Introduction to Data API

Access UserOperation data on all EVM networks supported by Stackup.

Stackup's Data API gives you easy and efficient access to UserOperation data across all supported EVM networks. You can query for historical information about UserOperations and calculate gas price for transactions sponsored by Paymasters.


Looking for an interactive guide to the Data APIs?

Checkout the Data API reference page.

In the following sections, you'll find detailed information about:

🔐 Authenticating with the Data API

🚰 Rate limits imposed by the Data API

🚑 Known error codes and JSON responses

📘Pagination for handling results with large data sets