Resources · Developer Docs

Build on B4B Payments.

API-first financial infrastructure - cards, accounts, payments, and FX. JSON REST APIs, OAuth 2.0 authentication, real-time webhooks, and a sandbox environment.

Getting started

Core APIs and integration resources.

Our full API guides, reference documentation, and sandbox access are available on request. Get in touch to request developer access and we'll set you up.

Cards API

Create, activate, load, unload, suspend, cancel. Set controls. Bulk operations. Physical and virtual.

Accounts API

Create accounts, get balances, list transactions. VIBAN management for fund segregation.

Payments API

Initiate payments via SWIFT, SEPA, Faster Payments, ACH. Beneficiary management. Bulk and scheduled payments.

FX API

Get live rates, initiate conversions, held-rate workflows for approval processes.

Get in touch to request API access

Developer tools

Webhooks, sandbox, and integration support.

Webhooks

Real-time notifications for card spend, payments, and status changes. All webhook payloads are signed for verification.

Sandbox environment

Test your integration in a safe environment before going live. Mirrors production APIs with test credentials.

Authentication

OAuth 2.0 customer credentials flow. Tokens valid for 60 minutes with programmatic refresh.

Developer support

Technical questions about the API? Contact us or visit the Support Centre.

Next step

Bring product, engineering, and compliance into one B4B Payments conversation.

Use the developer pathway to reduce friction in technical evaluation and partner onboarding.