Mychem vs Ncbi Eutils
A side-by-side look at the Mychem and Ncbi Eutils MCP servers: transport, auth, tools, quality signals, and the config to install either one in Claude, Cursor, Windsurf or VS Code.
Verdict: choose Mychem for biology & bioinformatics work as a local process; choose Ncbi Eutils for biology & bioinformatics as a local process. You can also run both side by side in one mcpServers block.
Which MCP server should you choose?
Choose Mychem when
- You need dedicated capabilities in the Biology & Bioinformatics domain.
- You prefer a local stdio subprocess transport.
- You want tools like
query, chem, metadata.
Choose Ncbi Eutils when
- You need dedicated capabilities in the Biology & Bioinformatics domain.
- You prefer a local stdio subprocess transport.
Feature & specification comparison
Rows where the two servers differ are marked.
| Spec | ||
|---|---|---|
| Category | Biology & Bioinformatics | Biology & Bioinformatics |
| Quality signal | 45/100 · Fair | 43/100 · Fair |
| Install command | Confirmed | Confirmed |
| Transport | Local subprocess (stdio) | Local subprocess (stdio) |
| Auth | Not declared | Not declared |
| Pricing | Not declared | Not declared |
| Required env vars | None listed | None listed |
| Verified owner | Community listing | Community listing |
| GitHub stars | 0 | 0 |
| Directory activity | 3 views 0 installs 0 upvotes | 2 views 0 installs 0 upvotes |
| Tools | 3 | Not listed |
| Full listing | View Mychem | View Ncbi Eutils |
Tools & capabilities
Mychem tools 3
querySearch MyChem.info for drugs / chemical compounds. Accepts a plain drug name ("aspirin"), an InChIKey, or a fielded query (e.g. "chembl.pref_name:aspirin", "drugbank.name:Acetylsalicylic acid"). Returns aggregated hits with cross-references to ChEMBL, DrugBank, PubChem, ChEBI, DrugCentral, etc. Use…chemFetch the full aggregated annotation for a single chemical / drug by id. The id is typically an InChIKey (e.g. "BSYNRYMUTXBXSQ-UHFFFAOYSA-N"), but a DrugBank id, ChEMBL id, or other source id also works. Returns merged annotations from ChEMBL, DrugBank, PubChem, ChEBI, DrugCentral, etc., including…metadataReturns MyChem.info build metadata: total indexed compound count, available annotation sources (ChEMBL, DrugBank, PubChem, ChEBI, DrugCentral, FDA NDC), and their current release versions.
Ncbi Eutils tools
No tool names declared yet. Check the project README from the listing page.
Ready-to-paste client configs
Paste either block (or both) into your client config, e.g. claude_desktop_config.json or ~/.cursor/mcp.json. We only show a config when the install command is confirmed.
Mychem
{
"mcpServers": {
"mychem": {
"command": "npx",
"args": [
"-y",
"@pipeworx/mcp-mychem"
]
}
}
}
Ncbi Eutils
{
"mcpServers": {
"ncbi-eutils": {
"command": "npx",
"args": [
"-y",
"@pipeworx/mcp-ncbi-eutils"
]
}
}
}
Frequently asked questions
Mychem is categorized under Biology & Bioinformatics and uses a local stdio subprocess. Ncbi Eutils belongs to Biology & Bioinformatics and uses a local stdio subprocess. Pick Mychem for biology & bioinformatics work and Ncbi Eutils for biology & bioinformatics.
Copy the mcpServers block from the config section on this page into your client's config (for example claude_desktop_config.json or ~/.cursor/mcp.json), then fully restart the client.
Mychem has no declared pricing — check the project's own site. Ncbi Eutils has no declared pricing — check the project's own site. If a server needs environment variables such as API keys, define them under the env key in your client's MCP config.
Yes. MCP clients support multiple servers: add mychem and ncbi-eutils as separate keys in the same mcpServers object, and your assistant will call tools from either one.
On AllMCPs, Mychem has a quality signal of 45/100 (Fair) with 3 views, 0 installs and 0 GitHub stars. Ncbi Eutils has 43/100 (Fair) with 2 views, 0 installs and 0 GitHub stars.