---
title: "Connect a domain"
description: "Record a domain and return the two DNS records to create: a TXT and a CNAME."
canonical: "https://atelier201.com/docs/api/domains/add"
updated: "2026-11-06"
---

# Connect a domain

Requires `domains:write` and a workspace admin. Costs no credits. Paid plans only.

Nothing is routed until the TXT record is seen. Show the person the records exactly as returned, then [check the domain](/docs/api/domains/check). A subdomain such as `www.example.com` is the reliable choice. See [Domains](/docs/platform/domains).

A draft has no custom domain, and a Site has a limited number. A site over its limit is refused with a `409 conflict` that names it.

```http
POST https://api.atelier201.com/v1/sites/{site_id}/domains
```

## Authorizations

- `Authorization` (bearer, in header, required)

## Path parameters

- `site_id` (`string`, required): The site's id, or its slug (the address before .atelier201.page).

## Body

`application/json`, required

- `hostname` (`string`, required, length: `3–253 chars`): The full hostname, e.g. www.example.com. A subdomain is the reliable choice.

## Response

**201**: Connect a domain

- `data` (`object`, required)
- `data.id` (`string`, required)
- `data.hostname` (`string`, required)
- `data.kind` (`enum<string>`, required, one of: `platform, custom`)
- `data.state` (`enum<string>`, required, one of: `pending_ownership, provisioning, active, error, removing`)
- `data.canonical` (`boolean`, required)
- `data.certificate` (`string,null`, required)
- `data.error` (`string,null`, required)
- `data.dns_records` (`object[]`, required)
- `data.dns_records.type` (`string`, required)
- `data.dns_records.name` (`string`, required)
- `data.dns_records.value` (`string`, required)
- `data.dns_records.purpose` (`string`, required)
- `data.verified_at` (`string | null`, required)
- `data.created_at` (`string`, required): ISO 8601, UTC.
- `request_id` (`string`, required)

```json
{
  "data": {
    "id": "<string>",
    "hostname": "<string>",
    "kind": "platform",
    "state": "pending_ownership",
    "canonical": true,
    "certificate": null,
    "error": null,
    "dns_records": [
      {
        "type": "<string>",
        "name": "<string>",
        "value": "<string>",
        "purpose": "<string>"
      }
    ],
    "verified_at": "<string>",
    "created_at": "<string>"
  },
  "request_id": "<string>"
}
```

**400**: Possible codes: invalid_request, unknown_field, invalid_parameter, invalid_cursor

- `error` (`object`, required)
- `error.type` (`string`, required)
- `error.code` (`string`, required)
- `error.message` (`string`, required)
- `error.param` (`string`)
- `error.docs_url` (`string`, required)
- `error.action_url` (`string<uri>`)
- `error.details` (`Record<string, object>`)
- `request_id` (`string`, required)

```json
{
  "error": {
    "type": "<string>",
    "code": "<string>",
    "message": "<string>",
    "param": "<string>",
    "docs_url": "<string>",
    "action_url": "<string>",
    "details": {}
  },
  "request_id": "<string>"
}
```

**401**: Possible codes: authentication_required, invalid_api_key, api_key_expired, api_key_revoked

- `error` (`object`, required)
- `error.type` (`string`, required)
- `error.code` (`string`, required)
- `error.message` (`string`, required)
- `error.param` (`string`)
- `error.docs_url` (`string`, required)
- `error.action_url` (`string<uri>`)
- `error.details` (`Record<string, object>`)
- `request_id` (`string`, required)

```json
{
  "error": {
    "type": "<string>",
    "code": "<string>",
    "message": "<string>",
    "param": "<string>",
    "docs_url": "<string>",
    "action_url": "<string>",
    "details": {}
  },
  "request_id": "<string>"
}
```

**402**: Possible codes: insufficient_credits

- `error` (`object`, required)
- `error.type` (`string`, required)
- `error.code` (`string`, required)
- `error.message` (`string`, required)
- `error.param` (`string`)
- `error.docs_url` (`string`, required)
- `error.action_url` (`string<uri>`)
- `error.details` (`Record<string, object>`)
- `request_id` (`string`, required)

```json
{
  "error": {
    "type": "<string>",
    "code": "<string>",
    "message": "<string>",
    "param": "<string>",
    "docs_url": "<string>",
    "action_url": "<string>",
    "details": {}
  },
  "request_id": "<string>"
}
```

**403**: Possible codes: insufficient_scope, feature_not_available, admin_required

- `error` (`object`, required)
- `error.type` (`string`, required)
- `error.code` (`string`, required)
- `error.message` (`string`, required)
- `error.param` (`string`)
- `error.docs_url` (`string`, required)
- `error.action_url` (`string<uri>`)
- `error.details` (`Record<string, object>`)
- `request_id` (`string`, required)

```json
{
  "error": {
    "type": "<string>",
    "code": "<string>",
    "message": "<string>",
    "param": "<string>",
    "docs_url": "<string>",
    "action_url": "<string>",
    "details": {}
  },
  "request_id": "<string>"
}
```

