x402watch

52,953 paid endpoints are listed. 27,123 answered a real 402 at the last check.

Every x402 endpoint on the Coinbase Bazaar and x402scan, probed unpaid every six hours. A listing tells you the price a seller wrote down. This tells you whether the endpoint is reachable, whether it charges what it declared, and how fast it answers. Ranked by an assay score out of 100.

Last check 2026-10-05 06:00 UTC · 52,953 probed

27,123 answering 40219,794 down5,154 rejecting882 no paywall1,829 price drift
  1. 95api.munition.io/v1/exa/find-similarMunition Exa Find Similar: x402-paid similar-page discovery for AI agents. Pay 0.01 USDC to get up to 25 pages semantically similar to a given URL (competitors, related articles, alternatives), with optional page contents.$0.01 Base550 ms2 payers100% up
  2. 95api.munition.io/v1/exa/answerMunition Exa Answer: x402-paid cited answers for AI agents. Pay 0.01 USDC to get a direct answer to a question grounded in live web search, with the source pages as citations.$0.01 Base558 ms2 payers100% up
  3. 95api.aventtech.com/validate/isinValidate an ISIN securities identifier (ISO 6166) and check whether it is valid. Verifies structure and the Luhn check digit and extracts the country code and NSIN. Instant ISIN validation and verification for stocks, bonds and financial instruments.$0.01 Base695 ms2 payers100% up
  4. 95api.aventtech.com/validate/isbnISBN validation: ISBN-10 and ISBN-13 check digits, with automatic ISBN-10 to ISBN-13 conversion for valid inputs.$0.01 Base459 ms2 payers100% up
  5. 95api.aventtech.com/validate/ibanValidate an IBAN and check whether a bank account number is valid. Verifies the ISO 13616 MOD-97 checksum, structure and country length against the IBAN registry, and returns validity, the country, the BBAN and a formatted IBAN. Instant, deterministic bank account number validation and verification for any European or international IBAN.$0.01 Base536 ms2 payers100% up
  6. 95api.aventtech.com/validate/gtinGTIN / EAN / UPC barcode check-digit validation (GS1 mod-10) for GTIN-8/12/13/14 with type identification.$0.01 Base496 ms2 payers100% up
  7. 95api.aventtech.com/validate/cardValidate a credit card or payment card number and detect its brand. Checks the Luhn checksum and identifies Visa, Mastercard, Amex, Discover, Diners or JCB, returning the BIN and last four digits. Structural card number validation for checkout forms and fraud pre-checks (does not verify the card exists or has funds).$0.01 Base374 ms2 payers100% up
  8. 95api.aventtech.com/parse/useragentUser-agent string parsing: browser, engine, OS, device type/vendor/model, CPU architecture, plus a likely-bot flag. For agents analyzing logs or adapting responses per client.$0.01 Base479 ms2 payers100% up
  9. 95api.aventtech.com/net/cidrIPv4 CIDR calculator: network, broadcast, netmask, wildcard, usable host range and count, plus optional contains-IP membership check.$0.01 Base446 ms2 payers100% up
  10. 95api.aventtech.com/convert/timeTimezone conversion between IANA zones: convert a datetime (or now) from one zone to another, returning UTC instant and local wall times.$0.01 Base389 ms2 payers100% up
  11. 95api.aventtech.com/convert/currencyConvert an amount between currencies and get the exchange rate. Converts between 30+ currencies (USD, EUR, GBP, JPY and more) using daily European Central Bank reference rates with cross-rate calculation, returning the converted amount, the rate and the rate date. Fast currency converter and FX rate lookup for pricing, invoicing and reporting (informational use).$0.01 Base429 ms2 payers100% up
