md2sign for Claude Code

Ask Claude to draft a contract and get it signed. This plugin connects Claude Code to md2sign: markdown in, legally binding e-signatures out, usually about three minutes from asking to sending.

MCP server: https://md2sign.com/mcp, to validate, preview, draft, test-send, send and track documents
contracts skill: teaches Claude the md2sign markdown format and a safe workflow (it always previews and asks before emailing anyone)
/md2sign:send: a guided "draft, preview, confirm, send" command

Install

In Claude Code (2.1.275 or later):

/plugin install md2sign --marketplace SteamDiesel/md2sign-claude-plugin

Or in two steps on older versions:

/plugin marketplace add SteamDiesel/md2sign-claude-plugin
/plugin install md2sign@md2sign

Or from your terminal:

claude plugin marketplace add SteamDiesel/md2sign-claude-plugin
claude plugin install md2sign@md2sign

Connect your account

Validation and previews work without an account. To save and send documents, add your API key when Claude Code asks during install. It's stored in your system's secure credential store. You can skip it and add or change it later:

/plugin configure md2sign@md2sign

Don't have an account? Just ask Claude to send something: it can create one for you with the create_account tool. You'll get a confirmation email, then choose a plan (from US$4.76/month for 50 signature requests). You can also sign up at md2sign.com and create a key under API keys.

Try it

/md2sign:send A one-page NDA between me (Jane Citizen, jane@example.com) and Sam Lee (sam@acme.com), mutual, 2 years, NSW law

or just say: "Draft a contractor agreement with Sam Lee for $4,800, 50% upfront, and get it signed by both of us."

How it works

You write (or Claude writes) normal markdown with one line per signer:

[[signature: Sam Lee <sam@acme.com> | role: Contractor]]

md2sign emails each signer a link to a clean signing page. Every signature is SHA-256 hash-chained and Ed25519 sealed, and everyone gets the signed PDF with an audit certificate. Anyone can check a document's seal at its public verification page.

Pro (US$26.41/month) adds team members, your logo on emails and PDFs, versioned templates with {{ variables }}, and webhooks that post signed contracts to your CRM or automations.

Links

MIT licensed. md2sign is a service by md2sign.com; using it is subject to the Terms and Privacy Policy.

md2sign

Documentation