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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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Data & research
273 results- Aapi.lastlookdata.comData & research
LastLook Data — current 30-year US Treasury yield (DGS30). Alias for /api/current?id=DGS30.
Baseapi.lastlookdata.comfrom $0.014 endpoints
Machina SportsData & researchResolves a provider id (api_football, sportradar, opta, entain, espn) or canonical machina URN to the entity it identifies, with all cross-provider ids attached.
Basemachina.pay.zeroclick.iofrom $0.012 endpoints- PPayPerByteData & research
NWS weather forecasts for 5 US cities (NYC, LA, Chicago, Houston, Miami)
Basex402.payperbyte.iofrom $0.0032 endpoints - WwickedapiData & research
Demo weather - current conditions for New York City
Basepaywall.wickedapi.comfrom $0.011 endpoint - Sstat.halowerk.comData & research
Reports the credit-to-GDP gap for a country, which is the deviation of the credit ratio from its long-run trend and the quantity the Basel framework uses to trigger the countercyclical capital buffer. The thresholds applied are the regulatory ones — the buffer starts to build at a gap of two percentage points and is at maximum by ten — and they are returned with the result, because a phase judgeme
Basestat.halowerk.comfrom $0.00159 endpoints - MMath and StatisticsData & research
A/B conversion test: rates, relative lift, two-proportion z-test p-value, confidence interval and a significance verdict.
BaseSolanaPolygon+1math-stats.x402tookit.comfrom $0.0210 endpoints - Kklima.halowerk.comData & research
Selects and applies a supplied published CBAM default factor for a goods group. Missing facts are returned as null and named in unavailable_fields where applicable. Derived values disclose their method; source-backed values disclose source, time window and age. This is neither legal advice nor customs advice.
Baseklima.halowerk.comfrom $0.0039 endpoints - AAIS FleetData & research
Get the vessels currently in a UN/LOCODE port as JSON: MMSI, name and arrival time of every vessel the AIS Fleet network observes there now, with a total count.
Baseaisfleet.comfrom $0.0113 endpoints - Vvitrineretirement.caData & research
One Canadian retirement residence's record from the Vitrine Retirement Index: Vitrine's score, band and rank, counts and dates of regulator records, and links.
Basevitrineretirement.cafrom $0.101 endpoint - IIdentifier ValidatorsData & research
Validate a 9-character CUSIP security identifier check digit and split issuer and issue codes.
BaseSolanaPolygon+1id-validators.x402tookit.comfrom $0.029 endpoints - Llauf.halowerk.comData & research
Distinct from route/matrix: assigns jobs to up to four vehicles and orders visits at a common depot, reports arrival/wait/service/return times, capacity usage and unassigned jobs. Consumes caller travel-time matrix, including durations_s from HALOWERK route/matrix, avoiding a duplicate routing API or invented road data. Deterministic earliest-deadline cheapest-feasible-insertion heuristic; no glob
Baselauf.halowerk.comfrom $0.0068 endpoints - CCORE JSON ValidatorData & research
Use this service before importing or publishing JSON to check it against a restricted draft-07 schema. Send dataJson and schemaJson as JSON-encoded strings. Max 256 KiB UTF-8 each, depth 32; bounded node and work limits. Supports types, required properties, items, enums and numeric/length bounds. No regex, combinators or external references. Invalid business data returns valid=false.
Baseapi.coregroupimmo.comfrom $0.0023 endpoints - Ffactstamp.agentrails.workers.devData & research
Check a citation before repeating it. Give a DOI, an arXiv ID or a paper title; the answer says whether the work exists, what it is (title, authors, year, container) and whether it has been retracted. A title that is absent from both Crossref and arXiv returns not_found, and a near title match is never reported as verified. Cited to the source record with its retrieval time. Verdicts: verified, am
Basefactstamp.agentrails.workers.devfrom $0.029 endpoints - SSecurity MathData & research
Birthday-problem collision odds for random IDs or hash outputs, or the count of items that reaches a target probability.
BaseSolanaPolygon+1security-math.x402tookit.comfrom $0.028 endpoints - CCourt Delta ProData & research
Look up a North Carolina (NC) court case or traffic citation and get its status, hearing dates, charges, party roster and counsel, dispositions, service of process, and bail / failure-to-appear signals. Supply ONE of caseNumber, citation, portalSessionRef or caseHash. Read-only. Informational, not legal advice.
