{
  "source": "https://24klabs.ai/graveyard",
  "site": "https://24klabs.ai",
  "generated": "2026-09-13",
  "count": 4,
  "still_listed": 540,
  "returned_to_shelf": 0,
  "method": "Every listing is knocked on a nightly sweep. Two consecutive failures, or one hard DNS failure, moves an entry here. The clock starts at the first failed knock. An entry that answers again returns to the live shelf automatically and keeps its history.",
  "reads": {
    "measurement": "down_days is the number of days between the first failed knock and the generated date. It says an endpoint did not answer us. It does not say a business is gone, and no field here asserts that.",
    "null_last_answered": "last_answered is null when the record cannot separate an answer from a failure for that row. Null means unknown, not never."
  },
  "entries": [
    {
      "name": "AgentIndex",
      "url": "https://agentndx-production.up.railway.app/.well-known/x402",
      "section": "tools",
      "section_label": "Tools & Utilities",
      "description": "Unified search across 15,000+ MCP services, A2A agents, and x402 APIs from 5 registries (Smithery, official MCP, GitHub, Bazaar, A2A). x402 paid search ($0.005), analyze ($0.05), trending ($0.10).",
      "first_failed": "2026-08-21",
      "down_days": 23,
      "last_answered": null,
      "first_listed": "2026-04-27",
      "returned": null,
      "listing": "https://24klabs.ai/listing/agentindex/"
    },
    {
      "name": "OpenClaw Discovery Index",
      "url": "https://x402search.xyz",
      "section": "tools",
      "section_label": "Tools & Utilities",
      "description": "x402-gated search engine for 13,000+ x402-enabled APIs indexed from CDP Bazaar. $0.01 USDC per search on Base.",
      "first_failed": "2026-08-21",
      "down_days": 23,
      "last_answered": null,
      "first_listed": "2026-04-27",
      "returned": null,
      "listing": "https://24klabs.ai/listing/openclaw-discovery-index/"
    },
    {
      "name": "Visibility AI Audit API",
      "url": "https://visibility.gleefulai.com",
      "section": "apis",
      "section_label": "APIs & Services",
      "description": "AI-visibility and AEO audit for websites: agent-readiness scoring (llms.txt, schema, bot access, FAQ), generated fixes, and competitor gap analysis. Pay-per-call USDC on Base via x402, no API keys. ([OpenAPI](https://visibility.gleefulai.com/openapi.json)) ([Docs](https://visibility.gleefulai.com/docs))",
      "first_failed": "2026-08-21",
      "down_days": 23,
      "last_answered": null,
      "first_listed": "2026-07-29",
      "returned": null,
      "listing": "https://24klabs.ai/listing/visibility-ai-audit-api/"
    },
    {
      "name": "Public Tenders ES/EU",
      "url": "https://public-tenders-es-eu-325572559480.us-central1.run.app",
      "section": "apis",
      "section_label": "APIs & Services",
      "description": "Normalized search over public-sector tenders published in TED (EU official procurement notices), covering Spain plus the rest of the EU above the EU publication threshold, filterable by country/keyword/CPV code/recency. $0.01 USDC on Base Sepolia (testnet) via x402. Example: `POST /search-public-tenders {}`. ([OpenAPI](https://public-tenders-es-eu-325572559480.us-central1.run.app/openapi.json)) ([Agent Card](https://public-tenders-es-eu-325572559480.us-central1.run.app/.well-known/agent-card.json)) ([GitHub](https://github.com/nexus-mcp-infra/public-tenders-es-eu))",
      "first_failed": "2026-08-25",
      "down_days": 19,
      "last_answered": null,
      "first_listed": "2026-08-25",
      "returned": null,
      "listing": "https://24klabs.ai/listing/public-tenders-es-eu/"
    }
  ]
}