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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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4,273 results- Xx402-v2-mint-openfoodfacts-product-lookup.vercel.appOther services
Open Food Facts product lookup (keyless). POST {barcode|code|q|query}. Empty -> 400 not charged.
Basex402-v2-mint-openfoodfacts-product-lookup.vercel.appfrom $0.021 endpoint - Xx402-v2-mint-openfigi-search.vercel.appMarkets & finance
OpenFIGI instrument search/mapping (keyless). POST {query} (+ optional start/exchCode/securityType/marketSecDes). Unpaid empty → 402; after settle empty/invalid → 400 charged:false. Disclose adjacency: sec-companyfacts / sec-ticker-lookup (SEC filings ≠ FIGI identifiers).
Basex402-v2-mint-openfigi-search.vercel.appfrom $0.021 endpoint - Xx402-v2-mint-openfda-food-enforcement.vercel.appSearch & web
openFDA food enforcement / recalls (keyless). POST {search} and/or {status?,limit?}. Empty → 404 not charged.
Basex402-v2-mint-openfda-food-enforcement.vercel.appfrom $0.021 endpoint - Xx402-v2-mint-openfda-drug-event.vercel.appSearch & web
openFDA drug adverse events / FAERS (keyless). POST {search} and/or {limit?}. Empty → 404 not charged.
Basex402-v2-mint-openfda-drug-event.vercel.appfrom $0.021 endpoint - Xx402-v2-mint-openfda-drug-enforcement.vercel.appSearch & web
openFDA drug enforcement / recalls (keyless). POST {search?} / {limit?}. Empty → 400 not charged.
Basex402-v2-mint-openfda-drug-enforcement.vercel.appfrom $0.021 endpoint - Xx402-v2-mint-openfda-device-recall.vercel.appSearch & web
openFDA device recall (keyless). POST {search} and/or {limit?}. Empty → 404 not charged.
Basex402-v2-mint-openfda-device-recall.vercel.appfrom $0.021 endpoint - Xx402-v2-mint-openfda-device-event.vercel.appSearch & web
openFDA device adverse events (keyless). POST {search} and/or {limit?}. Empty → 404 not charged. W32 deferral.
Basex402-v2-mint-openfda-device-event.vercel.appfrom $0.021 endpoint - Xx402-v2-mint-openfda-device-510k.vercel.appSearch & web
openFDA device 510(k) clearance lookup (keyless). POST {search} and/or {applicant?,product_code?,limit?}. Empty → 404 not charged.
Basex402-v2-mint-openfda-device-510k.vercel.appfrom $0.021 endpoint - Xx402-v2-mint-openbrewerydb-breweries.vercel.appSearch & web
Open Brewery DB brewery search (keyless). POST {} or {by_city?}/{per_page?}. Unpaid empty → 402; after settle empty/invalid → 400 charged:false. Open data brewery directory.
Basex402-v2-mint-openbrewerydb-breweries.vercel.appfrom $0.021 endpoint - Xx402-v2-mint-openbd-isbn-lookup.vercel.appOther services
OpenBD Japanese ISBN bibliographic lookup (keyless; disclose isbn/openlibrary/Hathi/IA). POST {isbn|isbns}. Empty -> 400 not charged.
Basex402-v2-mint-openbd-isbn-lookup.vercel.appfrom $0.021 endpoint - Xx402-v2-mint-openalex-works.vercel.appSearch & web
OpenAlex works search (keyless). POST {query|search} with optional {per_page?}. Empty → 400 not charged.
Basex402-v2-mint-openalex-works.vercel.appfrom $0.021 endpoint - Xx402-v2-mint-openalex-sources.vercel.appSearch & web
OpenAlex sources/venues search (keyless; disclose works/authors adjacency). POST {q|search|query}/{per_page?}. Empty -> 400 not charged. W44 deferral return.
Basex402-v2-mint-openalex-sources.vercel.appfrom $0.021 endpoint - Xx402-v2-mint-openalex-institutions.vercel.appCrypto & DeFi
OpenAlex institutions search (keyless; disclose OpenAlex adjacency). POST {q|search|query}/{per_page?}. Empty -> 400 not charged. Board W45 swap for gtex.
Basex402-v2-mint-openalex-institutions.vercel.appfrom $0.021 endpoint - Xx402-v2-mint-openalex-authors.vercel.appSearch & web
OpenAlex authors search (keyless; disclose works adjacency). POST {q|search|query}/{per_page?}. Empty -> 400 not charged.
Basex402-v2-mint-openalex-authors.vercel.appfrom $0.021 endpoint - Xx402-v2-mint-openaire-publications.vercel.appSearch & web
OpenAIRE publications search (keyless). POST {q|title}/{size?}. Empty -> 400 not charged. Disclose openalex-works/crossref adjacency.
Basex402-v2-mint-openaire-publications.vercel.appfrom $0.021 endpoint - Xx402-v2-mint-openaire-datasets.vercel.appSearch & web
OpenAIRE datasets search (keyless; ≠ publications). POST {title?}/{doi?}/{size?}. Empty -> 400 not charged. openaire-publications/zenodo/dryad/figshare/dataverse adjacency disclosed.
