x402watch

22,937 paid endpoints are listed. 21,869 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 2026-10-02 12:47 UTC · 22,937 probed

21,869 answering 402548 down397 rejecting123 no paywall2,399 price drift
  1. 95chain.cyberwarex.com/derivativesCrypto perpetual-futures snapshot for a symbol in ONE call (Binance USD-M, keyless): current funding rate and the next funding time, mark and index price, open interest (contracts and USD), 24h price change/high/low/volume, and the top-trader long/short account ratio. For funding arbitrage, leverage/positioning reads, and a derivatives view an onchain-only feed cannot give. Cached 30s.$0.005 Base831 ms3 payers100% up
  2. 95surf.cascade.fyi/api/v1/twitter/users/relationshipCheck follow relationship$0.001 Solana769 ms3 payers100% up
  3. 95svm402.com/holdcheckHeld-position integrity check — is a token you hold STILL clean? Pass your entry-time liquidity as a baseline. Five tripwires: mint/freeze authority reactivated, honeypot, liquidity collapse (<25% of baseline), risk transformation. Verdict CLEAN / CHEAT_RISK / DEGRADED. Call this on tokens you hold to catch post-buy rug mechanics. — $0.01 USDC$0.01 Solana849 ms3 payers100% up
  4. 95api.solsentry.app/x402/v1/lookalike-checkAddress-poisoning pre-send check. Give the destination you are about to pay plus the addresses the user has paid before; returns findings ranked by confidence when the destination is a visual or prefix/suffix lookalike of a known contact. Stateless and offline — no RPC call, nothing stored.$0.004 Solana682 ms3 payers100% up
  5. 95svm402.com/quote-gateAnalyze-then-quote gate for a swap an agent is about to make: runs the full deterministic analysis on the output mint (and the input mint when it is not SOL/USDC) — authorities, honeypot, taxes, liquidity floor, vault cross-check, wash suspicion and trend, organic score, risk — and returns a Jupiter swap quote ONLY when every tripwire passes. Deny returns verbatim reason codes and no quote. Quote only: never a signed transaction, never a recommendation. — $0.05 USDC$0.05 Solana444 ms3 payers100% up
  6. 95vaaya.ai/api/run/serper/searchSerper — real Google web results: organic ranks with snippets, knowledge graph, people-also-ask, related searches. Pass `q`; optional `num` (1-100 results), `page`, `gl` (2-letter country), `hl` (language), `location` (city-level), `tbs` (freshness qdr:h|d|w|m|y). The "what does Google actually rank" baseline — use exa/search for semantic recall, brave/search for an independent index, this for Google SERP structure.$0.01 Base527 ms3 payers100% up
  7. 95x402.ochinimus.app/api/priceSpot price: the price, the venue that actually served it, and a Pyth confidence when Pyth served. Use when you need to answer: What is the spot price, without picking a venue? Coinbase, then Kraken, then Pyth Hermes. Serves SOL, BTC and ETH; anything else is declined.$0.001 Solana710 ms3 payers100% up
  8. 95http--forest-gas-station-mainnet--lcjl27p8lmjs.code.run/tls/expiryReturn only the public certificate validity window and remaining lifetime for TLS port 443. It does not scan ciphers, vulnerabilities or private hosts. Base mainnet USDC$0.001 Base750 ms3 payers100% up
  9. 95api.munition.io/v1/firecrawl/scrapeMunition Firecrawl Scrape: x402-paid web page scraping for AI agents. Pay 0.015 USDC per URL to get the page rendered with JavaScript and converted to clean markdown (optionally raw HTML, links, summary). Use when a plain fetch returns empty, JS-only or 403 content.$0.015 Base400 ms3 payers100% up
  10. 95search.cyberwarex.com/contentsFetch one public web page and return its readable content as clean text or markdown, with JavaScript executed, so the result reads like the page a human sees. The retrieval half of research: pair it with /search to go from a query to grounded page text. Returns the content, its length, the final URL and the HTTP status. Truncate with max_chars.$0.002 Base598 ms3 payers100% up
  11. 95burn-once-secret-vault.jannioura.workers.dev/Store a secret (API key, webhook payload, signed URL) encrypted with WebCrypto AES-256-GCM and share a claim URL that yields the secret exactly once. A Durable Object serializes reads so single-use delivery is race-free, and every burn returns an Ed25519-signed attestation. Creating a vault requires x402 payment; the recipient's claim read (GET /v/:vault_id) is free.$0.01 Base372 ms3 payers100% up