Basemcp.courtdelta.comfrom $0.014 endpoints - PParallaxData & research
The funnel, honestly, for one seller over the indexed window: settled USDC and purchases, distinct buyers, organic share after self-test exclusion, recurring buyers, buyer half-life and the facilitator mix.
BaseSolanaparallax402.comfrom $0.014 endpoints - PPolyformData & research
Recent IPs caught probing Polyform's honeypot paths (credential/vuln scanners) — Polyform's own first-party telemetry, not a repackaged public list. Returns up to 500 most-recent scanner IPs with first-seen. For blocklists and threat research. JSON.
Baseapi.polyform.orgfrom $0.011 endpoint
yields.genexxis.comData & researchGovernment yield at any tenor (e.g. 18M, 7Y, 12Y) for US, EA or MA, linearly interpolated between published points, with 1-month and 1-year-ago values.
Baseyields.genexxis.comfrom $0.0053 endpoints- Aairports.genexxis.comData & research
Decoded METAR and TAF (next 12 h) for up to 10 ICAO stations worldwide: wind, visibility, ceiling, flight category, temperature, weather, raw reports.
Baseairports.genexxis.comfrom $0.0033 endpoints - VVennatta Document ExtractionData & research
Extract structured text, summaries, or metadata from supplied document text or a public HTTPS document URL.
BaseSolanavennatta-core.onrender.comfrom $0.013 endpoints - CColor and Design ToolsData & research
Best text color (black or white) for a background hex color, with contrast ratios and WCAG AA/AAA results for both.
BaseSolanaPolygon+1color-design.x402tookit.comfrom $0.028 endpoints - AAviation WeatherData & research
Airport weather now and ahead in one call: current flight category, worst forecast category, wind and trend.
BaseSolanaPolygon+1aviation-weather.x402tookit.comfrom $0.028 endpoints - VValidate Czech VAT numberData & research
Validate a Czech VAT (DIČ) number for a legal entity against the official register. Validity means the subject exists and is live in the VAT (DPH) register.
Basevat.openverbs.comfrom $0.0066 endpoints - SSpace Weather IntelligenceData & research
Current space-weather conditions — normalized NOAA SWPC Kp, solar wind, magnetic field, and X-ray flux used for solar-flare monitoring, with observation times and freshness.
BasePolygonArbitrum+1space-weather.use.x402atlas.comfrom $0.0053 endpoints
SkyCastData & researchCurrent weather for a city or lat/lon: temperature, humidity, wind, conditions.
Baseskycast.clawca.shfrom $0.0012 endpoints- Llab.paidapis.netData & research
Freshness-tiered pricing: gas price + ETH/USD price, same data either way. ?freshness=cached ($0.002) serves the last known values with no network call; ?freshness=live ($0.02) forces a guaranteed-current fetch right now.
Baselab.paidapis.netfrom $0.0025 endpoints - IIP Geolocation LookupData & research
Resolve any public IPv4/IPv6 address (or hostname) to geolocation for analytics, fraud, and ops agents. Returns ISO country code, region, city, IANA timezone, latitude/longitude, EU membership flag, and the matched network range. Backed by an embedded MaxMind GeoLite2 dataset (no external API calls). Private and reserved IP ranges are rejected; no shell access.
Basegeoip.bip-rep.comfrom $0.0051 endpoint - AApply a JSON PatchData & research
Apply an RFC 6902 JSON Patch to a JSON document and return the result. An invalid or unresolvable patch (e.g. a failed `test`, or a path that does not exist) is rejected before payment.
Basedata.openverbs.comfrom $0.0046 endpoints - SStatistical TestsData & research
Adjust p-values for multiple testing (Bonferroni, Sidak, Holm, Benjamini-Hochberg) and see which tests survive.
BaseSolanaPolygon+1stats-tests.x402tookit.comfrom $0.027 endpoints - Hhoujin.agentic-jp.comData & research
Dataset metadata for this Japanese (JP) corporate-number API — how many corporations are loaded and which prefectures are covered.
BasePolygonSolanahoujin.agentic-jp.comfrom $0.0013 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.