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Metaculus API endpoint

Metaculus question metadata API

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

GETapiKey3 credits/requestMetaculusmetaculus.metadataResponseDoc/metaculus/question/{id}/metadata

Endpoint facts

Method: GET
API path: /metaculus/question/{id}/metadata
Auth: apiKey
Credits: 3 credits/request
Charged on: Successful 2xx responses only
Platform: Metaculus
Response schema: #/definitions/metaculus.metadataResponseDoc

Metaculus Scraper API Try Metaculus question metadata API in Playground Metaculus API documentation

How this endpoint behaves

Path parameters:

id: required Metaculus question or post id, for example 43731.

Query parameters:

None.

Notable response behavior:

data.public_page_derived is true.
data.options, data.all_options_ever, and data.options_history are present for public multiple-choice questions when the page exposes them.
data.scaling, data.resolution, and data.possibilities are returned only when public page data exposes those fields.
Invalid ids return invalid-parameter errors before upstream IO.
Upstream authentication, challenge pages, missing question payloads, or parser drift is returned as a typed upstream error.

Live monitoring

Monitored request: GET /metaculus/question/42603/metadata
Checks passed, 7 days to 14 Oct 2026: 100%
Median response time: 2.83 s

Current status of every endpoint

Sampled response

Request, 14 Oct 2026: GET /metaculus/question/42603/metadata
Fields returned with a value: 32

Field	In the sample	Value in the sample
question.id	Has a value
question.question_id	Has a value
question.title	Has a value	“Which country will be first to factor the 2048-bit RSA chal…”
question.question_title	Has a value	“Which country will be first to factor the 2048-bit RSA chal…”
question.slug	Has a value
question.url	Has a value	metaculus.com
question.status	Has a value	“open”
question.question_type	Has a value	“multiple_choice”
question.comment_count	Has a value	5
question.forecaster_count	Has a value	5
question.forecasts_count	Has a value	11
question.latest_forecast_center	Has a value	0.47
question.latest_forecast_lower	Has a value	0.42
question.latest_forecast_upper	Has a value	0.61
question.open_time	Has a value	2026-06-22
question.scheduled_close_time	Has a value	2099-12-30
question.scheduled_resolve_time	Has a value	2099-12-30
question.published_at	Has a value	2026-06-21
question.edited_at	Has a value	2026-09-02
question.categories	Has a value	3 entries
question.projects	Has a value	1 entry
question.public_page_derived	Has a value
short_title	Has a value	“Which country will be first to factor the 2048-bit RSA chal…”
group_variable	Has a value	“Country”
options	Has a value	3 entries
all_options_ever	Has a value	3 entries
options_history	Has a value	1 entry
options_order	Has a value	“DEFAULT”
default_aggregation_method	Has a value	“recency_weighted”
default_score_type	Has a value	“peer”
actual_close_time	Has a value	2099-12-30
public_page_derived	Has a value

Request parameters

Parameter	Type	Required	Default	Description	Example
id (path)	string	Yes		Metaculus question or post id	43731
x-api-key (header)	string	Yes		API key required

cURL example

curl -X GET "https://api.crawlora.net/api/v1/metaculus/question/43731/metadata" \
  -H "x-api-key: $CRAWLORA_API_KEY"

Example JSON response

{
  "code": 200,
  "msg": "OK",
  "data": {
    "question": {
      "id": 43731,
      "question_id": 43761,
      "title": "OpenAI or Anthropic valuation?",
      "question_type": "multiple_choice",
      "public_page_derived": true
    },
    "group_variable": "Company",
    "options": [
      "OpenAI",
      "Anthropic"
    ],
    "options_history": [
      {
        "changed_at": "0001-01-01T00:00:00",
        "options": [
          "OpenAI",
          "Anthropic"
        ]
      }
    ],
    "public_page_derived": true
  }
}

