---
title: "Create agent key"
method: POST
path: "/agent-keys"
tags: ["Agent Keys"]
---

# Create agent key

`POST /agent-keys`

Create an agent key for an agent. The secret is returned only once.

## Headers

- `X-Instance-ID` string, nullable

## Request body

- object
  - `data` object, required
    - `attributes` object, required
      - `tags` object — Tags applied to this agent key.
    - `relationships` object, required
      - `agent` object, required — Existing agent the key is bound to.
        - `data` object, required — Related resource identifier.
          - `type` 'agent', required — Resource type. Always `agent`.
          - `id` string, required

## Response `201`

Successful Response

- object
  - `data` object, required
    - `type` 'agentKey', required — Resource type. Always `agentKey`.
    - `id` string, required — Agent key ID (agk_*).
    - `attributes` object, required
      - `agentKeyPrefix` string, required — Non-secret prefix of the agent key, e.g. `ak_ntl_prod_abc123`.
      - `status` 'ACTIVE' | 'REVOKED', required — Agent key status.
      - `createdAt` string, date-time, required — RFC 3339 timestamp when this key was created.
      - `lastUsedAt` string, date-time, nullable, required — RFC 3339 timestamp when this key was last used, or null when never used.
      - `revokedAt` string, date-time, nullable, required — RFC 3339 timestamp when this key was revoked, or null while active.
      - `createdBy` string, nullable, required — User who created this key (usr_*).
      - `revokedBy` string, nullable, required — User who revoked this key (usr_*).
      - `expiresAt` string, date-time, nullable, required — RFC 3339 timestamp when this key stops authenticating, or null when it has no scheduled expiration.
      - `tags` object, required — Metadata visible to anyone who can read the resource.
      - `agentKey` string, required — Full agent key secret. Returned only once.
    - `relationships` object, required
      - `party` object, required — Party that owns the agent key.
        - `data` object, required — Related resource identifier.
          - `type` 'party', required — Resource type. Always `party`.
          - `id` string, required
      - `agent` object, required — Agent this key is bound to.
        - `data` object, required — Related resource identifier.
          - `type` 'agent', required — Resource type. Always `agent`.
          - `id` string, required

## Other responses

- `400` — Validation Error
- `401` — Unauthorized
- `403` — Forbidden
- `404` — Not Found. Returned when the resource does not exist, or when it exists but is not accessible to your account. The two cases are intentionally indistinguishable, so that resource IDs cannot be enumerated by probing.
- `409` — Conflict
- `422` — Validation Error. The response contains one error object for each invalid request value.
- `428` — Precondition Required
- `429` — Too Many Requests
- `500` — Internal Server Error
- `501` — Not Implemented
- `502` — Bad Gateway
- `503` — Service Unavailable

## Changes

- **2026-09-02** `c7c12da5915f` — 12 info
  - added the optional property `errors/items/meta/limitScope` to the response with the `400` status
  - added the optional property `errors/items/meta/limitScope` to the response with the `401` status
  - added the optional property `errors/items/meta/limitScope` to the response with the `403` status
  - added the optional property `errors/items/meta/limitScope` to the response with the `404` status
  - …8 more
- **2026-08-27** `359d267dca88` — 1 info
  - deleted the `header` request parameter `X-Agent-ID` with deprecation
- **2026-08-23** `b1ad79e918ac` — 1 info
  - `header` request parameter `X-Agent-ID` was deprecated
- **2026-08-14** `7271de071ca5` — 2 info
  - added the new optional request property `data/attributes/tags`
  - added the required property `data/attributes/tags` to the response with the `201` status

[Change history](https://skmtc.dev/natural/apis/natural-api/changes/agent-keys/post.md)

---

[API](https://skmtc.dev/natural/apis/natural-api.md) · [All operations](https://skmtc.dev/natural/apis/natural-api/llms.txt) · [OpenAPI document](https://skmtc.dev/natural/apis/natural-api/revisions/1132c9ddb7bd?raw)