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Honcho MCP Server: Setup for Claude, Cursor and Other Apps

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Gethttps://mcp.honcho.devplastic-labs/honcho

Gives Claude, Cursor and other assistants long-term memory that learns about you and your past conversations.

Honcho is a memory service, and this is its own hosted MCP server from Plastic Labs. Your assistant saves conversations into it, and Honcho builds facts and a profile about each person that the assistant can ask for later. You need an API key from app.honcho.dev.

Everything you save goes to Honcho's servers. You can also run the server yourself over stdio or Docker against a self-hosted Honcho.

Good for

  • Anyone who wants an assistant to remember preferences and past work between chats
  • Developers who build agents that need memory about each user
  • Cursor and Claude Code users who want their coding agent to keep context across sessions

Works in

14 should work

Tap an app to see how to set it up and any known problems.

Install Honcho MCP

Claude Code

  1. 1

    Copy this prompt.

    Add the Honcho MCP server to Claude Code. Run this command:
    
    claude mcp add honcho --transport http "https://mcp.honcho.dev" --header "Authorization: Bearer <your-honcho-key>" --header "X-Honcho-Plugin: claude-code"
    
    Then check that it loaded and tell me if I need to sign in or restart.
  2. 2

    Paste it into Claude Code. It shows the change and asks before running it.

Requires Honcho API key.

Read-only mode: There is no read-only mode. The tools include ones that add messages and delete sessions and conclusions.

Get an API key at app.honcho.dev first and replace the placeholder; the hosted server needs it as a Bearer header. Fully restart your app after saving. The header X-Honcho-Plugin is optional and only names your client. Honcho's docs also suggest pasting its instructions file into your project so the assistant knows how to use the memory tools. Claude Desktop and Codex use the mcp-remote bridge, so they need Node.js.

From the vendor's docs. Source.

Tools

  • Asks a question about one person and gets a reasoned answer

    Asks Honcho's reasoning system a question about a single peer, such as a user, and returns an answer built from what it has learned. You can limit it to a session or scope.

    Try: “What does this user prefer when we talk about code reviews?”

    Network · chat

  • Asks a question across everything in a workspace

    Asks a natural-language question about the whole workspace and returns an answer from Honcho's reasoning system.

    Try: “What topics came up most across all my conversations?”

    Network · workspace_chat

  • Searches messages and saved facts by meaning

    Runs a semantic search across messages, and also across a peer's saved conclusions when you name a peer.

    Try: “Find where we discussed the pricing change.”

    Network · search

  • Gets everything Honcho knows about a peer in one go

    Combines a peer's conclusions and peer card into one context block.

    Try: “Load my full context before we start.”

    Network · get_peer_context

  • Shows the short fact sheet about a peer

    Returns the peer card, a compact list of biographical facts.

    Try: “Show my peer card.”

    Network · get_peer_card

  • Sets or updates the fact sheet about a peer

    Writes the peer card, a list of facts about the peer.

    Try: “Update my peer card: I work in Berlin and prefer TypeScript.”

    Write · set_peer_card

  • Shows a text summary of what Honcho knows about a peer

    Returns a formatted summary built from the peer's conclusions, optionally limited to a session or scope.

    Try: “Give me the current summary of what you know about this user.”

    Network · get_representation

  • Creates a peer, or returns it if it exists

    Gets or creates a peer, which is a person or agent that Honcho remembers things about.

    Try: “Create a peer called alice.”

    Write · create_peer

  • Lists the peers in a workspace

    Lists peers in the workspace, with paging.

    Try: “Who does Honcho know about in this workspace?”

    Network · list_peers

  • Lists the workspaces your key can reach

    Lists workspaces that the current credentials can access, with paging.

    Try: “Which Honcho workspaces do I have?”

    Network · list_workspaces

  • Creates a workspace, or returns it if it exists

    Gets or creates a workspace with the ID you give.

    Try: “Create a workspace called support-bot.”

    Write · create_workspace

  • Shows a workspace at a glance

    Aggregates metadata, configuration and the peer and session IDs of a workspace.

    Try: “Give me an overview of the support-bot workspace.”

    Network · inspect_workspace

Read from the source code

Permissions

high risk · 4 things to watch

High risk

The assistant stores your conversations and the facts learned from them on Honcho's servers, and it can delete sessions and learned facts. Use a key for a workspace you can afford to lose, and do not save secrets into it.

What it can do

  • Read your data
  • Create and change things
  • Delete things
  • Read-only mode

Watch out for

  • It can delete sessions and facts

    Deleting a session removes all its messages, and a delete tool removes learned facts. Use a separate workspace for experiments. github.com

  • Conversations are stored by a third party

    Messages you add go to Honcho, which derives facts and profiles from them. Do not save passwords or private data. github.com

  • One key reaches the whole workspace

    The API key is sent as a Bearer header and covers every tool. Keep it out of shared config files. github.com

  • Requests can take a long time

    The README says chat calls can run up to 5 minutes by default, which can stall a client. github.com

Security advisories

No published security advisories as of Nov 1, 2026.

Technical details
Turning on read-onlyNo read-only mode is documented. Write and delete tools are always registered.
Talks tomcp.honcho.dev and api.honcho.dev (Honcho cloud). Your own Honcho server if you set HONCHO_API_URL
Sign-in and keysA Honcho API key from app.honcho.dev, sent as a Bearer header.
Scopes
  • Honcho API key for a workspace

Questions

Is the Honcho MCP server official?

Yes. Plastic Labs, the maker of Honcho, publishes it in the honcho repository and hosts it at mcp.honcho.dev.

What is the Honcho MCP server URL?

The hosted URL is https://mcp.honcho.dev. You also need an API key from app.honcho.dev.

Do I need an API key?

Yes. Create a key at app.honcho.dev and send it as a Bearer header on every request. The vendor docs show this for every client they list.

Can I self-host it?

Yes. Point the server at your own Honcho with the API URL setting, and run it over stdio, HTTP or Docker as the README describes.

Why do Claude Desktop and Codex use mcp-remote?

They run local programs only, so the docs use the mcp-remote bridge to reach the hosted URL. That needs Node.js.

Can it delete my data?

Yes. It can delete sessions with all their messages and delete learned facts. There is no read-only mode.

Is it free?

The server code is open source under AGPL-3.0. The README does not state hosted pricing.

Information

updated Nov 2, 2026

Publisher
Official
Endpoint
https://mcp.honcho.dev
Transport
Streamable HTTP
Auth
API key
Version
3.0.0
License
AGPL-3.0
Last commit
Oct 31, 2026
Open issues
100
Listed in
Official MCP registry

WebsiteGitHubOfficial MCP RegistryChangelogIssues

Sources

Docs, issue trackers and discussions this page is built from. Issues, quotes and findings above link to their own source.

Show all 3
  1. Honcho MCP guide · github.com
  2. Honcho MCP README · github.com
  3. Session tools source · github.com

Facts from the official MCP registry, GitHub, npm, PyPI and the Docker catalog. Updated Nov 2, 2026.