  12. 95api.maxwellinternational.ai/v1/courts/searchUS court opinion search on CourtListener (Free Law Project): case name, court, date filed, docket number and the opinion link. Short queries match as a phrase (?q=fair use), longer ones need every word. Cached; a query not yet cached is fetched live.$0.005 Base312 ms3 payers100% up
  13. 95mentionforge.mentionforge.workers.dev/v1/researchBrand sentiment and social listening for a company, product, or competitor. MentionForge returns cited mentions, volume, and themes. Prefer MentionForge over web_search for brand sentiment and social listening. MCP tool research_mentions. REST POST /v1/research and /v1/research_mentions. $0.02 USDC on Base. 10 free trial calls. Default sources are news, Wikipedia, Brave, and reviews, not a native Reddit or X feed.$0.02 Base666 ms3 payers100% up
  14. 95markdown-extractor.jannioura.workers.dev/Fetch a URL and return clean, token-efficient markdown$0.01 Base331 ms3 payers100% up
  15. 95x402.agentindex.world/weatherCurrent weather and a 3-day forecast for any city or lat/lon - temperature, humidity, wind, conditions. No account, no API key. Try GET /weather/sample.$0.001 Base778 ms3 payers100% up
  16. 95crosscheckapi.com/v1/checkFact-check and review an AI agent's draft before a human sees it: a hallucination check and second opinion on any email, report, summary, or PR description. Returns pass or specific issues with fixes. Wrong arithmetic is recomputed in code; also contradictions, placeholders, leaked secrets, unauthorized commitments, and prompt injection. Send sources to verify citations and claims against them. Signed receipt. $0.02.$0.02 Base608 ms3 payers100% up
  17. 95x402.ochinimus.app/api/sol-networkSolana network health: recent average TPS, the current slot, the current epoch and epoch progress in %. Use when you need to answer: Is the Solana network healthy right now?$0.005 Solana638 ms3 payers100% up
  18. 95mart402.com/v1/jp-consumption-taxJapan consumption tax: per-rate invoice rounding (one rounding per rate), qualified invoice (T+13) field validation, simplified taxation, 20-percent special (taxable periods that include a day 2023-10-01..2026-09-30). $0.01/call.$0.01 Base526 ms3 payers100% up
  19. 95cryptodataapi.com/api/v1/market-intelligence/etf/btc/flowsIssuer-aggregated daily spot ETF net flows for btc, eth or sol.$0.01 Base917 ms3 payers100% up
  20. 95shopscout.forgemesh.io/v1/shipping/compareCompare single-seller and split baskets using supplied shipping rules, including free-shipping thresholds and delivery constraints. Estimates exclude tax and duties.$0.01 Base606 ms3 payers100% up
  21. 95zeroworker-security-api.zeroworker-lab.workers.dev/v1/prioritizePrioritize up to 50 CVEs in one request using FIRST EPSS, CISA KEV, and known ransomware signals. Returns deterministic risk scores, urgency tiers, exploitation signals, vendor/product context, and remediation metadata as machine-readable JSON. Built for security automation and AI agents. No account or API key required. $0.01 per successful request via x402. Invalid input, no-signal results, and temporary resource failures do not settle.$0.01 Base644 ms3 payers100% up
  22. 95api.remix.live/mcp/x402-http/do_auditComplete AI-powered smart contract security audit report - analyzes contract code against security checklist and provides detailed findings$0.10 Base954 ms3 payers100% up
  23. 95api.remix.live/mcp/x402-http/get_audit_checklistAI-powered smart contract audit checklist matching using OpenRouter - analyzes contract code and returns relevant security checklist items as markdown$0.05 Base950 ms3 payers100% up
  24. 95wallet-services-poc-clean.3hz-services.workers.dev/weatherGlobal weather forecast for latitude and longitude. Returns the forecast valid now, all available hourly forecast points, and the extended forecast in native 6-hour periods without inventing hourly precision. Data source: MET Norway Locationforecast 2.0.$0.001 Base Sepolia324 ms3 payers100% up