Request schema

No body schema

Response schema

#/definitions/metaculus.metadataResponseDoc

Field	Type	Required	Example	Description
code	integer	No	200
data	metaculus.QuestionMetadataResponse	No
data.actual_close_time	string	No	2026-12-30T23:59:00Z	Time the question actually closed to forecasts, as Metaculus reports it.
data.actual_resolve_time	string	No	2027-01-02T00:00:00Z	Time the question actually resolved, as Metaculus reports it.
data.all_options_ever	array	No		Every option label the question has ever had.
data.default_aggregation_method	string	No	recency_weighted	Aggregation method Metaculus shows by default, for example `recency_weighted`.
data.default_score_type	string	No	peer	Score type Metaculus uses by default, for example `peer`.
data.fetched_at	string	No	2026-06-07T14:00:00Z	Time the data was fetched, in UTC (RFC 3339).
data.group_variable	string	No	Company	Name of the variable that distinguishes the questions in a group, for example `Company`.
data.inbound_outcome_count	integer	No	10	Number of outcomes inside the question's range.
data.include_bots_in_aggregates	boolean	No	false	Whether bot forecasts are included in the aggregate forecasts.
data.open_lower_bound	boolean	No	false	Whether the answer can fall below the lower end of the range.
data.open_upper_bound	boolean	No	false	Whether the answer can fall above the upper end of the range.
data.options	array	No		Current option labels of a multiple-choice question.
data.options_history	array	No		Earlier versions of the option list, when the options changed.
data.options_history[].changed_at	string	No	0001-01-01T00:00:00	Time the option list changed, as Metaculus reports it.
data.options_history[].options	array	No		Option labels in effect from that time.
data.options_order	string	No	DEFAULT	How the options are ordered, for example `DEFAULT`.
data.possibilities	unknown	No		Possible outcomes of the question, as Metaculus describes them.
data.public_page_derived	boolean	No	true	Always `true`: the values are those shown publicly on Metaculus, without a login.
data.question	object	No		Summary of the Metaculus question this response is about.
data.question.categories	array	No		Categories the question is filed under.
data.question.categories[].emoji	string	No	💼	Emoji shown next to the category or project on Metaculus.
data.question.categories[].id	integer	No	3698	Metaculus id of the category or project.
data.question.categories[].name	string	No	Economy & Business	Display name, for example `Economy & Business`.
data.question.categories[].slug	string	No	economy-business	URL slug, for example `economy-business`.
data.question.categories[].type	string	No	category	Kind of project, for example `category` or `tournament`.
data.question.comment_count	integer	No	16	Number of comments on the question.
data.question.edited_at	string	No	2026-06-07T13:14:34Z	Time the question was last edited, in UTC (RFC 3339).
data.question.forecaster_count	integer	No	54	Number of forecasters who have forecast on the question.
data.question.forecasts_count	integer	No	149	Total number of forecasts submitted on the question.
data.question.id	integer	No	43612	Metaculus post id of the question. Use it with the question endpoints.
data.question.latest_forecast_center	number	No	0.52	Central value of the latest community forecast, as Metaculus reports it.
data.question.latest_forecast_lower	number	No	0.37	Lower bound of the latest community forecast interval.
data.question.latest_forecast_upper	number	No	0.66	Upper bound of the latest community forecast interval.
data.question.open_time	string	No	2026-06-01T17:00:00Z	Time the question opened for forecasts, in UTC (RFC 3339).
data.question.projects	array	No		Tournaments and projects the question belongs to.
data.question.projects[].emoji	string	No	💼	Emoji shown next to the category or project on Metaculus.
data.question.projects[].id	integer	No	3698	Metaculus id of the category or project.
data.question.projects[].name	string	No	Economy & Business	Display name, for example `Economy & Business`.
data.question.projects[].slug	string	No	economy-business	URL slug, for example `economy-business`.
data.question.projects[].type	string	No	category	Kind of project, for example `category` or `tournament`.
data.question.public_page_derived	boolean	No	true	Always `true`: the values are those shown publicly on Metaculus, without a login.
data.question.published_at	string	No	2026-05-29T15:33:53Z	Time the question was published, in UTC (RFC 3339).
data.question.question_id	integer	No	43609	Metaculus id of the underlying question, which can differ from the post `id`.
data.question.question_title	string	No	What will be the World Bank monthly price of liquid sulphur in June 2026?	Full wording of the question.
data.question.question_type	string	No	numeric	Question type, for example `binary`, `numeric` or `multiple_choice`.
data.question.resolved	boolean	No	false	Whether the question has been resolved.
data.question.scheduled_close_time	string	No	2026-07-15T00:00:00Z	Time the question is scheduled to close to forecasts, in UTC (RFC 3339).
data.question.scheduled_resolve_time	string	No	2026-09-07T00:00:00Z	Time the question is scheduled to resolve, in UTC (RFC 3339).
data.question.slug	string	No	tampa-sulphur-price-in-june-2026	URL slug of the question.
data.question.status	string	No	open	Question status on Metaculus, for example `open`.
data.question.title	string	No	Tampa sulphur price in June 2026?	Question title as shown on Metaculus.
data.question.unit	string	No	USD/metric ton	Unit of the answer for numeric questions, for example `USD/metric ton`.
data.question.url	string	No	https://www.metaculus.com/questions/43612/tampa-sulphur-price-in-june-2026/	Metaculus page URL of the question.
data.resolution	string	No		Resolution of the question, as Metaculus reports it. Omitted while unresolved.
data.resolution_set_time	string	No	2027-01-02T00:00:00Z	Time the resolution was set, as Metaculus reports it.
data.scaling	object	No		Range and scale settings of a numeric or date question.
data.scaling.continuous_range	array	No		ContinuousRange passes through Metaculus's scaling.continuous_range: null for discrete questions, an array of numbers (the CDF internal locations) for continuous/numeric ones. It was previously typed []string, so hydrating a commented continuous question failed to decode and 503'd the comments feeds; numbers are the correct element type.
data.scaling.inbound_outcome_count	integer	No	10	Number of outcomes inside the question's range.
data.scaling.nominal_max	number	No	100	Highest value of the range as shown to forecasters.
data.scaling.nominal_min	number	No	0	Lowest value of the range as shown to forecasters.
data.scaling.open_lower_bound	boolean	No	false	Whether the answer can fall below the lower end of the range.
data.scaling.open_upper_bound	boolean	No	false	Whether the answer can fall above the upper end of the range.
data.scaling.range_max	number	No	100	Upper end of the question's range.
data.scaling.range_min	number	No	0	Lower end of the question's range.
data.scaling.zero_point	number	No	0	Zero point of the question's range, when Metaculus defines one.
data.short_title	string	No	OpenAI or Anthropic - higher valuation on Jan 1, 2027?	Short form of the question title.
data.source_url	string	No	https://www.metaculus.com/questions/43731/	URL the data was read from.
msg	string	No	OK

