io.github.cyanheads/ensembl-mcp-server
ensembl-mcp-server
io.github.cyanheads/ensembl-mcp-server costs 4 105 tokens of context per session. It has 7 tool definitions. That is 2.1 % of a 200k window. Measured 2026-10-03.
Look up genes, sequences, variants, homologs, and cross-database xrefs from Ensembl REST.
alive probed 2026-10-03 · HTTP 200
7tools
4.1ktokens for the tool definitions
2.1 %of a 200k context window
865 msto initialize
302 msto list tools
- Endpoint
- https://ensembl.caseyjhand.com/mcp (streamable-http)
- Host
- ensembl.caseyjhand.com
- Protocol
- 2025-11-25
- Reports itself as
- ensembl-mcp-server 0.5.0
- Capabilities
- logging, prompts, resources, tools
- Instructions
- 522 characters
- Repository
- https://github.com/cyanheads/ensembl-mcp-server
- Registry
- active, updated 2026-09-24 · registry entry
- Reachable
- 2 of the last 2 probes
Most expensive tools
| Tool | Tokens | Share of this server |
|---|---|---|
| ensembl_get_sequence | 854 | 21 % |
| ensembl_predict_variant | 775 | 19 % |
| ensembl_query_region | 675 | 16 % |
| ensembl_lookup_gene | 579 | 14 % |
| ensembl_get_homology | 526 | 13 % |
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 | 865 ms | 7 | 4.1k |
| 2026-10-03 17:53 | alive | 584 ms | 7 | 4.1k |
Badge
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