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Metaculus API Documentation

Use Crawlora's Metaculus API endpoints to extract supported public Metaculus data as structured JSON. This documentation covers 11 active endpoints including Metaculus category questions, Metaculus comments feed, Metaculus project questions, Metaculus question detail, and related APIs. Developers can use these endpoints for monitoring, enrichment, research dashboards, internal data pipelines, and agent-native workflows without maintaining platform-specific scraping code. Each endpoint page documents authentication, request parameters such as slug, id, cURL examples, response examples, response schemas, errors, credit cost, and Playground testing. Send requests to the Crawlora API with an x-api-key header, review usage and plan limits on pricing, and test safe sample requests in Playground before moving the workflow into production.

Try Metaculus questions Start with endpoint docs Pricing

Quick start

Choose an endpoint, send an authenticated request with the x-api-key header, and inspect the normalized JSON response. The examples below use the public Crawlora API base URL and the same endpoint catalog used by Playground.

Base URL: https://api.crawlora.net/api/v1
Auth header: x-api-key: $CRAWLORA_API_KEY
Primary endpoint: GET /metaculus/questions
Credit cost: 2 credits/request

curl -X GET "https://api.crawlora.net/api/v1/metaculus/questions?limit=10" \
  -H "x-api-key: $CRAWLORA_API_KEY"

Try Metaculus questions in Playground API key authentication Review Crawlora pricing

Metaculus API endpoints

These endpoint cards are generated from the active Crawlora endpoint catalog, including method, path, auth mode, credit cost, parameter summary, docs, and Playground links.

GET/metaculus/category/{slug}/questionsapiKey2 credits/request

Metaculus category questions

Returns normalized Metaculus question rows from a credential-free public category feed page. Allowed category slugs: artificial-intelligence, computing-and-math, cryptocurrencies, economy-business, elections, environment-climate, geopolitics, health-pandemics, law, metaculus, natural-sciences, nuclear, politics, social-sciences, space, sports-entertainment, technology.

Required params: slug:path

Metaculus category questions documentation Try Metaculus category questions in Playground

GET/metaculus/comments-feedapiKey2 credits/request

Metaculus comments feed

Returns normalized Metaculus question rows for the questions referenced by the most recent public comments, in comment recency order. Derived from credential-free public Metaculus data; upstream comment bodies are not exposed.

Required params: None

Metaculus comments feed documentation Try Metaculus comments feed in Playground

GET/metaculus/project/{slug}/questionsapiKey2 credits/request

Metaculus project questions

Returns normalized Metaculus question rows for one public project, filtered by its slug. A slug that does not exist returns 404.

Required params: slug:path

Metaculus project questions documentation Try Metaculus project questions in Playground

GET/metaculus/question/{id}apiKey2 credits/request

Metaculus question detail

Returns one normalized Metaculus question from credential-free public page data.

Required params: id:path

Metaculus question detail documentation Try Metaculus question detail in Playground

GET/metaculus/question/{id}/forecast-historyapiKey3 credits/request

Metaculus question forecast history

Returns public aggregation forecast history points for one Metaculus question from credential-free public page data. The `method` enum accepts `recency_weighted`, `unweighted`, and `single_aggregation`.

Required params: id:path

Metaculus question forecast history documentation Try Metaculus question forecast history in Playground

GET/metaculus/question/{id}/forecastsapiKey3 credits/request

Metaculus question forecasts

Returns compact public latest forecast summaries by aggregation method for one Metaculus question.

Required params: id:path

Metaculus question forecasts documentation Try Metaculus question forecasts in Playground

GET/metaculus/question/{id}/metadataapiKey3 credits/request

Metaculus question metadata

Returns public metadata for one Metaculus question, including option labels, option history, scaling metadata, resolution fields, and timing fields when present.

Required params: id:path

Metaculus question metadata documentation Try Metaculus question metadata in Playground

GET/metaculus/question/{id}/optionsapiKey3 credits/request

Metaculus question options

Returns public multiple-choice option labels and latest option-level forecast values for one Metaculus question. The `method` enum accepts `recency_weighted`, `unweighted`, and `single_aggregation`.