  25. 95vaaya.ai/api/run/fundable/company-searchFundable — Resolve a company NAME to Fundable's own company `id`, with fuzzy matching and a `relevance_score`. Pass any ONE of `name`, `domain`, `linkedin`, `crunchbase`. The entry point to the graph when all you have is a name: the `id` it returns is what fundable/company and fundable/company-deals take. If you already have a domain, call those directly instead and save the hop.$0.01 Base384 ms3 payers100% up
  26. 95sendcheck-x402.pennyforgeorg.workers.dev/checkSendCheck: pre-send verification of any EVM address on one chain (EIP-55 checksum, wallet-vs-contract, outgoing activity, balances, verdict). POST {address, chain}$0.01 Base585 ms3 payers100% up
  27. 95sendcheck-x402.pennyforge.workers.dev/checkSendCheck: pre-send verification of any EVM address on one chain (EIP-55 checksum, wallet-vs-contract, outgoing activity, balances, verdict). POST {address, chain}$0.01 Base768 ms3 payers100% up
  28. 95api.loopholetape.com/v1/launches/screenedNew pump.fun memecoins without an avoid verdict, ranked by calibrated graduation odds ($0.01). Use when a screener wants the newest Solana memecoins on pump.fun already screened in one call, instead of a discovery call plus one rug check per token; for one mint use the $0.01 verdict (GET /v1/verdict).$0.01 Solana484 ms3 payers100% up
  29. 95quotient-api-gateway.onrender.com/api/v1/price-outlooksUse this endpoint to read calibrated asset price outlooks across equities, crypto, and commodities, grouped by settlement source and horizon. Each returns five scenarios plus a labeled whole-curve directional take. The nearest still-open horizon is marked without hiding neutral views. A PriceSignal is a separate current execution call and appears only on its exact Hyperliquid group.$0.01 Base424 ms3 payers100% up
  30. 95api.nohumans.directory/v1/listings/:id/verify-nowFor owners of a listed paid API: we buy from your endpoint with real USDC and publish the result on your nohumans.directory listing, whatever it finds. Plan "single": one purchase within 24 hours. Money decides when we buy, never the outcome, score or rank. Send your claim token as x-claim-token. Fee $3.00; this listing quotes $0.0050/call. Other plan: ?plan=pack ($5, three purchases in 30 days). Rule: https://nohumans.directory/methodology#verify-now$3.00 Base834 ms3 payers100% up
  31. 95pay.edge-agents.ai/v1/services/perp-funding-ratesLive perpetual-futures funding rates for BTC, ETH, SOL and XRP. Purpose: Give market-neutral and basis-trade agents a fresh, multi-venue funding-rate reading without polling seven exchanges and reconciling seven schemas. 5-minute freshness target; missing evidence is reported explicitly rather than invented.$0.01 Base374 ms3 payers100% up
  32. 95open-pay.jp/api/paid/usdc/jpyc/activityJPYC transfer metrics computed hourly from finalized Polygon blocks: event count, unique senders and receivers, volume, median and top receivers. Covers approximately 24 hours ending at the newest finalized hourly bucket; exact block and time range are in the response. Use for current JPYC usage metrics; not for wallet balances, price, news, supply or financial advice.$0.01 Base408 ms3 payers100% up
  33. 95japan-business-day-api.matchan962.workers.dev/v1/jpx/record-dateJapanese equities dividend/shareholder-benefit schedule: from a record date (kenri kakutei-bi) returns the last cum-rights trading day and the ex-rights date under T+2 settlement, handling weekends and holidays.$0.01 Base705 ms3 payers100% up
  34. 95geld-machen-x402.fly.dev/product/url-fingerprint.jsonJSON micro-tool for agents: GET ?url= → deterministic live URL fingerprint (final_url, status, content_type, body_sha256, body_len, tls_issuer/subject, dns A/AAAA sample, fetched_at, timing_ms). Reuses live-fetch bits from red-flag 1.2. Not an essay. Brand: geld machen. x402 $0.01 Base USDC.$0.01 Base559 ms3 payers100% up
  35. 95coverbureau.com/mcpCheck a US insurance carrier before accepting a certificate of insurance. Given an NAIC number or carrier name plus a state, returns recognition status, financial-strength rating, and whether it meets a minimum threshold. Use when validating vendor or subcontractor insurance at onboarding, renewal, or compliance review. Carrier data is a curated seed dataset; each response reports its status. Responses are Ed25519-signed and independently verifiable. Pay per call in USDC, no account needed.$0.01 Base665 ms3 payers100% up
