io.github.lonniev/personalbrain-mcp

thebrain-mcp

FastMCP server for TheBrain API — AI access to a personal knowledge graph, Tollbooth-monetized

alive probed 2026-10-15 · HTTP 200

84tools

35ktokens in Claude Opus 5.5

36ktokens in Claude Code

17.5 %of a 200k context window

21ko200k_base estimate

6.4 sto initialize

211 msto list tools

Endpoint: https://personal-brain.fastmcp.app/mcp (streamable-http)
Host: personal-brain.fastmcp.app
Protocol: 2025-11-25
Reports itself as: thebrain-mcp 1.17.8
Capabilities: experimental, extensions, logging, prompts, resources, tools
Instructions: 5 618 characters
Claude count: Claude Opus 5.5, measured 2026-10-15. Counted again when the tool definitions change. Method.
Repository: https://github.com/lonniev/thebrain-mcp
Registry: active, updated 2026-08-24 · registry entry
Reachable: 9 of the last 9 probes

Most expensive tools

Tool	Tokens (o200k)	Share of this server
brain_get_modifications	671	3 %
brain_update_thought	581	3 %
brain_update_coupon	559	3 %
brain_request_npub_proof	557	3 %
brain_create_thought	553	3 %

History

We add a row when the result changes. A server with no change keeps its last row.

Probed	Result	Init	Tools	Claude	o200k
2026-10-15 10:48	alive	3.4 s	84	35k	21k
2026-10-13 11:17	alive	935 ms	84	30k	17k
2026-10-08 11:15	alive	2.6 s	83	29k	17k
2026-10-05 14:56	alive	6.4 s	83	29k	17k
2026-10-05 00:37	alive	3.2 s	83		17k
2026-10-04 10:05	alive	1.2 s	83		17k
2026-10-04 07:59	alive	1.0 s	83		17k
2026-10-03 20:38	alive	2.3 s	83		17k
2026-10-03 17:54	alive	1.3 s	83		17k

Badge and feed

[![mcpcost](https://mcpcost.ulehla.dev/badge/io.github.lonniev/personalbrain-mcp.svg)](https://mcpcost.ulehla.dev/s/io.github.lonniev/personalbrain-mcp)

An entry for every probe that changed the result, the tool count or the token cost: Atom feed. Add it to a feed reader or a Slack RSS app to hear when the server stops answering or its tool set grows.