---
title: "Create an Environment"
method: POST
path: "/v1/environments"
tags: ["Environments"]
---

# Create an Environment

`POST /v1/environments`

## Request

- Base URL: `https://api.steel.dev`
- URL: `https://api.steel.dev/v1/environments`
- Auth: one of:
  - API key in header `steel-api-key`
  - none

## Request body

- EnvironmentCreate
  - `name` string, required
  - `networkSecrets` object[]
    - `domain` string, required
    - `header` string, required
    - `port` integer
    - `secret` union, required
      - object
        - `secretId` string, uuid, required
      - object
        - `value` string, required
    - `template` string, required
  - `projectId` string, uuid
  - `secrets` object
  - `spec` object
    - `autoPause` boolean
    - `diskMib` integer
    - `env` object
    - `memoryMib` integer
    - `name` string
    - `networkPolicy` object
      - `cidrs` object
        - `allow` string[]
        - `deny` string[]
      - `domains` object
        - `allow` string[]
        - `deny` string[]
      - `internetAccess` boolean
    - `template` string
    - `timeoutSeconds` integer
    - `vcpu` integer

## Response `201`

Default Response

- EnvironmentResource
  - `createdAt` string, date-time, required
  - `id` string, uuid, required
  - `name` string, required
  - `networkSecrets` object[], required
    - `domain` string, required
    - `header` string, required
    - `port` integer
    - `secretId` string, uuid, required
    - `template` string, required
  - `secrets` object, required
  - `spec` object, required
    - `autoPause` boolean
    - `diskMib` integer
    - `env` object
    - `memoryMib` integer
    - `name` string
    - `networkPolicy` object
      - `cidrs` object
        - `allow` string[]
        - `deny` string[]
      - `domains` object
        - `allow` string[]
        - `deny` string[]
      - `internetAccess` boolean
    - `template` string
    - `timeoutSeconds` integer
    - `vcpu` integer
  - `updatedAt` string, date-time, required
  - `version` integer, required

## Other responses

- `400`: An error response from the API
- `409`: An error response from the API

## Changes

- **2026-10-16** `8f7e74e04bd3`: 1 info
  - endpoint added

[Operation history](https://skmtc.dev/steel-dev/apis/steel-api/changes/v1/environments/post.md)

---

[API](https://skmtc.dev/steel-dev/apis/steel-api.md) - [All operations](https://skmtc.dev/steel-dev/apis/steel-api/llms.txt) - [OpenAPI document](https://skmtc.dev/steel-dev/apis/steel-api/revisions/8f7e74e04bd3?raw)