io.github.cyanheads/iana-registries-mcp-server
iana-registries-mcp-server
Find IANA ports, MIME types, HTTP codes/fields, URI schemes, PENs, BCP 47 tags, RFCs, any registry.
alive probed 2026-10-05 · HTTP 200
10tools
7.3ktokens in Claude Opus 5.5
7.5ktokens in Claude Code
3.7 %of a 200k context window
4.6ko200k_base estimate
276 msto initialize
117 msto list tools
- Endpoint
- https://iana-registries.caseyjhand.com/mcp (streamable-http)
- Host
- iana-registries.caseyjhand.com
- Protocol
- 2025-11-25
- Reports itself as
- iana-registries-mcp-server 0.2.0
- Capabilities
- logging, prompts, resources, tools
- Instructions
- 1 679 characters
- Claude count
- Claude Opus 5.5, measured 2026-10-05. Counted again when the tool definitions change. Method.
- Repository
- https://github.com/cyanheads/iana-registries-mcp-server
- Registry
- active, updated 2026-10-02 · registry entry
- Reachable
- 6 of the last 6 probes
Most expensive tools
| Tool | Tokens (o200k) | Share of this server |
|---|---|---|
| iana_get_registry_records | 936 | 20 % |
| iana_get_rfc_status | 520 | 11 % |
| iana_lookup_media_type | 506 | 11 % |
| iana_lookup_port | 491 | 11 % |
| iana_lookup_language_tag | 472 | 10 % |
History
We add a row when the result changes. A server with no change keeps its last row.
| Probed | Result | Init | Tools | Claude | o200k |
|---|---|---|---|---|---|
| 2026-10-05 14:39 | alive | 276 ms | 10 | 7.3k | 4.6k |
| 2026-10-05 00:33 | alive | 191 ms | 10 | 4.6k | |
| 2026-10-04 10:04 | alive | 421 ms | 10 | 4.6k | |
| 2026-10-04 07:57 | alive | 267 ms | 10 | 4.6k | |
| 2026-10-03 20:37 | alive | 777 ms | 10 | 4.6k | |
| 2026-10-03 17:53 | alive | 612 ms | 10 | 4.6k |
Badge and feed
[](https://mcpcost.ulehla.dev/s/io.github.cyanheads/iana-registries-mcp-server)
An entry for every probe that changed the result, the tool count or the token cost: Atom feed. Add it to a feed reader or a Slack RSS app to hear when the server stops answering or its tool set grows.