# Genderize.io

**Canonical:** https://apis.io/providers/genderize/  
**Website:** https://genderize.io  
**APIs profiled:** 1

Free REST API that predicts the gender of a first name with probability scores based on name statistics from millions of users worldwide. Part of the Demografix suite alongside Agify (age prediction) and Nationalize (nationality prediction), sharing a single API key across all three services.

## Kin Score — 41.7 / 100 (developing)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 41.7).

| Facet | Score |
|---|---|
| Discoverability | 68.5 |
| Contract Quality | 58.7 |
| Governance | 9.8 |
| Contract Governance | 9.8 |
| Operational Transparency | 44.7 |
| Developer Ergonomics | 9.5 |
| Commercial Clarity | 56.6 |
| Access Clarity | 56.6 |

## Agent readiness — 39.8 (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 | verified |
| 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

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

## APIs (1)

- **Genderize.io Gender Prediction API** — Predict the gender of one or more first names.

## Agentic access (1)

- **Genderize Agentic Access** — 1 operation

## Security (1)

- **Genderize Domain Security** — TLSv1.2 · DNSSEC · DMARC

## Plans (1)

- **Genderize Plans Pricing**

## Tags

Gender, Name, Prediction, Demographics, Machine-Learning, Statistics

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