# Open Trivia DB on Onekey

> 2 endpoints for Open Trivia DB (2 stable, 0 beta), 5 credits each. Category: Fun & utilities. One key, one JSON shape.

Base URL: https://api.onekey.dev
Auth: header `x-api-key: <key>`. Call shape: `GET /v1/{platform}/{endpoint}?{params}`.
Every response is `{success, data, metadata, error}`; check `success` first. Cost is in `metadata.credits_charged`. Free when served from cache (0.2 credit for a cached response over 100 KB). Failed and not-found calls are refunded.
Status: stable = verified against the live source; beta = not yet verified, fields may be missing.

Page: https://onekey.dev/platforms/opentdb
Reference (Markdown): https://onekey.dev/docs/api/opentdb.md
All docs: https://onekey.dev/llms.txt

## Canonical fields returned

Unified-schema fields (same names on every platform), with how many of the 2 mapped Open Trivia DB endpoints return each:

- `content.text` (string): 1
- `entity.category` (string): 1
- `entity.id` (string): 1
- `entity.name` (string): 1
- `entity.type` (string): 1
- plus 2 platform-specific fields under `ext.`

## Endpoints

### opentdb.categories

Open Trivia DB categories.
- Price: 5 credits per fresh call. Status: stable. Returns: a list.
- Request: `GET https://api.onekey.dev/v1/opentdb/categories` with header `x-api-key: YOUR_API_KEY`
- Parameters: none
- Fields returned: `entity.id`, `entity.name`
- Reference: https://onekey.dev/docs/api/opentdb/categories.md

### opentdb.questions

Trivia questions (Open Trivia DB; limited to 1 call per 5 s per IP).
- Price: 5 credits per fresh call. Status: stable. Returns: a list.
- Request: `GET https://api.onekey.dev/v1/opentdb/questions?amount=5` with header `x-api-key: YOUR_API_KEY`
- Parameters:
  - `amount` (string, optional, default 5): Number of questions (1-10)
- Fields returned: `content.text`, `entity.category`, `entity.type`, `ext.difficulty`, `ext.answer`
- Reference: https://onekey.dev/docs/api/opentdb/questions.md

## Sample request

```bash
curl "https://api.onekey.dev/v1/opentdb/categories" \
  -H "x-api-key: YOUR_API_KEY"
```