Evidence row 23279

What was observed

{
  "endpoints": [
    [
      "mcp",
      "https://tango.dev/mcp"
    ],
    [
      "web",
      "https://tango.dev/"
    ]
  ],
  "name": "Tango",
  "owner_address": null,
  "raw": {
    "_meta": {
      "io.modelcontextprotocol.registry/official": {
        "isLatest": true,
        "publishedAt": "2026-08-11T02:27:43.540764Z",
        "status": "active",
        "statusChangedAt": "2026-08-11T02:27:43.540764Z",
        "updatedAt": "2026-08-11T02:27:43.540764Z"
      }
    },
    "server": {
      "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
      "_meta": {
        "io.modelcontextprotocol.registry/publisher-provided": {
          "dev.tango": {
            "authMethods": [
              "oauth2.1",
              "api-key"
            ],
            "authNote": "OAuth 2.1 is the recommended connect path (auto-negotiated on first call; no header needed). API-key fallback: send header X-Tango-API-Key: <your-tango-api-key>.",
            "categories": [
              "government",
              "govcon",
              "procurement",
              "federal",
              "contracts",
              "data-api"
            ],
            "dataDomains": [
              "contracts",
              "opportunities",
              "entities",
              "idvs",
              "otas",
              "protests",
              "forecasts",
              "subawards",
              "budget-accounts",
              "vehicles",
              "lcats",
              "gsa-elibrary",
              "it-dashboard"
            ],
            "docsUrl": "https://tango.dev/docs",
            "longDescription": "Tango gives AI agents structured, real-time access to the full federal procurement graph — contracts, opportunities, entities, IDVs, OTAs, protests, subawards, forecasts, budget accounts, vehicles, GSA eLibrary, and more — behind one auth boundary. No screen-scraping, no stitching together government APIs. Use it from Claude, Cursor, the OpenAI Responses API, or any MCP-compatible client.",
            "tagline": "Build something. We'll handle the data.",
            "tools": [
              "search",
              "search_opportunities",
              "resolve",
              "get_details",
              "fetch_api_docs"
            ]
          }
        }
      },
      "description": "MCP access to the U.S. federal procurement graph: contracts, opportunities, entities, and more.",
      "name": "dev.tango/tango",
      "remotes": [
        {
          "type": "streamable-http",
          "url": "https://tango.dev/mcp"
        }
      ],
      "title": "Tango",
      "version": "1.0.1",
      "websiteUrl": "https://tango.dev"
    }
  },
  "source": "mcp_registry",
  "summary": "MCP access to the U.S. federal procurement graph: contracts, opportunities, entities, and more."
}

What the leaf hashes

{"body":"e1defa9201ff085a38a250109c61afa4ac929351ba9693b4c1198d3a1c73eddd","id":23279,"kind":"listing","method":"baseline/1","observed_us":1793025350621336,"prev":null,"subject":"mcp_registry:dev.tango/tango","subject_kind":"source_record"}

Proof

Its day has not closed yet. A day closes ten minutes after midnight UTC; the proof appears here then.