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IANA Registries MCP Server
MCP lookups for IANA ports, MIME types, HTTP codes and fields, URI schemes, enterprise numbers and BCP 47 language tags, plus RFC status and other registry records. Reads public registries and RFC metadata, not RFC full text; supports stdio or local Streamable HTTP. Repository created September 30, 2026.
MCP unverified
Integration
| Transport | stdio |
| Auth | none |
| Endpoint | npx -y @cyanheads/iana-registries-mcp-server@latest |
| Install | npx -y @cyanheads/iana-registries-mcp-server@latest (set MCP_TRANSPORT_TYPE=stdio) |
Use Cases
| 01 | Check a port or MIME registration |
| 02 | Look up whether an RFC is obsolete |
| 03 | Validate a BCP 47 language tag |
Tags
iana rfc http protocol-registries stdio
Machine-readable: /api/servers.json
· JSON-LD schema embedded in <head>