Get extension schema by id
Retrieves a specific extension schema from PagerDuty by its unique identifier. Extension schemas are pre-defined templates that define how PagerDuty integrates with external systems (like webhooks, Slack, Amazon EventBridge, ServiceNow, etc.). Each schema contains configuration details, supported webhook event types (trigger, acknowledge, resolve, etc.), UI elements (icons, logos), and metadata about the integration. This endpoint returns the complete definition of a specific extension schema including its label, description, required configuration fields, send types, features, and addon information. Use this action when you need to understand the capabilities and configuration requirements of a specific integration type before creating an extension instance. The schema ID can be obtained from the list extension schemas endpoint. This is a read-only operation that doesn't modify any data.