---
title: "GET /idnamespaces"
method: GET
path: "/idnamespaces"
---

# GET /idnamespaces

`GET /idnamespaces`

Returns a list of all ID namespaces.

## Query parameters

- `nextToken` string
- `maxResults` integer

## Response `200`

Success

- ListIdNamespacesOutput
  - `idNamespaceSummaries` IdNamespaceSummary[] — A list of <code>IdNamespaceSummaries</code> objects.
    - `idNamespaceName` string, required — The name of the ID namespace.
    - `idNamespaceArn` string, required — The Amazon Resource Name (ARN) of the ID namespace.
    - `description` string — The description of the ID namespace.
    - `idMappingWorkflowProperties` IdNamespaceIdMappingWorkflowMetadata[] — An object which defines any additional configurations required by the ID mapping workflow.
      - `idMappingType` 'PROVIDER' | 'RULE_BASED', required — The type of ID mapping.
    - `type` 'SOURCE' | 'TARGET', required — <p>The type of ID namespace. There are two types: <code>SOURCE</code> and <code>TARGET</code>.</p> <p>The <code>SOURCE</code> contains configurations for <code>sourceId</code> data that will be processed in an ID mapping workflow. </p> <p>The <code>TARGET</code> contains a configuration of <code>targetId</code> which all <code>sourceIds</code> will resolve to.</p>
    - `createdAt` string, date-time, required — The timestamp of when the ID namespace was created.
    - `updatedAt` string, date-time, required — The timestamp of when the ID namespace was last updated.
  - `nextToken` string — The pagination token from the previous API call.

## Other responses

- `480` — ThrottlingException
- `481` — InternalServerException
- `482` — AccessDeniedException
- `483` — ValidationException

---

[API](https://skmtc.net/aws/apis/entityresolution.md) · [All operations](https://skmtc.net/aws/apis/entityresolution/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/aws/entityresolution/versions/480b85498767/schema)