# Chinadrugtrials — Wrapped API

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>
> 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.

> Search and access detailed information on Chinese clinical trials, including trial phases, statuses, sponsors, dates, and locations to stay informed about ongoing medical research in China. Find specific trials by title or browse comprehensive trial details to track study progress and identify relevant research opportunities.

**Category:** Healthcare | **Website:** [chinadrugtrials.org.cn/](https://chinadrugtrials.org.cn/) | **Docs:** [parse.bot/marketplace/03eeffd6-cf63-4638-8196-8f2effac0ed3/chinadrugtrials-org-cn-api](https://parse.bot/marketplace/03eeffd6-cf63-4638-8196-8f2effac0ed3/chinadrugtrials-org-cn-api)

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

## Access

**Base URL:** `https://api.paywithlocus.com/api/wrapped/credits/chinadrugtrials/`
**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

### Get trial details

Retrieve comprehensive details for a single clinical trial by its internal UUID. Returns structured data including professional title, phase, sponsor, protocol ID, drug information, dates, indications, and participating institution locations. The trial_id is obtained from search_trials results.

**Estimated cost:** Metered

| Field | Type | Required | Description |
|-------|------|----------|-------------|
| `trial_id` | string | Yes | The UUID of the trial, obtained from search_trials results (e.g., 6071f06e13a8459d876c7e164684ceaa). |

```bash
curl -X POST https://api.paywithlocus.com/api/wrapped/credits/chinadrugtrials/get-trial-details \
  -H "Authorization: Bearer $LOCUS_CREDITS_SECRET_KEY" \
  -H "Idempotency-Key: $(uuidgen)" \
  -H "Content-Type: application/json" \
  -d '{"trial_id":"<string>"}'
```

### Search trials

Full-text search over Chinese clinical trials. Filters by keyword, drug name, sponsor, registration number, or status. Returns paginated trial summaries with registration number, status, drug, indications, and title. Each item exposes a trial_id suitable for fetching full details via get_trial_details.

**Estimated cost:** Metered

| Field | Type | Required | Description |
|-------|------|----------|-------------|
| `drug_name` | string | No | Name of the drug involved in the trial. |
| `page` | integer | No | Page number for pagination (1-based). |
| `query` | string | No | General keywords to search for (matched against trial titles and descriptions). |
| `reg_no` | string | No | Registration number of the trial (e.g., CTR20262272). |
| `sponsor` | string | No | Name of the applicant or sponsor organization. |
| `status` | string | No | Current status filter for the trial (e.g., 进行中, 已完成). |

```bash
curl -X POST https://api.paywithlocus.com/api/wrapped/credits/chinadrugtrials/search-trials \
  -H "Authorization: Bearer $LOCUS_CREDITS_SECRET_KEY" \
  -H "Idempotency-Key: $(uuidgen)" \
  -H "Content-Type: application/json" \
  -d '{"drug_name":"<string>","page":"<integer>","query":"<string>","reg_no":"<string>","sponsor":"<string>","status":"<string>"}'
```

## Next steps

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