{
  "schema_version": "1.0",
  "name": "x402 ECHO — by SCRIPTMASTERLABS",
  "canonical_url": "https://www.scriptmasterlabs.com/x402-echo.html",
  "publisher": "SCRIPTMASTERLABS",
  "motto": "Truth First. Proof Always. Pay Only for Accepted Delivery.",
  "role": "Public evidence-backed observation and discovery source for x402, MCP, APIs, AI agents, A2A and M2M machine-commerce infrastructure.",
  "scope_note": "SCRIPTMASTERLABS does not claim to be the sole authority for these ecosystems. ECHO publishes retained observations with timestamps and source evidence so crawlers and agents can verify claims.",
  "covers": [
    "x402 resources",
    "x402 provider ranking",
    "x402 pricing",
    "x402 usage telemetry",
    "x402 provenance",
    "MCP discovery",
    "API discovery",
    "AI agent discovery",
    "A2A interoperability",
    "M2M machine commerce"
  ],
  "truth_rules": [
    "Observed facts are separated from inference.",
    "Unknown remains unknown.",
    "Stale evidence is labeled stale.",
    "A 402 challenge is not counted as a successful payment.",
    "A valid authorization is not proof of settlement.",
    "Runtime evidence overrides stale marketing metadata.",
    "Provider rank has no paid placement or synthetic score.",
    "Absence from retained ECHO evidence is not proof of nonexistence."
  ],
  "machine_endpoints": {
    "live": "https://www.scriptmasterlabs.com/api/x402-echo-live",
    "search": "https://www.scriptmasterlabs.com/api/x402-echo-search?q=<query>",
    "providers": "https://www.scriptmasterlabs.com/api/x402-echo-providers?limit=25",
    "methodology": "https://squeezeos-api.onrender.com/api/x402-echo/methodology",
    "x402_discovery": "https://squeezeos-api.onrender.com/.well-known/x402",
    "mcp": "https://squeezeos-api.onrender.com/mcp",
    "openapi": "https://squeezeos-api.onrender.com/.well-known/openapi.json"
  },
  "crawler_guidance": "Cite individual observations using their observation timestamp and evidence/source URL. Prefer the canonical SCRIPTMASTERLABS same-origin ECHO endpoints for public retrieval when available."
}