Failure responses

Status	Description	Schema
400	Bad Request	#/definitions/app.Response
404	Not Found	#/definitions/app.Response
429	Too Many Requests	#/definitions/app.Response
500	Internal Server Error	#/definitions/app.Response
503	Service Unavailable	#/definitions/app.Response

Code examples

Use environment variables for secrets and keep Crawlora API keys server-side.

curl -X GET "https://api.crawlora.net/api/v1/metaculus/question/43731/metadata" \
  -H "x-api-key: $CRAWLORA_API_KEY"

Shared guides

Authentication Errors and retries Rate limits and credits Pricing Acceptable use

More Metaculus endpoint docs Metaculus Scraper API Metaculus category questions API documentation Metaculus comments feed API documentation Metaculus project questions API documentation Metaculus question detail API documentation Metaculus question forecast history API documentation Metaculus question forecasts API documentation

Open in Playground Back to group

How this endpoint behaves

Path parameters:

id: required Metaculus question or post id, for example 43731.

Query parameters:

None.

Notable response behavior:

data.public_page_derived is true.

data.options, data.all_options_ever, and data.options_history are present for public multiple-choice questions when the page exposes them.

data.scaling, data.resolution, and data.possibilities are returned only when public page data exposes those fields.

Invalid ids return invalid-parameter errors before upstream IO.

Upstream authentication, challenge pages, missing question payloads, or parser drift is returned as a typed upstream error.

