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8 clients · secrets stay placeholders

JSON (mcpServers)Claude CodeCodexOpenCodeCursorVS CodeGemini CLIGoose

{
  "mcpServers": {
    "subdomains": {
      "type": "http",
      "url": "https://api.subdomain.app/mcp"
    }
  }
}

claude mcp add --transport http subdomains https://api.subdomain.app/mcp

[mcp_servers.subdomains]
url = "https://api.subdomain.app/mcp"

{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "subdomains": {
      "type": "remote",
      "url": "https://api.subdomain.app/mcp",
      "enabled": true
    }
  }
}

{
  "mcpServers": {
    "subdomains": {
      "type": "http",
      "url": "https://api.subdomain.app/mcp"
    }
  },
  "deeplink": "cursor://anysphere.cursor-deeplink/mcp/install?name=subdomains&config=eyJ0eXBlIjoiaHR0cCIsInVybCI6Imh0dHBzOi8vYXBpLnN1YmRvbWFpbi5hcHAvbWNwIn0%3D"
}

{
  "servers": {
    "subdomains": {
      "type": "http",
      "url": "https://api.subdomain.app/mcp"
    }
  }
}

{
  "mcpServers": {
    "subdomains": {
      "httpUrl": "https://api.subdomain.app/mcp"
    }
  }
}

extensions:
  "subdomains":
    enabled: true
    name: "subdomains"
    type: streamable_http
    uri: "https://api.subdomain.app/mcp"
    timeout: 300

Quality 85 / 100good

protocol75 · weight 25

warn
protocol.modernnewest supported version is 2025-11-25; 2026-07-28 not supported, older versions are deprecated until 2027-07-28
n/a
protocol.statelessonly applies to 2026-07-28 servers
pass
protocol.transportstreamable HTTP
n/a
protocol.list_ttlonly applies to 2026-07-28 servers

authorizationn/a · weight 15

n/a
auth.prm, auth.as_metadata, auth.cimdno remote uses OAuth
n/a
auth.secret_in_urlno templated URL

tool hygiene86 · weight 30

pass
tools.descriptionsevery tool has a description
pass
tools.description_lengthdescriptions are concise
pass
tools.schemasevery tool has an object input schema
pass
tools.annotations2 of 2 tools declare readOnlyHint or destructiveHint
fail
tools.directory_hintsno tool declares all four of readOnlyHint, destructiveHint, idempotentHint and openWorldHint; missing: find_subdomains (destructiveHint); count_subdomains (destructiveHint)
pass
tools.token_costabout 472 tokens to load every tool
pass
tools.api_dumptools are not a one-to-one API dump

stability100 · weight 15

pass
stability.changesno tool changes in 30 days
pass
stability.rug_pullno tool changed its meaning under the same name

dependenciesn/a · weight 15

n/a
deps.known_vulns, deps.mcp_sdk_version, deps.resolvableno npm or PyPI package

2 tools, about 472 tokens to load them all · tool set bf2594d14555 · checked 2026-10-20 20:14 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 75 / 100

no-repository

provenance55

liveness98

freshness65

hygiene80

+dns-namespace +website +reachable +uptime-96% ~updated-116d-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

remote	auth	reachable	uptime 30d	p50	protocol	last ok
`https://api.subdomain.app/mcp` streamable-http	none	yes	96%	755 ms	2025-11-25	2026-10-20

Tools (2)

count_subdomainsread-only Return only the total number of distinct subdomains known for a domain — no list. Cheap and low-token. Use when the user asks "how many subdomains" or you only need the size of the attack surface. Count includes historic subdomains that may no longer be live. It is a point-in-time figure that changes over time, so treat it as current-as-of-query, not a fixed value.

find_subdomainsread-only List known subdomains (hostnames) of a root domain. Data is passive (not active scanning): results are historic observations and may include subdomains that no longer resolve or are no longer live. Results are a point-in-time snapshot that changes over time as new subdomains are observed — re-query rather than caching the result. Use for attack-surface mapping, security recon, asset inventory, or SEO host discovery. Hostnames are returned most-recently-seen first. The response always reports `total` (full distinct count known) and a `truncated` flag, so you can tell when more exist beyond `limit`.

Schemas: list_tools.

Similar MCP servers

Official server.json

{
  "name": "app.subdomain/subdomains",
  "title": "Subdomain API",
  "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
  "remotes": [
    {
      "url": "https://api.subdomain.app/mcp",
      "type": "streamable-http"
    }
  ],
  "version": "1.0.1",
  "websiteUrl": "https://subdomain.app",
  "description": "Find known subdomains of a domain. Passive data; may include historic entries. List or count."
}