# Open Trivia DB

**Canonical:** https://apis.io/providers/open-trivia-db/  
**Website:** https://opentdb.com  
**APIs profiled:** 3

The Open Trivia Database provides a completely free JSON API for use in programming projects. Use of this API does not require an API key, just generate the URL and use it in your own application to retrieve trivia questions across multiple categories, difficulties, and types.

## Kin Score — 21.8 / 100 (emerging)

Scored 2026-08-25 under rubric 0.14.0. Trend: flat (+0.0 from 21.8).

| Facet | Score |
|---|---|
| Discoverability | 64.8 |
| Contract Quality | 49.7 |
| Governance | 0.0 |
| Contract Governance | 0.0 |
| Operational Transparency | 7.9 |
| Developer Ergonomics | 9.5 |
| Commercial Clarity | 0.0 |
| Access Clarity | 0.0 |

## Agent readiness — 20.0 (agent-aware)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | na |
| MCP Server | no |
| Auth Clarity | no |
| Idempotency | na |
| Error Semantics | no |
| OpenAPI Examples | no |
| 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 |
| Delegated Identity | no |
| Protected Resource Metadata | no |
| Dynamic Client Registration | no |
| Agentic Commerce | no |

## Access

Freemium — onboarding: unknown, pricing: freemium, trial: no (confidence: medium).

## APIs (3)

- **Open Trivia DB Categories API** — Retrieve available trivia categories.
- **Open Trivia DB Questions API** — Retrieve trivia questions.
- **Open Trivia DB Tokens API** — Manage session tokens to track served questions.

## Agentic access (1)

- **Open Trivia Db Agentic Access** — 5 operations

## Security (1)

- **Open Trivia Db Domain Security** — TLSv1.3 · HSTS

## Plans (1)

- **Open Trivia Db Plans Pricing**

## Tags

Free, Games, Questions, Trivia

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