  12. 95agent-research-api.onrender.com/v1/token-briefTokenBrief: Analyze a Base ERC-20 address with block-linked supply, owner/proxy observations and Uniswap v2/v3 + Aerodrome Slipstream pools (USDC/WETH). Returns spot quotes, pool inventory and evidence; wallet checkout and PNG cards at /tokenbrief. Optional narration=ai adds OpenAI commentary; default rules. No security verdict, holder concentration or sellability test. Cache up to 60s, disclosed. Source or AI failures are not settled.$0.01 Base488 ms2 payers100% up
  13. 95x402.spendthebits.com/x402/giftcards/quote/Buy a gift card from ~550 US brands (Amazon, Target, DoorDash, Uber ...) and more countries; the card is issued to the agent's owner (registered STB agent key with gift cards turned on required). This call prices one card for a $0.02 USDC fee on Base and returns the exact USDC total, a pay_url and a claim token. Find product ids and amounts with GET /x402/giftcards/catalog/?country=USA.$0.02 Base305 ms2 payers100% up
  14. 95api.blockscout.com/services/bens/api/v1/protocolsAccess to bens/api/v1/protocols. Get list of supported protocols$0.015 Base387 ms2 payers100% up
  15. 95gateway-wallet-payments.jerryrnapier.workers.dev/api/agent/v1/services/website-quick-checkOne-page objective website metadata check; no AI analysis.$0.05 Base402 ms2 payers100% up
  16. 95imagegen.coinopai.com/presetsList the transform presets for /transform: 58 identity-preserving image-to-image recipes (action figure, pet royalty, CEO portrait, cartoon villain, fantasy poster, storybook hero, pet astronaut and more) with id, title, tagline and whether each expects a person or a pet photo. Static JSON, answers in milliseconds. Spend $0.005 here before spending $0.75 on a transform.$0.005 Base331 ms2 payers100% up
  17. 95api.k8s-dev.blockscout.com/:chain_id/api/v2/transactionsAccess to api/v2/transactions. List blockchain transactions with filtering options for status, type, and method$0.002 eip155:11142220662 ms2 payers100% up
  18. 95formwerk.halowerk.com/v1/pruef/formwerk/label/skriptPrüft am Objekt skript den Befund vorhandene Feldbeschriftung.$0.001 Base673 ms2 payers100% up
  19. 95gateway.gmfarcaster.com/v1/shoutoutRequest an On-Air Shoutout read on the GM Farcaster livestream$5.00 Base461 ms2 payers100% up
  20. 95agent-research-api.onrender.com/v1/companyResearchPi: Get an evidence-backed company profile from its official domain, reading at most 3 pages. Uses matching Organization data or a site brand corroborated by its page title; these are distinguished from verified legal identity. Returns cited name and description, links, missing fields and conflicts. Does not estimate revenue, funding or headcount.$0.06 Base458 ms2 payers100% up
  21. 95agent-research-api.onrender.com/v1/readResearchPi: Extract readable text, title and links from one public HTTPS HTML page. Source URL and retrieval time included. No JavaScript, PDF, login or private network access. Maximum 2 MB HTML / 60,000 text characters.$0.005 Base458 ms2 payers100% up
  22. 95agent.connskill.com/v1/local-businessesBusiness listings around a coordinate: name, category, address, phone, website, rating — lead lists for local outreach$0.05 Base590 ms2 payers100% up
  23. 95agent.connskill.com/v1/keyword-gapKeywords two domains BOTH rank for, with each position — the competitive overlap$0.05 Base615 ms2 payers100% up
  24. 95chainverdict.xyz/v1/validate/lei/:leiValidate a Legal Entity Identifier against ISO 17442: 20 characters, allowed character set and mod-97 check digits. Structural only — no GLEIF registry lookup, so it does not confirm the LEI is issued or active.$0.002 Base350 ms2 payers100% up
