# POST /api/v1/invitations/{token}/accept

> Accept a pending invitation

- **Tag:** invitations
- **Operation ID:** `accept_invitation_api_v1_invitations__token__accept_post`

## Description

Process a pending invitation for the authenticated user. Adds the user to the firm (and grants business access for client invitations) then marks the invitation as accepted. Idempotent: returns success if already accepted.

## Authentication

Bearer token in `Authorization` header.
Required header: `x-business-id: <business uuid>`.

## Parameters

- `token` (path, string, required)

## Responses

### 201 — Successful Response

Schema: `AcceptInvitationResponse`

- `status` (string · required)
- `invitation_type` (string)
- `firm_name` (string)
- `role` (string)
- `message` (string)

### 400 — Bad Request - Invalid input

### 401 — Unauthorized - Authentication required

### 404 — Not Found - Resource does not exist

### 422 — Validation Error

Schema: `HTTPValidationError`

- `detail` (array · ValidationError) → `ValidationError`
  - `loc` (array · string | integer · required)
  - `msg` (string · required)
  - `type` (string · required)
  - `input` (object)
  - `ctx` (object)

## Code samples

### cURL

```bash
curl -X POST 'https://api.ondayzero.com/api/v1/invitations/{token}/accept' \
  -H 'Authorization: Bearer dz_your_token' \
  -H 'x-business-id: YOUR_BUSINESS_ID'
```

### JavaScript

```javascript
const response = await fetch('https://api.ondayzero.com/api/v1/invitations/{token}/accept', {
  method: 'POST',
  headers: {
    Authorization: 'Bearer dz_your_token',
    'x-business-id': 'YOUR_BUSINESS_ID',
  },
});
const data = await response.json();
```

### Python

```python
import httpx

headers = {
    "Authorization": "Bearer dz_your_token",
    "x-business-id": "YOUR_BUSINESS_ID",
}

response = httpx.post("https://api.ondayzero.com/api/v1/invitations/{token}/accept", headers=headers)
data = response.json()
```

## See also

- HTML version: https://www.ondayzero.com/docs/reference/invitations/accept-invitation
- OpenAPI slice: https://www.ondayzero.com/docs/reference/invitations/accept-invitation/openapi.json
- Other endpoints in **invitations**: https://www.ondayzero.com/docs/reference/invitations