---
title: "Link a new (kind, externalId) identity to this user"
method: POST
path: "/api/users/{id}/identities"
tags: ["Users"]
---

# Link a new (kind, externalId) identity to this user

`POST /api/users/{id}/identities`

## Path parameters

- `id` string, required

## Request body

- object
  - `kind` string, required
  - `externalId` string, required

## Response `200`

Updated identity list

- object
  - `identities` object[], required
    - `kind` string, required
    - `externalId` string, required

## Other responses

- `400` — Validation error or PK collision
- `401` — Unauthorized
- `404` — User not found

## Changes

- **2026-08-07** `06cac6a7c5bc` — 4 info
  - added the media type `application/json` for the response with the status `200`
  - added the media type `application/json` for the response with the status `400`
  - added the media type `application/json` for the response with the status `401`
  - added the media type `application/json` for the response with the status `404`

[Change history](https://skmtc.dev/desplega-ai/apis/agent-swarm-api/changes/api/users/:id/identities/post.md)

---

[API](https://skmtc.dev/desplega-ai/apis/agent-swarm-api.md) · [All operations](https://skmtc.dev/desplega-ai/apis/agent-swarm-api/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/desplega-ai/agent-swarm-api/revisions/e0acd2155cad/schema)