# Nationalize.io

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

Free REST API that predicts the nationality of a person based on their first name using probabilistic models derived from a dataset of approximately one billion people spanning 250 countries and territories. Accepts single or batched names, handles diacritics and non-Latin alphabets, and returns ranked country probabilities as JSON. The same API key works across all three Demografix services (Genderize, Agify, Nationalize).

## Kin Score — 47.1 / 100 (developing)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 47.1).

| Facet | Score |
|---|---|
| Discoverability | 68.5 |
| Contract Quality | 60.8 |
| Governance | 9.8 |
| Contract Governance | 9.8 |
| Operational Transparency | 31.6 |
| Developer Ergonomics | 21.4 |
| Commercial Clarity | 77.6 |
| Access Clarity | 77.6 |

## Agent readiness — 50.0 (agent-native)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | na |
| MCP Server | no |
| Auth Clarity | yes |
| 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 · Self-serve signup — onboarding: self-serve, pricing: freemium, trial: no (confidence: high).

## APIs (1)

- **Nationalize.io Nationality API** — Operations for predicting nationality from names

## Agentic access (1)

- **Nationalize Agentic Access** — 1 operation

## Security (2)

- **Nationalize Authentication** — apiKey · 1 scheme
- **Nationalize Domain Security** — TLSv1.2 · DNSSEC

## Plans (1)

- **Nationalize Plans Pricing**

## Tags

Nationality, Name Prediction, Demographics, Probabilistic Models, People

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