# ConceptNet

**Canonical:** https://apis.io/providers/conceptnet/  
**Website:** https://conceptnet.io  
**APIs profiled:** 8

ConceptNet is a freely available multilingual knowledge graph that gives computers access to common-sense knowledge. It represents over 13 million links between concepts across 100+ languages, drawing from crowd-sourced resources (Open Mind Common Sense, Wiktionary), expert-created resources (WordNet, JMDict), and games with a purpose (Verbosity, nadya.jp). The public REST API provides JSON-LD responses and receives over 50,000 daily hits. ConceptNet also powers Numberbatch, a set of multilingual word embeddings aligned across languages that outperform word2vec, GloVe, and fastText on standard benchmarks.

## Kin Score — 37.0 / 100 (thin)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 37.0).

| Facet | Score |
|---|---|
| Discoverability | 81.5 |
| Contract Quality | 55.2 |
| Governance | 9.8 |
| Contract Governance | 9.8 |
| Operational Transparency | 34.2 |
| Developer Ergonomics | 26.2 |
| Commercial Clarity | 28.9 |
| Access Clarity | 28.9 |

Regulatory layer — **Government & Public Sector**: 11.1 (matched via tags).

## Agent readiness — 36.2 (agent-ready)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | na |
| MCP Server | no |
| Auth Clarity | no |
| Idempotency | na |
| Error Semantics | verified |
| OpenAPI Examples | partial |
| Rate Limit Signal | documented |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | na |

## Access

Free — onboarding: unknown, pricing: free, trial: no (confidence: medium).

## APIs (8)

- **ConceptNet REST API** — 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 ty...
- **ConceptNet Concepts API** — Look up concept nodes in the knowledge graph
- **ConceptNet Edges API** — Access individual edge (assertion) records
- **ConceptNet Query API** — Complex multi-parameter edge queries
- **ConceptNet Relations API** — Browse edges grouped by relation type
- **ConceptNet Similarity API** — Semantic similarity and relatedness using Numberbatch embeddings
- **ConceptNet Sources API** — Access provenance and source information
- **ConceptNet Utilities API** — URI normalization and text standardization

## Agentic access (1)

- **Conceptnet Agentic Access** — 9 operations

## Security (1)

- **Conceptnet Domain Security** — TLSv1.2

## Plans (1)

- **Conceptnet Plans Pricing**

## Tags

Knowledge Graph, NLP, Semantic Web, Common Sense, Multilingual, Word Embeddings, Linked Data, Open Data

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/conceptnet/). Scores are computed from the provider's own public artifacts under a published rubric.