---
title: "Changes to Creates an actor and waits until its record exists. Fails if a live actor with the same name and key exists."
method: POST
path: "/actors"
---

# Changes to Creates an actor and waits until its record exists. Fails if a live actor with the same name and key exists.

`POST /actors`

> Every recorded change to this operation, newest first.

## Timeline

Changed in 6 of 95 revisions.

- **2026-10-31** `aa8d1a8a5d14`: 6 breaking, 7 warning, 22 info
- **2026-09-04** `b4575371d0d8`: 1 info
- **2026-01-17** `590372b4ac5d`: 2 breaking, 1 info
- **2026-01-15** `412afac39940`: 1 breaking, 1 info
- **2026-01-06** `8146a8893350`: 1 info
- **2025-11-05** `3782866fef0e`: 1 info

## Changes

- **2026-10-31** `aa8d1a8a5d14`: 6 breaking, 7 warning, 22 info
  - added the pattern `^[a-z0-9]([a-z0-9-]{0,61}[a-z0-9])?$` to the `query` request parameter `namespace`
  - the `name` request property's minLength was increased from `0` to `1`
  - removed the required property `actor/crash_policy` from the response with the `200` status
  - removed the required property `actor/datacenter` from the response with the `200` status
  - removed the required property `actor/namespace_id` from the response with the `200` status
  - removed the required property `actor/runner_name_selector` from the response with the `200` status
  - for the `query` request parameter `namespace`, the maxLength was set to `63`
  - the `key` request property's maxLength was set to `1024`
  - the `name` request property's maxLength was set to `64`
  - removed the request property `crash_policy`
  - removed the request property `datacenter`
  - removed the request property `runner_name_selector`
  - removed the optional property `actor/error` from the response with the `200` status
  - the endpoint scheme security `rivet_token_header` was added to the API
  - added the new optional request property `pool`
  - the `query` request parameter `namespace` became optional
  - added the non-success response with the status `400`
  - added the non-success response with the status `401`
  - added the non-success response with the status `403`
  - added the non-success response with the status `404`
  - added the non-success response with the status `409`
  - added the non-success response with the status `415`
  - added the non-success response with the status `422`
  - added the non-success response with the status `500`
  - added the non-success response with the status `503`
  - the response property `actor/connectable_ts` became required for the status `200`
  - the response property `actor/destroy_ts` became required for the status `200`
  - the response property `actor/key` became required for the status `200`
  - the response property `actor/pending_allocation_ts` became required for the status `200`
  - the response property `actor/reschedule_ts` became required for the status `200`
  - the response property `actor/sleep_ts` became required for the status `200`
  - the response property `actor/start_ts` became required for the status `200`
  - added the required property `actor/namespace` to the response with the `200` status
  - added the required property `actor/pool` to the response with the `200` status
  - added the required property `created` to the response with the `200` status
- **2026-09-04** `b4575371d0d8`: 1 info
  - the endpoint scheme security `bearer_auth` was added to the API
- **2026-01-17** `590372b4ac5d`: 2 breaking, 1 info
  - the response property `actor/error` became nullable for the status `200`
  - the `actor/error` response's property type changed from no type to `object, null` for status `200`
  - removed `#/components/schemas/ActorError, subschema #1` from the `actor/error` response property `oneOf` list for the response status `200`
- **2026-01-15** `412afac39940`: 1 breaking, 1 info
  - added `subschema #4` to the `actor/error/oneOf[#/components/schemas/ActorError]/oneOf[subschema #1]/runner_pool_error` response property `oneOf` list for the response status `200`
  - removed `subschema #4, subschema #5` from the `actor/error/oneOf[#/components/schemas/ActorError]/oneOf[subschema #1]/runner_pool_error` response property `oneOf` list for the response status `200`
- **2026-01-06** `8146a8893350`: 1 info
  - added the optional property `actor/error` to the response with the `200` status
- **2025-11-05** `3782866fef0e`: 1 info
  - added the optional property `actor/reschedule_ts` to the response with the `200` status

---

[Operation](https://skmtc.dev/rivet-dev/apis/rivet-api-public/docs/actors/post.md) - [API](https://skmtc.dev/rivet-dev/apis/rivet-api-public.md) - [Page](https://skmtc.dev/rivet-dev/apis/rivet-api-public/changes/actors/post)