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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-rxnorm-lookup.vercel.appOther services
NLM RxNorm drug name↔RxCUI lookup (keyless). POST {name} and/or {rxcui}. Empty idGroup → 404 not charged.
Basex402-v2-mint-rxnorm-lookup.vercel.appfrom $0.021 endpoint - Xx402-v2-mint-ror-org-search.vercel.appSearch & web
ROR research organization search (keyless). POST {q|query}. Empty -> 400 not charged. OpenAlex-institutions/Crossref adjacency disclosed.
Basex402-v2-mint-ror-org-search.vercel.appfrom $0.021 endpoint - Xx402-v2-mint-ripe-prefix-overview.vercel.appOther services
RIPE Stat prefix→ASN/holder overview (keyless). POST {resource}/{prefix?} required. Empty -> 400 not charged. peeringdb-net / whois-rdap-ip adjacency disclosed.
Basex402-v2-mint-ripe-prefix-overview.vercel.appfrom $0.021 endpoint - Xx402-v2-mint-rickandmorty-character.vercel.appSearch & web
Rick and Morty character search (keyless). POST {name|q|query,status?,species?,limit?}. Unpaid empty → 402; after settle empty/invalid → 400 charged:false. Soft disclose tvmaze-search.
Basex402-v2-mint-rickandmorty-character.vercel.appfrom $0.021 endpoint - Xx402-v2-mint-rhea-reaction-search.vercel.appSearch & web
Rhea enzyme reaction search (keyless). POST {q|query}/{ec?}/{limit?}. Empty -> 400 not charged.
Basex402-v2-mint-rhea-reaction-search.vercel.appfrom $0.021 endpoint - Xx402-v2-mint-reactome-pathway-search.vercel.appSearch & web
Reactome pathway search (keyless). POST {q|query}/{types?}. Empty -> 400 not charged.
Basex402-v2-mint-reactome-pathway-search.vercel.appfrom $0.021 endpoint - Xx402-v2-mint-rdap-domain-lookup.vercel.appDeveloper tools
RDAP domain registration/nameserver/status lookup (keyless). POST {domain} required. Empty -> 400 not charged. New RDAP/DNS vertical (low adjacency vs DoH trivia).
Basex402-v2-mint-rdap-domain-lookup.vercel.appfrom $0.021 endpoint - Xx402-v2-mint-rcsb-pdb-lookup.vercel.appOther services
RCSB PDB entry metadata (keyless). POST {pdb_id}. Empty → 404 not charged.
Basex402-v2-mint-rcsb-pdb-lookup.vercel.appfrom $0.021 endpoint - Xx402-v2-mint-public-holidays.vercel.appOther services
Public holidays via Nager.Date (keyless). ISO country + year → holiday list.
Basex402-v2-mint-public-holidays.vercel.appfrom $0.0021 endpoint - Xx402-v2-mint-pubchem-compound.vercel.appOther services
PubChem PUG REST compound name/CID properties (keyless). POST {name} and/or {cid}. Empty → 404 not charged.
Basex402-v2-mint-pubchem-compound.vercel.appfrom $0.021 endpoint - Xx402-v2-mint-pride-project-search.vercel.appSearch & web
EBI PRIDE proteomics project search (keyless). POST {q|query|keyword}/{pageSize?}. Empty -> 400 not charged.
Basex402-v2-mint-pride-project-search.vercel.appfrom $0.021 endpoint - Xx402-v2-mint-postcodes-io.vercel.appImages, audio & video
UK postcodes.io lookup (keyless). POST {postcode}. Unpaid empty → 402; after settle empty/invalid → 400 charged:false. Structured UK postal lane (≠ nominatim/photon geocoder filler; ≠ zip-code-lookup Zippopotam).
Basex402-v2-mint-postcodes-io.vercel.appfrom $0.021 endpoint - Xx402-v2-mint-pokeapi-pokemon.vercel.appOther services
PokéAPI pokemon lookup (keyless). POST {name|id|pokemon}. Unpaid empty → 402; after settle empty/invalid → 400 charged:false. MUST project/trim — never returns full ~309KB dump. Soft disclose dnd5e-spell / steam-appdetails (games).
Basex402-v2-mint-pokeapi-pokemon.vercel.appfrom $0.021 endpoint - Xx402-v2-mint-plos-article-search.vercel.appSearch & web
PLOS Solr article search (keyless). POST {q}/{rows?}/{start?}. Unpaid empty → 402; after settle empty/invalid → 400 charged:false. Disclose adjacency: crossref / doaj / europepmc / pubmed (publisher-search ≠ Crossref/DOAJ/EuropePMC/PubMed primary).
Basex402-v2-mint-plos-article-search.vercel.appfrom $0.021 endpoint - Xx402-v2-mint-photon.vercel.appImages, audio & video
Komoot Photon geocoder (keyless). POST {q|query|text,limit?,lat?,lon?}. Unpaid empty → 402; after settle empty/invalid → 400 charged:false. Soft disclose geocode-search / census-geocode.
Basex402-v2-mint-photon.vercel.appfrom $0.021 endpoint - Xx402-v2-mint-phi-property-check.vercel.appAI & agents
Philadelphia L&I property-maintenance violations (partner wrap of x402-mcp). Refund if partner fails after settle.
