - CCanadian Rates and YieldsMarkets & finance
Compare Canadian interest rates and government bond yields using the latest available Bank of Canada policy rate and six benchmark maturities. Track monetary policy, benchmark borrowing costs and compare the yield curve. Original data is available free at bankofcanada.ca.
BasePolygonArbitrum+1canada-rates.use.x402atlas.comfrom $0.011 endpoint - GGlobal Legal EntitiesSocial & people
Company name search — find Legal Entity Identifiers (LEIs), legal names, jurisdictions and registration status. Get up to ten matches per page to identify counterparties, distinguish similarly named companies and enrich company reference data.
BasePolygonArbitrum+1legal-entities.use.x402atlas.comfrom $0.011 endpoint - Iintel.hugen.tokyoCrypto & DeFi
Multi-source token due diligence — same aggregation as token-report (security checks, market data, liquidity analysis from 4+ sources) with weighted 0-100 risk scoring and red/green flags. No AI verdict prose — structured score only. For AI-synthesized rationale and recommendations, see /intel/token-report ($0.50). Accepts USDC payments on Base and Solana
BaseSolanaintel.hugen.tokyofrom $0.021 endpoint - CascadeWatchCrypto & DeFi
Liquidation cascade simulation — Morpho Blue chained-liquidation exposure
BaseSolanaEVM chain 5042cascade.lonestaroracle.xyzfrom $0.103 endpoints - SStatEdgeOther services
StatEdge ATS records — historical against-the-spread trends for specific situations and teams
BaseSolanaPolygon+8stateedge.theaslangroupllc.comfrom $0.084 endpoints - SShopify AI Rank CheckerSearch & web
Checks how well a Shopify store's products show up when AI shopping assistants such as ChatGPT, Gemini, Perplexity, Grok, and Copilot search for products, and reports the store's rank and its closest competitors. Searches Shopify's real Global Catalog - the same product index AI assistants read from.
BaseSolanashopify-ai-rank-checker.underscoredone.comfrom $0.011 endpoint - RRecurrence Rules (RRULE)Other services
Dates for every N business days, or the last or Nth business day of each month, skipping weekends and your holiday list.
BaseSolanaPolygon+1recurrence-rules.x402tookit.comfrom $0.024 endpoints - PPolymarket EventsCrypto & DeFi
Prediction market events by topic — page through open or closed Polymarket events under one tag such as politics, crypto, economy, geopolitics or ai, each with status, dates, volume, liquidity and markets with current YES prices. Use to survey what a prediction market is pricing on a subject.
BasePolygonArbitrum+1polymarket.use.x402atlas.comfrom $0.012 endpoints - MMailPulseImages, audio & video
Check the status and tracking of a physical letter previously sent via POST /api/letters. Returns render status, expected delivery date, and (for certified mail) the USPS tracking number.
BaseSolanaPolygon+8mailpulse.theaslangroupllc.comfrom $0.0052 endpoints - Mmailcheck.hugen.tokyoCrypto & DeFi
MX record lookup for any domain — returns whether mail servers exist and their hostnames sorted by priority. Verify email deliverability before sending. Supports all TLDs including ccTLDs and new gTLDs. No DNS library setup needed. Accepts USDC payments on Base and Solana
BaseSolanamailcheck.hugen.tokyofrom $0.013 endpoints
Latitude 10Social & peopleMeridian: a design system for SaaS products people use all day: admin consoles, CRMs and internal tools. Calm, neutral and precise: Manrope headlines over Inter, Meridian Teal with one Burnt Amber accent, tone rather than shadow. Each is an original design system (not a brand look-alike) in the open DESIGN.md format that Claude Code, Cursor and Codex read before building UI: DESIGN.md, W3C DTCG to
BaseSolanalatitude10.techfrom $0.101 endpoint- 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 - 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- BBulk ExportsData & research
USGS earthquakes in a date window (up to 31 days) above a minimum magnitude: time, magnitude, place, lat/lon, depth.
BaseSolanaPolygon+1bulk-exports.x402tookit.comfrom $0.504 endpoints - 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 - 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 - GadgetHumans APISocial & people
Is this Base token safe to buy, or a honeypot, rug pull or scam? Send a Base (chainID 8453) ERC-20 contract address and get a pre-trade safety verdict before you swap, snipe, route or approve it: honeypot simulation (can you actually sell it?), buy tax and sell tax, mint and owner privileges, blacklist and pause functions, verified source, holder concentration, live liquidity and 24h volume, plus
BaseSolanaapi.gadgethumans.comfrom $0.001204 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
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.