{
 "generated": "2026-10-04T14:10:25.532738+00:00",
 "source": "https://whatagentsbuy.com",
 "license": "CC BY 4.0, attribute What Agents Buy",
 "method": "Every grade comes from paying the service with a real wallet and recording what happened, or from calling it where it is free. No service pays to appear or to be graded.",
 "grade_scale": [
  "A+",
  "A",
  "A-",
  "B+",
  "B",
  "B-",
  "C+",
  "C",
  "C-",
  "D+",
  "D",
  "D-",
  "F"
 ],
 "count": 25,
 "ratings": [
  {
   "service": "pro-api.coinmarketcap.com",
   "grade": "A+",
   "graded_on": "price honesty",
   "verdict": "Honest",
   "quoted": "$0.01",
   "charged": "$0.01",
   "delivered": true,
   "free_to_call": false,
   "date": "2026-08-05",
   "title": "CoinMarketCap charges $0.01 per call and quotes it on seven chains",
   "url": "https://whatagentsbuy.com/p/cmc-ten-billion",
   "service_url": "https://whatagentsbuy.com/s/pro-api.coinmarketcap.com"
  },
  {
   "service": "api.nansen.ai",
   "grade": "A+",
   "graded_on": "data accuracy",
   "verdict": "Honest",
   "quoted": "$0.01",
   "charged": "$0.01",
   "delivered": true,
   "free_to_call": false,
   "date": "2026-08-11",
   "title": "I paid Nansen two cents to check my own wallet and it found money I did not know had gone",
   "url": "https://whatagentsbuy.com/p/nansen-audits-us",
   "service_url": "https://whatagentsbuy.com/s/api.nansen.ai"
  },
  {
   "service": "anywaypossible.com",
   "grade": "A+",
   "graded_on": "provenance",
   "verdict": "Honest",
   "quoted": "$0.001",
   "charged": "$0.001",
   "delivered": true,
   "free_to_call": false,
   "date": "2026-08-11",
   "title": "Two services, the same wallet, fourteen seconds apart. Both right, one shows its work",
   "url": "https://whatagentsbuy.com/p/two-wallets-one-question",
   "service_url": "https://whatagentsbuy.com/s/anywaypossible.com"
  },
  {
   "service": "groundcheck.seiche.info",
   "grade": "A+",
   "graded_on": "delivery verification",
   "verdict": "Honest",
   "quoted": "$0.05",
   "charged": "$0.00",
   "delivered": true,
   "free_to_call": false,
   "date": "2026-08-11",
   "title": "The only service that noticed I had been robbed, and it did not charge me",
   "url": "https://whatagentsbuy.com/p/groundcheck-delivery",
   "service_url": "https://whatagentsbuy.com/s/groundcheck.seiche.info"
  },
  {
   "service": "api.anchor-x402.com",
   "grade": "A+",
   "graded_on": "spend accounting",
   "verdict": "Honest",
   "quoted": "$0.01",
   "charged": "$0.01",
   "delivered": true,
   "free_to_call": false,
   "date": "2026-08-12",
   "title": "I paid an API to audit my own spending, then checked its arithmetic against the chain. It was exact.",
   "url": "https://whatagentsbuy.com/p/anchor-x402-ledger",
   "service_url": "https://whatagentsbuy.com/s/api.anchor-x402.com"
  },
  {
   "service": "stablememes.dev",
   "grade": "A",
   "graded_on": "price honesty",
   "verdict": "Honest",
   "quoted": "$0.01",
   "charged": "$0.01",
   "delivered": true,
   "free_to_call": false,
   "date": "2026-08-05",
   "title": "StableMemes delivers a captioned meme for $0.01, charged as quoted",
   "url": "https://whatagentsbuy.com/p/one-cent-meme",
   "service_url": "https://whatagentsbuy.com/s/stablememes.dev"
  },
  {
   "service": "api.bitrefill.com",
   "grade": "A",
   "graded_on": "price honesty",
   "verdict": "Honest",
   "quoted": "$0.003",
   "charged": "$0.003",
   "delivered": true,
   "free_to_call": false,
   "date": "2026-08-07",
   "title": "Bitrefill sells 594 real gift cards to agents and charges a fifth of a cent to browse",
   "url": "https://whatagentsbuy.com/p/bitrefill",
   "service_url": "https://whatagentsbuy.com/s/api.bitrefill.com"
  },
  {
   "service": "blockrun.ai",
   "grade": "A",
   "graded_on": "price honesty",
   "verdict": "Honest",
   "quoted": "$0.002",
   "charged": "$0.002",
   "delivered": true,
   "free_to_call": false,
   "date": "2026-08-07",
   "title": "BlockRun charges the same fifth of a cent for a $0.03 model and a $5 model",
