Chroma MCP: Documentation

Connection

uvx chroma-mcp (stdio) — for a local, unauthenticated Chroma instance. For Chroma Cloud, set CHROMA_API_KEY plus the tenant address. Requires Python 3.10+ and uv.

Tools

12 tools in two groups: collections — list_collections, create_collection, peek_collection, get_collection, count_collection, modify_collection, delete_collection; documents within a collection — add, query (vector search), get (including full-text and metadata filters), update, delete.

Agent flow

"Create a collection for the knowledge base and add documents", "find documents semantically similar to the customer's question", "how many documents are in the products collection?", "update this document's metadata".

Important

The repository's last commit was in September 2025 — there's been little visible activity since, even though this is an official server from the Chroma team. Check the repo's current status on GitHub before relying on it in production.

Pricing

The MCP server is free, open source. A local Chroma instance is free; Chroma Cloud is freemium, with a free limit and paid plans based on storage volume.