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With the Intelliprint hybrid mail API, you can send UK postal mail (letters and postcards) in just a few lines of code. Our REST API accepts JSON and returns standard HTTP responses, making it easy to integrate into your existing systems.
Test without charging your account - Set testmode: true in any request to preview your mailings without being charged or having them physically sent.

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Get started

Choose your path to start sending mail with Intelliprint.

Send your first letter

Create and send a letter using HTML content in minutes

Send from PDF

Upload a PDF with addresses and split into multiple letters

Bulk mailing campaigns

Send to mailing lists with personalised templates

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Quick example

Send your first letter with just a few lines of code: 
import Intelliprint from 'intelliprint';
const ip = Intelliprint('your-api-key-here');

const printJob = await ip.prints.create({
  testmode: true,  // Remove this to actually send
  content: '<h1>Hello!</h1><p>Welcome to Intelliprint.</p>',
  recipients: [{
    address: {
      name: 'John Doe',
      line: '123 Main St, London',
      postcode: 'SW1A 1AA',
      country: 'GB'
    }
  }],
  confirmed: true
});

console.log('Print job created:', printJob.id);
That’s it! Your letter is now in our print queue and will be printed and mailed within 1 business day.

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Try it out

1

Get your API key

Create an API key in your Intelliprint dashboard.
Store your API key securely - treat it like a password!
2

Install the SDK (optional)

Choose your preferred language:
npm install intelliprint
3

Make your first request

Copy the code example above and replace your-api-key-here with your actual API key.
Keep testmode: true while testing - you won’t be charged and mail won’t be sent.

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Choose your workflow

Not sure which approach to use? We’ve got you covered.

Decision Guide: Choose Your Path

Interactive guide to help you pick the right workflow for your use case

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Core concepts

Understand the fundamentals of the Intelliprint API.

Overview & Concepts

Authentication, objects, test mode, and confirmation workflows

API Reference

Complete API reference with all endpoints and parameters

Track & Manage

Track delivery, retrieve details, and cancel print jobs

Understand Costs

How pricing works and how to calculate costs

Backgrounds & Letterheads

Apply your company branding to all letters automatically

Extra Documents

Include terms & conditions, brochures, or forms

Postage & Scheduling

Choose delivery speed and schedule mailings

Address Window Positioning

Fine-tune address placement for perfect envelope windows

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Need help?

Errors & Troubleshooting

Common errors and how to fix them