Chembl
Server Details
ChEMBL MCP — drug discovery database (EBI).
- Status
- Healthy
- Last Tested
- Transport
- Streamable HTTP
- URL
- Repository
- pipeworx-io/mcp-chembl
- GitHub Stars
- 0
- Server Listing
- mcp-chembl
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Tool Definition Quality
Average 4.4/5 across 37 of 37 tools scored. Lowest: 2.7/5.
Multiple tools serve overlapping query purposes: ask_pipeworx, ask_pipeworx_beta, ask_pipeworx_grounded, deep_research, bet_research, and polymarket_* tools create confusion about which to use for a given task. Many tools also perform entity lookup (entity_profile, compare_entities, recent_changes, validate_claim), making it unclear which is best for a simple profile request.
Tool names mix verb_noun patterns (search, resolve_entity, subscribe) with descriptive phrases (ask_pipeworx_grounded, polymarket_kalshi_spread, scan_competitor_ai_presence). Some use underscores, others use full phrases, and there is no consistent convention across the set.
37 tools is excessive for a server ostensibly focused on ChEMBL. Many tools (ai_visibility_check, ask_pipeworx variants, polymarket_*, remember/recall/forget, etc.) are unrelated to chemical data, diluting the server's purpose and making it feel like a general-purpose query system rather than a focused chemistry toolkit.
For the ChEMBL domain, core tools exist (activities, drug_indications, mechanism, molecule, search, target) covering basic retrieval. However, missing operations like update/delete are appropriate for a read-only database. The completeness is adequate for the chemical domain, but the inclusion of many unrelated tools suggests the server attempts to cover too many domains incompletely.
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{
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