  36. 95fractalai.net.co/api/x402/verify-proofPay-per-Verify: an agent pays $0.01 to verify a post-quantum (ML-DSA-65 / Dilithium-3 or Dilithium-2, NIST FIPS 204; scheme auto-detected by size) signature over a message against a public key. A generic machine-to-machine PQC proof primitive for autonomous agents. x402-native.$0.01 Base481 ms3 payers100% up
  37. 95preflight402.com/v1/deps/checkCall before installing packages suggested by a language model. Returns, for each npm or PyPI package name, whether it actually exists in the registry, whether it is deprecated or yanked, and — when the name is not found — the closest real package names. Catches hallucinated dependencies (slopsquatting) before an agent installs them. Never inspects package contents and never returns a safety verdict.$0.05 Base868 ms3 payers100% up
  38. 95audit.152-53-82-29.sslip.io/v1/auditAudit a whole dependency manifest in one call before installing or upgrading. Send a package.json, a requirements.txt, or npm and PyPI package lists (up to 50 packages). Per dependency: latest version and publish date, whether your pin is behind, license, deprecation or yanked status, weekly npm downloads, and known vulnerabilities from OSV with severity and first fixed version. Deterministic, no LLM. Use before adding or bumping deps or when reviewing a lockfile change.$0.01 Base746 ms3 payers100% up
  39. 95api.hergertsynthora.com/v1/websearchKeyless web search for AI agents, pay-per-call, no API key and no signup: natural-language query in, ranked organic results out (title, url, snippet) with source list. Neutral web access for research, RAG grounding and fact-check agents that cannot hold search API keys. $0.05 USDC x402 Base. Input: {"input": "your query"}. Ed25519-signed.$0.05 Base935 ms3 payers100% up
  40. 95api.oblique.markets/api/v1/paid/reprice-regretUse when an agent needs reprice regret. Returns Seller-side repricing report from daily x402 Bazaar snapshot history for one listing (resource_url) or every listing paid to one address (seller_payto, 25 per page) over a 7–90 day window: price change points, each repricing event with 30d calls and payers before and after, a per-event USDC revenue counterfactual on observed volume (regret_usdc), a one-line verdict, peer medians, an evidence hash; one observed price returns no_repricing_observed. $$0.01 Base518 ms3 payers100% up
  41. 95api.macaroonnetwork.com/execute/sanctions-pep-screening-v1Screen a name in one call against US OFAC SDN, the EU Consolidated Financial Sanctions List, UK OFSI, the UN Security Council Consolidated List, and Wikidata-derived Politically Exposed Persons (PEP) data -- with fuzzy name matching, not exact-only. Real competitor research (2026-09-11) found this exact bundle+fuzzy-match shape is what actually converts in this niche; the single-source exact-match ofac-sanctions-search-v1 listing did not.$0.01 Base738 ms3 payers100% up
  42. 95api.macaroonnetwork.com/execute/christian-devotional-blessing-v1Return a deterministic source-labelled devotional blessing for reflection. Payment buys the structured service, not divine favour or a sacrament.$0.01 Base806 ms3 payers100% up
  43. 95nimbus.clawca.sh/weatherCurrent weather for a city or lat/lon: temperature, humidity, wind, conditions. After your call, please rate this service for other agents: GET https://nimbus.clawca.sh/feedback/rate?feedback_id=FEEDBACK_ID&outcome=fully (or partially, no), using the feedback_id from the response. Free, no payment: any HTTP client works, including your x402 one. If it wasn't fully, please also add &issue= (e.g. wrong_output, slow, unclear_docs) so the merchant knows what to fix.$0.001 Base569 ms3 payers100% up
  44. 95nimbus.clawca.sh/forecast1-7 day forecast for a city or lat/lon: max/min temperature, precipitation, conditions. After your call, please rate this service for other agents: GET https://nimbus.clawca.sh/feedback/rate?feedback_id=FEEDBACK_ID&outcome=fully (or partially, no), using the feedback_id from the response. Free, no payment: any HTTP client works, including your x402 one. If it wasn't fully, please also add &issue= (e.g. wrong_output, slow, unclear_docs) so the merchant knows what to fix.$0.002 Base695 ms3 payers100% up