Required params: id:path

Metaculus question options documentation Try Metaculus question options in Playground

GET/metaculus/questionsapiKey2 credits/request

Metaculus questions

Returns normalized Metaculus question rows from credential-free public page data. The endpoint fails closed on authenticated API responses or Cloudflare challenge pages.

Required params: None

Metaculus questions documentation Try Metaculus questions in Playground

GET/metaculus/top-commentsapiKey2 credits/request

Metaculus top comments feed

Returns normalized Metaculus question rows for the questions whose recent public comments collected the highest vote scores over roughly the last week. Derived from credential-free public Metaculus data; upstream comment bodies are not exposed.

Required params: None

Metaculus top comments feed documentation Try Metaculus top comments feed in Playground

GET/metaculus/tournament/{slug}/questionsapiKey2 credits/request

Metaculus tournament questions

Returns normalized Metaculus question rows for one public tournament, filtered by its slug. A slug that does not exist returns 404.

Required params: slug:path

Metaculus tournament questions documentation Try Metaculus tournament questions in Playground

Endpoint reference table

Endpoint	API path	Method	Credits	Required params	Docs	Playground
Metaculus category questions	/metaculus/category/{slug}/questions	GET	2 credits/request	slug:path	View docs	Try endpoint
Metaculus comments feed	/metaculus/comments-feed	GET	2 credits/request	None	View docs	Try endpoint
Metaculus project questions	/metaculus/project/{slug}/questions	GET	2 credits/request	slug:path	View docs	Try endpoint
Metaculus question detail	/metaculus/question/{id}	GET	2 credits/request	id:path	View docs	Try endpoint
Metaculus question forecast history	/metaculus/question/{id}/forecast-history	GET	3 credits/request	id:path	View docs	Try endpoint
Metaculus question forecasts	/metaculus/question/{id}/forecasts	GET	3 credits/request	id:path	View docs	Try endpoint
Metaculus question metadata	/metaculus/question/{id}/metadata	GET	3 credits/request	id:path	View docs	Try endpoint
Metaculus question options	/metaculus/question/{id}/options	GET	3 credits/request	id:path	View docs	Try endpoint
Metaculus questions	/metaculus/questions	GET	2 credits/request	None	View docs	Try endpoint
Metaculus top comments feed	/metaculus/top-comments	GET	2 credits/request	None	View docs	Try endpoint
Metaculus tournament questions	/metaculus/tournament/{slug}/questions	GET	2 credits/request	slug:path	View docs	Try endpoint

Related Crawlora API pages

Metaculus Scraper API Try the primary endpoint in Playground Browse supported platforms Crawlora API pricing Polymarket API documentation Kalshi API documentation

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Docs menu

API Reference

Metaculus API Documentation

Try Metaculus questions Start with endpoint docs Pricing

Quick start

Base URL: https://api.crawlora.net/api/v1
Auth header: x-api-key: $CRAWLORA_API_KEY
Primary endpoint: GET /metaculus/questions
Credit cost: 2 credits/request

curl -X GET "https://api.crawlora.net/api/v1/metaculus/questions?limit=10" \
  -H "x-api-key: $CRAWLORA_API_KEY"

Try Metaculus questions in Playground API key authentication Review Crawlora pricing

Metaculus API endpoints

These endpoint cards are generated from the active Crawlora endpoint catalog, including method, path, auth mode, credit cost, parameter summary, docs, and Playground links.

GET/metaculus/category/{slug}/questionsapiKey2 credits/request

Metaculus category questions

Required params: slug:path

Metaculus category questions documentation Try Metaculus category questions in Playground

GET/metaculus/comments-feedapiKey2 credits/request

Metaculus comments feed

Required params: None

Metaculus comments feed documentation Try Metaculus comments feed in Playground

GET/metaculus/project/{slug}/questionsapiKey2 credits/request

Metaculus project questions

Returns normalized Metaculus question rows for one public project, filtered by its slug. A slug that does not exist returns 404.

