# Wordnik

**Canonical:** https://apis.io/providers/wordnik/  
**Website:** https://wordnik.com  
**APIs profiled:** 5

Wordnik is the largest online English dictionary by number of words. Its v4 REST API exposes definitions from five dictionaries, etymologies, real example sentences from millions of sources, audio pronunciations, related-word relationships, frequency over time, hyphenation, bi-gram phrases, scrabble scores, random words, reverse-dictionary lookup, word-of-the-day, and authenticated user word lists.

## Kin Score — 56.7 / 100 (strong)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 56.7).

| Facet | Score |
|---|---|
| Discoverability | 81.5 |
| Contract Quality | 61.0 |
| Governance | 25.0 |
| Contract Governance | 25.0 |
| Operational Transparency | 50.0 |
| Developer Ergonomics | 45.2 |
| Commercial Clarity | 73.7 |
| Access Clarity | 73.7 |

## Agent readiness — 34.1 (agent-ready)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | documented |
| MCP Server | no |
| Auth Clarity | yes |
| Idempotency | no |
| Error Semantics | no |
| 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 | no |

## Access

Freemium (free trial) · Self-serve signup — onboarding: self-serve, pricing: freemium, trial: yes (confidence: high).

## APIs (5)

- **Wordnik Account API** — API-key status and user authentication operations.
- **Wordnik Word API** — Operations on a single English word (definitions, etymologies, examples, pronunciations, related words, frequency, hyphenation, phrases, scrabble score, audio).
- **Wordnik Word List API** — Read and write operations on an individual user word list.
- **Wordnik Word Lists API** — Create new user word lists.
- **Wordnik Words API** — Cross-word operations (random words, reverse-dictionary search, full-text search, word-of-the-day).

## Agentic access (1)

- **Wordnik Agentic Access** — 28 operations · 6 acting

## Security (2)

- **Wordnik Authentication** — apiKey · 2 schemes
- **Wordnik Domain Security** — TLSv1.2 · HSTS · DMARC

## Plans (1)

- **Wordnik Plans Pricing**

## Tags

Dictionaries, Dictionary, Word Data, English, Lexicography, Public APIs

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