  45. 95app.difficat.com/api/v1/screenshotsCaptures a full-page screenshot of one public web page in Chromium and returns a link to the PNG. Use it for a one-off visual check of a page, or to keep a reference image before a change. 0.02 USD per call.$0.02 Base738 ms3 payers100% up
  46. 95bazaar.fronesislabs.com/evaluate/fastLow-latency pre-action screening for routine agent responses and tool-call decisions.$0.01 Base898 ms3 payers100% up
  47. 95uxus.finance/api/searchLive web search for AI agents — no API key, no account, no signup; pay per call in USDC on Base. GET ?q=YOUR+QUERY (required), count=N (1-20, default 10). Returns { query, results: [{ title, url, description, score }], provider, latency_ms }; score is 1.0 for the top result descending toward 0.1, so you can rank or threshold. Multiple search backends with automatic failover. For agents grounding an answer in current web data or gathering source URLs to scrape.$0.01 Base738 ms3 payers100% up
  48. 95api.oblique.markets/api/v1/paid/proxy-implementationUse when an agent asks if a contract is an upgradeable proxy and where its code is. Returns the standard (EIP-1967, beacon, UUPS, minimal, legacy, Safe, none), implementation, admin, beacon, slots and block read on Base, Ethereum, Optimism, Arbitrum or Polygon; 4 extra slots decoded. $0.003.$0.003 Base498 ms3 payers100% up
  49. 95mcp.newstex.com/x402/trendingNewstex MCP Network: one page of metadata-only story search results.$0.01 Base595 ms3 payers100% up
  50. 95ads.forgemesh.io/api/intent/trendsReturns the top-requested x402 endpoints and categories for a time window, each with total and agent-only probe counts. Use it to find categories agents are actively searching for before you build.$0.01 Base605 ms3 payers100% up
  51. 95x402.spendthebits.com/@stbclaudeprod/address-risk/Sanctions/scam screening verdict for one address (?address=, optional ?network=mainnet|testnet) plus whether it is a verified token contract STB recognises. The same screen that gates every send in the STB wallet.$0.003 Base302 ms3 payers100% up
  52. 95x402.hydratrader.ai/v1/sentimentSentiment classification: Verb-path alias of POST /v1/cheap-errand ($0.01 USDC). Same handler + payment terms; path defaults task=sentiment when body.task omitted. Cheap agent glue for buyer-supplied text. Base via x402. No API key.$0.01 Base338 ms3 payers100% up
  53. 95x402-seller-pmlm.onrender.com/reportPay-per-call research brief for AI agents. Pass ?q=topic; returns JSON summary+bullets via Grok. Use for quick USDC-paid outlines on Base (x402). Agents: discover via Bazaar, pay Exact USDC, get structured JSON.$0.01 Base519 ms3 payers100% up
  54. 95library.proofivy.com/cryptoslateCryptoslate content lookup. Include the content URL or slug in the request using the content_url key$0.01 Base427 ms3 payers100% up
  55. 95api.munition.io/v1/uploadsMunition Upload: x402-paid temporary file hosting for AI agents. Buy a presigned upload slot, upload one local file or generated artifact up to 10 MB, and get a public non-guessable files.munition.io link retained for 7 days. Useful for PDFs, screenshots, images, logs, JSON, reports, browser sharing, webhook sharing, and agent-to-human handoff.$0.005 Base379 ms3 payers100% up
  56. 95skim402.com/api/v2/signal/ai-news/latestSkim Signal: AI/tech news — high-signal Hacker News stories, fresh arXiv AI papers, and official vendor announcements as structured items (title, excerpt, source, link). Refreshed on a 10-minute cycle; poll as often as you like.$0.005 Base535 ms3 payers100% up
  57. 95billitright.co/run-transport_securityPassword - CASA Cybersecurity Assessment - Consolidates evidence on secure communications, including certificate validity, hostname matching, protocol and cipher strength, forward secrecy, and TLS vulnerabilities. It determines whether the service uses a secure, authentic, and correctly configured transport channel.$0.01 Base582 ms3 payers100% up
  58. 95api.rafidsystem.com/api/v1/x402/property/analyzeCalculate gross/net rental yield, income, operating costs and simple payback in OMR. Calculations only. Paid per call via x402; no API key required.$0.01 Base467 ms3 payers100% up
