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

# Create Concurrency Limit

`POST /api/concurrency_limits/`

## 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.net/prefecthq/apis/untitled-api-2.md) · [All operations](https://skmtc.net/prefecthq/apis/untitled-api-2/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/prefecthq/untitled-api-2/revisions/29ba6c4f8837/schema)