  25. 95agent.connskill.com/v1/page-auditInstant technical audit of ONE page: OnPage score, meta, timings and failed checks — no crawl, seconds instead of minutes$0.03 Base566 ms2 payers100% up
  26. 95agent.connskill.com/v1/backlinks-reportBacklink profile of a domain: summary metrics plus top 25 referring domains$0.15 Base607 ms2 payers100% up
  27. 95api.ishtar.numetal.xyz/api/chat/askAsk Ishtar — pay-per-answer AI dating & relationship coaching for agents. POST a question, get one candid, chaperoned coaching answer.$0.10 Base560 ms2 payers100% up
  28. 95orbylon.com/api/scan/fullAgent Readiness Scan, full report: runs all 16 checks against a domain and returns the complete machine-readable results synchronously, plus a hosted report URL.$0.05 Base540 ms2 payers100% up
  29. 95signal.keelbase.io/api/v1/daily/latestComplete latest daily Keelbase Signal records and full synthesis.$0.03 Base709 ms2 payers100% up
  30. 95fetchharbor.benlab.download/html-to-mdConvert a supplied HTML string into deterministic, LLM-ready Markdown. Preserves headings, links, lists, emphasis, and code without fetching a URL or invoking an AI model. Input is bounded to 2,000,000 characters.$0.005 Base971 ms2 payers100% up
  31. 95fetchdelta.com/api/resolveResolve a public page into clean markdown for autonomous agents, with a machine-readable upgrade to a 30-day daily watch.$0.002 Base644 ms2 payers100% up
  32. 95api.trustsource.cc/headersAudit a site's HTTP security headers before embedding, scraping, or trusting it. Returns an A+ to F grade and 0–100 score with structured analysis of HSTS, CSP, X-Frame-Options, X-Content-Type-Options, Referrer-Policy, Permissions-Policy, and Cross-Origin headers, plus server-header disclosure. A defense-in-depth signal for agents reviewing a site's security posture — not a vulnerability scan.$0.003 Base780 ms2 payers100% up
  33. 95hmo.payapi.market/hmo-checkUK HMO licence check by postcode and house number. Returns whether the property is a licensed House in Multiple Occupation.$0.02 Base724 ms2 payers100% up
  34. 95intel.halowerk.com/v1/intel/alertsLiefert bis zu 200 Alarme seit einem optionalen ISO-Zeitpunkt. Die verifizierte Zahleradresse ist der Eigentümer; Ergebnisse und gespeicherte Daten sind strikt auf diesen Zahler begrenzt.$0.001 Base968 ms2 payers100% up
  35. 95vendsdk.com/api/v/domain-intelOne payment: DNS + TLS cert + RDAP WHOIS + HTTP HEAD for brand protection and security agents$0.015 Base496 ms2 payers100% up
  36. 95liquita-x402-edge.liquita.workers.dev/v1/leaderboardLiquidation execution leaderboard. Top liquidators by tx count, profit, and protocols hit. Useful for MEV searcher competitive intel and bot benchmarking.$0.005 Base732 ms2 payers100% up
  37. 95app.heinrichstech.com/v1/cdp/chain/erc20-balanceERC-20 token balance for any wallet — USDC, USDT, DAI, or any token contract — via balanceOf eth_call, with decimals applied. Ethereum or Base mainnet. Pay 0.003 USDC.$0.003 Base434 ms2 payers100% up
  38. 95agenttoll.app/api/briefMarket brief in one call: prices (BTC, ETH and SOL by default, or ?symbols=eth,degen), Base gas, and market sentiment$0.005 Base768 ms2 payers100% up
  39. 95agenttoll.app/api/trendingTrending token scan: the tokens moving across the crypto market right now; ?limit=N trims the list$0.002 Base825 ms2 payers100% up
  40. 95fda-iom-api.canvas-cart.workers.dev/section/:id/fullFull text of one section of the FDA Investigations Operations Manual (IOM). Get the id from GET /search?q=<keywords> or GET /chapter/:id. Use this when you need the complete, verbatim text of a specific IOM section for inspection-readiness or regulatory research, not a summary.$0.01 Base532 ms2 payers100% up