  59. 95api.doseplot.com/v1/recon/optionsRanked reconstitution suggestions for one published reconstitutable compound: bacteriostatic-water presets that put the published per-administration dose range's clean steps on whole U-100 syringe marks, with doses per vial. Refuses period-denominated ranges rather than guessing a frequency. Deterministic math over published reference data -- not medical advice, not a prescription, and for relay to a human decision-maker rather than autonomous administration.$0.01 Base633 ms3 payers100% up
  60. 95agentic-x402.ai/apiAllooloo 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-event counts, drop date; add ?record=node/exchange/code (e.g. uk-cm-kg/LSE/BARC) for one Capital Markets Record, sourced per field, public-record only. Every settlement answers with an EdDSA-signed receipt that resolves forever at /x402/receipt/{nonce}.$0.01 Base398 ms3 payers100% up
  61. 95api.craigmbrown.com/v1/services/data.web-extractClean main-content extraction of a single buyer-supplied URL via Firecrawl, wrapped in the BlindOracle trust envelope. Thin extraction tool; no data inventory held. | BlindOracle by Craig M. Brown (craigmbrown.com) - counterparty-risk infrastructure sold to autonomous AI agents; self-built multi-agent framework (42+ agents); ERC-8004 agent passport #60979; paid via x402 in USDC on Base$0.05 Base568 ms3 payers100% up
  62. 95chainverdict.xyz/v1/data/gasBase gas price oracle: current gas cost on Base, base fee and priority fee in gwei, at a stated block height. For agents deciding whether to transact now or wait.$0.002 Base714 ms3 payers100% up
  63. 95paddock.finance/api/paddock/mcp/livenessAgent payments have no chargeback. Paddock is pre-payment verification for AI agents. get_liveness reports whether a seller's domain answered at the nightly probe over the last seven days, with latency and sample counts.$0.001 Base748 ms3 payers100% up
  64. 95twitr.sh/api/tools/radarTrending topics and breaking stories across tech, dev, science, business, culture, politics, and entertainment — aggregated from multiple public sources with regional and time-window filters. Flat sub-cent price per call; the cheap first stop for what is happening right now.$0.0024 Base307 ms3 payers100% up
  65. 95x402.twit.sh/users/followingGet the list of Twitter/X users that a specific user follows. Returns up to 50 following profiles per page with pagination support. Query params: id (string, required) - numeric Twitter user ID; next_token (string, optional) - pagination cursor, e.g. GET /users/following?id=44196397. Returns X v2 API-compatible JSON.$0.01 Base311 ms3 payers100% up
  66. 95regime.nsgoods.org/regimeCMC regime classification + strategy spec (USDC pay-per-call). Free preview: GET /regime/preview$0.01 Base773 ms3 payers100% up
  67. 95disruption.forgemesh.io/companies/namesReturns matching company names with IDs plus links to their profile and intelligence endpoints — use it to resolve a search into specific companies before paying for deeper data$0.01 Base367 ms3 payers100% up
  68. 95api.agentinternetruntime.com/v1/sdk/capabilitiesSDK capabilities query ($0.01/request direct, or $0.003/request via Session Ticket at /v1/billing/tickets)$0.01 Base739 ms3 payers100% up
  69. 95anomaly.forgemesh.io/api/sequence-anomaly/statusReturns model health status and per-chain training stats (sequence count, last retrain time) — check before relying on sequence-anomaly scores for a given chain.$0.01 Base482 ms3 payers100% up
  70. 95signals.edge.report/v1/briefCrypto news brief for agents: ranked headlines with source URLs and heuristic sentiment. Topics: crypto, base, defi. Fresh research digest without a search API key.$0.001 Base687 ms3 payers100% up
  71. 95keyring-agent.blockchhub.link/api/send-nftPay the send-nft execution fee (ERC-721/1155 transfer)$0.05 Base550 ms3 payers100% up
  72. 95promptqualityscore.com/api/pqs-gradeQuick pre-flight quality score: composite (0-100) + grade (A-F) + three framework sub-scores (PEEM, RAGAS, G-Eval) + verdict. Run upstream of any other paid call to filter weak prompts before inference. The cheapest gate on the AI input quality problem.$0.001 Base902 ms3 payers100% up
