---
title: "Monitoring timestamping - Rest PKI Core"
description: "How to monitor timestamp issuance in Rest PKI Core from Sys Admin: tiers, the requests received and their details."
canonical: "https://docs.lacunasoftware.com/en-us/articles/rest-pki/core/operation/monitor-timestamping"
locale: "en"
product: "Rest PKI Core"
last_updated: "2026-10-12"
---

# Monitoring timestamping - Rest PKI Core

To monitor timestamp issuance on your [Rest PKI Core](https://docs.lacunasoftware.com/en-us/articles/rest-pki/core) instance, follow the steps below:

1. Sign in to the management interface of your instance (e.g. *https://restpkicore.yourcompany.com*)
1. Click your name on the top right corner, then **Sys Admin**
1. On the left menu, click **Timestamping**
1. Click one of the timestamping **Tiers**
1. On the tier details page, the **Timestamp requests** section shows the requests received for that tier, which you can filter by start
   and/or end date
1. To see more information about a specific request, click its **Show details** link
1. The dialog that opens lets you get:
   * The request (*timestamp query*) in binary format, as defined in RFC 3161
   * The response (*timestamp reply*) in binary format, as defined in RFC 3161
   * The timestamp issued
   * The certificate of the authority that issued the timestamp
   * Which providers were used to provide the timestamp, and details on each provider's response, such as the response time and the return
     code

You can also get the TSP protocol messages, requests (*timestamp queries*) and responses (*timestamp replies*), directly from the system's
blob storage:

![Timestamp messages](https://docs.lacunasoftware.com/images/rest-pki/core/timestamp-messages.png)

To make lookups easier, the messages are grouped in folders by year, month and day, so that you can, for instance, easily get all the
messages of a given month straight from the storage. Each request has two files, as detailed below:

```text
tspmessages/2024/03/05/104710551-018c3515315743f8b3db6ebd9bcaa8c3.tsq
            ─────┰──── ────┰────                                  ─┰─
                 │         │                                       └──── timestamp query (request)
                 │         └──────────────────────────────────────────── time (10:47:10.551)
                 └────────────────────────────────────────────────────── date (2024-03-05)

tspmessages/2024/03/05/104710551-018c3515315743f8b3db6ebd9bcaa8c3.tsr
            ─────┰──── ────┰────                                  ─┰─
                 │         │                                       └──── timestamp reply (response)
                 │         └──────────────────────────────────────────── time (10:47:10.551)
                 └────────────────────────────────────────────────────── date (2024-03-05)
```

> **Note**
>
> The dates and times in the names of the TSP protocol message files are in the system's default time zone (setting `General:DefaultTimeZone`).

## See also

* [Operation guide](https://docs.lacunasoftware.com/en-us/articles/rest-pki/core/operation)