Sezzle API v2
The primary Sezzle REST API for merchants who want to accept Sezzle as a payment option. Provides endpoints for authentication, checkout session creation, order management (capture, refund, release, reauthorize, upcharge), customer tokenization, webhook management, and settlement reporting.
Documentation
Documentation
https://docs.sezzle.com/docs/api/intro
Authentication
https://docs.sezzle.com/docs/api/intro
RateLimits
https://raw.githubusercontent.com/api-evangelist/sezzle/refs/heads/main/rate-limits/rate-limits.yml
Specifications
Other Resources
Sandbox
https://sandbox.gateway.sezzle.com/v2
Plans
https://raw.githubusercontent.com/api-evangelist/sezzle/refs/heads/main/plans/plans.yml
FinOps
https://raw.githubusercontent.com/api-evangelist/sezzle/refs/heads/main/finops/finops.yml
APIsJSON
https://raw.githubusercontent.com/api-evangelist/sezzle/refs/heads/main/apis.yml