> Documentation index for AI agents: https://docs.pagerduty.com/llms.txt

# Extension Schemas

A PagerDuty extension vendor represents a specific type of outbound extension such as Generic Webhook, Slack, ServiceNow.

- [List extension schemas](https://docs.pagerduty.com/developer/api/reference/rest/extension-schemas/list-extension-schemas.md) — `GET /extension_schemas`
- [Get an extension vendor](https://docs.pagerduty.com/developer/api/reference/rest/extension-schemas/get-extension-schema.md) — `GET /extension_schemas/{id}`

## Developer Agreement

Your access to and use of the PagerDuty Developer Services is governed by the [PagerDuty Developer Agreement](https://docs.pagerduty.com/developer/pagerduty-developer-agreement).