io.github.cyanheads/chembl-mcp-server
chembl-mcp-server
io.github.cyanheads/chembl-mcp-server costs 2 982 tokens of context per session. It has 7 tool definitions. That is 1.5 % of a 200k window. Measured 2026-10-03.
Link compounds to protein targets, rank bioactivity, and look up drug mechanisms and indications.
alive probed 2026-10-03 · HTTP 200
7tools
3.0ktokens for the tool definitions
1.5 %of a 200k context window
998 msto initialize
275 msto list tools
- Endpoint
- https://chembl.caseyjhand.com/mcp (streamable-http)
- Host
- chembl.caseyjhand.com
- Protocol
- 2025-11-25
- Reports itself as
- chembl-mcp-server 0.3.2
- Capabilities
- logging, prompts, resources, tools
- Instructions
- 1 594 characters
- Repository
- https://github.com/cyanheads/chembl-mcp-server
- Registry
- active, updated 2026-09-26 · registry entry
- Reachable
- 2 of the last 2 probes
Most expensive tools
| Tool | Tokens | Share of this server |
|---|---|---|
| chembl_get_bioactivities | 986 | 33 % |
| chembl_search_molecules | 567 | 19 % |
| chembl_search_targets | 453 | 15 % |
| chembl_dataframe_query | 356 | 12 % |
| chembl_get_drug_info | 288 | 10 % |
History
We add a row when the result changes. A server with no change keeps its last row.
| Probed | Result | Init | Tools | Tokens |
|---|---|---|---|---|
| 2026-10-03 20:37 | alive | 998 ms | 7 | 3.0k |
| 2026-10-03 17:53 | alive | 554 ms | 7 | 3.0k |
Badge
[](https://mcp-pulse.ulehla.dev/s/io.github.cyanheads/chembl-mcp-server)