API V3

Check Printing & Mailing API

Mail checks anywhere in the world with a simple API call. Easily return a perfectly-formatted PDF for self-printing.

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$
    {
        amount: 1250.55,
        number: 5002,
        payee: {
            name: "John Smith",
            address: "101 North Main Street"
        },
        account: 099834873,
        routing: 123456789
    }
                

Same-day Mailing. The fastest and latest turn-around time in the industry: submit by 4pm EST and checks are mailed the same day.

Attach Documents. Attach an unlimited number of documents to a check being mailed. Include invoices, EOBs, bills... anything!

Express Delivery Deliver your checks and documents as early as the next business day — with tracking!

Return PDF. Request a fully customized and perfectly formatted check pdf ready for self-printing.

Every possible check designed

Templates as unique as your client, Checkeeper's API has you covered. We've seen them all and have a version of every possible check layout you can think of. Have something completely unique you need? Let us give you a custom layout to fit your exact needs.

  • Dozens of available templates
  • Get formatted, ready-to-print check PDFs
  • Print checks within your application
Read Documentation

No Client Onboarding

Checkeeper's no-onboarding approach eliminates the need to assign clients or account information before creating checks. Bank account and routing information is transmitted in real time, as request transactions occur leaving any client-side verification to our partner's product and process.

Checks delivered as quickly as you can code

Same day processing and next-day delivery

Next business day mailing if submitted after 4pm

Tracking Information delivered to your webhook

Overnight payroll batches

The original check printing API. The most powerful capabilities.

Checkeeper introduced its check printing API in early 2010. Since then, it has grown to produce more than 5 million checks annually. Major financial brands depend daily on Checkeeper's speed, reliability, and flexibility.

Commitment to Security and Trust

SOC2 and HIPAA compliance is a testament to Checkeeper's commitment to security, efficiency, and trustworthiness. In a fintech landscape, where data breaches and cyber threats are an ever-present concern, partnering with Checkeeper offers an added layer of assurance. These compliances are not just a badge of honor for Checkeeper; they're a promise of quality, reliability, and security for all its customers.

SOC 2