Sampled response

Request, 14 Oct 2026

GET /metaculus/question/42603/metadata

Fields returned with a value

Field	In the sample	Value in the sample
question.id	Has a value
question.question_id	Has a value
question.title	Has a value	“Which country will be first to factor the 2048-bit RSA chal…”
question.question_title	Has a value	“Which country will be first to factor the 2048-bit RSA chal…”
question.slug	Has a value
question.url	Has a value	metaculus.com
question.status	Has a value	“open”
question.question_type	Has a value	“multiple_choice”
question.comment_count	Has a value	5
question.forecaster_count	Has a value	5
question.forecasts_count	Has a value	11
question.latest_forecast_center	Has a value	0.47
question.latest_forecast_lower	Has a value	0.42
question.latest_forecast_upper	Has a value	0.61
question.open_time	Has a value	2026-06-22
question.scheduled_close_time	Has a value	2099-12-30
question.scheduled_resolve_time	Has a value	2099-12-30
question.published_at	Has a value	2026-06-21
question.edited_at	Has a value	2026-09-02
question.categories	Has a value	3 entries
question.projects	Has a value	1 entry
question.public_page_derived	Has a value
short_title	Has a value	“Which country will be first to factor the 2048-bit RSA chal…”
group_variable	Has a value	“Country”
options	Has a value	3 entries
all_options_ever	Has a value	3 entries
options_history	Has a value	1 entry
options_order	Has a value	“DEFAULT”
default_aggregation_method	Has a value	“recency_weighted”
default_score_type	Has a value	“peer”
actual_close_time	Has a value	2099-12-30
public_page_derived	Has a value

Parameter

Type

Required

Default

Description

Example

id (path)

string

Yes

Metaculus question or post id

43731

x-api-key (header)

string

Yes

API key required

{ "code": 200, "msg": "OK", "data": { "question": { "id": 43731, "question_id": 43761, "title": "OpenAI or Anthropic valuation?", "question_type": "multiple_choice", "public_page_derived": true }, "group_variable": "Company", "options": [ "OpenAI", "Anthropic" ], "options_history": [ { "changed_at": "0001-01-01T00:00:00", "options": [ "OpenAI", "Anthropic" ] } ], "public_page_derived": true } }

Field

Type

Required

Enum

Bounds

Example

Description

code

integer

200

data

metaculus.QuestionMetadataResponse

data.actual_close_time

string

2026-12-30T23:59:00Z

Time the question actually closed to forecasts, as Metaculus reports it.

data.actual_resolve_time

string

2027-01-02T00:00:00Z

Time the question actually resolved, as Metaculus reports it.

data.all_options_ever

array

Every option label the question has ever had.

data.default_aggregation_method

string

recency_weighted

Aggregation method Metaculus shows by default, for example `recency_weighted`.

data.default_score_type

string

peer

Score type Metaculus uses by default, for example `peer`.

data.fetched_at

string

2026-06-07T14:00:00Z

Time the data was fetched, in UTC (RFC 3339).

data.group_variable

string

Company

Name of the variable that distinguishes the questions in a group, for example `Company`.

data.inbound_outcome_count

integer

Number of outcomes inside the question's range.

data.include_bots_in_aggregates

boolean

false

Whether bot forecasts are included in the aggregate forecasts.

data.open_lower_bound

boolean

false

Whether the answer can fall below the lower end of the range.

data.open_upper_bound

boolean

false

Whether the answer can fall above the upper end of the range.

data.options

array

Current option labels of a multiple-choice question.

data.options_history

array

Earlier versions of the option list, when the options changed.

data.options_history[].changed_at

string

0001-01-01T00:00:00

Time the option list changed, as Metaculus reports it.

data.options_history[].options

array

Option labels in effect from that time.

data.options_order

string

DEFAULT

How the options are ordered, for example `DEFAULT`.

data.possibilities

unknown

Possible outcomes of the question, as Metaculus describes them.

data.public_page_derived

boolean

true

Always `true`: the values are those shown publicly on Metaculus, without a login.

data.question

object

Summary of the Metaculus question this response is about.

data.question.categories

array

Categories the question is filed under.

data.question.categories[].emoji

string

💼

Emoji shown next to the category or project on Metaculus.

data.question.categories[].id

integer

3698

Metaculus id of the category or project.

data.question.categories[].name

string

Economy & Business

Display name, for example `Economy & Business`.

data.question.categories[].slug

string

economy-business

URL slug, for example `economy-business`.

data.question.categories[].type

string

Metaculus question metadata API

Endpoint facts

How this endpoint behaves

Live monitoring

Sampled response

Request parameters

cURL example

Example JSON response

Failure responses

Code examples

Shared guides

Related

Metaculus question metadata API

Endpoint facts

How this endpoint behaves

Live monitoring

Sampled response

Request parameters

cURL example

Example JSON response

Failure responses

Code examples

Shared guides

Related