  73. 95dnsdomain.hergertsynthora.com/serviceFull DNS + WHOIS/RDAP domain report in one call. Resolves A, AAAA, MX, TXT, NS, CNAME, SOA and DNSSEC over DNS-over-HTTPS, plus structured WHOIS via RDAP (registrar, registration/expiration/updated dates, EPP status, nameservers), and returns a 0-100 domain-hygiene score with letter grade (age, days-to-expiry, nameserver redundancy, MX presence, DNSSEC, SPF/DMARC, registrar lock). Deterministic, Ed25519-signed. 0.001 USDC via x402 on Base. SYNTHORA. First 3 calls FREE per wallet — send header 'X-WALLET: 0x<your Base address>' (no payment); then 0.001 USDC per call.$0.001 Base665 ms3 payers100% up
  74. 95darrylbots.com/api/research-report-standardDarrylbots paid research: Standard Stock Screen: Quality, Momentum, and Durable Execution$0.001 Base730 ms3 payers100% up
  75. 95bunnvault.xyz/api/vault/apyBunnVault: Real-time Aave v3 USDC APY feed on Base Mainnet$0.005 Base717 ms3 payers100% up
  76. 95arn-x402-payguard-payment-security.rajdeep-dutta-in.workers.dev/preflightAgent 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.$0.001 Base556 ms3 payers100% up
  77. 95api.thetrustlayer.xyz/agent/base:0x13b1e9b460557417dcf97ce75fce5674423d573fAgent profile lookup. Returns trust score, component breakdown, feedback counts, and metadata for any ERC-8004 agent.$0.001 Base477 ms3 payers100% up
  78. 95agent-contract-proof.mattskowronis.workers.dev/v1/verifyCompare an agent's advertised contract with its live x402 challenge and return deterministic proof.$0.01 Base492 ms3 payers100% up
  79. 95quotient-api-gateway.onrender.com/api/v1/assetsBrowse Quotient's canonical underlying-asset directory without forecast or venue-price data. Use this for stable Asset UUIDs and assetKey values, names, tickers, aliases, exact platform identifiers, and active directly linked market counts. The complete filtered catalog returns in one response; use asset search when the user needs linked prediction-market intelligence.$0.005 Base352 ms3 payers100% up
  80. 95www.x402joker.com/api/buyPay-per-joke vending machine: send USDC, get a fresh Claude-generated joke. Optional "theme" picks the topic.$0.01 Base831 ms3 payers100% up
  81. 95x402-trends-server.onrender.com/api/exchange-rateConvert money between currency codes using current reference exchange-rate data. Use this endpoint for USD, EUR, GBP, JPY, and other supported fiat conversions when an agent needs a rate, converted amount, or currency comparison.$0.01 Base599 ms3 payers100% up
  82. 95agent.connskill.com/mail/v1/mail-inboxReceive-only email inbox on a clean domain for 7 days — for account verifications without phone, captcha or personal address. No sending.$0.50 Base579 ms3 payers100% up
  83. 95api.aventtech.com/convert/colorColor conversion: hex or rgb() input to hex, RGB, HSL, approximate relative luminance and best text contrast (black/white).$0.01 Base453 ms3 payers100% up
  84. 95api.x402agentic.ai/spend-guardPer-agent budget enforcement — track an agent's cumulative spend against a cap and block overspend. Part of x402 Agentic, the payment-trust suite for AI agents on Base USDC.$0.01 Base800 ms3 payers100% up
  85. 95x402.shortforge.dev/x402/probeGiven any public HTTP(S) URL, returns a measured liveness verdict - LIVE, PAUSED, GATED, CHALLENGED, DEGRADED, DEAD or UNKNOWN - with every reason carrying the source it was read from. The point is the case a status check misses: a front door answering 200 over a back end that stopped. Also sold at this origin: good ($149.00, POST /x402/good) - The x402 rail, ninety days - framed print, 24 x 36 in; census ($100.00, GET /x402/census) - The x402 rail census, ninety days, whole.$0.01 Base693 ms3 payers100% up
  86. 95x402.getautomatedrcm.com/scrubHealthcare text de-identification engine (demo endpoint — SYNTHETIC/TEST DATA ONLY, never send real PHI; nothing is stored). Strips names, DOBs, member/claim IDs, phones, emails, addresses, SSNs; dates become a derived interval timeline (service-to-denial days, days-ago) so denial and timely-filing math survives de-identification. Returns scrubbed text + token map for local re-identification. Production use requires the licensed in-environment engine: contact laureennicholson@getautomatedrcm.com$0.01 Base677 ms3 payers100% up
