Explore APIs
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
379 results- Ttestnet-x402-api.karpak.xyzSearch & web
Search parking lots worldwide by name, place, setting, facility, amenity and status, or find the nearest to a point: a page of up to 100 lots with live free spaces, hourly prices in USD and distances, and per-country totals; sorted and nearby results come in one page
Base Sepoliatestnet-x402-api.karpak.xyzfrom $0.0014 endpoints
OKF IndexSearch & webOKF Index: search Brazilian federal laws by number/year or words (up to 20 items), paid per call
Baseokfindex.comfrom $0.012 endpoints- Nnohumans.directorySearch & web
Should my agent pay this x402 endpoint? One call returns pay, caution or avoid with plain reasons: probe history, payment-address stability, whether we bought it with real USDC and it delivered (with the tx), and whether the live price matches the listed one.
Baseapi.nohumans.directoryfrom $0.0053 endpoints - Nn8n.eotrends.comSearch & web
Summarize and classify a text (up to 4000 characters). POST a JSON body {"text": "..."}. The summary is written in the language of the input text. Categories: news, opinion, technical, commercial, other.
Basen8n.eotrends.comfrom $0.021 endpoint - SStableTicketsSearch & web
Search Ticketmaster events by keyword, date, location, venue, attraction, or classification
Basestabletickets.devfrom $0.012 endpoints - CCORS Header CheckerSearch & web
Sends a real request to any URL you provide, attaches an Origin header, and reads back all six standard cross-origin permission headers the server returns. Tells you whether cross-origin requests are enabled at all, whether your specific origin is permitted, and shows every permission value exactly as the server sent it. Useful for finding why a browser is blocking a request, confirming a new depl
BaseSolanacors-header-checker.underscoredone.comfrom $0.011 endpoint
Wingman Agent GatewaySearch & webLive web search for AI agents. POST a query and get the top results as JSON [{title, url, snippet}] (count: default 8, up to 25). Pay per call in USDC on Base with x402: no account and no API key. Read any result with /v1/web_read.
Baseagent.wingmanprotocol.comfrom $0.0023 endpoints- Xx402-v2-mint-itunes-search.vercel.appSearch & web
iTunes Search API (keyless). term (+ media/entity/limit/country) → trimmed track/collection/artist results.
Basex402-v2-mint-itunes-search.vercel.appfrom $0.0021 endpoint - Xx402-v2-mint-iban-bic-validate.vercel.appSearch & web
Offline IBAN MOD-97 (ISO 13616) + BIC/SWIFT format check. No SWIFT directory scrape.
Basex402-v2-mint-iban-bic-validate.vercel.appfrom $0.0021 endpoint - Xx402-v2-mint-fda-drug-label.vercel.appSearch & web
openFDA drug label search (keyless). search (+ limit) → trimmed labels (openfda brand/generic, indications, warnings subset).
Basex402-v2-mint-fda-drug-label.vercel.appfrom $0.0031 endpoint - Xx402-v2-mint-arxiv-metadata.vercel.appSearch & web
arXiv paper metadata via export.arxiv.org Atom API (keyless). Id or search query → title/authors/abstract/pdf.
Basex402-v2-mint-arxiv-metadata.vercel.appfrom $0.0051 endpoint - FFlight Search & AirfaresSearch & web
Flight search by departure and arrival airports in the URL — compare live itineraries, fares, schedules, stops and emissions across airlines, similar to Google Flights, as clean JSON.
BasePolygonArbitrum+1flights.use.x402atlas.comfrom $0.051 endpoint - Aapi.webextract.devSearch & web
Fetch a public web page (robots.txt respected) and return cleaned Markdown plus fixed-schema JSON: article metadata, product/price, and tables with row/column checks.
BasePolygonArbitrum+4api.webextract.devfrom $0.0022 endpoints - KKeenableSearch & web
Keenable SELECT for AI agents: one read-only SQL query over live web results (search, fetch and LLM field extraction), answered as a table. Write the query from https://select.keenable.ai/guide.md. Sign a ceiling (max_usd, default $0.10); you pay what the query cost, from $0.01.
Base Sepoliaapi-test.keenable.aifrom $0.101 endpoint - Xx402-v2-mint-npm-search.vercel.appSearch & web
[concierge json-pick] Search the npm registry (keyless). POST {text, size?≤20} → name, version, description, weekly downloads, links. Empty/invalid after settle → 400 charged:false.
