Visa Pay

Authentication Token Management

Implement proper token management practices to maintain secure and uninterrupted access to Visa Pay API endpoints.

Effective token management ensures continuous API access and prevents authentication failures. Both OAuth2 and basic authentication methods provide access tokens and refresh tokens that require proper handling.

Token Expiration Monitoring

Access tokens have limited lifespans to maintain security. Monitor token expiration times to prevent authentication failures during API calls.

Best practices for expiration monitoring:

• Track token expiration timestamps from authentication responses
• Set up alerts before tokens expire
• Implement buffer time before actual expiration for refresh operations

Automatic Token Refresh

Refresh tokens allow you to obtain new access tokens without re-authenticating. Implement automatic refresh procedures to maintain seamless API access.

Token refresh considerations:

• Refresh tokens before access token expiration
• Handle refresh token expiration and re-authentication scenarios
• Implement retry logic for failed refresh attempts
• Store new tokens securely after successful refresh

Token Caching and Storage

Proper token caching minimizes authentication overhead and improves application performance while maintaining security.

Caching best practices:

• Cache tokens in secure, encrypted storage
• Implement appropriate cache expiration policies
• Use in-memory caching for high-frequency API calls
• Clear cached tokens upon logout or security events

Error Handling

Robust error handling ensures your application responds appropriately to authentication issues.

Handle these common scenarios:

• Expired access tokens - automatically refresh and retry
• Invalid refresh tokens - re-authenticate using credentials
• Network failures during token refresh - implement retry with backoff
• Rate limiting on authentication endpoints - respect retry-after headers

Security Considerations

Token security protects your API access and prevents unauthorized usage. Security best practices:

• Store tokens in secure, encrypted storage systems
• Transmit tokens only over HTTPS connections
• Implement token rotation policies
• Log authentication events for security monitoring
• Revoke tokens when no longer needed