How to Add E-Signatures to Your App Using Cursor

If your team builds with Cursor, adding e-signatures to your product just got a lot simpler. Firma.dev connects to Cursor through two dedicated MCP servers, which means your developers can build signing features, send documents, and manage templates without ever leaving the editor.

No context switching, no pasting API docs into chat windows, no guesswork.

What Cursor + Firma.dev actually does for you

Cursor is an AI-powered code editor that a lot of dev teams have adopted for day-to-day building. Firma.dev plugs into it with two MCP connections that serve different purposes.

The first is the Data MCP server. This one gives Cursor live access to the Firma.dev API. Your developers can manage signing requests, create templates, configure webhooks, and handle workspace settings all through natural language prompts in the editor. Instead of switching between your dashboard and your codebase, everything happens in one place.

The second is the Docs MCP server. This feeds Firma.dev's full documentation into Cursor's AI, so when your team asks it to generate integration code, it pulls from accurate, up-to-date API references instead of hallucinating endpoints. The result is working code on the first try, not a debugging session.

Why this matters for your product

E-signatures are one of those features that every SaaS product eventually needs, but nobody wants to spend weeks building. Contract workflows, onboarding documents, compliance forms. The list grows fast once you start looking at it.

With Firma.dev and Cursor together, your engineering team can ship a complete signing integration in hours. The API handles the hard parts: legally binding signatures that align with ESIGN, UETA, and eIDAS frameworks across the US and EU. Your team just wires it into your app.

And the pricing makes it easy to justify. Firma.dev charges ~3 cents per envelope with no monthly minimums or contracts. Compare that to legacy providers where you're locked into annual commitments before you've even tested the integration.

Get your engineers started

The full technical walkthrough covers everything from connecting both MCP servers to generating your first signing request endpoint. It includes code examples, prompts that work well with Cursor's Composer, and tips for embedded signing.

Read the full Cursor integration guide on docs.firma.dev

Your team can have a working e-signature flow running in their development environment this afternoon. Get started with Firma.dev for free, no credit card required.