Ownhand

Ownhand

Agents, writing like you.

Ownhand is a remote MCP server that writes text in your own voice, fitted to where it is going: a Slack DM, a cold email, a PR description. It learns your voice from things you wrote, such as about 20 sent emails or Slack messages your agent pulls with your OK, or 5 to 10 you paste, then keeps learning from what you actually send.

• Endpoint: https://ownhand.dev/mcp (streamable HTTP)
• Sign-in: OAuth 2.1 with dynamic client registration. Add the URL, sign in in the browser, pick your Hand, click Allow. No API key to copy.
• New accounts start with $1 of free credit.

Set up with one sentence

Paste this into any agent (Claude Code, Codex, Cursor, Gemini CLI, and others). It adds the server, starts sign-in and sets up your Hand.

Fetch and execute the instructions to set me up for Ownhand from https://ownhand.dev/agent-setup/prompt.md. If your web tool can't open it, download it with curl or Invoke-WebRequest.

Install by client

Raw install deeplinks, if you want to open them yourself:

cursor://anysphere.cursor-deeplink/mcp/install?name=ownhand&config=eyJ1cmwiOiJodHRwczovL293bmhhbmQuZGV2L21jcCJ9
vscode:mcp/install?%7B%22name%22%3A%22ownhand%22%2C%22type%22%3A%22http%22%2C%22url%22%3A%22https%3A%2F%2Fownhand.dev%2Fmcp%22%7D
vscode-insiders:mcp/install?%7B%22name%22%3A%22ownhand%22%2C%22type%22%3A%22http%22%2C%22url%22%3A%22https%3A%2F%2Fownhand.dev%2Fmcp%22%7D
goose://extension?url=https%3A%2F%2Fownhand.dev%2Fmcp&type=streamable_http&id=ownhand&name=Ownhand&description=Write+in+your+own+voice

More configs, including VS Code (.vscode/mcp.json) and Codex (config.toml), are in examples/. The live version of this table is at https://ownhand.dev/connect.

Scripts and CI

For clients without browser sign-in, an API key option is described in the docs: https://ownhand.dev/docs#connect

First run

Once connected, say: "Set up my Ownhand Hand." If the agent has an email or Slack tool, it offers to pull about 20 messages you sent, after asking, and skips anything you didn't write. Or you paste 5 to 10 things you wrote yourself (Slack messages, emails, PR descriptions). It also asks how you'd describe your writing, then calls create_hand. A Hand works with fewer samples but sounds generic until it has about 5 to 20 real ones or has learned from your feedback. Clients that show MCP prompts also list set_up_my_hand.

Ownhand is meant for anything you send under your own name, even when you don't mention it. It isn't for code, notes or summaries, and you can opt out in any conversation. To make the habit stick in clients without memory, paste AGENTS.md into your CLAUDE.md, AGENTS.md, .cursorrules or custom instructions.

Tools

Prompts: set_up_my_hand, teach_my_voice, reply_to_thread, draft_email. Resources: ownhand://guide (the agent playbook), ownhand://occasions (the occasion table).

Agents should pass recipient_name, recipient_email when known, and recipient_notes to write, so drafts fit the person. update_hand can add, edit or remove people.

Agents should check get_hand for custom_occasions and prefer one when it fits. Add, edit or remove them with update_hand.

Occasions: chat_dm, chat_channel, email_internal, email_formal, email_cold, email_warm, proposal_cold, proposal_warm, pr_description, review_comment, docs, status_update.

How learning works

1. Your agent calls write and shows you the draft. Nothing is sent without your OK.
2. You send it as is, edit it, or drop it.
3. Your agent calls send_feedback with exactly the text you sent.
4. Ownhand compares the draft with what you sent and updates your Hand. After you send feedback, a learning pass of a minute or two turns your edits and reasons into proposed rules, which become active once they're confirmed. A reason you state counts as strong evidence, but nothing is instant. The Hand's version number also goes up when you edit it, so don't read it as a sign that learning finished.

You can pin or reject any learned rule with update_hand. Learning from your feedback changes only your own Hand.

Pricing

$1 free to start. Then you add credit and pay for the tokens you use, about half a cent per rewrite. No subscription and no monthly fee. Details: https://ownhand.dev/pricing.

Privacy

• Stored: your account details, your Hands (samples, style card, learned rules), your requests and the feedback you send.
• Logged: which tools your agent calls, whether each call worked, how long it took and which app made it, never what the calls contain. Deleted after 90 days.
• Not stored: thread messages your agent passes as context. They are used for that one request.
• Not sold, not shared for advertising, and not used to train our own models.
• Writing and learning run on Muse Spark through OpenRouter's contributor tier, so the provider may use everything Ownhand processes (drafts, samples, thread context, feedback) to improve its models. Don't use Ownhand for text you want kept out of that.
• You can delete a Hand, revoke a key or disconnect an app at any time.

Read the full policy: https://ownhand.dev/privacy.

Docs

• Docs: https://ownhand.dev/docs
• Agent guide: https://ownhand.dev/docs/agent-guide.md
• Connect: https://ownhand.dev/connect
• For agents: https://ownhand.dev/llms.txt

What's in this repo

• server.json: the entry for the official MCP Registry
• .claude-plugin/, .mcp.json, skills/ownhand/: a Claude Code plugin and marketplace
• gemini-extension.json, GEMINI.md: a Gemini CLI extension
• AGENTS.md: the instruction block for any agent
• examples/: client configs

License

The configs and docs in this repo are MIT licensed (see LICENSE). The Ownhand service itself is proprietary and run by Thalient Labs.

Contact: hi@thalientlabs.ai