---
title: "List extension schemas"
method: GET
path: "/extension_schemas"
tags: ["Extension Schemas"]
---

# List extension schemas

`GET /extension_schemas`

List all extension schemas.

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

For more information see the [API Concepts Document](../../api-reference/a47605517c19a-api-concepts#extension-schemas)

Scoped OAuth requires: `extension_schemas.read`

## Query parameters

- `limit` integer
- `offset` integer
- `total` boolean

## Headers

- `Accept` string, required
- `Content-Type` 'application/json', required

## Response `200`

A paginated array of extension schemas.

- object
  - `offset` integer — Echoes offset pagination property.
  - `limit` integer — Echoes limit pagination property.
  - `more` boolean — Indicates if there are additional records to return
  - `total` integer, nullable — The total number of records matching the given query.
  - `extension_schemas` ExtensionSchema[], required
    - `icon_url` string, url — A small logo, 18-by-18 pixels.
    - `logo_url` string, url — A large logo, 75 pixels high and no more than 300 pixels wide.
    - `label` string — Human friendly display label
    - `key` string — Machine friendly display label
    - `description` string — The long description for the Extension
    - `guide_url` string, url — A link to the extension's support guide
    - `send_types` string[] — The types of PagerDuty incident events that will activate this Extension
    - `url` string — The url that the webhook payload will be sent to for this Extension.

## Other responses

- `400` — Caller provided invalid arguments. Please review the response for error details. Retrying with the same arguments will *not* work.
- `401` — Caller did not supply credentials or did not provide the correct credentials. If you are using an API key, it may be invalid or your Authorization header may be malformed.
- `403` — Caller is not authorized to view the requested resource. While your authentication is valid, the authenticated user or token does not have permission to perform this action.
- `429` — Too many requests have been made, the rate limit has been reached.

---

[API](https://skmtc.net/pagerduty/apis/rest-api.md) · [All operations](https://skmtc.net/pagerduty/apis/rest-api/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/pagerduty/rest-api/versions/b679a8f3f02c/schema)