com.realworldapis/realworldapis
RealWorldAPIs
Evidence-first registry of real-world APIs for AI agents, with verified metadata and comparison.
alive probed 2026-10-06 · HTTP 200
6tools
4.6ktokens in Claude Opus 5.5
4.7ktokens in Claude Code
2.3 %of a 200k context window
2.6ko200k_base estimate
419 msto initialize
130 msto list tools
- Endpoint
- https://mcp.realworldapis.com/mcp (streamable-http)
- Host
- mcp.realworldapis.com
- Protocol
- 2025-11-25
- Reports itself as
- realworldapis 3.4.1
- Capabilities
- tools
- Instructions
- 521 characters
- Claude count
- Claude Opus 5.5, measured 2026-10-05. Counted again when the tool definitions change. Method.
- Repository
- https://github.com/rwapis/realworldapis-mcp
- Registry
- active, updated 2026-09-27 · registry entry
- Reachable
- 7 of the last 7 probes
Most expensive tools
| Tool | Tokens (o200k) | Share of this server |
|---|---|---|
| find_api_for_task | 689 | 27 % |
| search_capabilities | 615 | 24 % |
| search_apis | 585 | 23 % |
| compare_apis | 308 | 12 % |
| verify_requirement | 211 | 8 % |
History
We add a row when the result changes. A server with no change keeps its last row.
| Probed | Result | Init | Tools | Claude | o200k |
|---|---|---|---|---|---|
| 2026-10-06 10:53 | alive | 147 ms | 6 | 4.6k | 2.6k |
| 2026-10-05 13:36 | alive | 419 ms | 6 | 4.6k | 2.6k |
| 2026-10-05 00:19 | alive | 192 ms | 6 | 2.6k | |
| 2026-10-04 09:58 | alive | 952 ms | 6 | 2.6k | |
| 2026-10-04 07:51 | alive | 275 ms | 6 | 2.6k | |
| 2026-10-03 20:31 | alive | 382 ms | 6 | 2.6k | |
| 2026-10-03 17:49 | alive | 524 ms | 6 | 2.6k |
Badge and feed
[](https://mcpcost.ulehla.dev/s/com.realworldapis/realworldapis)
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.