# CPU Performance Engineering (MCP server)

> CPU Performance Engineering is an MCP server that gives any AI client the whole CPU Performance Engineering list as something it can search and reason over, instead of a page it has to be pasted. Connect it to Claude Code, Codex… It has 1,054 GitHub stars, is released under the MIT license and runs locally with uvx cpu-perf.

An MCP server that gives any AI client the whole CPU Performance Engineering list as something it can search and reason over, instead of a page it has to be pasted. Connect it to Claude Code, Codex, Claude Desktop, Cursor or VS Code and use it for your own performance work: ask questions, paste perf stat or compiler output, and the client's own model writes the answer from what the server returns, with citations back to the sources.

## Key facts

| Fact | Value |
|---|---|
| Repository | https://github.com/usamahz/cpu-performance-engineering |
| GitHub stars | 1,054 |
| License | MIT |
| Language | Python |
| Transport | stdio |
| Packages | pypi: cpu-perf |
| Remote URL | none |
| Needs API key | no |
| Official | no |
| Works with | Claude Desktop, Claude Code, Cursor, VS Code |
| Category | Developer tools |
| Latest release | v1.0.0 (Sep 27, 2026) |
| Last commit | Oct 5, 2026 |
| MCP registry name | io.github.usamahz/cpu-perf |

## Install

### Claude Desktop (claude_desktop_config.json)

```json
{
  "mcpServers": {
    "cpu-performance-engineering": {
      "command": "uvx",
      "args": [
        "cpu-perf"
      ]
    }
  }
}
```

Settings > Developer > Edit Config. macOS: ~/Library/Application Support/Claude/, Windows: %APPDATA%\Claude\. Restart Claude Desktop afterwards.

### Claude Code

```sh
claude mcp add --transport stdio cpu-performance-engineering -- uvx cpu-perf
```

### Cursor (.cursor/mcp.json)

```json
{
  "mcpServers": {
    "cpu-performance-engineering": {
      "type": "stdio",
      "command": "uvx",
      "args": [
        "cpu-perf"
      ]
    }
  }
}
```

Project file; use ~/.cursor/mcp.json to enable it in every project.

### VS Code (.vscode/mcp.json)

```json
{
  "servers": {
    "cpu-performance-engineering": {
      "type": "stdio",
      "command": "uvx",
      "args": [
        "cpu-perf"
      ]
    }
  }
}
```

Config formats checked against the official docs on 2026-10-07.

## Tools

- `lookup`: Ranked lookup over entries, sections, benchmarks, the record, notes and benchmark code, or over the sources' text…
- `get_section`: The table of contents, or one section in dependency order with its benchmarks and, for the watchlist, the promotion…
- `get_entry`: One entry in context: why it is listed, what to read before and after, other places it is listed, its benchmark, the…
- `reading_path`: What to read, in order, for a topic, ending with the benchmark that reproduces it.
- `get_benchmark`: A benchmark's claim, machine (the seven fields), results, analysis, limits, code, build and run scripts, raw output…
- `editorial_record`: Why something is or is not listed: rejections by rule, claims by verdict, link notes.
- `check_evidence`: A seven-field audit of a performance claim, with how the list judged similar numbers.
- `read_source`: The text of one linked source, from the library or fetched now; with query, only the matching passages; with passage,…
- `read_file`: Any repository file the server carries.
- `library_status`: Which copy of the list is served, the daily update's state, how much of the linked material is indexed, and what is…

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