# md2sign

> Markdown to legally binding e-signatures, built for AI agents. Remote MCP server, simple REST API, $4.76/month for 50 signature requests.

md2sign sends a markdown contract for e-signature. Add one field per signer: [[signature: First Last <email@example.com>]] (optional "| role: Title"). Hidden style directive: <!-- md2sign:style=classic|modern|formal -->. Each recipient gets an email with the rendered document and a unique signing link. Signatures are SHA-256 hash-chained and Ed25519-sealed; everyone receives a PDF with an audit certificate.

Agents can create an account for their human (POST /api/v1/signup or the MCP tool create_account), validate and preview markdown without an account, save and update drafts, send a free test copy, then send once the human has confirmed their email and subscribed.

## Docs
- [API & MCP reference](https://md2sign.com/docs): full reference (markdown version: https://md2sign.com/llms-full.txt)
- [OpenAPI spec](https://md2sign.com/openapi.json)
- [MCP endpoint](https://md2sign.com/mcp): streamable HTTP, Authorization: Bearer <api_key>
- [Agent quick start](https://md2sign.com/agents)

## Pricing
- Starter: $4.76 USD/month, 50 signature requests (1 per recipient)
- Pro: $26.41 USD/month, 500 signature requests
- Free: validate, render previews, drafts, test sends to yourself

## Optional
- [Verify a signed document](https://md2sign.com/verify/{document_id})
- [Seal public key](https://md2sign.com/.well-known/md2sign-seal-key)
- [Terms](https://md2sign.com/terms), [Privacy](https://md2sign.com/privacy), [E-signature disclosure](https://md2sign.com/esign-disclosure)