---
title: "Check subdomain availability"
method: POST
path: "/api/v1/projects/domains/check"
tags: ["Domains"]
---

# Check subdomain availability

`POST /api/v1/projects/domains/check`

Check if a subdomain is available for use.

## Request body

- CheckSubdomainAvailabilityRequest — Request to check if a subdomain is available. Attributes: subdomain: The subdomain to check (e.g., 'my-app' for my-app.apps.rebolt.ai).
  - `subdomain` string, required

## Response `200`

Successful Response

- SubdomainAvailabilityResponse — Response indicating whether a subdomain is available. Attributes: available: Whether the subdomain is available. subdomain: The subdomain that was checked. full_domain: The full domain that would be created (e.g., my-app.apps.rebolt.ai).
  - `available` boolean, required
  - `subdomain` string, required
  - `full_domain` string, required

## Other responses

- `422` — Validation Error

---

[API](https://skmtc.dev/rebolt/apis/fastapi.md) · [All operations](https://skmtc.dev/rebolt/apis/fastapi/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/rebolt/fastapi/revisions/ee5884f323f3/schema)