---
title: "Buy non-expiring packs of 100 timestamps"
method: POST
path: "/api/v1/firme/timestamps/checkout"
tags: ["Signatures (app routes)"]
---

# Buy non-expiring packs of 100 timestamps

`POST /api/v1/firme/timestamps/checkout`

## Request

- Base URL: `https://api.custodo.ai`
- URL: `https://api.custodo.ai/api/v1/firme/timestamps/checkout`
- Auth: HTTP bearer

Requires tenant:manage. Returns a Stripe payment checkout URL. Each pack costs EUR20 once; packs 1–100. requestKey is a UUID reused for retry. Credits are granted only after a verified successful payment webhook, exactly once per payment.

## Headers

- `X-Tenant-Id` string, uuid

## Request body

- object
  - `packs` integer, required
  - `requestKey` string, uuid, required

## Response `201`

Checkout URL and sessionId.

- object
  - `ok` true, required
  - `data` FirmeTimestampCheckout, required
    - `url` string, required
    - `sessionId` string, required

## Other responses

- `400`: The request did not validate: `error.details` names the fields.
- `401`: No API key, or one that is malformed, unknown, revoked or expired.
- `403`: The module is off for this organisation, the credential lacks the permission, or the tier does not cover it.
- `429`: The API key has spent its minute, or its day. See `Retry-After`.

---

[API](https://skmtc.dev/custodo/apis/custodo-integrazioni.md) · [All operations](https://skmtc.dev/custodo/apis/custodo-integrazioni/llms.txt) · [OpenAPI document](https://skmtc.dev/custodo/apis/custodo-integrazioni/revisions/16d336d3ec2a?raw)