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This API lets you fetch all invoices or debtors in an administration in a paginated fashion from api.paytsoftware.com. It requires the API module to be enabled for the administration. Setting up authorization is explained here, and the full endpoint reference is in the API Reference.

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Base URL

All API requests go to: 
https://api.paytsoftware.com
Use https://demo-api.paytsoftware.com for testing against the demo environment. See Testing for how to set up a free demo account.

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Requirements

  • TLS 1.2 or higher (SSL required on all requests)
  • OAuth2 Bearer token or static API token in the Authorization header
  • All monetary values are strings with two decimals
  • All timestamps are UTC, formatted as ISO 8601

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Keep in mind

  • Use index endpoints when you need data for multiple records: do not fire multiple requests at show endpoints. Use the cursor from the last response to request the next page (see Pagination & syncing).
  • POST and PATCH endpoints return a response with a success count and errors. See the responses page.
  • Some fields are only returned when explicitly requested through the fields parameter. Check the response model in the API Reference to see which fields require an explicit request.

Authentication

Authorize your app and obtain access tokens.

Pagination & syncing

Page through results and sync only what changed.
Last modified on June 13, 2026