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Tango

R2· OAuth, once

MCP access to the U.S. federal procurement graph: contracts, opportunities, entities, and more.

v1.0.1 · active · website · descriptor JSON · versions

An agent can connect after a one-time OAuth consent by a human.Remote endpoint behind OAuth 2. Tokens stay with the agent; the registry only exposes the authorization metadata.
Quality83good
Trust80of 100
Uptime, 30 days99%
Latency p50328 ms

Connect

8 clients · secrets stay placeholders
{
  "mcpServers": {
    "tango": {
      "type": "http",
      "url": "https://tango.dev/mcp"
    }
  }
}
claude mcp add --transport http tango https://tango.dev/mcp
[mcp_servers.tango]
url = "https://tango.dev/mcp"
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "tango": {
      "type": "remote",
      "url": "https://tango.dev/mcp",
      "enabled": true
    }
  }
}
{
  "mcpServers": {
    "tango": {
      "type": "http",
      "url": "https://tango.dev/mcp"
    }
  },
  "deeplink": "cursor://anysphere.cursor-deeplink/mcp/install?name=tango&config=eyJ0eXBlIjoiaHR0cCIsInVybCI6Imh0dHBzOi8vdGFuZ28uZGV2L21jcCJ9"
}
{
  "servers": {
    "tango": {
      "type": "http",
      "url": "https://tango.dev/mcp"
    }
  }
}
{
  "mcpServers": {
    "tango": {
      "httpUrl": "https://tango.dev/mcp"
    }
  }
}
extensions:
  "tango":
    enabled: true
    name: "tango"
    type: streamable_http
    uri: "https://tango.dev/mcp"
    timeout: 300

Quality 83 / 100good

protocoln/a · weight 25
  • n/a
    protocol.modern, protocol.stateless, protocol.transport, protocol.list_ttlno remote answered a protocol handshake (not probed yet, unreachable, or local-only)
authorization83 · weight 15
  • pass
    auth.prmProtected Resource Metadata (RFC 9728) published
  • pass
    auth.as_metadataauthorization server metadata reachable
  • warn
    auth.cimdonly Dynamic Client Registration, deprecated in 2026-07-28 in favour of CIMD
  • n/a
    auth.secret_in_urlno templated URL
tool hygienen/a · weight 30
  • n/a
    tools.descriptions, tools.description_length, tools.schemas, tools.annotations, tools.directory_hints, tools.token_cost, tools.api_dumptool list unknown (behind auth, not probed, or empty)
stabilityn/a · weight 15
  • n/a
    stability.changes, stability.rug_pulltool list unknown
dependenciesn/a · weight 15
  • n/a
    deps.known_vulns, deps.mcp_sdk_version, deps.resolvableno npm or PyPI package

Tool list unknown · checked 2026-10-19 13:37 UTC

Tool changes

No tool definition changes recorded. A server's first observation is its baseline; later probes record what changes.

Checks run on what our credential-free, read-only probes observe; tools are never called and no code audit is performed. How it is computed.

Trust 80 / 100

no-repository
provenance55
liveness100
freshness85
hygiene80

+dns-namespace +website +reachable +uptime-99% ~updated-69d-ago -no-repository

Derived from observable signals (official registry feed and our own credential-free probes); no code audit performed. How it is computed.

Endpoints

remoteauthreachableuptime 30dp50protocollast ok
https://tango.dev/mcp streamable-httpoauth2 AS: https://tango.makegov.comyes99%328 ms–2026-10-19

Tools (0)

No tools observed. Tools appear once a credential-free probe can list them.

Schemas: list_tools.

Similar MCP servers

Official server.json
{
  "name": "dev.tango/tango",
  "_meta": {
    "io.modelcontextprotocol.registry/publisher-provided": {
      "dev.tango": {
        "tools": [
          "search",
          "search_opportunities",
          "resolve",
          "get_details",
          "fetch_api_docs"
        ],
        "docsUrl": "https://tango.dev/docs",
        "tagline": "Build something. We'll handle the data.",
        "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"
        ],
        "authMethods": [
          "oauth2.1",
          "api-key"
        ],
        "dataDomains": [
          "contracts",
          "opportunities",
          "entities",
          "idvs",
          "otas",
          "protests",
          "forecasts",
          "subawards",
          "budget-accounts",
          "vehicles",
          "lcats",
          "gsa-elibrary",
          "it-dashboard"
        ],
        "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."
      }
    }
  },
  "title": "Tango",
  "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
  "remotes": [
    {
      "url": "https://tango.dev/mcp",
      "type": "streamable-http"
    }
  ],
  "version": "1.0.1",
  "websiteUrl": "https://tango.dev",
  "description": "MCP access to the U.S. federal procurement graph: contracts, opportunities, entities, and more."
}