Hippocamp

GitHub Actions

Local Git-backed memory for AI agents.

Add to Cursor Add to VS Code Run on PlugMCP

1{2  "mcpServers": {3    "hippocamp": {4      "command": "npx",5      "args": [6        "-y",7        "[email protected]"8      ]9    }10  }11}

.cursor/mcp.jsonMCP server

Transport: stdio
Status: Local

Power your agent

Add this server

The publisher's own command. Not a PlugMCP endpoint.

Add to Cursor Add to VS Code Run on PlugMCP

Host a copy with our keys and logs.

Local command

npx -y [email protected]

Claude Code has no install link for a local command. Copy the command below and run it in a terminal.

shClaude Code

1claude mcp add hippocamp -- npx -y hippocamp@0.2.12

Run in a terminal.

jsonClaude Desktop

1{2  "mcpServers": {3    "hippocamp": {4      "command": "npx",5      "args": [6        "-y",7        "[email protected]"8      ]9    }10  }11}

claude_desktop_config.json

Local · npmPublisher installStep-by-step: add this in Claude

Remote URL or a command on your machine? How the two installs differ

Run on PlugMCP

Host a copy with our keys and logs.

A new server you create. It is not this listing's official endpoint. Use the publisher install when you want their URL and their credentials.

Launch

Server facts

Local

Transport: stdio
Version: 0.2.12
Last checked: 2026-10-28

Stars: —
Tools: —
Uptime: —

Tools

No tool list yet. Remote servers get one after the first health check.

FAQ

Questions

How do I install Hippocamp?

Copy the stdio config for Cursor, Claude Desktop, Claude Code, or VS Code on this page. It uses the publisher's install, not a PlugMCP proxy.

Does Hippocamp need an API key?

No required environment variable is listed on this record.

What transport does Hippocamp use?

Hippocamp runs locally over stdio.

When was Hippocamp last checked?

Last checked 2026-10-28. Local Git-backed memory for AI agents.

From the publisher

Documentation

Hippocamp

Agent memory, made simple.

Plain Markdown in your own Git repo, shared by all your coding agents, like Claude Code and Codex. One command to install. No API key, no database, no server to run.

Every session starts by waking up from it, and every decision an agent records is a commit you can read, diff, and revert. Open source (MIT).

npx hippocamp@latest install

This installs Hippocamp into every supported agent it finds and creates your memory repo, ~/.lagoon. Restart your agent and it starts each task by waking up from memory.

A replay of a real session. Neither prompt mentions Hippocamp.

Why Hippocamp?

Written by the agent itself. The agent doing the work records what is worth keeping, in its own words. Events stay as written. Optional Dream reviews recent events to update and compact the two summary files, promoting supported lessons through a pull request you review.
One memory for every agent. Claude Code, Codex, and your other agents share the same repo. Built-in memory, like Claude Code's or Codex's, stays inside one tool.
History you can audit. Every memory is a Git commit. Roll back a bad memory like bad code.
Files you own. Plain Markdown, readable without any UI, synced across machines with your normal Git credentials.
Nothing to sign up for. No vendor that can change terms or shut down.

Compared with other memory tools

	Hippocamp	Mem0	Zep	Graphiti	Letta Code	Basic Memory	Claude Code / Codex built-in
Agent agnostic (MCP server)	✅	✅	✅	✅	❌	✅	❌
Plain files you own	✅	❌	❌	❌	✅	✅	✅
Auditable history	✅	✅	❌	❌	✅	❌	❌
No extra account, API key, or model	✅	❌	❌	❌	✅	✅	✅
Syncs through your own Git	✅	❌	❌	❌	✅	❌	❌
Always free	✅	❌	❌	❌	✅	✅	✅
Open source	✅	✅	❌	✅	✅	✅	❌

Results

Reproducible with the scripts in this repo.

	Hippocamp	Reference
Right memory in top 5, LongMemEval-S (470 questions)	90.5%	BM25: 91.4%
Text returned per search	5.9k chars	Whole sessions: 65.5k
Answer accuracy, Claude Sonnet 5, top 10 results	77%	Correct sessions given directly: 90%
Unrelated questions that return nothing (our own test set)	10 / 10

Full tables, method, and limits: docs/results.md.

Docs

Setup: install options, the Lagoon repo, a private remote, configuration
How it works: memory layout, MCP tools, memory rules
Dream: optional overnight memory updates and compaction as a reviewed pull request
Results: evals and how to rerun them
Development: commands and releases

License

MIT

Hippocamp

GitHub Actions

Local Git-backed memory for AI agents.