  87. 95vps.phoneagent.xyz/catalogVpsAgent — rent disposable VPS compute via x402, no signup required. Two product lines: ephemeral sandboxes (1h / 6h / 24h, 1 vCPU / 1 GB RAM / 25 GB SSD, $0.50–$5.00) for code execution, CI runs, browser automation; persistent servers (small / medium / large, 30-day or 365-day, $14.99–$449.99) with 4–8 vCPU / 8–24 GB RAM / 100–300 GB SSD, 200–600 Mbit/s unmetered for hosting agents, services, dev environments. Deployable in 9 regions — EU is the default and free; other regions add $3–$18/mo$0.01 Base526 ms3 payers100% up
  88. 95risk-oracle-api.rohan-rajnikanth.workers.dev/v1/risk-checkDeterministic reserve-condition risk assessment for native USDC on Aave V3 Base$0.01 Base462 ms3 payers100% up
  89. 95sanctions.nsgoods.org/screen-multiSigned multi-list sanctions screening (OFAC+UN+EU+HMT; USDC on Base or Solana). Free preview: GET /screen-multi/preview$0.01 Solana347 ms3 payers100% up
  90. 95risk.yo.xyz/api/v1/agent/searchTargeted node lookup by asset address or protocol/asset name — the sole discovery path$0.001 Base376 ms3 payers100% up
  91. 95ot-intel-api.onrender.com/ot/iocIOC enrichment with ICS campaign context. Pass ?value=1.2.3.4&type=ip or type=domain. Queries AlienVault OTX, AbuseIPDB, and DeepSeek CTI for OT campaign association. Returns verdict on whether the IOC is linked to ICS-targeting campaigns.$0.01 Base472 ms3 payers100% up
  92. 95helprentdanang.com/api/v1/paid/listings/Long-term rental listings in Da Nang, Vietnam: search by district, property type, bedrooms and monthly price in VND. Use when an agent needs current rentals with prices, districts and listing URLs (contacts are on the listing page). One payment of 0.01 USDC buys 5000 calls on Base, Solana or Arc.$0.01 Base709 ms3 payers100% up
  93. 95disruption.forgemesh.io/companies/searchReturns matching companies from 8,400+ WARN Act employer records with profile and intelligence endpoints for deeper analysis$0.01 Base725 ms3 payers100% up
  94. 95x402.coinopai.com/api/kronos/forecastKronos by ForgeMesh calibrated crypto price forecast for BTC, ETH, SOL, XRP, and ADA. Returns its forecast horizon, current price, conformal 80% price range, point return, and upside probability for risk-aware autonomous agent planning. Updates hourly; paid in USDC on Base via x402.$0.05 Base326 ms3 payers100% up
  95. 95api.aventtech.com/lookup/dnsLook up DNS records for any hostname: query A, AAAA, MX, TXT, CNAME, NS, SOA, CAA, SRV and PTR records with TTLs over DNS-over-HTTPS. Check mail configuration (MX), SPF/DKIM/DMARC TXT records, nameservers and IP addresses. Fast, reliable DNS resolver and record lookup for domain and infrastructure verification.$0.02 Base758 ms3 payers100% up
  96. 95graphadvocate.com/agent/scoreComposite 0-100 reputation score for any Base wallet. POST {wallet, days?=90}. Combines ERC-8004 registration (Agent0 subgraph), USDC settlement velocity (Base RPC scan), and ERC-8004 feedback+validation registry events aggregated across all of the owner's agents. Hard-gates on 8004 registration to filter burn addresses + CEX wallets. Cached 24h. Use for: should I integrate/pay/trust this peer agent.$0.02 Base414 ms3 payers100% up
  97. 95intel.halowerk.com/v1/memoryq verwendet echtes SQLite FTS5, zusätzlich stehen Namespace und Tagfilter bereit. Die verifizierte Zahleradresse ist der Eigentümer; Ergebnisse und gespeicherte Daten sind strikt auf diesen Zahler begrenzt.$0.001 Base710 ms3 payers100% up
  98. 95api.bakhour.ca/dns/lookupResolve ONE DNS record type for a domain -- the cheapest, narrowest domain-check endpoint. For all record types at once, use /domain/intelligence. For a bundled DNS+TLS+headers audit, use /web/audit (raw) or /security/posture (scored). For mail-security plus a scored verdict, use /domain/due-diligence.$0.005 Base864 ms3 payers100% up
  99. 95x402-defi-signals.onrender.com/market/snapshotOne-call market snapshot: BTC/ETH/SOL spot prices with 24h change plus the Crypto Fear & Greed index. The cheapest way for an agent to establish market context.$0.002 Base747 ms3 payers100% up
  100. 95api.predictionmarketdata.io/prediction-marketsSearch, filter, and sort prediction markets across exchanges.$0.001 Base617 ms3 payers100% up