---
title: "Infer the likely gender of a name."
method: GET
path: "/api2/json/gender/{firstName}/{lastName}"
tags: ["personal"]
---

# Infer the likely gender of a name.

`GET /api2/json/gender/{firstName}/{lastName}`

## Path parameters

- `firstName` string, required
- `lastName` string, required

## Response `200`

A genderized name.

- FirstLastNameGenderedOut — Represents the output of inferring the LIKELY gender from a personal name.
  - `script` string
  - `id` string
  - `explanation` string
  - `firstName` string — The first name (also known as given name)
  - `lastName` string — The last name (also known as family name, or surname)
  - `likelyGender` 'male' | 'female' | 'unknown' — Most likely gender
  - `genderScale` number, double — Compatibility to NamSor_v1 Gender Scale M[-1..U..+1]F value.
  - `score` number, double — Compatibility to NamSor_v1 Gender score value. Higher score is better, but score is not normalized. Use calibratedProbability if available.
  - `probabilityCalibrated` number, double — The calibrated probability for inferred gender to have been guessed correctly. -1 = still calibrating.

## Other responses

- `401` — Missing or incorrect API Key
- `403` — Email not Verified, or API Limit Reached, or API Key Disabled
- `429` — Too Many Requests

---

[API](https://skmtc.net/namsor/apis/namsor-api-v2.md) · [All operations](https://skmtc.net/namsor/apis/namsor-api-v2/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/namsor/namsor-api-v2/versions/305e4f6eeaf5/schema)