---
layout: "api"
page_title: "API Documentation"
sidebar_current: "docs-enterprise-api"
description: |-
  Terraform Enterprise provides an API for a **subset of features**.
---

# Terraform Enterprise API Documentation

Terraform Enterprise provides an API for a **subset of features** available. For questions
or requests for new API features please email [support@hashicorp.com](mailto:support@hashicorp.com).

## Available Endpoints Terraform Enterprise

- [Environments](/docs/enterprise/api/environments.html)
- [Runs](/docs/enterprise/api/runs.html)
- [States](/docs/enterprise/api/states.html)

## Authentication

All requests must be authenticated with an `X-Atlas-Token` HTTP header. This 
token can be generated or revoked on the [account tokens page](/settings/tokens). 
Your token will have access to all resources your account has access to.

For organization level resources, we recommend creating a separate user account
that can be added to the organization with the specific privilege level
required.

## Response Codes

Standard HTTP response codes are returned. `404 Not Found`
codes are returned for all resources that a user does not have access to,
as well as for resources that don't exist. This is done to avoid a
potential attacker discovering the existence of a resource.

## Errors

Errors are returned in JSON format:

    {
      "errors": {
        "name": [
          "has already been taken"
        ]
      }
    }

## Versioning

The API currently resides under the `/v1` prefix. Future APIs
will increment this version leaving the `/v1` API intact, though
in the future certain features may be deprecated. In that case,
ample notice to migrate to the new API will be provided.

## Content Type

The API accepts namespaced attributes in either
JSON or `application/x-www-form-urlencoded`. We recommend
using JSON, but for simplicity form style requests are supported.

Below is an equivalent example with both styles using `curl`.

### JSON Request Example

    $ cat variables.json
    {
      "variables": {
          "desired_capacity": "15",
          "foo": "bar"
      }
    }
    $ curl %{ATLAS_URL}/api/v1/environments/%{DEFAULT_USERNAME}/test/variables \
        -X PUT \
        -H 'Content-Type: application/json' \
        -d @variables.json \
        -H "X-Atlas-Token: $ATLAS_TOKEN"

### Form URL Encoded Example

    $ curl %{ATLAS_URL}/api/v1/environments/%{DEFAULT_USERNAME}/test/variables \
        -X PUT \
        -d variables[foo]='bar' \
        -d variables[desired_capacity]='15' \
        -H "X-Atlas-Token: $ATLAS_TOKEN"