# SwiftSign

> SwiftSign is an e-signature API and MCP server built for AI coding tools. One unauthenticated call (POST https://swiftsign.ca/api/v1/signup) returns an sk_test_ sandbox key, no account required. Sandbox is free forever with unlimited watermarked test envelopes. Pro is $15/month flat per workspace for live sends.

Completed documents get a SHA-256 integrity hash and a Certificate of Completion recording the full audit trail: signer identity, email, timestamp, IP address, and signature method. Signatures are intended to be legally binding under the U.S. ESIGN Act, UETA, and Canada's electronic-commerce legislation.

## Docs

- [Quickstart](https://swiftsign.ca/docs): install, get a key, send a sandbox envelope, go live
- [API explorer](https://swiftsign.ca/reference): interactive reference for every endpoint
- [OpenAPI spec](https://swiftsign.ca/openapi.json): machine-readable API description

## Install

- Claude Code: `claude mcp add swiftsign -- npx -y swiftsign-mcp`
- Any MCP-aware client (Cursor, Zed, etc.): run `npx -y swiftsign-mcp` as a stdio server
- Hosted remote MCP: `claude mcp add --transport http swiftsign https://swiftsign.ca/mcp --header "Authorization: Bearer sk_..."` (the first key comes from POST https://swiftsign.ca/api/v1/signup, not from the MCP server; OAuth is also supported)
- [Node SDK](https://www.npmjs.com/package/swiftsign): `npm install swiftsign`
- [Python SDK](https://pypi.org/project/swiftsign/): `pip install swiftsign`

## Pricing

- [Pricing](https://swiftsign.ca/pricing): Sandbox is free forever with unlimited test envelopes. Pro is $15/month flat per workspace, fair use 100 envelopes/month.

## Trust

- [Trust](https://swiftsign.ca/trust): email authentication on signing mail, document integrity and sealing, data location, deletion on request, abuse reporting

## Legal

- [Terms of Service](https://swiftsign.ca/legal/terms)
- [Privacy Policy](https://swiftsign.ca/legal/privacy)
- [Data Processing Addendum](https://swiftsign.ca/legal/dpa)
- [Acceptable Use Policy](https://swiftsign.ca/legal/acceptable-use)
- [Subprocessors](https://swiftsign.ca/legal/subprocessors)