  41. 95tensorfeed.ai/api/premium/ai-cves/ai-stack-cvesAI-stack CVE intelligence. Filters fresh security disclosures to vendors and products in the AI inference, agent framework, training, vector DB, model gateway, and MCP tool layers. Each paper carries a tf_ai_category tag and a severity_rank, sorted with exploited-in-wild and critical-severity first. 99.8% of underlying data is from GitHub Security Advisories (CC BY 4.0).$0.02 Base526 ms2 payers100% up
  42. 95tensorfeed.ai/api/premium/inference-providers/arbitrageCross-provider arbitrage analytics for hosted inference. Per-model: cheapest_paid, most_expensive_paid, spread_usd, savings_pct, median_paid_blended, fastest_tps, cheapest_with_tps, free_tier_offers. Plus provider_rollup (cheapest_count, top_tps_count, value_score 0-100) and top_arbitrage models sorted by savings_pct desc. Pairs with the free /api/inference-providers matrix. The "where to migrate workloads" call.$0.02 Base533 ms2 payers100% up
  43. 95palmyr.ai/domainsPalmyr: GET /domains$0.01 Base317 ms2 payers100% up
  44. 95fiatdock.com/s/svc_b799f98d-63dd-4674-bc0b-a83e1eaadccdPay-per-call: US federal business-day calendar$0.01 Base604 ms2 payers100% up
  45. 95fiatdock.com/s/svc_5817e1dc-9739-47f5-989c-77f0d8bab515Pay-per-call: Hyperliquid Open Interest + Funding$0.01 Base796 ms2 payers100% up
  46. 95functions.miniup.app/caller-e2e-x402/stateCaller E2E - x402: $0.001 Base787 ms2 payers100% up
  47. 95walletintel.waltsoft.net/v1/scanCrypto wallet intelligence — risk scoring, sanctions screening, chain analysis, and narrative reports for any wallet address.$0.50 Base491 ms2 payers100% up
  48. 95searchpulse.waltsoft.net/v1/searchGrounded web search: question → answer + citations, powered by Bedrock Web Search.$0.25 Base530 ms2 payers100% up
  49. 95costpulse.waltsoft.net/v1/cheapestCross-region AWS price comparison. Find the cheapest region for any service in one API call.$0.01 Base508 ms2 payers100% up
  50. 95modelprices.xyz/llm/prices/watsonxIBM watsonx pricing table: per-token cost of every AI model IBM watsonx serves, in one call — input, output, cache and batch USD per 1M tokens, ranked cheapest first, with context window and capability flags joined in. Compare LLM token cost inside IBM watsonx and against other providers hosting the same model. Normalized from public sources, cross-checked, refreshed hourly.$0.01 Base681 ms2 payers100% up
  51. 95agents.daedalusdevelopmentgroup.com/v1/privacy/redactDDG agent-payable service request$0.005 Base604 ms2 payers100% up
  52. 95soren.com/v1/web/searchLive web search ($0.01)$0.01 Base517 ms2 payers100% up
  53. 95soren.com/v1/chain/codeIs this address a contract, and how big ($0.002)$0.002 Base509 ms2 payers100% up
  54. 95agents.daedalusdevelopmentgroup.com/v1/research-reportDDG agent-payable service request$0.01 Base414 ms2 payers100% up
  55. 95blockrun.ai/api/v1/pm/polymarket/orderbooksGet historical orderbook snapshots for a token$0.0085 Base367 ms2 payers100% up
  56. 95financial-analyst.ai/xirr/computeCompute XIRR and MOIC from irregular cash flows with exact dates. Standard for private equity, real estate, and venture return calculations.$0.25 Base498 ms2 payers100% up
