Developer Guide

How to Add E-Signatures with Claude Code

To add e-signatures with Claude Code: install the TurboDocx Quickstart Skill (npx skills add TurboDocx/quickstart), add your API key to .env, then ask Claude Code to “add TurboSign e-signatures to my app.” The agent writes the integration for you.

This is the fastest way to vibecode an e-signature flow. One skill, one prompt, and a runnable TurboSign integration in your Node, Python, Go, PHP, or Java project.

Install the Quickstart Skill Skill on GitHub Get API Key Free

5 min

One prompt to working code

Any stack

TS, Python, Go, PHP, Java

MIT

Open-source skill

Install the TurboDocx Quickstart Skill

From your project directory, run the open-source skills CLI. It clones the skill and writes it to .claude/skills/, where Claude Code picks it up automatically.

terminal

npx skills add TurboDocx/quickstart

Pick your skills: the CLI prompts you to choose turbodocx-sdk (e-signatures) and/or @turbodocx/html-to-docx (HTML → Word). For e-signatures, select turbodocx-sdk. Requires Node.js 18+ to run the installer.

Add Your API Key

The skill reads your API key from an environment variable, and it never hardcodes secrets. Grab your credentials from the dashboard and drop them into .env.

Sign up for a free account at TurboDocx (5 signatures/month free)
Navigate to Settings → API Keys
Copy your API Key and Organization ID

.env

TURBODOCX_API_KEY=your_api_key_here
TURBODOCX_ORG_ID=your_org_id_here
TURBODOCX_SENDER_EMAIL=you@company.com
TURBODOCX_SENDER_NAME=Your Company Name

No key yet? Tell Claude Code you don't have one, and the skill walks the agent through prompting you to sign up and paste the key into .env.

Prompt Claude Code

Now describe what you want in plain English. Claude Code invokes the /turbodocx-sdk skill, detects your language and framework, installs the matching SDK, and writes a runnable integration.

“Add TurboSign e-signatures to my Express app”

“Send this contract PDF for signature when a deal closes”

“Add a /signatures/:id/download endpoint that returns the signed PDF”

“Wire up a webhook so I get notified when a document is signed”

claude code

> Add TurboSign e-signatures to my Express app

# Claude Code:
  • Invoking skill /turbodocx-sdk
  • Detected: Node.js + Express (package.json)
  • Installing @turbodocx/sdk…
  • Reading credentials from .env
  • Wrote src/turbosign.ts (integration module)
  • Wrote routes/sign.ts (runnable example)
  ✓ Run: node routes/sign.ts

Tip: review the diff like any PR. The skill generates a self-contained module plus an example you can run immediately. Nothing is hidden behind magic.

Run It and Send Your First Signature

Run the example the agent generated. Your recipient receives an email with a link to sign, and TurboSign handles delivery, signature collection, and a legally-binding audit trail. Ask Claude Code to add a webhook handler so your app reacts when the document is completed.

What the generated integration handles:

Authentication and document delivery
Multiple recipients with sequential signing order
Signature, initials, date, and text fields
Webhooks for real-time completion events and audit trails

Related Guides

Cursor Guide

Add E-Signatures with Cursor

Same skill, inside the AI-first editor. Prompt Cursor to wire up TurboSign.

Read Guide

JavaScript Guide

Sign Documents with JavaScript

Prefer to write it by hand? The Node.js / TypeScript SDK reference.

Read Guide

Resources

Quickstart Skill

How the one-command agent skill works.

AI Engineering Guide

Ship backend features with AI coding agents.

Skill on GitHub

MIT-licensed source and examples.

Frequently Asked Questions

How do I add e-signatures with Claude Code?

Install the TurboDocx Quickstart Skill (npx skills add TurboDocx/quickstart), add your API key to .env, then ask Claude Code to “add TurboSign e-signatures to my app.” The agent detects your language and framework, installs the right SDK, and writes a working integration.

Can I vibecode an e-signature flow without reading the docs?

Yes. The Quickstart Skill teaches Claude Code how TurboSign works, so you describe what you want in plain English and the agent writes the integration code. You review and run it. No SDK archaeology required.

Does this work without a backend?

TurboDocx is a hosted API, so signing, audit trails, and delivery run on TurboDocx infrastructure. You only need a place to call the API from: a server route, a serverless function, or a script. The Quickstart Skill generates whichever fits your project.

Which languages does the skill support?

The turbodocx-sdk skill detects TypeScript/JavaScript, Python, Go, PHP, or Java from your manifest files and installs the matching SDK.

One Prompt Away from Shipping

Install the Quickstart Skill, open Claude Code, and tell it what you want to build. Your first 5 signatures every month are free.

Install the Quickstart Skill Learn More About the API