Basex402-v2-mint-openaire-datasets.vercel.appfrom $0.021 endpoint - Xx402-v2-mint-ols-ontology-search.vercel.appSearch & web
EBI OLS4 ontology term search (keyless). POST {q|query}/{rows?}. Empty -> 400 not charged.
Basex402-v2-mint-ols-ontology-search.vercel.appfrom $0.021 endpoint - Xx402-v2-mint-oecd-cli.vercel.appSocial & people
OECD Composite Leading Indicators SDMX (keyless). POST {country?}/{start_period?}. Empty -> 400 not charged. worldbank/bls adjacency disclosed.
Basex402-v2-mint-oecd-cli.vercel.appfrom $0.021 endpoint - Xx402-v2-mint-obis-occurrence.vercel.appSearch & web
OBIS marine species occurrences (keyless). POST {scientificname} (+ optional size). Unpaid empty → 402; after settle empty/invalid → 400 charged:false. Disclose adjacency: gbif-species-match / inaturalist-taxa-search / itis-taxonomy-search / eol (eol deferred).
Basex402-v2-mint-obis-occurrence.vercel.appfrom $0.021 endpoint - Xx402-v2-mint-nyc-property-check.vercel.appAI & agents
NYC HPD registration + housing violations (partner wrap of x402-mcp). Refund if partner fails after settle.
Basex402-v2-mint-nyc-property-check.vercel.appfrom $0.021 endpoint - Xx402-v2-mint-nyc-311-requests.vercel.appData & research
NYC Open Data 311 service requests (keyless). POST {limit?}/{borough?}/{complaint_type?}. Empty {} -> 400 not charged. Civic 311 vertical — disclose chicago-food adjacency.
Basex402-v2-mint-nyc-311-requests.vercel.appfrom $0.021 endpoint - Xx402-v2-mint-nws-alerts-lookup.vercel.appData & research
NWS active weather alerts (keyless). POST {area} and/or {point}/{zone}. Empty features → 404 not charged.
Basex402-v2-mint-nws-alerts-lookup.vercel.appfrom $0.021 endpoint - Xx402-v2-mint-nuget-package.vercel.appOther services
NuGet (.NET) package versions via flat container (keyless). POST {id|package}. Unpaid empty → 402; after settle empty/invalid → 400 charged:false. Disclose adjacency: packagist-package / crates-io-lookup / rubygems-lookup (≠ those registries; .NET NuGet lane).
Basex402-v2-mint-nuget-package.vercel.appfrom $0.021 endpoint - Xx402-v2-mint-npi-registry-lookup.vercel.appOther services
CMS NPI Registry lookup (keyless). POST {npi} and/or {first_name,last_name,state} / organization_name. Empty result → 404 not charged.
Basex402-v2-mint-npi-registry-lookup.vercel.appfrom $0.021 endpoint - Xx402-v2-mint-nola-property-check.vercel.appAI & agents
New Orleans active STR license check (partner wrap of x402-mcp). Refund if partner fails after settle.
Basex402-v2-mint-nola-property-check.vercel.appfrom $0.021 endpoint - Xx402-v2-mint-nobel-laureates.vercel.appOther services
Nobel Prize laureates (keyless). POST {limit?, offset?, nobelPrizeYear?, nobelPrizeCategory?, name?}. Unpaid empty → 402; after settle empty/invalid → 400 charged:false. Soft disclose wikipedia-summary.
Basex402-v2-mint-nobel-laureates.vercel.appfrom $0.021 endpoint - Xx402-v2-mint-noaa-tide-predictions.vercel.appOther services
NOAA CO-OPS tide predictions (keyless). POST {station} and/or {date?,datum?}. Empty → 404 not charged.
Basex402-v2-mint-noaa-tide-predictions.vercel.appfrom $0.021 endpoint - Xx402-v2-mint-nist-nvd-cve-lookup.vercel.appOther services
NIST NVD CVE 2.0 lookup (keyless). POST {keyword?} / {cveId?} / {resultsPerPage?}. Empty → 400 not charged. Respects NVD rate limits.
Basex402-v2-mint-nist-nvd-cve-lookup.vercel.appfrom $0.021 endpoint - Xx402-v2-mint-nih-reporter-lookup.vercel.appSearch & web
NIH RePORTER v2 project search (keyless). POST {term} and/or {fiscal_years?,offset?,limit?}. Empty → 404 not charged.
Basex402-v2-mint-nih-reporter-lookup.vercel.appfrom $0.021 endpoint - Xx402-v2-mint-nhtsa-recalls.vercel.appAI & agents
NHTSA vehicle safety recalls by make/model/year (keyless). POST {make}/{model}/{modelYear}. Unpaid empty → 402; after settle empty/invalid → 400 charged:false. No catalog adjacency.
Basex402-v2-mint-nhtsa-recalls.vercel.appfrom $0.021 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.