DSP API Webhooks – Release Notes

1.0.4 – August 2026

• Clarified ISO-8601 datetime format requirements for webhook payloads (timezone designator required; UTC recommended; rejected offset forms such as +0000)
• Documented that payload parse failures return 400 Bad Request with the opaque code invalid_json

1.0.3 – June 2026

• Added documentation for refund webhook updates at {Webhook Url}/refunds

1.0.2 – March 2026

• Added a Release Notes page to the API documentation