iana-registries-mcp-server

An MCP server that provides tools to look up IANA protocol registries, including ports, media types, HTTP status codes, URI schemes, enterprise numbers, and language tags. It also allows checking RFC status and searching any IANA registry. It supports STDIO or Streamable HTTP transports and requires no API key.

Package and access

Local package with source-attributed installation metadata. Koskamo does not execute packages during review.

Community listingLocal stdioSource reviewed; not executedPublished by cyanheads

Vendor documentation

What you can do with it

Look up IANA ports by number or service name
Check HTTP status codes and registered header fields
Validate and canonicalize BCP 47 language tags
Search and read any IANA registry via keyword

Source and maintenance

Community listingRegistry 0.2.1

mcp-registry: io.github.cyanheads/iana-registries-mcp-server@0.2.1 Source repository

Maintenance checked: Oct 31, 2026, 10:59 PM UTC

Packages and installation

Source-provided package data. Koskamo has not executed or live-probed this package.

@cyanheads/iana-registries-mcp-server 0.2.1

npmnpx

@cyanheads/iana-registries-mcp-server package definition

{
  "version": "0.2.1",
  "transport": "stdio",
  "identifier": "@cyanheads/iana-registries-mcp-server",
  "runtimeHint": "npx",
  "registryType": "npm",
  "registryBaseUrl": "https://registry.npmjs.org",
  "environmentVariables": [
    {
      "name": "MCP_LOG_LEVEL",
      "format": "string",
      "default": "info",
      "description": "Sets the minimum log level for output (e.g., 'debug', 'info', 'warn')."
    }
  ]
}

Tools

Reported by the attributed source; not independently observed by Koskamo.

No tool definitions available.

Connect from your client

Each snippet configures the same source-provided package; replace placeholders before use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Cursor

Merge this local stdio configuration, replace every placeholder environment value, and restart Cursor. Koskamo has not executed this package.

Cursor configuration

{
  "mcpServers": {
    "iana-registries-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "@cyanheads/iana-registries-mcp-server@0.2.1"
      ],
      "env": {
        "MCP_LOG_LEVEL": "<YOUR_MCP_LOG_LEVEL>"
      }
    }
  }
}

Cline

Merge this local stdio configuration, replace every placeholder environment value, and restart Cline. Koskamo has not executed this package.

Cline configuration

{
  "mcpServers": {
    "iana-registries-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "@cyanheads/iana-registries-mcp-server@0.2.1"
      ],
      "env": {
        "MCP_LOG_LEVEL": "<YOUR_MCP_LOG_LEVEL>"
      }
    }
  }
}

VS Code

Merge this local stdio configuration, replace every placeholder environment value, and restart VS Code. Koskamo has not executed this package.

VS Code configuration

{
  "servers": {
    "iana-registries-mcp-server": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@cyanheads/iana-registries-mcp-server@0.2.1"
      ],
      "env": {
        "MCP_LOG_LEVEL": "<YOUR_MCP_LOG_LEVEL>"
      }
    }
  }
}

Claude Desktop

Merge this local stdio configuration, replace every placeholder environment value, and restart Claude Desktop. Koskamo has not executed this package.

Claude Desktop configuration

{
  "mcpServers": {
    "iana-registries-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "@cyanheads/iana-registries-mcp-server@0.2.1"
      ],
      "env": {
        "MCP_LOG_LEVEL": "<YOUR_MCP_LOG_LEVEL>"
      }
    }
  }
}

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