# Resend an invitation

`POST /v1/invitations/{invitation_id}:resend` · permission `invitations:write`

Resends a pending invitation with a new token: the previous link stops working. For an `email` invitation the new link goes only by e-mail and the response has no `accept_url`. For a `link_only` invitation the accept link (`accept_url`) is returned only in this response, once; no endpoint returns it later. The response carries `Cache-Control: no-store`, and a response replayed for the same `Idempotency-Key` omits the link and carries `secret_redacted: true`. Resends need at least 10 minutes between them and at most 5 sends in total; `expires_at` does not move. The write is audited as `invitation.resent`.

## Request

| Field | Type | Required | Description |
|---|---|---|---|
| `invitation_id` | path | yes | Invitation ID (`inv_…`). |

No request body.

## Response

`200 OK` with the invitation and its new accept link.

```json
{
  "id": "inv_01j9xt9v3w4y8z0a2b4c6d8e0g",
  "organization_id": "org_01j9xk3m7q8r2s4t6v8w0y2z4a",
  "email": "ada@example.com",
  "role_ids": [
    "rol_01j9xr7s1t2w6x8y0z2a4b6c8e"
  ],
  "application_id": null,
  "delivery": "link_only",
  "delivery_status": "not_sent",
  "status": "pending",
  "send_count": 2,
  "last_sent_at": "2026-10-12T09:31:00.123456Z",
  "expires_at": "2026-10-19T09:31:00.123456Z",
  "accepted_user_id": null,
  "accepted_at": null,
  "revoked_at": null,
  "created_at": "2026-10-12T09:31:00.123456Z",
  "updated_at": "2026-10-12T09:31:00.123456Z",
  "version": 1,
  "accept_url": "https://acme.eu.keenauth.app/u/login?invitation=<token>"
}
```

## Errors

| HTTP | code | When |
|---|---|---|
| 404 | `not_found` | The invitation does not exist in this environment. |
| 409 | `conflict` | The invitation is not pending. |
| 429 | `invite_rate_limited` | Less than 10 minutes since the last send, or 5 sends already. |
| 501 | `not_implemented` | The invitation uses `email` delivery and invitation e-mail is not configured for the deployment. |
| 401 | `unauthenticated` | The credential is missing, invalid or revoked. |
| 403 | `insufficient_permissions` | The credential lacks the required permission. |
| 429 | `rate_limited` | The rate limit was exceeded; retry after the `Retry-After` period. |
| 503 | `service_unavailable` | A dependency is temporarily unavailable; retry after the `Retry-After` period. |

## Example

```bash
curl -i -X POST "https://api.eu.keenauth.com/v1/invitations/inv_01j9xt9v3w4y8z0a2b4c6d8e0g:resend" \
  -H "Authorization: Bearer $KEENAUTH_SECRET_KEY"
```

## Personal data

This endpoint carries personal data: organization memberships and invitations. [Personal data in the KeenAuth APIs](/docs/policies/personal-data) describes what is stored, how long it is kept and how it is deleted. Do not send special categories of personal data (health, biometric data, religion, political opinions, sexual orientation) in any field.