Bazel Mcp

Created By

saeid-rez3 hours ago

A local MCP server that exposes Bazel build system capabilities to AI assistants. ## Tools | Tool | Description | |------|-------------| | `bazel_query` | Run arbitrary `bazel query` expressions | | `list_targets` | List targets in a package or subtree | | `get_deps` | Direct or transitive dependencies of a target | | `get_rdeps` | Reverse dependencies within a scope | | `show_target_info` | Rule definition via `query --output=build` | | `bazel_build` | Run `bazel build` | | `bazel_test` | Run `bazel test` with structured results | | `explain_build_file` | Read BUILD file contents for analysis |

# bazel

# local

Overview Content Tools Comments

Overview

Bazel MCP

A Model Context Protocol server that exposes Bazel build system capabilities to AI assistants.

Repo: github.com/saeid-rez/bazel-mcp

Tools

Tool	Description
`bazel_query`	Run arbitrary `bazel query` expressions
`list_targets`	List targets in a package or subtree
`get_deps`	Direct or transitive dependencies of a target
`get_rdeps`	Reverse dependencies within a scope
`show_target_info`	Rule definition via `query --output=build`
`bazel_build`	Run `bazel build`
`bazel_test`	Run `bazel test` with structured results
`explain_build_file`	Read BUILD file contents for analysis

Usage

Run against a Bazel workspace. Open that repo in Cursor, then add to .cursor/mcp.json:

{
  "mcpServers": {
    "bazel": {
      "command": "uvx",
      "args": ["--from", "git+https://github.com/saeid-rez/bazel-mcp", "bazel-mcp"]
    }
  }
}

Requires uv. Bazel commands run in your open workspace by default.

If your MCP client does not start the server from the Bazel workspace, pass the workspace explicitly:

{
  "mcpServers": {
    "bazel": {
      "command": "uvx",
      "args": [
        "--from",
        "git+https://github.com/saeid-rez/bazel-mcp",
        "bazel-mcp",
        "--workspace-root",
        "/path/to/your/bazel/workspace"
      ]
    }
  }
}

Other optional flags:

bazel-mcp --bazel-path bazelisk --timeout 600 --max-output-chars 64000

Development

Clone the repo and run tests locally:

git clone https://github.com/saeid-rez/bazel-mcp
cd bazel-mcp
uv sync --group dev
uv run pytest

Server Config

{
  "mcpServers": {
    "bazel": {
      "command": "uvx",
      "args": [
        "--from",
        "git+https://github.com/saeid-rez/bazel-mcp",
        "bazel-mcp"
      ]
    }
  }
}

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