# ConceptNet REST API

**Canonical:** https://apis.io/apis/conceptnet/conceptnet-rest-api/  
**Provider:** ConceptNet — https://apis.io/providers/conceptnet/  
**Base URL:** https://api.conceptnet.io  
**Documentation:** https://github.com/commonsense/conceptnet5/wiki/API

ConceptNet REST API is one of 8 APIs that [ConceptNet](https://apis.io/providers/conceptnet/) publishes on the [APIs.io](https://apis.io/) network. Tagged areas include Knowledge Graph, NLP, Semantic Relations, Multilingual, and Common Sense. The published artifact set on APIs.io includes API documentation and a getting-started guide.

The ConceptNet 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. Rate limits of 3,600 requests/hour and 120 requests/minute apply. The /related and /relatedness endpoints each count as 2 requests against the quota.

## Machine-readable artifacts (4)

- **Documentation** — https://github.com/commonsense/conceptnet5/wiki/API
- **GettingStarted** — https://github.com/commonsense/conceptnet5/wiki
- **Downloads** — https://github.com/commonsense/conceptnet5/wiki/Downloads
- **APIsJSON** — https://raw.githubusercontent.com/api-evangelist/conceptnet/refs/heads/main/apis.yml

## Other ConceptNet APIs (7)

- [ConceptNet Concepts API](https://apis.io/apis/conceptnet/conceptnet-concepts-api/)
- [ConceptNet Edges API](https://apis.io/apis/conceptnet/conceptnet-edges-api/)
- [ConceptNet Query API](https://apis.io/apis/conceptnet/conceptnet-query-api/)
- [ConceptNet Relations API](https://apis.io/apis/conceptnet/conceptnet-relations-api/)
- [ConceptNet Similarity API](https://apis.io/apis/conceptnet/conceptnet-similarity-api/)
- [ConceptNet Sources API](https://apis.io/apis/conceptnet/conceptnet-sources-api/)
- [ConceptNet Utilities API](https://apis.io/apis/conceptnet/conceptnet-utilities-api/)

## Tags

Knowledge Graph, NLP, Semantic Relations, Multilingual, Common Sense

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/conceptnet/conceptnet-rest-api/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/conceptnet/.