# Metaculus on Onekey

> 3 endpoints for Metaculus (0 stable, 3 beta), 1 to 5 credits each. Category: Finance & markets. 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/metaculus
Reference (Markdown): https://onekey.dev/docs/api/metaculus.md
All docs: https://onekey.dev/llms.txt

## Canonical fields returned

Unified-schema fields (same names on every platform), with how many of the 3 mapped Metaculus endpoints return each:

- `engagement.comments` (integer): 3
- `entity.category` (string): 3
- `entity.createdAt` (ISO 8601 date): 3
- `entity.date` (ISO 8601 date): 3
- `entity.id` (string): 3
- `entity.name` (string): 3
- `entity.slug` (string): 3
- `market.probability` (number): 3
- plus 3 platform-specific fields under `ext.`

## Endpoints

### metaculus.post

One Metaculus question (post) by id.
- Price: 1 credit per fresh call. Status: beta. Returns: one record.
- Request: `GET https://api.onekey.dev/v1/metaculus/post?id=3479` with header `x-api-key: YOUR_API_KEY`
- Parameters:
  - `id` (string, required): Post id
- Fields returned: `entity.id`, `entity.name`, `entity.slug`, `entity.category`, `entity.createdAt`, `entity.date`, `engagement.comments`, `market.probability`, `ext.forecasters`, `ext.forecasts`, `ext.questionType`
- Reference: https://onekey.dev/docs/api/metaculus/post.md

### metaculus.posts

Hot Metaculus forecasting questions.
- Price: 5 credits per fresh call. Status: beta. Returns: a list.
- Request: `GET https://api.onekey.dev/v1/metaculus/posts?limit=5` with header `x-api-key: YOUR_API_KEY`
- Parameters:
  - `limit` (string, optional, default 20): Rows (1-50)
- Fields returned: `entity.id`, `entity.name`, `entity.slug`, `entity.category`, `entity.createdAt`, `entity.date`, `engagement.comments`, `market.probability`, `ext.forecasters`, `ext.forecasts`, `ext.questionType`
- Reference: https://onekey.dev/docs/api/metaculus/posts.md

### metaculus.search

Search Metaculus questions.
- Price: 5 credits per fresh call. Status: beta. Returns: a list.
- Request: `GET https://api.onekey.dev/v1/metaculus/search?q=recession&limit=5` with header `x-api-key: YOUR_API_KEY`
- Parameters:
  - `q` (string, required): Search text
  - `limit` (string, optional, default 20): Rows (1-50)
- Fields returned: `entity.id`, `entity.name`, `entity.slug`, `entity.category`, `entity.createdAt`, `entity.date`, `engagement.comments`, `market.probability`, `ext.forecasters`, `ext.forecasts`, `ext.questionType`
- Reference: https://onekey.dev/docs/api/metaculus/search.md

## Sample request

```bash
curl "https://api.onekey.dev/v1/metaculus/post?id=3479" \
  -H "x-api-key: YOUR_API_KEY"
```