Guide to Agentcard Webhooks: Features and Best Practices
In this guide, you will learn how Agentcard webhooks work, how to verify the AgentCard-Signature header (t=<seconds>,v1=<hex HMAC-SHA256 of t.body>, keyed with the whole whsec_ secret), the card, transaction, vault and checkout events, how retries behave, and the best practices for production.