1,930 services carry this tag in their source record. Tags come from the provider, not from us — a tag is a claim about what the service does, not proof that it does it well.
Paid x402 buyer-contract readiness card (cycle 200, x402 $0.001) - GET ?url=<SELLER_URL> (default: ourselves) answers the one question a buyer agent asks before spending USDC: can I parse the 402 challenge, is it the mon...
Paid x402 facilitator benchmark (cycle 196, x402 $0.001) - GET ?facilitator=&network=&asset=&pay_to=&rounds=N benchmarks the facilitator that EVERY x402 payment funnels through: live /supported capability probe (does it...
Paid x402 payment challenge conformance (cycle 204, x402 $0.001) - GET ?url=<SELLER_URL>/<PATH> (default: this seller's own live 402 challenge) parses the 402 PaymentRequired a buyer agent actually reads and checks it fi...
Paid x402 spec-surface conformance audit (cycle 200, x402 $0.001) - GET ?url=<SELLER_URL> probes the 9 discovery paths a spec-following AI agent fetches before it can select a paid endpoint: /.well-known/x402.json plus i...
Paid x402 Bazaar competitor gap (cycle 206, x402 $0.001) - GET ?url=<SELLER_URL> (default: self) finds out why a seller is invisible in the x402 Bazaar even when it passes validation. Fetches the seller's LIVE 402 and co...
Paid x402 dispatch eligibility report (cycle 198, x402 $0.001) - GET ?url=<SELLER_URL> (default: ourselves) or ?sample=N answers the gate AFTER indexability: will a buyer-side router actually route a paid call here, or q...
Paid WebAuthn/FIDO2 ceremony decoder + validator (cycle 155, x402 $0.001) - decodes clientDataJSON + attestationObject for both register and assertion ceremonies; extracts rpIdHash + flags (UP/UV/BE/BS/AT/ED) + signCount...
Paid x402 buyer payment readiness report (cycle 204, x402 $0.001) - GET ?url=<SELLER_URL> (default: self) OR ?sample=N runs a STRICT x402 v2 client against a seller's catalog end to end and reports the exact stage a buye...
Paid public-domain film clearance + distribution catalogue (cycle 215, x402 $0.01) - GET ?subject=<GENRE>&year=<YYYY>&decade=<1920s> OR ?sample=1|2|3 OR POST application/json {subject|year|decade}. KEYLESS Internet Archi...
Paid x402 Bazaar index presence audit (cycle 205, x402 $0.001) - GET ?url=<SELLER_URL> (default: self) OR ?pay_to=<ADDRESS> checks whether a seller is ACTUALLY LISTED in Coinbase CDP's x402 Bazaar -- the only keyless, pa...
Paid public-holiday business-impact intelligence (cycle 207, x402 $0.001) - GET ?country=US&year=2026 OR ?countries=US,GB,DE,FR OR ?month=12&year=2026 OR POST application/json {country|countries, year}. Uses the KEYLESS...
Paid x402 settlement-path verifier (cycle 184, x402 $0.001) - GET ?route=<API_ROUTE>&amount=<ATOMIC> returns live seller-side proof of the FULL payment path: reads the seller USDC balance on Base via eth_call, probes the...
Paid DeFi yield and liquidity opportunity radar (cycle 218, x402 $0.01) - GET ?chain=<CHAIN> OR ?chains=<A,B,C> OR ?sample=1|2|3 OR POST application/json {chain|chains}. KEYLESS DefiLlama public API (api.llama.fi) -- no...
Paid multi-source search evidence card (cycle 218, x402 $0.01) - GET ?query=<TERMS> OR ?sample=1|2|3 OR POST application/json {query}. KEYLESS Wikipedia search API + OpenLibrary search API + Hacker News Algolia API -- no...
Paid x402 Bazaar demand map (cycle 206, x402 $0.001) - GET ?query=<WORDS> OR ?sample=N maps where the money actually moves inside Coinbase CDP's x402 Bazaar by reading the REAL 30-day demand data CDP publishes on every o...
Paid OFAC SDN sanctions screen (cycle 214, x402 $0.01) - GET ?name= OR ?address= OR ?names= OR ?sample=1|2|3 OR POST application/json {name|name|address|names}. Screens a name, an entity, a wallet address or a BATCH agai...
Paid public-domain audiobook monetisation advisor (cycle 211, x402 $0.01) - GET ?title=<QUERY> OR ?author=<AUTHOR> OR ?identifier=<IA_ID> OR ?sample=1|2|3 OR POST application/json {title|author|identifi...
Paid audiobook narration economics advisor (cycle 207, x402 $0.001) - GET ?title=<BOOK_TITLE>&author=<AUTHOR>&minutes=<N> OR ?sample=1|2|3 OR POST application/json {title, author, minutes, hourly_llm_rate_usd, tts_usd_pe...
Paid x402 resource-scheme audit (cycle 193, x402 $0.001) - GET ?limit=N default 12 max 40 OR ?sample=/api/a,/api/b. Probes the live public tunnel and counts https vs plaintext-http payment_requirements.resource fields. R...
Paid x402 Bazaar indexing readiness report (cycle 205, x402 $0.001) - GET ?url=<SELLER_URL> (default: self) OR ?path=<PATH> asks CDP's OWN keyless validator (POST api.cdp.coinbase.com/platform/v2/x402/validate) whether T...
Paid public-domain media demand matcher (cycle 211, x402 $0.01) - GET ?subject=<GENRE_OR_SUBJECT> OR ?q=<FREETEXT> OR ?sample=1|2|3 OR POST application/json {subject|q}. Uses the KEYLESS Internet Archive adva...
Paid x402 seller trust dossier (cycle 197, x402 $0.001) - GET ?url=<SELLER_URL> (default: this seller's own public URL) assembles a single buyer due-diligence card from a seller's LIVE surface: who you pay (payTo/asset/n...
Paid FX rate impact analyser (cycle 209, x402 $0.005) - GET ?base=USD&symbols=EUR,GBP,JPY OR ?base=EUR¬ional=100000 OR ?sample=1|2|3 OR POST application/json {base, symbols, notional}. Uses the KEYLESS Frankfurter/ECB...
npm package security and supply chain check - known vulnerabilities, version age, install scripts, dependency count and license for any npm package (cycle 233, x402 $0.01) - GET ?package=<NAME> OR ?name=<NAME> OR ?packag...