Common APIs - Base44 Support Documentation

These are the APIs you’ll call most often when building your integration. The API reference documents every field and payload in full, including less commonly used endpoints not listed here.

Endpoint	When you need it
Create app	Create an app from a prompt.
Send chat message	Every prompt after the first.
Get app	Poll for the state of a build.
Read conversation messages	Get the transcript, and find a tool call that is waiting.
Submit tool-call input	Answer a waiting question and resume the turn.
Submit tool-call input (batch)	Answer several waiting questions with one decision.
Get preview URL	Let a builder see unpublished changes before you deploy.
Deploy an app	Publish an app.
Get published URL	Get a link to a live app.
List apps	Show a builder the apps they already have.
Stop generation	Give the builder a cancel button.
Undo message	Roll the app back to before a message.
Edit and resend	Let a builder reword a prompt and run the turn again.
List checkpoints	Show saved versions, and pick one to deploy.
Set secret	Put your own API keys into an app’s backend functions.
Export app source code	Hand a builder the code, or keep your own copy.