API Reference
Build against the SellApp API with guides, reference endpoints, and migration-ready examples.
The SellApp API lets you manage storefront data, automate workflows, and integrate your own tooling against the platform.
Authentication
Learn how API keys are sent and how requests are authenticated.
Errors
Understand error responses and common failure modes.
Pagination
Learn how paginated resource responses are structured.
SDKs & Extensions
Track the migration path for SDK and extension guidance.
Webhooks
Review webhook delivery behavior and payload handling guidance.