Introduction
Welcome to the Pier API reference! These docs should help you get started quickly and easily.
Environments
The Pier API is accessible in two environments:
| Environment | API url |
|---|---|
| Sandbox | sandbox.pier-finance.com/api |
| Production | production.pier-finance.com/api |
The sandbox is designed to mimic the production environment, with a few exceptions. Loan agreements created in the sandbox will have large ‘draft’ watermarks and funds flows will only occur in production. Sandbox API keys are prefixed with test_ while production API keys are prefixed with prod_.
Postman collection
You can fork our Postman collection to immediately start interacting with the API. You’ll need to set two variables to get started:
| Variable | Description |
|---|---|
api-secret | Your API secret |
url | This should generally be set to sandbox.pier-finance.com |
Authentication
Pier uses basic auth to authenticate API requests. All calls should be made with the username field left empty and the password field set to your API key. Remember to prefix your API key with a colon.
Rate limits and retrying API requests
Only 5xx (Server Errors) and 429 (Rate Limits) errors should be retried.
Pier’s rate limit is set to 1,000 requests per minute. The limit applies to both the sandbox and production environments. If a rate limit is triggered, we will respond with a 429 status code.
High-level origination flow
The following diagram outlines how the Pier origination flow works with the Borrower, Application and Loan Agreement resources:
Pier origination flow
