ConceptNet Sources API
Access provenance and source information
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OpenAPI Specification
openapi: 3.2.0
info:
title: ConceptNet REST Concepts Sources API
description: ConceptNet is a freely available multilingual knowledge graph providing computers access to common-sense knowledge. The REST API exposes the full ConceptNet 5 knowledge graph via JSON-LD endpoints. Consumers can look up concept nodes by language and term, query edges by relation type, retrieve semantically related terms ranked by Numberbatch embedding similarity, compute pairwise relatedness scores between concepts, and normalize natural-language text into canonical ConceptNet URIs. No authentication or API key is required.
version: '5.7'
license:
name: CC BY-SA 4.0
url: https://creativecommons.org/licenses/by-sa/4.0/
contact:
name: ConceptNet Users Group
url: https://groups.google.com/g/conceptnet-users
x-website: https://conceptnet.io
x-github: https://github.com/commonsense/conceptnet5
servers:
- url: https://api.conceptnet.io
description: ConceptNet public API
tags:
- name: Sources
description: Access provenance and source information
paths:
/s/{sourcePath}:
get:
operationId: getSource
summary: Look up a data source
description: Returns information about a ConceptNet data source such as Open Mind Common Sense, Wiktionary, WordNet, or a specific contributor. Source URIs take the form /s/resource/{dataset} or /s/contributor/omcs/{username}.
tags:
- Sources
parameters:
- name: sourcePath
in: path
description: Source path (e.g. resource/wordnet/3.1 or contributor/omcs/johndoe)
required: true
schema:
type: string
example: resource/wordnet/3.1
- $ref: '#/components/parameters/offset'
- $ref: '#/components/parameters/limit'
responses:
'200':
description: Source node with provenance information
content:
application/json:
schema:
$ref: '#/components/schemas/SourceNode'
'404':
description: Source not found
content:
application/json:
schema:
$ref: '#/components/schemas/Error'
components:
parameters:
limit:
name: limit
in: query
description: Maximum number of results to return (0-1000)
required: false
schema:
type: integer
minimum: 0
maximum: 1000
default: 20
offset:
name: offset
in: query
description: Number of results to skip for pagination (0-100000)
required: false
schema:
type: integer
minimum: 0
maximum: 100000
default: 0
schemas:
SourceNode:
type: object
description: JSON-LD node representing a ConceptNet data source
properties:
'@context':
type: array
items:
type: string
'@id':
type: string
description: Source URI
example: /s/resource/wordnet/3.1
edges:
type: array
items:
$ref: '#/components/schemas/Edge'
view:
$ref: '#/components/schemas/Pagination'
Error:
type: object
description: API error response
properties:
error:
type: string
description: Error type identifier
details:
type: string
description: Human-readable error description
Edge:
type: object
description: A single ConceptNet assertion (knowledge edge)
properties:
'@id':
type: string
description: Unique URI identifier for this edge
example: /a/[/r/IsA/,/c/en/dog/,/c/en/animal/]
start:
$ref: '#/components/schemas/ConceptRef'
end:
$ref: '#/components/schemas/ConceptRef'
rel:
$ref: '#/components/schemas/RelationRef'
surfaceText:
type:
- string
- 'null'
description: Natural-language sentence the assertion was derived from
example: '[[A dog]] is a [[animal]].'
weight:
type: number
format: float
description: Confidence weight of the assertion (typically 1.0+)
example: 3.46
license:
type: string
description: Creative Commons license identifier
example: cc:by/4.0
dataset:
type: string
description: Dataset URI this assertion came from
example: /d/verbosity
sources:
type: array
items:
$ref: '#/components/schemas/SourceRef'
RelationRef:
type: object
description: Reference to a ConceptNet relation type
properties:
'@id':
type: string
description: Relation URI
example: /r/IsA
label:
type: string
description: Human-readable relation name
example: IsA
Pagination:
type: object
description: Pagination metadata for list responses
properties:
'@id':
type: string
description: URI of the current page
paginatedProperty:
type: string
description: Property name that contains the paginated items
example: edges
firstPage:
type: string
description: URI of the first page
nextPage:
type: string
description: URI of the next page (absent on last page)
previousPage:
type: string
description: URI of the previous page (absent on first page)
comment:
type: string
description: Human-readable summary of current result range
example: Results 1-20 of 143
ConceptRef:
type: object
description: Reference to a ConceptNet concept node
properties:
'@id':
type: string
description: ConceptNet URI
example: /c/en/dog
label:
type: string
description: Human-readable label
example: dog
language:
type: string
description: BCP-47 language code
example: en
term:
type: string
description: Concept URI (same as @id)
example: /c/en/dog
sense_label:
type: string
description: Part-of-speech or sense label if applicable
example: n
SourceRef:
type: object
description: Reference to a data source or contributor
properties:
'@id':
type: string
description: Source URI
example: /s/resource/verbosity