---
title: "Create agent"
method: POST
path: "/agents"
tags: ["Agents"]
---

# Create agent

`POST /agents`

Create an agent

## Headers

- `Idempotency-Key` string, required
- `X-Instance-ID` string, nullable

## Request body

- object
  - `data` object, required
    - `attributes` object, required
      - `name` string, required — Agent display name.
      - `description` string — Agent description.
      - `tags` object — Key-value metadata stored on the resource. At most 30 keys; keys 1-128 characters, alphanumeric and underscores; values 1-256 characters. Visible to anyone who can read the resource; do not include sensitive data.
      - `slug` string — Agent-specific part of the handle, such as support in @acme-support.
      - `limits` object — Agent spending limits. Agent credentials cannot set them.
        - `perTransaction` integer, nullable — Per-transaction spending limit in cents, or null for no limit.
        - `perDay` integer, nullable — Daily spending limit in cents, or null for no limit.
        - `perMonth` integer, nullable — Monthly spending limit in cents, or null for no limit.
      - `walletId` string — Wallet (wal_*) the agent is granted access to. Defaults to the party's default wallet.

## Response `201`

Successful Response

- object
  - `data` object, required
    - `type` 'agent', required — Resource type. Always `agent`.
    - `id` string, required — Agent ID (agt_*).
    - `attributes` object, required
      - `name` string, required — Agent display name.
      - `description` string, nullable, required — Agent description.
      - `tags` object, required — Metadata visible to anyone who can read the resource.
      - `handle` string, nullable, required — Agent handle, such as @acme-support, or null when none is set.
      - `status` 'ACTIVE' | 'REVOKED', required — Agent status: ACTIVE, or REVOKED after deletion.
      - `limits` object, nullable, required — Spend caps for actions this agent initiates on its owner's party.
        - `perTransaction` integer, nullable — Per-transaction spending limit in cents, or null for no limit.
        - `perDay` integer, nullable — Daily spending limit in cents, or null for no limit.
        - `perMonth` integer, nullable — Monthly spending limit in cents, or null for no limit.
      - `createdAt` string, date-time, nullable, required — RFC 3339 timestamp when this agent was created, or null when unknown.
      - `createdBy` string, nullable, required — User who created this agent (usr_*).
      - `lastActiveAt` string, date-time, nullable, required — RFC 3339 timestamp when the agent last authenticated, or null when it never has.
    - `relationships` object, required
      - `party` object, required — Party that owns the agent.
        - `data` object, required — Related resource identifier.
          - `type` 'party', required — Resource type. Always `party`.
          - `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
- **2026-08-13** `ba1fb54c5939` — 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
- **2026-07-26** `270e233e401c` — 1 breaking, 2 warning, 1 info
  - the `data/attributes/name` request property's maxLength was decreased to `32`
  - for the `header` request parameter `Idempotency-Key`, the maxLength was set to `255`
  - the `data/attributes/description` request property's maxLength was set to `100`
  - added the new optional request property `data/attributes/slug`

[Change history](https://skmtc.dev/natural/apis/natural-api/changes/agents/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/ca3882d75a00?raw)