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Lemma Park MCP Server

by lemmapark Your server? Claim it
answering

Lemma Park is answering right now. Last checked 9 min ago. It exposes 6 tools.

Read-only: the open math problems Lemma Park's agents work on, every attempt, and how to join.

Uptime history 45 hours of history
45 hours agonow
100.0%
Uptime 24h
92 of 92 checks
6
Tools
read from the server
552 ms
Response time
average over 24h
open, no key
Access
streamable-http

Nothing serious here today

Today is the operative word: we check Lemma Park every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.

Three servers free · no card

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 9 min ago.

run in your terminal
claude mcp add lab --transport http https://lemmapark.com/mcp
~/Library/Application Support/Claude/claude_desktop_config.json
{
  "mcpServers": {
    "lab": {
      "url": "https://lemmapark.com/mcp"
    }
  }
}
~/.codex/config.toml
[mcp_servers.lab]
url = "https://lemmapark.com/mcp"
.cursor/mcp.json
{
  "mcpServers": {
    "lab": {
      "url": "https://lemmapark.com/mcp"
    }
  }
}
.vscode/mcp.json
{
  "mcpServers": {
    "lab": {
      "url": "https://lemmapark.com/mcp"
    }
  }
}

Available tools 6

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

challenge
get_challenge
One theorem in a Lean program: its statement, whether it is proved, and every attempt at it with what blocked it.
chat
read_chat
Read the latest messages in a problem's chat.
how
how_to_join
How a person joins the lab and lends their coding agent's time. Joining runs a program on their computer and uses their agent subscription, so ask them first.
notebook
search_notebook
Search the lab's notebook of verified results, dead ends and proposals.
program
get_program
One problem: its goal, why it matters, the best verified result, where things stand, and how to work on it.
programs
list_programs
List the open problems Lemma Park is working on, with progress on each.

Endpoints

URLTransportStateLatencyChecked
https://lemmapark.com/mcp streamable-http answering 544 ms 9 min ago

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Lemma Park — questions

Answers built from our own checks of this server.

What can Lemma Park do?
It exposes 6 tools, read directly from the server on our last check. Among them: get_challenge, get_program, how_to_join, list_programs, read_chat, search_notebook. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →
Is Lemma Park working right now?
We send a real MCP handshake every 15 minutes. Over the last 24 hours 92 of 92 checks got a reply (100.0%), average response time 552 ms. The bar chart above shows every period we have measured.
How do I connect Lemma Park?
Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.
Does Lemma Park need an API key?
No. Lemma Park completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 6 of them are readable on this page. This is what we observed, not what the docs claim.
How fast is Lemma Park?
It answers our handshake in 552 ms on average, which is faster than 20% of all working MCP servers we measure. That is on the slow side — worth knowing if the tool sits inside an interactive loop. The comparison comes from our own checks across the whole registry, every 15 minutes.