  57. 95soren.com/v1/coord/sessionDistributed locks, semaphores, shared rate-limit buckets and monotonic counters for multi- agent fleets. Use it when nine agents share one upstream API quota, or ten workers must not process the same job twice. Buy an operation budget once, then every call runs at ordinary HTTP latency instead of waiting on settlement. Tiers: 100 ops $0.05, 1000 $0.25, 5000 $1.00. Renew and release are always free. Every acquire returns a fencing token: a TTL lock alone is not mutual exclusion.$0.25 Base315 ms2 payers100% up
  58. 95agents.daedalusdevelopmentgroup.com/v1/enrich/emailZero-key enrichment from free public APIs (DNS, SSL cert, CT subdomains, email validation, Gravatar).$0.005 Base310 ms2 payers100% up
  59. 95agents.daedalusdevelopmentgroup.com/v1/enrich/domainZero-key enrichment from free public APIs (DNS, SSL cert, CT subdomains, email validation, Gravatar).$0.005 Base320 ms2 payers100% up
  60. 95modelprices.xyz/llm/prices/anthropicAnthropic pricing table: per-token cost of every AI model Anthropic serves, in one call — input, output, cache and batch USD per 1M tokens, ranked cheapest first, with context window and capability flags joined in. Compare LLM token cost inside Anthropic and against other providers hosting the same model. Normalized from public sources, cross-checked, refreshed hourly.$0.01 Base445 ms2 payers100% up
  61. 95modelprices.xyz/llm/pricesCompare AI model prices side-by-side: a live price leaderboard of LLM token cost for GPT-5, Claude 5, Claude Sonnet, Gemini 3 Pro, Llama 4, DeepSeek V4, Grok 4, Mistral Large and 2,000+ more models across 70+ providers (OpenAI, Anthropic, Google, Meta, xAI). Inference cost per token — input, output, cache and batch USD per 1M tokens — ranked, normalized into one table, cross-checked across two sources, refreshed hourly. Find the cheapest model and estimate token budgets.$0.02 Base465 ms2 payers100% up
  62. 95agents.daedalusdevelopmentgroup.com/v1/wake/feedDDG agent-payable service request$0.001 Base445 ms2 payers100% up
  63. 95agents.daedalusdevelopmentgroup.com/v1/robot-task/scope-and-revocation-auditAudit a ROS2/robot config for unrevoked authority, missing TTLs, over-broad topic grants (wildcards), and authority that outlives the task. Flags delegation tha$0.01 Base425 ms2 payers100% up
  64. 95agents.daedalusdevelopmentgroup.com/v1/agent-registryDDG agent-payable service request$0.01 Base620 ms2 payers100% up
  65. 95agents.daedalusdevelopmentgroup.com/v1/reputation/scoreSeller reputation grade A-F from E10 probe history: ok-rate, payTo stability, verdict counts. Fail-closed: 'unprobed' if no data. $0.01.$0.01 Base554 ms2 payers100% up
  66. 95agents.daedalusdevelopmentgroup.com/v1/reputation/leaderboardDDG agent-payable service request$0.01 Base626 ms2 payers100% up
  67. 95agents.daedalusdevelopmentgroup.com/v1/reputation/alertDDG agent-payable service request$0.01 Base536 ms2 payers100% up
  68. 95agents.daedalusdevelopmentgroup.com/v1/certify/verify-remoteFetch a .tine from a URL, certify it and compare expect_sha256 before paying ($0.01).$0.01 Base721 ms2 payers100% up
  69. 95agents.daedalusdevelopmentgroup.com/v1/ethereum/rpcDDG agent-payable service request$0.01 Base516 ms2 payers100% up
  70. 95agents.daedalusdevelopmentgroup.com/v1/trust/checkPre-flight probe of an x402 endpoint -> signed trust verdict.$0.01 Base672 ms2 payers100% up
  71. 95agents.daedalusdevelopmentgroup.com/v1/tine-diff-explainExplain an OpenTine diff with a bounded model-generated failure analysis.$0.01 Base432 ms2 payers100% up
  72. 95agents.daedalusdevelopmentgroup.com/v1/site-audit/reviewedDDG agent-payable service request$0.01 Base494 ms2 payers100% up
  73. 95agents.daedalusdevelopmentgroup.com/v1/secret-leak-api-key-scanDDG agent-payable service request$0.01 Base524 ms2 payers100% up
