Nationalize.io

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).

Nationalize.io publishes 1 API contract indexed on the APIs.io network: Nationality API. Tagged areas include Nationality, Name Prediction, Demographics, Probabilistic Models, and People.

The Nationalize.io catalog on APIs.io includes 1 JSON-LD context and 1 Spectral governance ruleset.

Nationalize.io’s developer surface includes authentication, documentation, pricing, FAQ, signup flow, and 10 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

37.6/100 thin ▬ flat Agent 47/100 agent native Front door AI 6/6 dominant saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessFreemiumSelf serve⚡ Free to try

1 published contract 1 MCP Servers

NationalityName PredictionDemographicsProbabilistic ModelsPeople

Kin Score

Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0

Composite quality — 37.6/100 · thin

Contract Quality 11.4 / 21

Developer Ergonomics 3.8 / 17

Access Clarity 7.8 / 17

Operational Transparency 0.9 / 11

Contract Governance 1.0 / 10

Discoverability 5.8 / 9

Regulatory Posture 3.7 / 15

Agent readiness — 47/100 · agent native

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 6 / 6

MCP Server 12 / 12

Machine-Readable Auth 10 / 10

Idempotency 9 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 7 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 4 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Pagination 5 / 5

Distinct Operations 3 / 3

MCP Tool Quality 6 / 6

Regulatory Posture applies to this provider. Its tags matched the Horizontal (data, software, accessibility, platform) regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.

Create-or-Update Ergonomics does not apply to this provider. The published contracts declare no write operations, and a read-only API cannot create-or-update. The facet is excluded from this provider's denominator entirely — not scored zero. A reference or data API is not deficient for being unable to upsert.

The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

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Agent readiness — checks not met, largest first (exact, from this profile):

A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document
Delegated User Identity +6 pts — a served discovery document listing authorization_code in grant_types_supported (served), else an oauth2 authorizationCode flow or openIdConnect declared in an OpenAPI (documented)
Typed Event Surface +6 pts — AsyncAPI document, OR webhooks/callbacks objects in the as-published OpenAPI, OR common[].type includes Webhooks
Agent Skills +5 pts — skills artifact present, graded by who authored it
Protected Resource Metadata +5 pts — a served /.well-known/oauth-protected-resource carrying `resource` (documented), and naming its authorization_servers (verified)

3 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Developer Ergonomics scores 22.6 — up to +15.5 composite points
Operational Transparency scores 7.9 — up to +12.0 composite points
Contract Quality scores 53.6 — up to +11.6 composite points

Each check links to what satisfies it. Publish the artifact, or tell us where it already lives, and the score moves on the next scoring run.

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from the provider profile at artifacts.apis.io/nationalize/apis.yml: open an issue on github.com/api-evangelist/nationalize to ask a question or point us at an artifact you publish. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Standards implemented 2

Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.

Model Context Protocol (MCP)

measured — observed by APIs.io (verified)

OpenAPI

measured — observed by APIs.io (published)

APIs 1

Individual APIs this provider publishes, each with its own machine-readable definition.

Nationalize.io Nationality API

Operations for predicting nationality from names

Open Collections 1

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

Nationalize.io Nationality API

OPEN COLLECTION

MCP Servers 1

Model Context Protocol servers that expose these APIs to AI agents.

Nationalize.io MCP Server

Remote MCP server at mcp.nationalize.io over HTTP; 1 tool listed.

MCP SERVER

Nationalize.io API pricing

Not yet checked against Nationalize.io's own pricing page. Compiled by API Evangelist; confirm before you rely on a figure. A free plan or tier is listed.

Plan	Price
Free	Free
Starter	$20
Standard	$60
Enterprise	—

Plan details, limits and sources →

Rate limits

Free Tier Daily Limit: 100
Free Tier Monthly Limit: 2500
Starter Monthly Limit: 25000

Compiled by API Evangelist, not yet checked against Nationalize.io's documentation. All 5 limits →

Pricing Plans 1

Published pricing tiers and plan structures.

Nationalize Plans Pricing

4 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Nationalize Rate Limits

5 limits

RATE LIMITS

Service Levels 1

Uptime the provider promises or reports, as SLA4OAI. Read from its own pages; APIs.io runs no monitors.

Nationalize.io

SLA

FinOps 1

Cost, billing, and metering signals for API financial operations.

Nationalize Finops

FINOPS

Semantic Vocabularies 1

JSON-LD contexts and semantic vocabularies used across these APIs.

Nationalize Context

2 classes · 5 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Nationalize.io — jsonschema rules

4 rules · 3 warnings 1 info

SPECTRAL

JSON Schema 1

Standalone JSON Schema definitions for this provider's data models.

