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The LLMGRAPH MCP server
A local MCP server for Windows that answers who calls a function and what breaks if it changes, for Python and TypeScript. Labels every line.
LLMGRAPH is a local MCP server that answers five questions about your code, including who calls a function and which callers an edit missed. It runs on Windows x64 for Python and TypeScript/JavaScript, and any MCP agent can use it.
The five questions
Your agent asks one of these through MCP. The descriptions are the server's own words, and each question has its own page.
who_callsEvery place that calls this function, plus calls we can't see.what_breaks_if_changedEverything that depends on this, directly or indirectly, and what we can't see.check_my_changesAfter editing: callers you didn't update, and anything we can't see.what_is_unknownWhere our view is blind (dynamic calls, unknown types, unreadable files) and why.explainWhy we said this: the evidence behind one answer line.How the answers read
Every line of an answer carries one of five labels, from certain to cannot_see, and a line that cannot be proven says so instead of guessing. What each label means is in the glossary; how to read a whole answer is on reading an answer. Real answers from open-source repos, including where it loses to a plain text search, are on real answers.
Add it to an agent
Any agent that can use MCP servers can run it. The server is started by your agent with one command:
npx -y llmgraph-mcpThe first time your agent asks a question, LLMGRAPH answers with a sign-in link; after that you ask as usual. The place to put the command is different in each agent, and Set up with your agent has a tab for each of the seven. Claude Code users can install the plugin instead: it adds the server and a stop check.
Where it runs
On your computer. Your code is read and analysed on your machine, and the beta runs on Windows x64 only. It reads Python and TypeScript/JavaScript; other languages are not read, and what it can't see lists the rest.
More
- Questions and answers: agents, languages, privacy, the trial.
- Grep, language server or LLMGRAPH: when to use text search, a language server or LLMGRAPH.
- How LLMGRAPH is put together: the packages and the programs that run.