**404**: Possible codes: resource_not_found

- `error` (`object`, required)
- `error.type` (`string`, required)
- `error.code` (`string`, required)
- `error.message` (`string`, required)
- `error.param` (`string`)
- `error.docs_url` (`string`, required)
- `error.action_url` (`string<uri>`)
- `error.details` (`Record<string, object>`)
- `request_id` (`string`, required)

```json
{
  "error": {
    "type": "<string>",
    "code": "<string>",
    "message": "<string>",
    "param": "<string>",
    "docs_url": "<string>",
    "action_url": "<string>",
    "details": {}
  },
  "request_id": "<string>"
}
```

**409**: Possible codes: conflict, result_not_ready, idempotency_key_reused

- `error` (`object`, required)
- `error.type` (`string`, required)
- `error.code` (`string`, required)
- `error.message` (`string`, required)
- `error.param` (`string`)
- `error.docs_url` (`string`, required)
- `error.action_url` (`string<uri>`)
- `error.details` (`Record<string, object>`)
- `request_id` (`string`, required)

```json
{
  "error": {
    "type": "<string>",
    "code": "<string>",
    "message": "<string>",
    "param": "<string>",
    "docs_url": "<string>",
    "action_url": "<string>",
    "details": {}
  },
  "request_id": "<string>"
}
```

**410**: Possible codes: result_expired

- `error` (`object`, required)
- `error.type` (`string`, required)
- `error.code` (`string`, required)
- `error.message` (`string`, required)
- `error.param` (`string`)
- `error.docs_url` (`string`, required)
- `error.action_url` (`string<uri>`)
- `error.details` (`Record<string, object>`)
- `request_id` (`string`, required)

```json
{
  "error": {
    "type": "<string>",
    "code": "<string>",
    "message": "<string>",
    "param": "<string>",
    "docs_url": "<string>",
    "action_url": "<string>",
    "details": {}
  },
  "request_id": "<string>"
}
```

**413**: Possible codes: request_too_large

- `error` (`object`, required)
- `error.type` (`string`, required)
- `error.code` (`string`, required)
- `error.message` (`string`, required)
- `error.param` (`string`)
- `error.docs_url` (`string`, required)
- `error.action_url` (`string<uri>`)
- `error.details` (`Record<string, object>`)
- `request_id` (`string`, required)

```json
{
  "error": {
    "type": "<string>",
    "code": "<string>",
    "message": "<string>",
    "param": "<string>",
    "docs_url": "<string>",
    "action_url": "<string>",
    "details": {}
  },
  "request_id": "<string>"
}
```

**422**: Possible codes: request_too_large_for_plan

- `error` (`object`, required)
- `error.type` (`string`, required)
- `error.code` (`string`, required)
- `error.message` (`string`, required)
- `error.param` (`string`)
- `error.docs_url` (`string`, required)
- `error.action_url` (`string<uri>`)
- `error.details` (`Record<string, object>`)
- `request_id` (`string`, required)

```json
{
  "error": {
    "type": "<string>",
    "code": "<string>",
    "message": "<string>",
    "param": "<string>",
    "docs_url": "<string>",
    "action_url": "<string>",
    "details": {}
  },
  "request_id": "<string>"
}
```

**429**: Possible codes: rate_limited

- `error` (`object`, required)
- `error.type` (`string`, required)
- `error.code` (`string`, required)
- `error.message` (`string`, required)
- `error.param` (`string`)
- `error.docs_url` (`string`, required)
- `error.action_url` (`string<uri>`)
- `error.details` (`Record<string, object>`)
- `request_id` (`string`, required)

```json
{
  "error": {
    "type": "<string>",
    "code": "<string>",
    "message": "<string>",
    "param": "<string>",
    "docs_url": "<string>",
    "action_url": "<string>",
    "details": {}
  },
  "request_id": "<string>"
}
```

**500**: Possible codes: internal_error

- `error` (`object`, required)
- `error.type` (`string`, required)
- `error.code` (`string`, required)
- `error.message` (`string`, required)
- `error.param` (`string`)
- `error.docs_url` (`string`, required)
- `error.action_url` (`string<uri>`)
- `error.details` (`Record<string, object>`)
- `request_id` (`string`, required)

```json
{
  "error": {
    "type": "<string>",
    "code": "<string>",
    "message": "<string>",
    "param": "<string>",
    "docs_url": "<string>",
    "action_url": "<string>",
    "details": {}
  },
  "request_id": "<string>"
}
```

**503**: Possible codes: service_unavailable

- `error` (`object`, required)
- `error.type` (`string`, required)
- `error.code` (`string`, required)
- `error.message` (`string`, required)
- `error.param` (`string`)
- `error.docs_url` (`string`, required)
- `error.action_url` (`string<uri>`)
- `error.details` (`Record<string, object>`)
- `request_id` (`string`, required)

```json
{
  "error": {
    "type": "<string>",
    "code": "<string>",
    "message": "<string>",
    "param": "<string>",
    "docs_url": "<string>",
    "action_url": "<string>",
    "details": {}
  },
  "request_id": "<string>"
}
```

**Example request**

```bash
curl --request POST \
  --url 'https://api.atelier201.com/v1/sites/<site_id>/domains' \
  --header 'Authorization: <api-key>' \
  --header 'Content-Type: application/json' \
  --data '{
  "hostname": "<string>"
}'
```