NationalityResult

3 properties

JSON SCHEMA

Examples 3

Example request and response payloads for these APIs.

Batch Name Lookup

3 fields

EXAMPLE

Name Not Found

3 fields

EXAMPLE

Single Name Lookup

3 fields

EXAMPLE

Security Posture 2

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Nationalize Authentication

apiKey · 1 scheme

SECURITY

Nationalize Domain Security

TLSv1.2 · DNSSEC

SECURITY

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Nationalize Agentic Access

1 operation

1 operations · 0 acting

AGENTIC

Resources

Get Started 2

Portal, sign-up, and the first successful call

Login

Signup

Signup

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

Build 1

SDKs, sample code, and the tooling you integrate with

PostmanWorkspace

PostmanWorkspace

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

Operate 2

Status, limits, changes, and where to get help

RateLimits

RateLimits

FAQ

FAQ

Commercial 5

Pricing, plans, and the legal terms of use

Pricing

Plans

FinOps

TermsOfService

PrivacyPolicy

Company 1

The organization behind the API

Website

Website

Source (apis.yml)

aid: nationalize
name: Nationalize.io
description: 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).
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: high
  source:
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: freemium
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  gated: none
  gated_source:
  - onboarding
  label: Freemium · Self-serve signup
  confidence: medium
  source:
  - plans
  - authentication
  - security
  generated: '2026-11-06'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/nationalize.png
url: https://raw.githubusercontent.com/api-evangelist/nationalize/refs/heads/main/apis.yml
created: '2026-06-13'
modified: '2026-06-13'
specificationVersion: '0.23'
tags:
- Nationality
- Name Prediction
- Demographics
- Probabilistic Models
- People
apis:
- aid: nationalize:nationalize-nationality-api
  name: Nationalize.io Nationality API
  description: Operations for predicting nationality from names
  humanURL: https://nationalize.io/documentation
  baseURL: https://api.nationalize.io
  tags:
  - Nationality
  properties:
  - type: OpenAPI
    url: openapi/nationalize-nationality-api-openapi.yml
  - type: Documentation
    url: https://nationalize.io/documentation
  - type: Pricing
    url: https://nationalize.io/pricing
common:
- type: PostmanWorkspace
  url: https://www.postman.com/kinlaneapi/nationalizeio/overview
- type: AgenticAccess
  url: agentic-access/nationalize-agentic-access.yml
- type: DomainSecurity
  url: security/nationalize-domain-security.yml
- type: Authentication
  url: authentication/nationalize-authentication.yml
- type: Website
  url: https://nationalize.io
- type: Documentation
  url: https://nationalize.io/documentation
- type: Pricing
  url: https://nationalize.io/pricing
- type: Plans
  url: https://raw.githubusercontent.com/api-evangelist/nationalize/refs/heads/main/plans/nationalize-plans-pricing.yml
- type: RateLimits
  url: https://raw.githubusercontent.com/api-evangelist/nationalize/refs/heads/main/rate-limits/nationalize-rate-limits.yml
- type: FinOps
  url: https://raw.githubusercontent.com/api-evangelist/nationalize/refs/heads/main/finops/nationalize-finops.yml
- type: TermsOfService
  url: https://nationalize.io/legal/terms-and-conditions
- type: PrivacyPolicy
  url: https://nationalize.io/legal/privacy-policy
- type: FAQ
  url: https://nationalize.io/faq
- type: Login
  url: https://nationalize.io/login
- type: Signup
  url: https://nationalize.io/register
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

Nationalize.io API — frequently asked questions

Does Nationalize.io have an API?

Yes. APIs.io lists 1 API from Nationalize.io, including Nationalize.io Nationality API.

Is there an OpenAPI specification for the Nationalize.io API?

Yes. APIs.io indexes 1 OpenAPI specification for Nationalize.io, each linked for download from this page.

How do I authenticate with the Nationalize.io API?

Nationalize.io uses bearer-token authentication (apiKey · 1 scheme). The details are profiled on APIs.io as Nationalize Authentication.

How much does the Nationalize.io API cost?

APIs.io lists 4 pricing plans for Nationalize.io, with each plan's price, limits and inclusions under Pricing on this page.

Does Nationalize.io have an MCP server?

Yes. APIs.io lists 1 MCP server for Nationalize.io: Remote MCP server at mcp.nationalize.io over HTTP; 1 tool listed.

Is the Nationalize.io API ready for AI agents?

Nationalize.io has a Kin Score of 37.6 out of 100 (thin) and an Agent Readiness score of 46.8 (agent-native), scored by API Evangelist on 2026-11-06.

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