Devops Developer Tools

Add to Cursor Add to VS Code Run on PlugMCP

GitHub npm Website

Add to Cursor Add to VS Code Run on PlugMCP

1{2  "mcpServers": {3    "hippocamp": {4      "command": "npx",5      "args": [6        "-y",7        "[email protected]"8      ]9    }10  }11}

.cursor/mcp.jsonMCP server

Transport: stdio
Status: Local

Power your agent

Add this server

The publisher's own command. Not a PlugMCP endpoint.

Add to Cursor Add to VS Code Run on PlugMCP

Host a copy with our keys and logs.

Local command

npx -y [email protected]

Claude Code has no install link for a local command. Copy the command below and run it in a terminal.

shClaude Code

1claude mcp add hippocamp -- npx -y hippocamp@0.2.12

Run in a terminal.

jsonClaude Desktop

1{2  "mcpServers": {3    "hippocamp": {4      "command": "npx",5      "args": [6        "-y",7        "[email protected]"8      ]9    }10  }11}

claude_desktop_config.json

Local · npmPublisher installStep-by-step: add this in Claude

Remote URL or a command on your machine? How the two installs differ

Run on PlugMCP

Host a copy with our keys and logs.

A new server you create. It is not this listing's official endpoint. Use the publisher install when you want their URL and their credentials.

Launch

Server facts

Local

Transport: stdio
Version: 0.2.12
Last checked: 2026-10-28

Stars: —
Tools: —
Uptime: —

Tools

No tool list yet. Remote servers get one after the first health check.

FAQ

Questions

How do I install Hippocamp?

Copy the stdio config for Cursor, Claude Desktop, Claude Code, or VS Code on this page. It uses the publisher's install, not a PlugMCP proxy.

Does Hippocamp need an API key?

No required environment variable is listed on this record.

What transport does Hippocamp use?

Hippocamp runs locally over stdio.

When was Hippocamp last checked?

Last checked 2026-10-28. Local Git-backed memory for AI agents.

From the publisher

Documentation

Hippocamp

Agent memory, made simple.

Plain Markdown in your own Git repo, shared by all your coding agents, like Claude Code and Codex. One command to install. No API key, no database, no server to run.

Every session starts by waking up from it, and every decision an agent records is a commit you can read, diff, and revert. Open source (MIT).

npx hippocamp@latest install

This installs Hippocamp into every supported agent it finds and creates your memory repo, ~/.lagoon. Restart your agent and it starts each task by waking up from memory.

A replay of a real session. Neither prompt mentions Hippocamp.

Why Hippocamp?

Written by the agent itself. The agent doing the work records what is worth keeping, in its own words. Events stay as written. Optional Dream reviews recent events to update and compact the two summary files, promoting supported lessons through a pull request you review.
One memory for every agent. Claude Code, Codex, and your other agents share the same repo. Built-in memory, like Claude Code's or Codex's, stays inside one tool.
History you can audit. Every memory is a Git commit. Roll back a bad memory like bad code.
Files you own. Plain Markdown, readable without any UI, synced across machines with your normal Git credentials.
Nothing to sign up for. No vendor that can change terms or shut down.

Compared with other memory tools

	Hippocamp	Mem0	Zep	Graphiti	Letta Code	Basic Memory	Claude Code / Codex built-in
Agent agnostic (MCP server)	✅	✅	✅	✅	❌	✅	❌
Plain files you own	✅	❌	❌	❌	✅	✅	✅
Auditable history	✅	✅	❌	❌	✅	❌	❌
No extra account, API key, or model	✅	❌	❌	❌	✅	✅	✅
Syncs through your own Git	✅	❌	❌	❌	✅	❌	❌
Always free	✅	❌	❌	❌	✅	✅	✅
Open source	✅	✅	❌	✅	✅	✅	❌

Results

Reproducible with the scripts in this repo.

	Hippocamp	Reference
Right memory in top 5, LongMemEval-S (470 questions)	90.5%	BM25: 91.4%
Text returned per search	5.9k chars	Whole sessions: 65.5k
Answer accuracy, Claude Sonnet 5, top 10 results	77%	Correct sessions given directly: 90%
Unrelated questions that return nothing (our own test set)	10 / 10

Full tables, method, and limits: docs/results.md.

Docs

Setup: install options, the Lagoon repo, a private remote, configuration
How it works: memory layout, MCP tools, memory rules
Dream: optional overnight memory updates and compaction as a reviewed pull request
Results: evals and how to rerun them
Development: commands and releases

License

MIT