---
title: "Create Concurrency Limit"
method: POST
path: "/api/concurrency_limits/"
tags: ["Concurrency Limits"]
---

# Create Concurrency Limit

`POST /api/concurrency_limits/`

## Request

- The document declares no server URL.
- Auth: none declared

## Headers

- `x-prefect-api-version` string

## Request body

- ConcurrencyLimitCreate: Data used by the Prefect REST API to create a concurrency limit.
  - `tag` string, required: A tag the concurrency limit is applied to.
  - `concurrency_limit` integer, required: The concurrency limit.

## Response `200`

Successful Response

- ConcurrencyLimit: An ORM representation of a concurrency limit.
  - `id` string, uuid
  - `created` string, date-time
  - `updated` string, date-time
  - `tag` string, required: A tag the concurrency limit is applied to.
  - `concurrency_limit` integer, required: The concurrency limit.
  - `active_slots` string[]: A list of active run ids using a concurrency slot

## Other responses

- `422`: Validation Error

---

[API](https://skmtc.dev/prefecthq/apis/prefect-versions-api.md) - [All operations](https://skmtc.dev/prefecthq/apis/prefect-versions-api/llms.txt) - [OpenAPI document](https://skmtc.dev/prefecthq/apis/prefect-versions-api/revisions/a7958ce57e96?raw)