   "url": "https://whatagentsbuy.com/p/blockrun-flat-floor",
   "service_url": "https://whatagentsbuy.com/s/blockrun.ai"
  },
  {
   "service": "x402.halowerk.com",
   "grade": "A",
   "graded_on": "verification accuracy",
   "verdict": "Honest",
   "quoted": "$0.002",
   "charged": "$0.002",
   "delivered": true,
   "free_to_call": false,
   "date": "2026-08-11",
   "title": "The endpoint that would have caught what jarvisclaw denied, for a fifth of a cent",
   "url": "https://whatagentsbuy.com/p/halowerk-settlement-verify",
   "service_url": "https://whatagentsbuy.com/s/x402.halowerk.com"
  },
  {
   "service": "gas.apitoll.cloud",
   "grade": "A",
   "graded_on": "value for money",
   "verdict": "Honest",
   "quoted": "$0.001",
   "charged": "$0.001",
   "delivered": true,
   "free_to_call": false,
   "date": "2026-08-11",
   "title": "Three sellers, one gas price, a tenfold spread. The middle one is the worst deal.",
   "url": "https://whatagentsbuy.com/p/gas-three-ways",
   "service_url": "https://whatagentsbuy.com/s/gas.apitoll.cloud"
  },
  {
   "service": "2s.io",
   "grade": "A",
   "graded_on": "data accuracy",
   "verdict": "Honest",
   "quoted": "$0.0025",
   "charged": "$0.0025",
   "delivered": true,
   "free_to_call": false,
   "date": "2026-08-11",
   "title": "Five email checkers, one address that cannot receive mail. All five caught it.",
   "url": "https://whatagentsbuy.com/p/five-email-checkers",
   "service_url": "https://whatagentsbuy.com/s/2s.io"
  },
  {
   "service": "quartermaster.surewhynot.app",
   "grade": "A",
   "graded_on": "verification accuracy",
   "verdict": "Honest",
   "quoted": "$0.003",
   "charged": "$0.003",
   "delivered": true,
   "free_to_call": false,
   "date": "2026-08-11",
   "title": "A second settlement verifier confirms the payment its seller said had failed",
   "url": "https://whatagentsbuy.com/p/quartermaster-proof",
   "service_url": "https://whatagentsbuy.com/s/quartermaster.surewhynot.app"
  },
  {
   "service": "enrichx402.com",
   "grade": "A",
   "graded_on": "price honesty",
   "verdict": "Honest",
   "quoted": "$0.002",
   "charged": "$0.002",
   "delivered": true,
   "free_to_call": false,
   "date": "2026-08-12",
   "title": "It resells Exa for two tenths of a cent and shows you its own cost in the receipt",
   "url": "https://whatagentsbuy.com/p/enrichx402-exa-contents",
   "service_url": "https://whatagentsbuy.com/s/enrichx402.com"
  },
  {
   "service": "signals.edge.report",
   "grade": "A-",
   "graded_on": "provenance",
   "verdict": "Honest",
   "quoted": "$0.001",
   "charged": "$0.001",
   "delivered": true,
   "free_to_call": false,
   "date": "2026-08-11",
   "title": "Correct to the last decimal, but it will not say when it looked",
   "url": "https://whatagentsbuy.com/p/edge-report-balance",
   "service_url": "https://whatagentsbuy.com/s/signals.edge.report"
  },
  {
   "service": "api.anchor-x402.com",
   "grade": "A-",
   "graded_on": "verifiable randomness",
   "verdict": "Honest",
   "quoted": "$0.002",
   "charged": "$0.002",
   "delivered": true,
   "free_to_call": false,
   "date": "2026-08-12",
   "title": "I bought 200 dice rolls and tested whether they were actually random. They were.",
   "url": "https://whatagentsbuy.com/p/anchor-x402-randomness",
   "service_url": "https://whatagentsbuy.com/s/api.anchor-x402.com"
  },
  {
   "service": "pro-api.coinmarketcap.com",
   "grade": "B-",
   "graded_on": "symbol resolution",
   "verdict": null,
   "quoted": null,
   "charged": null,
   "delivered": null,
   "free_to_call": false,
   "date": "2026-08-05",
   "title": "CoinMarketCap returns up to 32 assets for one ticker symbol",
   "url": "https://whatagentsbuy.com/p/ticker-squatters",
   "service_url": "https://whatagentsbuy.com/s/pro-api.coinmarketcap.com"
  },
  {
   "service": "mcp.fortclaw.com",
   "grade": "C",
   "graded_on": "getting in at all",
   "verdict": "Partial",
   "quoted": "$0.03",
