# Linux — Wrapped API

> **You are on:** `https://api.beta.paywithlocus.com/api` | [llms.txt](https://beta.paywithlocus.com/llms.txt) | [docs](https://docs.paywithlocus.com)
>
> Locus runs on multiple environments -- make sure every URL you call matches your expected environment.
> | Environment | Landing | API | Docs |
> |---|---|---|---|
> | Production | paywithlocus.com | api.paywithlocus.com | docs.paywithlocus.com |
> | Beta | beta.paywithlocus.com | api.beta.paywithlocus.com | docs.paywithlocus.com |
> | Stage | stage.paywithlocus.com | api.stage.paywithlocus.com | docs.paywithlocus.com |
>
> If the API URL above doesn't match your expected environment, re-fetch this file from the correct domain.

> Browse the latest discussions from the Linux Do community forum by checking recent topics, trending posts, or active conversations, with the ability to filter by specific categories. Discover what the community is talking about right now across different areas of interest.

**Category:** Developer Tools | **Website:** [linux.do/](https://linux.do/) | **Docs:** [parse.bot/marketplace/a80b6e31-0245-46ed-aa18-628f31a46033/linux-do-api](https://parse.bot/marketplace/a80b6e31-0245-46ed-aa18-628f31a46033/linux-do-api)

Pay-per-use API proxy for Locus Pro. Each call burns credits from your workspace balance.

## Access

**Base URL:** `https://api.beta.paywithlocus.com/api/wrapped/credits/linux/`
**Auth:** `Authorization: Bearer <LOCUS_CREDITS_SECRET_KEY>` (an `lcr_` secret key or a scoped `lcac_` agent credential)
**Required header:** `Idempotency-Key: <fresh UUID per call>`. A retry with the same key replays the stored result without a new charge.
**Response:** the provider response after any endpoint-specific normalization. `X-Locus-Credits-Charged` carries the charge and `X-Locus-Credits-Balance` the remaining balance. Insufficient credits return `402` before the provider is called.
**Pricing:** estimated costs below are USD. Locus debits the credit equivalent at your workspace rate.

Full call contract: https://docs.paywithlocus.com/api-reference/introduction

> Using a Pay With Locus wallet key (`claw_` prefix)? Wallet routes are documented separately: https://docs.paywithlocus.com/wrapped-apis/for-agents

## Endpoints

### List topics

List community topics sorted by the chosen order. Returns up to 30 topics per page (50 for top/daily). Supports pagination via the page parameter (0-indexed). Each topic includes metadata such as title, view count, reply count, like count, tags, author, and timestamps. When category_id is provided, results are scoped to that category; category_id values appear in every topic record's category_id field.

**Estimated cost:** Metered

| Field | Type | Required | Description |
|-------|------|----------|-------------|
| `category_id` | string | No | Numeric category ID to filter topics. Obtained from the category_id field in topic records (e.g. 4 for 开发调优, 14 for 资源荟萃). |
| `order` | string | No | Topic listing order. |
| `page` | integer | No | 0-indexed page number for pagination. |

```bash
curl -X POST https://api.beta.paywithlocus.com/api/wrapped/credits/linux/list-topics \
  -H "Authorization: Bearer $LOCUS_CREDITS_SECRET_KEY" \
  -H "Idempotency-Key: $(uuidgen)" \
  -H "Content-Type: application/json" \
  -d '{"category_id":"<string>","order":"<string>","page":"<integer>"}'
```

## Next steps

- [All wrapped API providers](https://beta.paywithlocus.com/wapi/index.md): pick another provider.
- [Find and call tools](https://beta.paywithlocus.com/agent/tools.md): price ceilings, async results, and errors.
- [Credits and billing](https://beta.paywithlocus.com/agent/billing.md): what a call costs and how to add credits.
- [Agent docs index](https://beta.paywithlocus.com/agent/index.md): every Locus agent page.