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ChatAtlas Local MCP server

by hnt504·io.github.hnt504/chatatlas-local·v0.1.2
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Search and read your saved ChatGPT and Claude chats, kept on your own computer.

A92/100grade A
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Safety scan
A92/100

full report

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If you have run it, two minutes of your experience saves the next person an afternoon.

ChatAtlas Local tools (5)

write = sends, deletes, buys or posts

Read from the package source without running it. The installed server may list more.

  • archive_overview

    What the archive holds: how many chats from each platform, the dates they cover, the tags in use and when it was last imported.

  • list_chats

    Browse the user's saved conversations, newest first, by platform, date, words in the title or tag. Each line has the chat's id for read_chat.

  • read_chat

    Read one saved conversation, message by message, numbered from 1. Long chats come a page at a time: carry on with from_message. A very long single message comes in parts: carry on with part.

  • recent_topics

    What the user talked about with their AIs over a stretch of days: how many chats on each platform, the tags that come up most, and the chats' titles week by week.

  • search_chats

    Find the user's saved conversations that mention something: chats holding every word of the query in the title or messages (each word also matches longer words it starts, accents ignored), title matches first, then newest, with the best-matching message quoted. Each result has the chat's id for read_chat.

Public scan report

scanner v0.1.10 · 2026-10-24 · same rubric, same numbers if you re-run it

no findings
  • Code scan13 source files scanned25/25
  • –Live reliabilityno gateway calls yet and no remote to proben/a
  • –Tool poisoningtools not inspected (local package is not executed); not countedn/a
  • Auth qualitylocal package, no credentials required12/15
  • Maintenancelast push 0 days ago15/15
  • Maintainer identityregistry namespace matches repository owner; GitHub account older than a year8/10
Overall 92/100. Components that don't apply are left out of the denominator. Any critical finding is an F.RubricAppeal a findingJSON

How ChatAtlas Local compares

Against every graded Web search MCP server, from our own scans and uptime checks. Updated after each scan run.

Safety score
92/100
higher than 90% of 3,470 Web search servers
Tools
5
the typical Web search server has 5
Tools that change things
0%
typical: 0%. Fewer write tools means less an agent can break

What its tools let an agent do: 4 read · 1 delete

Install ChatAtlas Local in Claude Code, Cursor or VS Code

Runs npx -y chatatlas-local on your machine. Read the scan report first; the gateway never runs local packages.

claude mcp add chatatlas-local -- npx -y chatatlas-local
Add to Cursor

What the publisher says

From the ChatAtlas Local repository's README, as published. We do not edit it. Read it on GitHub

ChatAtlas Local

Your ChatGPT and Claude chats, searchable on your own computer. Ask Claude about them. Nothing leaves your machine.

You've had hundreds of conversations with AI assistants. The good answers, the decisions, the half-finished plans are scattered across ChatGPT and Claude, and their own search barely helps.

ChatAtlas Local takes the data exports both of them already give you and keeps every chat in one file on your computer. Then you can:

where I planned the garden beds." Claude Desktop, Claude Code, Cursor, VS Code and others can read your archive through MCP.

  • Search everything at once, from the terminal or in your browser.
  • Ask Claude about it: "what did ChatGPT tell me about my sourdough starter?" or "find the chat
  • Keep it forever, as plain Markdown files or a backup, whatever happens to the apps.

No account, no server, no telemetry. It never connects to the internet.

Get started

You need Node.js 22.16 or newer (or 24). Then:

npm install -g chatatlas-local

Before the first npm release, install it straight from GitHub: npm install -g github:hnt504/chatatlas-local

1. Ask for your exports

  • ChatGPT: Settings → Data controls → Export data. You get an email with a link to a .zip.
  • Claude: Settings → Privacy → Export data. Same idea: an email, then a .zip.

2. Bring them in

chatatlas-local import ~/Downloads/<your ChatGPT export>.zip ~/Downloads/<your Claude export>.zip
✓ 6720ab…-2026-10-21.zip: ChatGPT, 1,284 chats (1,284 new)
✓ data-2026-10-21.zip: Claude, 412 chats (412 new)

Do it again whenever you like with a newer export: new chats come in, changed ones update, nothing doubles up. Or let it happen by itself (see Exports folder).

3. Look around

chatatlas-local search sourdough starter
chatatlas-local open            # the browser view in the screenshot above

Connect Claude (and friends)

Claude Desktop

Either download chatatlas-local-.mcpb from the latest release and open it with Claude Desktop (it asks where your exports go; no terminal needed), or, with the command installed:

chatatlas-local setup claude-desktop --write

Quit Claude Desktop completely and open it again. Then ask it something like "Search my old chats for the kitchen remodel estimate."

About the red warning. When you open the extension, Claude Desktop says installing it "will grant this extension access to everything on your computer." It says that for every extension installed from a file rather than from Anthropic's directory, because an extension is a program that runs as you. Here's what this one actually does: it reads your exports and its own archive file, never connects to the internet, and gives Claude read-only tools. The code is all here to check.

Claude Code

Install it as a plugin (the MCP tools and a skill that teaches Claude when to look here):

/plugin install chatatlas-local --marketplace hnt504/chatatlas-local

Or, with the command installed:

chatatlas-local setup claude-code --write   # the MCP tools, for every project
chatatlas-local skill                       # teaches Claude Code when to look here

Shortened. The full README is on GitHub.

Nothing above is checked by us. What we check is on the safety report.

ChatAtlas Local: common questions

Is ChatAtlas Local MCP server safe?
Yes, by our scan: it is graded A (92/100). Read the ChatAtlas Local safety report
How do I install ChatAtlas Local?
It runs on your machine. Copy the Claude Code, Cursor, VS Code or Claude Desktop config from the install section.
Does ChatAtlas Local need an API key?
No secret keys are declared. It reads 2 settings from the environment.
Is ChatAtlas Local maintained?
The last commit was 12 days ago (2026-10-23). The latest release is v0.1.2.
What can I use instead of ChatAtlas Local?
Servers from other publishers that do the same job: screenpipe MCP server and Papersgpt For Zotero MCP server.
How does ChatAtlas Local compare with other Web search MCP servers?
safety score 92/100 (higher than 90% of 3,470 Web search servers); tools 5 (the typical Web search server has 5); tools that change things 0% (typical: 0%. Fewer write tools means less an agent can break). Full comparison.

Alternatives to ChatAtlas Local

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