CBSGroup payment middleware

Tingg API gateway and sandbox proof surface

This entrypoint fronts the CBSGroup Tingg middleware. Use Swagger for interactive testing, OpenAPI for the machine-readable contract, and the proof route for sandbox evidence runs.

Open Swagger UI View OpenAPI JSON Health check

Public base: https://cbsgroup.sankofa.nexus
Subscription path: https://cbsgroup.sankofa.nexus/tingg
Proof route: https://cbsgroup.sankofa.nexus/v1/admin/tenants/cbsgroup/sandbox-proof