TrueLayer Sandbox
Last verified 2026-08-09
TrueLayer is an open-banking platform for account data and payments across the UK and Europe. Its sandbox exposes a fictitious Mock Bank and sandbox provider IDs so developers can test authorization, data retrieval and payment outcomes (execution, rejection, cancellation) using mock credentials.
Key specs
| Free tier | Free (sandbox) |
| Cost | Free |
| Testing | Mock Bank + test users |
Strengths
- Mock Bank and test users
- Deterministic payment outcomes
- Covers both data and payments
Trade-offs
- Open-banking model is region-specific
- Live access needs regulatory-grade onboarding
Best for: Developers building open-banking data or payment integrations across the UK and EU.
How the TrueLayer sandbox works
TrueLayer is an open-banking platform for account data and payments across the UK and Europe, and its sandbox lets you build against a fictitious Mock Bank instead of a real institution. Sandbox provider IDs and mock user credentials let you complete the full authorization redirect, retrieve test account data, and drive payment outcomes such as execution, rejection and cancellation. It is free. The considerations are that open banking is inherently region-specific, and moving to live data requires regulatory-grade onboarding appropriate to handling real bank connections.
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Sources: TrueLayer test payments in sandbox ↗ · TrueLayer quickstart ↗
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