# FAQ

Frequently asked questions and troubleshooting for **Uanataca Timestamp** (TSA) end users and integrators. Short answers are given below; for more technical details, see [Developer documentation — Usage reference](/products/namirialpkiaas/timestamp/enterprise-documentation/developer-documentation/overview).

## What are billing credentials and where can I get them?

**Billing credentials** are the credentials used by the platform to meter and bill your usage of Timestamp (and other services such as One-Shot and SignBox). You use them as **HTTP Basic Auth** (username and password) when sending timestamp requests to the TSA endpoint.

To obtain billing credentials, contact your **commercial contact** or **Operations** directly.

## Is there an example of how to use the service?

Yes. The full workflow with **OpenSSL** and **curl** is documented in the [Usage reference](/products/namirialpkiaas/timestamp/enterprise-documentation/developer-documentation/api/usage-reference). It covers:

1. **Hash generation** — Create a timestamp query (`.tsq`) from your file with OpenSSL (e.g. SHA-256).
2. **Timestamp request** — Send the `.tsq` to the TSA endpoint with `Content-Type: application/timestamp-query` and your Billing credentials.
3. **Verification** — Inspect the timestamp response (`.tsr`) with OpenSSL.


All commands and parameters are in that page. For prerequisites and Billing authentication, see [Get started](/products/namirialpkiaas/timestamp/enterprise-documentation/get-started/get-started).

## What can I timestamp?

You can timestamp **any data** you can represent as a **hash**. The TSA does not receive the original content—only a **SHA-256** digest. So you can timestamp:

- **Files** — PDFs, documents, images, binaries (OpenSSL can hash the file and build the `.tsq`).
- **Any binary or data** — As long as you produce a SHA-256 hash and build a valid RFC-3161 timestamp query from it.


The timestamp proves that a given hash existed at a specific time; you keep the original data and the `.tsr` for proof. See [Usage reference](/products/namirialpkiaas/timestamp/enterprise-documentation/developer-documentation/api/usage-reference) for the exact workflow.

## Which endpoint should I use?

Use the following TSA endpoints with **HTTP POST**, `Content-Type: application/timestamp-query`, and **HTTP Basic Auth** (Billing username and password):

| Environment | Endpoint |
|  --- | --- |
| **Production** | `https://tsa.uanataca.com/tsa/tss03` |
| **Sandbox** | `https://tsa.sandbox.uanataca.com/tsa/tss03` |


For the full request format and examples, see [Usage reference](/products/namirialpkiaas/timestamp/enterprise-documentation/developer-documentation/api/usage-reference) and [Get started](/products/namirialpkiaas/timestamp/enterprise-documentation/get-started/get-started).

For more technical details, see [Developer documentation — Usage reference](/products/namirialpkiaas/timestamp/enterprise-documentation/developer-documentation/overview).