io.github.hnt504/chatatlas-local

ChatAtlas Local

Is the ChatAtlas Local MCP server down? No. It answered initialize and tools/list in the probe of 2026-11-10.

Search and read your saved ChatGPT and Claude chats, kept on your own computer.

alive probed 2026-11-15 · unchanged since 2026-11-10

5tools

1.3ktokens in Claude Opus 5.5

0.6 %of Claude's 200k window

0.5×the median server

152 msto initialize

5 msto list tools

Run it: npx -y chatatlas-local@0.1.3 (stdio, probed in a container with the network off)
Host: npmjs.com
Reports itself as: chatatlas-local 0.1.3
Capabilities: tools
Instructions: 946 characters
Of a 1M window: 0.1 % of a 1M context window
Count: 1.3k tokens in Claude Opus 5.5, exact, measured 2026-11-04. With the Claude Code prefix mcp__…__ on each tool name: 1.3k. The o200k_base estimate is 815. Counted again when the tool definitions change. Method.
Repository: https://github.com/hnt504/chatatlas-local
Website: https://github.com/hnt504/chatatlas-local#readme
Registry: active, updated 2026-11-09 · registry entry

Most expensive tools

The Claude column scales the o200k estimate of each tool by this server's ratio of exact to estimate, 1.56×.

Tool	≈ Claude tokens	o200k estimate	Share of this server
search_chats	389	249	31 %
list_chats	370	237	29 %
read_chat	241	154	19 %
recent_topics	191	122	15 %
archive_overview	83	53	7 %

Other registry entries on npmjs.com, the ones next to this name; all of them.

Servers that mention computer or chatgpt.

The result of the latest probe, the tool count and the token cost. The feed has an entry for every probe that changed them.

Stops answering, comes back, tool set or cost changes. One confirmation mail first, a stop link in every mail.