ai.opencancer/opencancer
OpenCancer
Cancer patient expert: NCCN-grounded answers with sources, recruiting trials, and expert review.
alive probed 2026-10-15 · HTTP 200
5tools
2.0ktokens in Claude Opus 5.5
2.0ktokens in Claude Code
1.0 %of a 200k context window
1.1ko200k_base estimate
664 msto initialize
504 msto list tools
- Endpoint
- https://opencancer.ai/api/mcp (streamable-http)
- Host
- opencancer.ai
- Protocol
- 2025-11-25
- Reports itself as
- opencancer 2.0.0
- Capabilities
- tools
- Instructions
- 371 characters
- Claude count
- Claude Opus 5.5, measured 2026-10-15. Counted again when the tool definitions change. Method.
- Website
- https://opencancer.ai/connectors
- Registry
- active, updated 2026-10-14 · registry entry
- Reachable
- 1 of the last 1 probe
Most expensive tools
| Tool | Tokens (o200k) | Share of this server |
|---|---|---|
| send_feedback | 274 | 24 % |
| find_clinical_trials | 273 | 24 % |
| ask_opencancer | 268 | 24 % |
| open_case | 189 | 17 % |
| get_trial_details | 132 | 12 % |
Badge and feed
[](https://mcpcost.ulehla.dev/s/ai.opencancer/opencancer)
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.