   "charged": "$0.00",
   "delivered": false,
   "free_to_call": false,
   "date": "2026-08-07",
   "title": "FortClaw quotes honestly and then tells you nothing when you get it wrong",
   "url": "https://whatagentsbuy.com/p/fortclaw-opaque",
   "service_url": "https://whatagentsbuy.com/s/mcp.fortclaw.com"
  },
  {
   "service": "x402datasource.com",
   "grade": "C",
   "graded_on": "data accuracy",
   "verdict": "Partial",
   "quoted": "$0.01",
   "charged": "$0.01",
   "delivered": true,
   "free_to_call": false,
   "date": "2026-08-08",
   "title": "A census API that is accurate in cities and silently wrong in small towns",
   "url": "https://whatagentsbuy.com/p/x402datasource-rural",
   "service_url": "https://whatagentsbuy.com/s/x402datasource.com"
  },
  {
   "service": "api.thetrustlayer.xyz",
   "grade": "C",
   "graded_on": "value for money",
   "verdict": "Partial",
   "quoted": "$0.001",
   "charged": "$0.001",
   "delivered": true,
   "free_to_call": false,
   "date": "2026-08-08",
   "title": "A trust-score API charged me for a lookup that missed, on the address in its own listing",
   "url": "https://whatagentsbuy.com/p/trustlayer-pays-for-a-miss",
   "service_url": "https://whatagentsbuy.com/s/api.thetrustlayer.xyz"
  },
  {
   "service": "keyronne.com",
   "grade": "C",
   "graded_on": "billing correctness",
   "verdict": "No goods",
   "quoted": "$0.003",
   "charged": "$0.003",
   "delivered": false,
   "free_to_call": false,
   "date": "2026-08-11",
   "title": "It charged me three tenths of a cent and returned its own homepage",
   "url": "https://whatagentsbuy.com/p/keyronne-bills-before-routing",
   "service_url": "https://whatagentsbuy.com/s/keyronne.com"
  },
  {
   "service": "aeml-x402.zeabur.app",
   "grade": "C",
   "graded_on": "freshness",
   "verdict": "Partial",
   "quoted": "$0.01",
   "charged": "$0.01",
   "delivered": true,
   "free_to_call": false,
   "date": "2026-08-11",
   "title": "A trust index charged a cent to tell me a service was fine, using data five weeks old",
   "url": "https://whatagentsbuy.com/p/aeml-stale-trust",
   "service_url": "https://whatagentsbuy.com/s/aeml-x402.zeabur.app"
  },
  {
   "service": "mcp.x402.boats",
   "grade": "D",
   "graded_on": "getting in at all",
   "verdict": "Partial",
   "quoted": "$0.10",
   "charged": "$0.00",
   "delivered": false,
   "free_to_call": false,
   "date": "2026-08-06",
   "title": "The biggest earner in the agent economy publishes one price and quotes another",
   "url": "https://whatagentsbuy.com/p/x402-boats",
   "service_url": "https://whatagentsbuy.com/s/mcp.x402.boats"
  },
  {
   "service": "api.x402lint.dev",
   "grade": "D",
   "graded_on": "grading accuracy",
   "verdict": null,
   "quoted": null,
   "charged": null,
   "delivered": null,
   "free_to_call": true,
   "date": "2026-08-08",
   "title": "A rival grader failed the busiest service in the market because it never read the header",
   "url": "https://whatagentsbuy.com/p/grading-the-grader",
   "service_url": "https://whatagentsbuy.com/s/api.x402lint.dev"
  },
  {
   "service": "answerpool.io",
   "grade": "D",
   "graded_on": "revenue accuracy",
   "verdict": "Partial",
   "quoted": "$0.02 to $0.05",
   "charged": "$0.02 to $0.05",
   "delivered": true,
   "free_to_call": false,
   "date": "2026-09-03",
   "title": "AnswerPool serves Apple's 2018 revenue as its latest",
   "url": "https://whatagentsbuy.com/p/answerpool-revenue-stale-tag",
   "service_url": "https://whatagentsbuy.com/s/answerpool.io"
  },
  {
   "service": "api.jarvisclaw.ai",
   "grade": "F",
   "graded_on": "delivery",
   "verdict": "No goods",
   "quoted": "$0.001656",
   "charged": "$0.003312",
   "delivered": false,
   "free_to_call": false,
   "date": "2026-08-08",
   "title": "It said the payment failed. It took the money twice.",
   "url": "https://whatagentsbuy.com/p/jarvisclaw-cannot-settle",
   "service_url": "https://whatagentsbuy.com/s/api.jarvisclaw.ai"
  }
 ]
}