Stable codes
Every error has a stable code and protocol-specific context for UCP, ACP, or MCP clients.
Agent-first commerce middleware for autonomous shopping agents.
Agent-friendly errors expose retryable, retry_after, route, protocol, and docs_url in a machine-readable API envelope.
Every error has a stable code and protocol-specific context for UCP, ACP, or MCP clients.
Retryable errors include retry_after so agents can back off automatically.
Human-readable messages and docs links help operators debug the same event.