Production-ready reference
Every endpoint, parameter, and response shape. Optimized for auditors, engineers, and ops specialists.
Open API reference →Operate PayCA Cards: Secure Issuing & Spending Made Simple.
Explore the full OpenAPI surface, study fund, fee, and webhook flows, and ship compliant financial integrations without guesswork.
Operational playbooks
Understand how funds travel through client/user accounts, cards, and revenue wallets with real payloads and ledger entries.
Jump to guides →Sandbox walkthroughs
Replay card lifecycles and webhook deliveries locally using the sandbox tooling that mirrors production.
Test webhooks →Latest guides
Short, structured articles that explain how we move funds, recognise revenue, and keep users in sync.
Reloading BIN Fee Cache
How to refresh the in-memory BIN fee cache on workers without a restart.
API Authentication & Request Hygiene
Understand headers, idempotency keys, pagination, and error handling conventions for every PayCA endpoint.
Apple & Google Pay Tokenization
Enable wallet-ready BINs, start tokenization, and process webhook OTP payloads for wallet attachment.
Fees & Revenue Recognition
Track fees surfaced through PayCA APIs and webhooks so finance teams can reconcile revenue accurately.
Getting Started With PayCA
Spin up credentials, configure environments, and make your first PayCA API calls in less than an hour.
Go-Live Runbook
Coordinate engineering, finance, and support for a smooth transition from sandbox to production.
Money Movement Overview
A client-facing map of how money moves across cards, master accounts, and fee entries.
Moving Funds & Reconciliation
Operate card liquidity from master accounts and reconcile every balance movement with webhook evidence.
Programme Entities
Understand the core objects exposed through the PayCA API for master-account integrations.
Sandbox Playbook
Use PayCA sandbox to simulate card spend, fees, and webhook retries before production launch.
Webhook Balance Effects
Exact webhook types, payload fields, and expected balance impact on master accounts and cards.
Webhook Handling Patterns
Verify signatures, store payloads idempotently, and replay missed deliveries with confidence.