bazel-mcp
A local MCP server that exposes Bazel build system capabilities to AI assistants.
README
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
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