Required params: slug:path

Metaculus project questions documentation Try Metaculus project questions in Playground

GET/metaculus/question/{id}apiKey2 credits/request

Metaculus question detail

Returns one normalized Metaculus question from credential-free public page data.

Required params: id:path

Metaculus question detail documentation Try Metaculus question detail in Playground

GET/metaculus/question/{id}/forecast-historyapiKey3 credits/request

Metaculus question forecast history

Required params: id:path

Metaculus question forecast history documentation Try Metaculus question forecast history in Playground

GET/metaculus/question/{id}/forecastsapiKey3 credits/request

Metaculus question forecasts

Returns compact public latest forecast summaries by aggregation method for one Metaculus question.

Required params: id:path

Metaculus question forecasts documentation Try Metaculus question forecasts in Playground

GET/metaculus/question/{id}/metadataapiKey3 credits/request

Metaculus question metadata

Returns public metadata for one Metaculus question, including option labels, option history, scaling metadata, resolution fields, and timing fields when present.

Required params: id:path

Metaculus question metadata documentation Try Metaculus question metadata in Playground

GET/metaculus/question/{id}/optionsapiKey3 credits/request

Metaculus question options

Returns public multiple-choice option labels and latest option-level forecast values for one Metaculus question. The `method` enum accepts `recency_weighted`, `unweighted`, and `single_aggregation`.

Required params: id:path

Metaculus question options documentation Try Metaculus question options in Playground

GET/metaculus/questionsapiKey2 credits/request

Metaculus questions

Returns normalized Metaculus question rows from credential-free public page data. The endpoint fails closed on authenticated API responses or Cloudflare challenge pages.

Required params: None

Metaculus questions documentation Try Metaculus questions in Playground

GET/metaculus/top-commentsapiKey2 credits/request

Metaculus top comments feed

Required params: None

Metaculus top comments feed documentation Try Metaculus top comments feed in Playground

GET/metaculus/tournament/{slug}/questionsapiKey2 credits/request

Metaculus tournament questions

Returns normalized Metaculus question rows for one public tournament, filtered by its slug. A slug that does not exist returns 404.

Required params: slug:path

Metaculus tournament questions documentation Try Metaculus tournament questions in Playground

Endpoint reference table

Endpoint	API path	Method	Credits	Required params	Docs	Playground
Metaculus category questions	/metaculus/category/{slug}/questions	GET	2 credits/request	slug:path	View docs	Try endpoint
Metaculus comments feed	/metaculus/comments-feed	GET	2 credits/request	None	View docs	Try endpoint
Metaculus project questions	/metaculus/project/{slug}/questions	GET	2 credits/request	slug:path	View docs	Try endpoint
Metaculus question detail	/metaculus/question/{id}	GET	2 credits/request	id:path	View docs	Try endpoint
Metaculus question forecast history	/metaculus/question/{id}/forecast-history	GET	3 credits/request	id:path	View docs	Try endpoint
Metaculus question forecasts	/metaculus/question/{id}/forecasts	GET	3 credits/request	id:path	View docs	Try endpoint
Metaculus question metadata	/metaculus/question/{id}/metadata	GET	3 credits/request	id:path	View docs	Try endpoint
Metaculus question options	/metaculus/question/{id}/options	GET	3 credits/request	id:path	View docs	Try endpoint
Metaculus questions	/metaculus/questions	GET	2 credits/request	None	View docs	Try endpoint
Metaculus top comments feed	/metaculus/top-comments	GET	2 credits/request	None	View docs	Try endpoint
Metaculus tournament questions	/metaculus/tournament/{slug}/questions	GET	2 credits/request	slug:path	View docs	Try endpoint

Related Crawlora API pages

Metaculus Scraper API Try the primary endpoint in Playground Browse supported platforms Crawlora API pricing Polymarket API documentation Kalshi API documentation

Back to docs