colgrep-mcp

Semantic and hybrid code search for coding agents, as a stdio MCP server wrapping the colgrep CLI. colgrep indexes a repository into code units (functions, classes, methods, Markdown sections) and ranks them with a ColBERT late-interaction model fused with keyword search; this package puts that in the agent's tool list, where it gets used instead of grep.

The full landing page — plugin installs for Claude Code, Codex and Agent Plugins 1.0 clients, troubleshooting, development — is the repository README.

Requirements

  • colgrep ≥ 1.6 on PATH (cargo install colgrep, or see the next-plaid README); the first run downloads the embedding model.
  • Python ≥ 3.11. With uv nothing else: uvx fetches Python if needed.

Run

One-off, resolved and cached by uvx on first start:

uvx colgrep-mcp

Installed once as a plain executable, with no per-start resolution:

uv tool install colgrep-mcp   # or: pipx install colgrep-mcp
colgrep-mcp

Either command is a stdio MCP server; register it in your client as such:

{
  "mcpServers": {
    "colgrep": {
      "command": "uvx",
      "args": ["colgrep-mcp"],
      "env": { "COLGREP_MCP_ROOT": "/path/to/the/repo/to/search" }
    }
  }
}

COLGREP_MCP_ROOT is the project searched when a tool call names no path; without it the server falls back to the client's first root, then to its working directory. COLGREP_MCP_BINARY names the colgrep binary when it is not on PATH. The other variables (COLGREP_MCP_TIMEOUT, COLGREP_MCP_TEXT_BUDGET, COLGREP_MCP_LOG_LEVEL) are documented in the repository README.

What the agent gets

Tools

Tool Purpose
search Ranked semantic or hybrid search over code units, with self-describing hit_ids.
find_files Which files are about a topic, ranked and de-duplicated.
expand Full source of hits already returned, by hit_id.
index_status Whether a path is indexed, with which model, where, how big.
index_build Build or refresh an index now, with progress notifications.
index_clear Delete a project's index, after confirmation.
list_indexes Every indexed project on this machine.
doctor Environment self-check: binary, version, settings, default root.

Resources (colgrep://guide, colgrep://settings, colgrep://indexes, colgrep://status/{+path}, colgrep://errors) and prompts (explore, locate, impact) come with it; the guide resource teaches the agent how to compose queries.

License

GNU Affero General Public License v3.0 or later.

Project links

Data verified by PyPI on Sep 13, 2026
Data provided by the project maintainers, verified at the time the release was uploaded to PyPI.

Key dates

PyPI data
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  • Released:
Newer release available (0.5.0)

Owner

PyPI data
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Credits

Author: Eliott Jacopin

GitHub Statistics

Data verified by PyPI on Sep 13, 2026
The GitHub source repository was provided by the project maintainers and verified by PyPI at the time of upload. Stars, forks, and open issues/PRs are derived from that repository and have not been independently verified.

License expression

AGPL-3.0-or-later
View SPDX License List

Requires

Python >=3.11

Tags

agents code-search colgrep mcp semantic-search

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