io.github.cyanheads/iana-registries-mcp-server

up checked 2026-11-11T09:39:07.249Z

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Publisher-provided description

Find IANA ports, MIME types, HTTP codes/fields, URI schemes, PENs, BCP 47 tags, RFCs, any registry.

Summary by lookupd

Reads and searches IANA registries, including ports, media types, HTTP codes and fields, URI schemes, language tags, PENs and RFC status.

Install

Claude Code, remote (streamable-http)

claude mcp add --transport http iana-registries-mcp-server https://iana-registries.caseyjhand.com/mcp

Claude Code, npm package (stdio)

claude mcp add iana-registries-mcp-server -- npx -y @cyanheads/iana-registries-mcp-server

Claude Code, npm package (stdio)

claude mcp add iana-registries-mcp-server -- npx -y @cyanheads/iana-registries-mcp-server

Codex, remote (streamable-http)

codex mcp add iana-registries-mcp-server --url https://iana-registries.caseyjhand.com/mcp

Codex, npm package (stdio)

codex mcp add iana-registries-mcp-server -- npx -y @cyanheads/iana-registries-mcp-server

Codex, npm package (stdio)

codex mcp add iana-registries-mcp-server -- npx -y @cyanheads/iana-registries-mcp-server

Cursor, remote (streamable-http) → .cursor/mcp.json

{
  "mcpServers": {
    "iana-registries-mcp-server": {
      "url": "https://iana-registries.caseyjhand.com/mcp"
    }
  }
}

Cursor, npm package (stdio) → .cursor/mcp.json

{
  "mcpServers": {
    "iana-registries-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "@cyanheads/iana-registries-mcp-server"
      ]
    }
  }
}

Cursor, npm package (stdio) → .cursor/mcp.json

{
  "mcpServers": {
    "iana-registries-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "@cyanheads/iana-registries-mcp-server"
      ]
    }
  }
}

Other clients: docs. Or tell your agent: Set up lookupd for me: read https://lookupd.com/agent.md and follow it.

Tools (10 tools)

Publisher-provided text

• iana_lookup_port Look up IANA service name and transport protocol port assignments. Pass exactly one of `port` (a number, 0–65535), `service` (an exact service name such as "pos
• iana_lookup_media_type Look up registered media (MIME) types. Pass exactly one of `type` (a full name such as "application/json"; parameters after ";" are ignored) or `keyword` (words
• iana_lookup_http_status Look up an HTTP status code in the IANA registry, or search reason phrases. Pass exactly one of `code` (100–599) or `keyword` (e.g. "too many"). Returns the reg
• iana_lookup_http_field Look up a registered HTTP field (header or trailer) name. Pass exactly one of `name` (case-insensitive, e.g. "Cache-Status") or `keyword` (words matched against
• iana_lookup_uri_scheme Look up a registered URI scheme. Pass exactly one of `scheme` (e.g. "mailto"; a trailing ":" or "://" is ignored) or `keyword` (words matched against scheme nam
• iana_lookup_pen Look up a Private Enterprise Number (PEN). Pass exactly one of `pen` (a number such as 32473, or an OID under 1.3.6.1.4.1 such as 1.3.6.1.4.1.32473.1.2) or `org
• iana_lookup_language_tag Parse and validate a BCP 47 language tag against the IANA Language Subtag Registry, or search subtags by description. Pass exactly one of `tag` (e.g. "zh-Hant-T
• iana_get_rfc_status Get the current status of up to ten distinct RFCs, Internet-Drafts, or BCP/STD/FYI series per page from up to 1,000 input items. Canonical aliases resolve once.
• iana_search_registries Find IANA protocol registries and sub-registries by keyword over their titles and protocol categories, e.g. "tls cipher", "dns resource record", "protocol numbe
• iana_get_registry_records Read records from any IANA XML registry by id, e.g. registry "tls-parameters" with subregistry "tls-parameters-4" (TLS Cipher Suites), "protocol-numbers", "http

Details

• Version: 0.3.0
• Transports: streamable-http, stdio
• Uptime (7 days): 100%
• Median latency: 724 ms
• First indexed: 2026-11-01T09:26:06.819Z
• Last seen in registry: 2026-11-01T09:26:06.847Z
• Repository: https://github.com/cyanheads/iana-registries-mcp-server

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• Last crawl: 2026-11-11T18:39:04.612Z
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