Basex402-v2-mint-npm-search.vercel.appfrom $0.0035 endpoints - SSite AuditSearch & web
Can Googlebot, Bingbot and AI crawlers (GPTBot, ClaudeBot, CCBot) fetch this page? robots.txt, sitemap and noindex checked.
BaseSolanaPolygon+1site-audit.x402tookit.comfrom $0.034 endpoints - Sseeker.4itools.storeSearch & web
Ranked digest of live paid bounties and earning opportunities for AI agents. Use when an agent needs current, scored opportunities with deadline and links instead of crawling each platform.
Baseseeker.4itools.storefrom $0.0025 endpoints - SSearch AggregatorSearch & web
Search Aggregator fast tier (GET): Serper web search via URL query params ?query=...&max_results=... , fixed price $0.01 USDC. query is required. Mode is fixed by the path.
BaseSolanasearch.combify.appfrom $0.012 endpoints - Rresearch.halowerk.comSearch & web
Searches the official EU open data portal and returns datasets with what decides whether they are usable: the licence, classified by whether commercial reuse is allowed and what attribution or share-alike it demands. A dataset under a non-commercial licence is marked as unusable for a paid product rather than listd as if equivalent. Each result also carries its publisher, country, last modificatio
Baseresearch.halowerk.comfrom $0.0054 endpoints - OOpen SearchSearch & web
One query across Wikipedia, Hacker News, Crossref papers and Wikidata: top hits from each, source-labelled and interleaved.
BaseSolanaPolygon+1open-search.x402tookit.comfrom $0.025 endpoints - GGlobal Law SearchSearch & web
Global law search across JP/US/UK/EU legislation databases (e-Gov, eCFR, legislation.gov.uk, EUR-Lex). Structured JSON results with statute references.
BaseSolanalaw-mcp.toulaw.workers.devfrom $0.011 endpoint - SStableEnrichSearch & web
Exa Search - Neural search across the web
SolanaBaseenrichx402.comfrom $0.012 endpoints - LLook up an emojiSearch & web
Resolve an emoji by its shortcode (e.g. "smile" or ":smile:") or exact name. Provide exactly one field. Returns the emoji, its metadata and code points.
Baseemoji.openverbs.comfrom $0.0024 endpoints - DDomain Availability CheckerSearch & web
Give this API up to 10 domain names and it tells you whether each has a registration record at the official registry. It uses RDAP, the structured replacement for WHOIS, so there is no free-text parsing. Each domain comes back as 'registered', 'unregistered', or 'indeterminate' when the registry has no RDAP for that ending. 'Unregistered' means no record was found, which usually means available -
BaseSolanadomain-availability-checker.underscoredone.comfrom $0.011 endpoint - GGEDX402 FirecrawlSearch & web
Firecrawl v2 API proxy — map. JSON body matches https://docs.firecrawl.dev/api-reference/v2-introduction. Poll GET routes are free; POST/PUT/DELETE are x402. $0.010 USDC per request. Agent search: site map, crawl map, firecrawl map, links.
Basebrowser.gedx402.comfrom $0.012 endpoints - AAI Data ToolsSearch & web
Data Quality Gate: deterministic dataset quality verdict
SolanaBaseaidatatools.devfrom $0.011 endpoint
Affiliate.comSearch & webList the merchants behind the catalog. Filter by name or domain search, by country, or by product count, and page through the results.
Baseaffiliate.pay.zeroclick.iofrom $0.021 endpoint- TTenderDeltaSearch & web
Search explainably qualified EU solar and battery tenders from an explicitly dated TED snapshot
Basetenderdelta-preview.mooncakemonkey1.workers.devfrom $0.011 endpoint
ForgeMesh ShopScoutSearch & webCompare single-seller and split baskets using supplied shipping rules, including free-shipping thresholds and delivery constraints. Estimates exclude tax and duties.
Baseshopscout.forgemesh.iofrom $0.012 endpoints- Ooratio-api-production.up.railway.appSearch & web
Find cited Latin or English prayers and historical liturgical source excerpts from Divinum Officium by occasion, language and liturgy, using EmbeddingGemma 2 semantic search.
Baseoratio-api-production.up.railway.appfrom $0.051 endpoint
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.