---
title: "List Sources"
method: HEAD
path: "/sources"
tags: ["Sources"]
---

# List Sources

`HEAD /sources`

Return Sources path headers

## Query parameters

- `label` string
- `reverse_order` boolean
- `sort_by` 'created' | 'updated' | 'label'
- `tag.{name}` string — A list of tag values, formatted for use in query string parameters
- `tag_exists.{name}` boolean
- `format` 'urn:x-nmos:format:video' | 'urn:x-tam:format:image' | 'urn:x-nmos:format:audio' | 'urn:x-nmos:format:data' | 'urn:x-nmos:format:multi', uri — Identifies the content format for a Flow or Source using a URN string
- `collected_by_ids` string — A list of Universally Unique Identifiers (UUIDs) as defined in [RFC9562](https://www.rfc-editor.org/rfc/rfc9562), formatted for use in query string parameters, or an empty string. An empty value selects resources that are not in any collection.
- `page` string
- `limit` integer

## Response `200`

- string

## Other responses

- `400` — Bad request. Query parameters are invalid.

## Changes

> 23 revisions in range; 16 could not be searched.

- **2025-04-24** `b01aaf8cffe2` — 1 breaking, 2 info
  - removed the enum value `urn:x-tam:format:image` from the `query` request parameter `format`
  - removed the pattern `^([^,]+(,[^,]+)*)?$` from the `query` request parameter `tag.{name}`
  - for the `query` request parameter `format`, the type/format was generalized from `string`/`uri` to `string`/``

[Change history](https://skmtc.dev/aws-samples/apis/time-addressable-media-store/changes/sources/head.md)

---

[API](https://skmtc.dev/aws-samples/apis/time-addressable-media-store.md) · [All operations](https://skmtc.dev/aws-samples/apis/time-addressable-media-store/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/aws-samples/time-addressable-media-store/revisions/eb3977b33601/schema)