Best for
- Developers using Rust and Cargo
- Scenarios requiring stable structured output for automation or AI integration
- Agent workflows aiming to minimize token usage
P
Pare Cargo
Community
Structured Rust cargo operations, optimized for AI agents
GitHub source repository ↗
34FMRS · D
Pare Cargo is an MCP server from the Pare suite that wraps common Rust cargo commands (build, test, clippy, fmt, doc) into typed JSON output, replacing fragile terminal text parsing. It leverages MCP's structuredContent and outputSchema features to provide reliable, schema-validated data for AI agents. This server is included in the Pare repository under packages/server-cargo, version 0.22.0, and communicates via stdio.
Tools
cargo build
Executes cargo build and returns structured build results including success/failure status and error lists.
cargo test
Runs cargo test and returns structured test results including counts and pass/fail details.
cargo clippy
Runs clippy linting and returns structured lint reports including warnings and errors.
cargo fmt
Runs rustfmt and returns structured formatting status including whether changes were made.
cargo doc
Generates Rust documentation and returns structured documentation build status.
Setup
- Ensure Node.js >= 20 is installed.\n2. Add the following to your MCP client configuration (e.g., Claude Desktop or Cursor):\n\n{\n \"mcpServers\": {\n \"pare-cargo\": {\n \"command\": \"npx\",\n \"args\": [\"-y\", \"@paretools/cargo\"]\n }\n }\n}\n\n3. Restart your MCP client to apply the configuration.\n4. Optional: Run
npx @paretools/init doctorto validate setup.
claude_desktop_config.json
{
"mcpServers": {
"pare-cargo": {
"command": "npx",
"args": [
"-y",
"@paretools/cargo"
],
"env": {}
}
}
}
Fit and risk
Not for
- Projects not using Rust or Cargo
- Scenarios needing raw terminal output directly
- Simple tasks without the need for structure and unfamiliarity with Rust toolchain
Required permissions
- Execute Cargo commands (e.g., build, test, clippy, fmt, doc)
- Access project directories to read configurations and source code
- May create build artifacts (e.g., target directory)
Risks and side effects
- Cargo command execution may alter project state (e.g., generate files or modify lock files)
- Tool outputs may contain sensitive information; handle with care
- Dependency on Node.js environment and network (via npx package fetch)
Troubleshooting
- Ensure Node.js >= 20 to avoid version errors
- If npx not found, use absolute path or install globally
- If slow startup, run `npx -y @paretools/cargo` to pre-cache
- If connection timeout, increase MCP_TIMEOUT environment variable
- If too many tools, use PARE_CARGO_TOOLS environment variable to filter
Use cases
Allow AI agents to execute build, test, and other operations in Rust projects with structured results
Reduce token consumption especially with verbose build logs
Avoid brittle CLI parsing and ensure cross-platform consistency
Supported clients
Claude DesktopFull support
Claude CodeFull support
CursorFull support
VS CodeFull support
WindsurfFull support
ClineFull support
Roo CodeFull support