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+# Environments
+
+## List environments
+
+Get all environments for a given project.
+
+```
+GET /projects/:id/environments
+```
+
+| Attribute | Type    | Required | Description           |
+| --------- | ------- | -------- | --------------------- |
+| `id`      | integer | yes      | The ID of the project |
+
+```bash
+curl -H "PRIVATE-TOKEN: 9koXpg98eAheJpvBs5tK" https://gitlab.example.com/api/v3/projects/1/environments
+```
+
+Example response:
+
+```json
+[
+  {
+    "id": 1,
+    "name": "Env1",
+    "external_url": "https://env1.example.gitlab.com"
+  }
+]
+```
+
+## Create a new environment
+
+Creates a new environment with the given name and external_url.
+
+It returns 201 if the environment was successfully created, 400 for wrong parameters.
+
+```
+POST /projects/:id/environment
+```
+
+| Attribute     | Type    | Required | Description                  |
+| ------------- | ------- | -------- | ---------------------------- |
+| `id`          | integer | yes      | The ID of the project        |
+| `name`        | string  | yes      | The name of the environment  |
+| `external_url` | string  | no     | Place to link to for this environment |
+
+```bash
+curl --data "name=deploy&external_url=https://deploy.example.gitlab.com" -H "PRIVATE-TOKEN: 9koXpg98eAheJpvBs5tK" "https://gitlab.example.com/api/v3/projects/1/environments"
+```
+
+Example response:
+
+```json
+{
+  "id": 1,
+  "name": "deploy",
+  "external_url": "https://deploy.example.gitlab.com"
+}
+```
+
+## Edit an existing environment
+
+Updates an existing environment's name and/or external_url.
+
+It returns 200 if the environment was successfully updated. In case of an error, a status code 400 is returned.
+
+```
+PUT /projects/:id/environments/:environments_id
+```
+
+| Attribute       | Type    | Required                          | Description                      |
+| --------------- | ------- | --------------------------------- | -------------------------------  |
+| `id`            | integer | yes                               | The ID of the project            |
+| `environment_id` | integer | yes | The ID of the environment  | The ID of the environment        |
+| `name`          | string  | no                                | The new name of the environment  |
+| `external_url`  | string  | no                                | The new external_url             |
+
+```bash
+curl -X PUT --data "name=staging&external_url=https://staging.example.gitlab.com" -H "PRIVATE-TOKEN: 9koXpg98eAheJpvBs5tK" "https://gitlab.example.com/api/v3/projects/1/environment/1"
+```
+
+Example response:
+
+```json
+{
+  "id": 1,
+  "name": "staging",
+  "external_url": "https://staging.example.gitlab.com"
+}
+```
+
+## Delete an environment
+
+It returns 200 if the environment was successfully deleted, and 404 if the environment does not exist.
+
+```
+DELETE /projects/:id/environments/:environment_id
+```
+
+| Attribute | Type    | Required | Description           |
+| --------- | ------- | -------- | --------------------- |
+| `id` | integer | yes | The ID of the project |
+| `environment_id` | integer | yes | The ID of the environment |
+
+```bash
+curl -X DELETE -H "PRIVATE-TOKEN: 9koXpg98eAheJpvBs5tK" "https://gitlab.example.com/api/v3/projects/1/environment/1"
+```
+
+Example response:
+
+```json
+{
+  "id": 1,
+  "name": "deploy",
+  "external_url": "https://deploy.example.gitlab.com"
+}
+```