@rafsanbasunia
mcp server for HAR (HTTP Archive) files.
以下の設定を使って、このサーバーを MCP 対応クライアントに追加してください。
{
"mcpServers": {
"hartrace": {
"command": "python",
"args": [
"/absolute/path/to/hartrace/har_mcp.py"
]
}
}
}ツール一覧はまだありません
この掲載には表示できるツール一覧がまだありません。サーバーにツールがないという意味ではありません。対応機能はプロジェクトのドキュメントをご確認ください。
ツールは README から自動的に抽出されます。メンテナーは ## Tools という見出しの下に記載することで、このタブに反映できます。
Hartrace is an MCP server for analyzing HTTP traffic captures (HAR files). Its distinguishing feature is value provenance tracing: given any token, cookie, ID, or payload field, it reconstructs where the value was produced (which response set it) and where it was consumed (which later requests sent it), as a compact timeline. It is built so an AI agent can answer questions about a capture without reading the raw JSON into its context window. All tools return small, structured results with hard size caps, keeping analysis cheap regardless of capture size.
Install with pipx install hartrace, uvx hartrace, or pip install hartrace. Add it to your MCP client’s configuration (e.g., claude_desktop_config.json for Claude Desktop, .cursor/mcp.json for Cursor, or .vscode/mcp.json for VS Code). Then interact naturally: “Load ~/captures/login.har and tell me where the CSRF token comes from.” Hartrace exposes 19 tools for loading, inspection, search, provenance, and comparison. Loaded captures are referred to by the name returned from load_har.
trace_value, trace_header) — follows any value across responses → requests, reporting JSON paths for body fields.cookie_map and token_map summarize how cookies and high-entropy secrets flow through a session.(method, url, ordinal) so repeated calls to the same endpoint align.On first trace, Hartrace builds a correlation index over the capture (cached for subsequent calls). It separates hits into `set_by` (responses that produced the value) and `used_in` (later requests that sent it), with JSON paths where applicable. Values shorter than four characters are refused.
Python 3.10+ and the `fastmcp` package. No other dependencies are required.
List and search tools paginate with `limit`/`offset` (clamped server‑side). Response bodies are capped by `max_chars`. Captures larger than 500 MB or 50,000 entries are rejected. All tools return structured error messages instead of raising exceptions.
Yes, via the `load_har_url` tool. It guards against SSRF by refusing non‑`http(s)` schemes and any host resolving to private, loopback, link‑local, reserved, or multicast addresses, and enforces a download size cap.
Inspection tools redact header values listed in `sensitive_headers` (configurable via `config.json`, e.g., `authorization`, `cookie`, `set-cookie`) when `redact_sensitive_headers` is set to `true`. High‑entropy opaque strings are always redacted using a Shannon‑entropy heuristic. `find_header` intentionally returns raw values so they can be traced with `trace_value`.
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