Documentation | Checkbook

All endpoints must include an Authorization header. We use the standard HTTP Authorization header to pass authentication information.

These can be found under on the Settings page. Choose the Developer tab from the menu panel and take note of the API Key and API Secret provided.

Recipients instantly receive their check via email and can choose to either deposit the check online or print for in person or mobile deposit. You can find more details about the deposit options here.

Go to the Send a Check page on


API Keys by Environments

The API keys are different in each environment.You need to use your Sandbox keys in the Sandbox environment and your Production keys in the Production environment. Click on the GO TO SANDBOX button to switch to the Sandbox environment and get the API keys.