CypherWolf MCP server — Neo4j Cypher query revision from a curated corpus, for @neo4j.com users.
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# cypherwolf-mcp **CypherWolf** revises Neo4j Cypher queries against a curated corpus of Neo4j engineering precedent, returning compatibility-gated **precedent** options plus the index/constraint validation gates to confirm before applying changes. It ships as a single-tool MCP server (`revise_query`) that runs locally over stdio and proxies to the CypherWolf HTTPS service. **Access is restricted to `@neo4j.com` users.** The package holds **no** API key, **no** shared secret, and **no** Aura credentials — all access control is enforced server-side via an email gate plus a 30-day session token. Get set up in about two minutes: **install → sign in → add to your MCP client → `cypherwolf-mcp status` to confirm → ask for a rewrite.** --- ## 1. Install CypherWolf is a standalone CLI, so install it with [pipx](https://pipx.pypa.io) — it isolates the dependencies and puts the `cypherwolf-mcp` command on your `PATH`: ```bash pipx install cypherwolf-mcp ``` Requires Python 3.10+. Dependencies are just `mcp` and `httpx` — no database driver, no cloud SDKs. Don't have pipx? Install it (`brew install pipx` on macOS, or `python3 -m pip install --user pipx`) and run `pipx ensurepath`. On Homebrew/externally-managed Python, `pip install cypherwolf-mcp` fails with a PEP 668 error — pipx is the supported path. (A manual `pip install` inside an activated virtualenv also works if you prefer.) Upgrade later with `pipx upgrade cypherwolf-mcp`. ## 2. Sign in Sign in once in a normal terminal with your Neo4j email: ```bash cypherwolf-mcp auth ``` You will see the following disclosure, then be prompted for your email and a 6-digit code sent to it: > This will email a 6-digit code to verify your @neo4j.com address. Your > queries and the rewrites are saved to a Neo4j-internal folder under your > email for internal use only. The resulting session token is cached at `~/.cypherwolf/credentials.json` (mode `0600`) and is valid for 30 days. After it expires — or if the token is r…
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