Basex402-v2-mint-phi-property-check.vercel.appfrom $0.021 endpoint - Xx402-v2-mint-peeringdb-net-lookup.vercel.appOther services
PeeringDB network/ASN lookup (keyless). POST {asn}/{name?}/{id?}. Empty -> 400 not charged. Distinct peering/IX lane — disclose rdap/ripe adjacency lightly.
Basex402-v2-mint-peeringdb-net-lookup.vercel.appfrom $0.021 endpoint - Xx402-v2-mint-pdbe-entry-lookup.vercel.appOther services
PDBe PDB entry summary (keyless; PDBe/RCSB-adjacent). POST {id|pdb_id|q}. Empty -> 400 not charged.
Basex402-v2-mint-pdbe-entry-lookup.vercel.appfrom $0.021 endpoint - Xx402-v2-mint-pbdb-occs.vercel.appMarkets & finance
Paleobiology Database fossil occurrences list (keyless). POST {taxon_name} (+ optional limit). Unpaid empty → 402; after settle empty/invalid → 400 charged:false. New paleobiology vertical; light disclose macrostrat-geologic (geo defs ≠ PBDB occs).
Basex402-v2-mint-pbdb-occs.vercel.appfrom $0.021 endpoint - Xx402-v2-mint-packagist-package.vercel.appOther services
Composer/Packagist package metadata p2 (keyless). POST {vendor}/{package}. Unpaid empty → 402; after settle empty/invalid → 400 charged:false. PHP package registry lane (≠ npm/pypi/crates).
Basex402-v2-mint-packagist-package.vercel.appfrom $0.021 endpoint - Xx402-v2-mint-owid-grapher-vars.vercel.appData & research
Our World in Data grapher CSV/variables (keyless). POST {chart|slug} (+ optional format/v). Unpaid empty → 402; after settle empty/invalid → 400 charged:false. New OWID research vertical; no live catalog adjacency.
Basex402-v2-mint-owid-grapher-vars.vercel.appfrom $0.021 endpoint - Xx402-v2-mint-osv-vuln-query.vercel.appOther services
OSV.dev vulnerability query (keyless). POST {package:{name,ecosystem},version?}/{commit?}. Empty -> 400 not charged. nist-nvd-cve-lookup adjacency. Native POST api.osv.dev/v1/query (GET 405).
Basex402-v2-mint-osv-vuln-query.vercel.appfrom $0.021 endpoint - Xx402-v2-mint-osint-graph.vercel.appOther services
Public Wikidata relationship graph (≤2 hops). Fixed property list; privacy bounds (no family/contact). Empty+reason → charged:false. Amp port.
Basex402-v2-mint-osint-graph.vercel.appfrom $0.011 endpoint - Xx402-v2-mint-osf-nodes-search.vercel.appSearch & web
OSF nodes search (keyless). POST {title?}/{filter?}/{pageSize?}. Empty -> 400 not charged. openaire/zenodo/dataverse adjacency disclosed.
Basex402-v2-mint-osf-nodes-search.vercel.appfrom $0.021 endpoint - Xx402-v2-mint-orl-property-check.vercel.appAI & agents
Orlando short-term rental license check (partner wrap of x402-mcp). Refund if partner fails after settle.
Basex402-v2-mint-orl-property-check.vercel.appfrom $0.021 endpoint - Xx402-v2-mint-orcid-lookup.vercel.appData & research
ORCID public researcher record (keyless). POST {orcid}. Accept application/json. Miss → 404 not charged.
Basex402-v2-mint-orcid-lookup.vercel.appfrom $0.021 endpoint - Xx402-v2-mint-opentdb-trivia.vercel.appOther services
Open Trivia DB quiz questions (keyless). POST {amount?, category?, difficulty?, type?, encode?}. Unpaid empty → 402; after settle empty/invalid → 400 charged:false. Soft disclose dnd5e-spell (games lane).
Basex402-v2-mint-opentdb-trivia.vercel.appfrom $0.021 endpoint - Xx402-v2-mint-openssf-scorecard.vercel.appCrypto & DeFi
OpenSSF Scorecard repo supply-chain health (keyless). POST {platform}/{org}/{repo} required. Empty -> 400 not charged. osv-vuln-query/nist-nvd-cve-lookup adjacency disclosed.
Basex402-v2-mint-openssf-scorecard.vercel.appfrom $0.021 endpoint - Xx402-v2-mint-openproducts-product-search.vercel.appSearch & web
Open Products Facts product search (keyless). POST {q|query}/{barcode?|code?}. Empty -> 400 not charged.
Basex402-v2-mint-openproducts-product-search.vercel.appfrom $0.021 endpoint - Xx402-v2-mint-openlibrary-search.vercel.appSearch & web
Open Library search.json (keyless). POST {q}/{limit?}/{offset?}/{fields?}. Unpaid empty → 402; after settle empty/invalid → 400 charged:false. No catalog adjacency.
Basex402-v2-mint-openlibrary-search.vercel.appfrom $0.021 endpoint
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