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

io.github.cyanheads/iana-registries-mcp-server · v0.2.1

Measured by MCP Station

Description written by the publisher, not verified

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

Connect

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

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

Tools as reported by the server

• 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 "postgresql"), or `keyword` (words matched against service names and descriptions). Results list every transport (tcp, udp, sctp, dccp) separate
• 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 matched against registered type names and status annotations, e.g. "geo json"; never against file extensions). An exact `type` lookup also
• 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 registered phrase, its class, defining reference with section, and whether it is temporary, obsoleted, or unused; an unassigned code returns fo
• 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 field names and comments). Returns the registration status — permanent, provisional, deprecated, or obsoleted — the Structured Field type w
• 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 names and descriptions). Returns the status — permanent, provisional, or historical — description, references, and well-known URI support.
• 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 `organization` (words matched against organization names). Returns the organization and its OID prefix. Arcs below the enterprise number are ass
• 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-TW", "sr-Latn", "en_US") or `description` (e.g. "Swiss German"). A tag is split into language, extlang, script, region, variant, extension, a
• 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. When more remain, deferred_ids previews the next ten, deferred_count counts the whole remainder, and next_ids_offset continues the same ori
• 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 numbers". Returns the registry and sub-registry ids that iana_get_registry_records reads, with registration procedure and defining documents. Cov
• 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-methods", or "cbor-tags"; an iana.org/assignments URL also works. Filter with `value` (exact match on the key column, or on the column `fie

Tool changes

• 2026-10-18: iana_lookup_port, iana_lookup_media_type, iana_lookup_http_status, iana_lookup_http_field, iana_lookup_uri_scheme, iana_lookup_pen, iana_lookup_language_tag, iana_get_rfc_status, iana_search_registries, iana_get_registry_records
• 2026-10-16: iana_lookup_port, iana_lookup_media_type, iana_lookup_http_status, iana_lookup_http_field, iana_lookup_uri_scheme, iana_lookup_pen, iana_lookup_language_tag, iana_get_rfc_status, iana_search_registries, iana_get_registry_records

Repository · JSON · Text for agents · Registry updated 2026-10-17