> ## Documentation Index
> Fetch the complete documentation index at: https://developers.argosidentity.com/llms.txt
> Use this file to discover all available pages before exploring further.
# Credit usage
> Check usage by period and browse transactions on Project Management → Credit Usage.
**Where:** sidebar **Project Management** → **Credit Usage** tab
See the credits this project has spent, broken down by period and listed per transaction. Your ARGOS contact sets the rates; you review the results here — [how credits are charged](/en/omni/dashboard/project/credit-pricing).
## Choosing a period
| Preset | Range |
| ------------ | --------------------------------- |
| Last 7 days | |
| Last 14 days | |
| Last 30 days | Default |
| Last 90 days | |
| Custom | Pick your own start and end dates |
Changing the period refreshes both the summary cards and the transactions.
## Summary cards
| Card | Contents |
| ----------- | ------------------------------------------------------------------------------------------------------------------ |
| Total | Total credits used in the selected period. The card title includes the period (for example "Last 30 days — Total") |
| Environment | The cost of keeping the environment running |
| Operation | The cost of API calls |
| Tools | The cost of external tool calls made during an analysis |
The three category cards have an ⓘ icon; hover it to see when that category is billed.
## When each category is billed
**When credits are deducted** differs by category. These three lines are the core of understanding your bill.
| Category | Billed | Exceptions |
| --------------- | -------------------------------------------- | ---------------------------------------------------------------------------------------------------------------- |
| **Environment** | Automatically at 00:00 UTC every day | Regardless of project status (service, trial, and closed alike). Deducted daily even if you never run a workflow |
| **Operation** | When an API response succeeds | Add Items (standard) is free |
| **Tools** | When a tool call during an analysis succeeds | Deducted only when `success: true`. Tools with no price are free |
Environment keeps billing for as long as the project exists. Delete test projects you are not using.
## Transactions
The table heading shows the count (`16`), and **Export CSV** downloads the current period. One analysis is recorded across several rows — the analysis run itself is one Operation row, and each engine it called is one Tools row.
| Column | Contents |
| ------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| TXID | Unique transaction ID |
| Category | Environment · Operation · Tools |
| Operation | What triggered the charge. Operation rows show an action name such as `run_analysis` or `create_profile`; Tools rows show the **engine code** that was called (`text-similarity`, `aml-search`, and so on) |
| BASE | The base rate for this operation |
| Quantity | Number of calls |
| Credits | Credits before adjustment |
| Discount | `—` when none applies |
| Final credits | Credits actually deducted |
| Resource | The target resource ID. For an analysis, the `analysis_` ID is shown as a link |
| Billed at | |
Long lists load in pages with **Load more**. With no history you see "No usage in this period", and when a filter matches nothing, "No transactions match your filters".
## Search and filters
* **Search by TXID or resource ID** — narrow to one transaction or one resource (a profile, an analysis, and so on).
* The **All categories** select box lets you view only Environment, Operation, or Tools.
## Related pages
* [How credits are charged](/en/omni/dashboard/project/credit-pricing) — which actions deduct credits
* [Project management](/en/omni/dashboard/project-management) — the other settings tabs