SignForge

Send documents for e-signature directly from Claude Desktop, Claude Code, Cursor, and other AI agents — powered bySignForge, the free e-signature platform.

Sign up atsignforge.ioand generate an API key from yourDeveloper Settings.

{ "mcpServers": { "signforge": { "command": "npx", "args": ["-y", "@signforge/mcp-server"], "env": { "SIGNFORGE_API_KEY": "your-api-key-here" } } } }

- macOS:~/Library/Application Support/Claude/claude_desktop_config.json
- Windows:%APPDATA%\Claude\claude_desktop_config.json

claude mcp add signforge -- npx -y @signforge/mcp-server

Then set the environment variable in your shell:

export SIGNFORGE_API_KEY="your-api-key-here"

Add to your Cursor MCP settings (.cursor/mcp.json):

{ "mcpServers": { "signforge": { "command": "npx", "args": ["-y", "@signforge/mcp-server"], "env": { "SIGNFORGE_API_KEY": "your-api-key-here" } } } }

SIGNFORGE_API_KEY="your-api-key-here" npx -y @signforge/mcp-server

Restart Claude Desktop, Claude Code, or Cursor to pick up the new MCP server.

You: Send my NDA at ~/Documents/nda.pdf to jane@example.com (Jane Smith) for signature. AI: I'll send that NDA for signature now. [Uses create_and_send tool] Done! I've created and sent the envelope: - Envelope ID: a1b2c3d4-... - Status: sent - Jane Smith (jane@example.com) will receive a signing link via email.

You: Has Jane signed the NDA yet? AI: Let me check. [Uses check_status tool] Yes! Jane signed it on April 7 at 2:15 PM. The envelope is now completed. You: Great, download the signed copy and the audit certificate. [Uses download_signed tool] [Uses download_certificate tool] Done! Files saved: - Signed PDF: ~/Documents/nda-signed.pdf - Audit Certificate: ~/Documents/nda-certificate.pdf

You: Send our standard consulting agreement to bob@acme.com. Pre-fill the company name as "Acme Corp" and the start date as "May 1, 2026". AI: I'll create that from your consulting agreement template. [Uses list_templates tool — finds "Consulting Agreement" template] [Uses create_from_template tool — with prefill_fields and send_immediately: true] Done! Envelope created and sent: - Title: Consulting Agreement - Recipient: bob@acme.com - Pre-filled: company = "Acme Corp", start_date = "May 1, 2026" - Status: sent

You: List my sent envelopes. [Uses list_envelopes tool with status: "sent"] You: Void the contract for Project Alpha — the deal fell through. [Uses void_envelope tool with reason] You: Now delete it. [Uses delete_envelope tool] Done — envelope voided and deleted.

You: Set up a webhook to notify my server when documents are signed or completed. [Uses create_webhook tool] Webhook created: - URL: https://api.yourapp.com/webhooks/signforge - Events: envelope.signed, envelope.completed - Secret: whsec_abc123... (save this for signature verification!)

API keys created in sandbox mode will create test envelopes that don't send real emails. Use sandbox mode during development and testing.

"SIGNFORGE_API_KEY environment variable is required"Make sure you've set theSIGNFORGE_API_KEYin your MCP client configuration. See the setup instructions above.

"SignForge API error (401)"Your API key is invalid or expired. Generate a new one atsignforge.io/dashboard/developers.

- SignForge— Free e-signature platform
- API Documentation— Full API reference
- GitHub— Source code
- MCP Protocol— Model Context Protocol specification

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