{
 "dataset": "mcpreflight x402 census",
 "version": 1,
 "page": "https://xka0085-byte.github.io/mcpreflight/x402-mcp-payments-data.html",
 "generatedAt": "2026-11-02T13:21:39.344Z",
 "sweepDate": "2026-11-02",
 "definition": {
  "cohortRule": "registry entry whose title, description or URL matches /x402|http-402/i (case-insensitive); rule fixed 2026-10-15",
  "method": "read-only anonymous initialize + tools/list, plus inspection of the HTTP 402 payment document shape",
  "never": [
   "signs",
   "pays",
   "settles",
   "retries payment",
   "uses a private key"
  ],
  "statusMeaning": {
   "PASS": "clean anonymous handshake",
   "AUTH_GATED": "confirmed intentional authentication gate (401 + WWW-Authenticate, or live RFC 9728 metadata)",
   "UNKNOWN": "no anonymous response",
   "FAIL": "response received but handshake broke"
  }
 },
 "headline": {
  "cohort": 1583,
  "registryEndpoints": 35327,
  "cohortSharePct": 4.5,
  "passRatePct": 65.6,
  "registryPassRatePct": 58.6,
  "authGatedPct": 1.9,
  "registryAuthGatedPct": 29,
  "toolsPublished": 23360,
  "endpointsPublishingTools": 1039,
  "sweepDate": "2026-11-02",
  "checkedAt": "2026-11-02T10:13:28.176Z"
 },
 "statusDistribution": {
  "cohort": {
   "PASS": 1039,
   "AUTH_GATED": 30,
   "UNKNOWN": 507,
   "FAIL": 7
  },
  "registry": {
   "PASS": 20701,
   "AUTH_GATED": 10236,
   "UNKNOWN": 4223,
   "FAIL": 167
  }
 },
 "findingCodes": {
  "PROPERTY_DESCRIPTION_MISSING": 16832,
  "STATIC_SCHEMA_CHECKS_PASSED": 568,
  "NO_RESPONSE": 507,
  "AUTH_GATE_DETECTED": 19,
  "AUTH_GATE_VERIFIED": 11,
  "TOOLS_LIST_INVALID": 7,
  "INITIALIZE_RESPONSE_INVALID": 6,
  "TOOL_DESCRIPTION_MISSING": 5,
  "NO_TOOLS": 1
 },
 "weeklySeries": [
  {
   "date": "2026-10-15",
   "cohort": 293,
   "pass": 218,
   "passRate": 74.4,
   "authGated": 0,
   "unknown": 74,
   "fail": 1
  },
  {
   "date": "2026-10-19",
   "cohort": 293,
   "pass": 213,
   "passRate": 72.7,
   "authGated": 2,
   "unknown": 77,
   "fail": 1
  },
  {
   "date": "2026-10-30",
   "cohort": 293,
   "pass": 226,
   "passRate": 77.1,
   "authGated": 4,
   "unknown": 62,
   "fail": 1
  },
  {
   "date": "2026-11-01",
   "cohort": 1583,
   "pass": 1059,
   "passRate": 66.9,
   "authGated": 19,
   "unknown": 501,
   "fail": 4
  },
  {
   "date": "2026-11-02",
   "cohort": 1583,
   "pass": 1039,
   "passRate": 65.6,
   "authGated": 30,
   "unknown": 507,
   "fail": 7
  }
 ],
 "driftSeries": [
  {
   "date": "2026-10-17",
   "cohort": 293,
   "discoverable": 61,
   "resources": 509,
   "real402": 49,
   "drifted": 0
  },
  {
   "date": "2026-10-19",
   "cohort": 293,
   "discoverable": 58,
   "resources": 505,
   "real402": 46,
   "probed": 163,
   "validChallenges": 58,
   "withValid": 27,
   "drifted": 5
  },
  {
   "date": "2026-10-30",
   "cohort": 293,
   "discoverable": 59,
   "resources": 579,
   "real402": 46,
   "probed": 170,
   "validChallenges": 71,
   "withValid": 30,
   "drifted": 34
  },
  {
   "date": "2026-11-02",
   "cohort": 1583,
   "discoverable": 298,
   "resources": 2757,
   "real402": 243,
   "probed": 897,
   "validChallenges": 456,
   "withValid": 164,
   "drifted": 8
  }
 ],
 "comparability": {
  "cohortBreak": "2026-11-01",
  "note": "Rows with different cohort sizes are not strictly comparable: the cohort was 293 endpoints until 2026-10-30 and 1,583 from 2026-11-01 (full-registry filter).",
  "otherCounts": "External x402 ecosystem percentages usually measure listing/discovery success on a different sample; a listing rate and an anonymous-handshake rate are different quantities."
 },
 "files": {
  "cohort": "data/x402-cohort-latest.csv",
  "history": "data/x402-history.csv"
 },
 "citation": "mcpreflight, \"x402 payments in the MCP Registry: a 1,583-endpoint census\", 2026-11-02, https://xka0085-byte.github.io/mcpreflight/x402-mcp-payments-data.html",
 "license": "MIT"
}