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# Validate the `.gitlab-ci.yml` (API)

> [Introduced][ce-5953] in GitLab 8.12.

Checks if your `.gitlab-ci.yml` file is valid.

```
POST /ci/lint
```

| Attribute  | Type    | Required | Description |
| ---------- | ------- | -------- | -------- |
| `content`  | string    | yes      | the `.gitlab-ci.yaml` content|

```shell
curl --header "Content-Type: application/json" https://gitlab.example.com/api/v4/ci/lint --data '{"content": "{ \"image\": \"ruby:2.6\", \"services\": [\"postgres\"], \"before_script\": [\"bundle install\", \"bundle exec rake db:create\"], \"variables\": {\"DB_NAME\": \"postgres\"}, \"types\": [\"test\", \"deploy\", \"notify\"], \"rspec\": { \"script\": \"rake spec\", \"tags\": [\"ruby\", \"postgres\"], \"only\": [\"branches\"]}}"}'
```

Be sure to copy paste the exact contents of `.gitlab-ci.yml` as YAML is very picky about indentation and spaces.

Example responses:

- Valid content:

  ```json
  {
    "status": "valid",
    "errors": []
  }
  ```

- Invalid content:

  ```json
  {
    "status": "invalid",
    "errors": [
      "variables config should be a hash of key value pairs"
    ]
  }
  ```

- Without the content attribute:

  ```json
  {
    "error": "content is missing"
  }
  ```

[ce-5953]: https://gitlab.com/gitlab-org/gitlab-foss/-/merge_requests/5953