Developers
A REST API for SEPA that doesn’t fight you.
Sandbox in minutes, production in days. Idempotent endpoints, signed webhooks, OpenAPI 3.1, and a sandbox that mirrors production 1:1 — including failure scenarios.
Sandbox login
Spin up a free sandbox account with mock IBANs, test mandates, and a full set of programmable failure cases — from R-message responses to instant-transfer time-outs.
API documentation
Browsable OpenAPI 3.1 reference, code samples in cURL, Node, Python and PHP, plus end-to-end recipes for the most common SEPA flows.
What you get from day one.
- OpenAPI 3.1 spec with generated client SDKs.
- Idempotency keys on every state-changing endpoint.
- Signed webhooks (HMAC-SHA256) with replay protection.
- Mock IBANs and deterministic R-transaction simulation.
- Audit logs per API key, exportable for compliance.
- Versioned API with deprecation windows of 12 months minimum.
Developer support
Real engineers on a Slack channel, Mon–Fri 08:00–20:00 CET, with on-call coverage for production incidents around the clock.
- Email: developers@nexinity.eu (placeholder — to be confirmed)
- Status page: status.nexinity.eu (placeholder)
- Production incident hotline: +48 22 000 0000 (placeholder)
- Sandbox login: sandbox.nexora.cash
- API docs: sandbox-api.nexora.cash