  74. 95agents.daedalusdevelopmentgroup.com/v1/sandboxed-cli-agent-runDDG agent-payable service request$0.01 Base541 ms2 payers100% up
  75. 95agents.daedalusdevelopmentgroup.com/v1/research-packPaid operator-queued DDG service: paid_research_pack$0.01 Base612 ms2 payers100% up
  76. 95agents.daedalusdevelopmentgroup.com/v1/repo-context-packDDG agent-payable service request$0.01 Base515 ms2 payers100% up
  77. 95agents.daedalusdevelopmentgroup.com/v1/lead-packDDG agent-payable service request$0.01 Base480 ms2 payers100% up
  78. 95agents.daedalusdevelopmentgroup.com/v1/ai-agent-buyer-service-bundleDDG agent-payable service request$0.01 Base548 ms2 payers100% up
  79. 95agents.daedalusdevelopmentgroup.com/v1/agent-tool-schema-repairPaid operator-queued DDG service: agent_tool_schema_repair$0.01 Base448 ms2 payers100% up
  80. 95agents.daedalusdevelopmentgroup.com/v1/agent-supply-chain-baselineDDG agent-payable service request$0.01 Base402 ms2 payers100% up
  81. 95agents.daedalusdevelopmentgroup.com/v1/agent-service-distribution-packDDG agent-payable service request$0.01 Base433 ms2 payers100% up
  82. 95agents.daedalusdevelopmentgroup.com/v1/agent-readiness-scorecardPaid operator-queued DDG service: agent_readiness_scorecard$0.01 Base375 ms2 payers100% up
  83. 95agents.daedalusdevelopmentgroup.com/v1/agent-payment-readiness-auditDDG agent-payable service request$0.01 Base393 ms2 payers100% up
  84. 95agents.daedalusdevelopmentgroup.com/v1/agent-marketplace-listing-packDDG agent-payable service request$0.01 Base418 ms2 payers100% up
  85. 95agents.daedalusdevelopmentgroup.com/v1/agent-discovery-packDDG agent-payable service request$0.01 Base374 ms2 payers100% up
  86. 95agents.daedalusdevelopmentgroup.com/v1/http-headersDDG agent-payable service request$0.001 Base457 ms2 payers100% up
  87. 95agents.daedalusdevelopmentgroup.com/v1/dns-lookupDDG agent-payable service request$0.001 Base379 ms2 payers100% up
  88. 95agents.daedalusdevelopmentgroup.com/v1/uuid-generateDDG agent-payable service request$0.001 Base470 ms2 payers100% up
  89. 95agents.daedalusdevelopmentgroup.com/v1/timestampGet current time in multiple formats: Unix, ISO 8601, RFC 3339, human-readable$0.001 Base366 ms2 payers100% up
  90. 95agents.daedalusdevelopmentgroup.com/v1/price-feedDDG agent-payable service request$0.001 Base467 ms2 payers100% up
  91. 95agents.daedalusdevelopmentgroup.com/v1/ip-geolocationDDG agent-payable service request$0.001 Base604 ms2 payers100% up
  92. 95agents.daedalusdevelopmentgroup.com/v1/fetch-as-markdownExtract clean markdown from any URL$0.002 Base673 ms2 payers100% up
  93. 95agents.daedalusdevelopmentgroup.com/v1/run-proofDDG agent-payable service request$0.002 Base423 ms2 payers100% up
  94. 95agents.daedalusdevelopmentgroup.com/v1/threat-checkDDG agent-payable service request$0.005 Base661 ms2 payers100% up
  95. 95agents.daedalusdevelopmentgroup.com/v1/subdomain-enumerateDDG agent-payable service request$0.005 Base512 ms2 payers100% up
  96. 95agents.daedalusdevelopmentgroup.com/v1/screenshotDDG agent-payable service request$0.005 Base615 ms2 payers100% up
  97. 95agents.daedalusdevelopmentgroup.com/v1/fx-rateGet the latest foreign-exchange rate for a currency pair.$0.01 Base454 ms2 payers100% up
  98. 95agents.daedalusdevelopmentgroup.com/v1/credential-escrow-proxyDDG agent-payable service request$0.01 Base403 ms2 payers100% up
  99. 95agents.daedalusdevelopmentgroup.com/v1/commodity-priceDDG agent-payable service request$0.01 Base358 ms2 payers100% up
  100. 95agents.daedalusdevelopmentgroup.com/v1/test-runnerDDG agent-payable service request$0.01 Base366 ms2 payers100% up