### Install Demografix Go SDK

Source: https://genderize.io/documentation/api/sdk

Install the Go package via go get. The package wraps all three APIs (gender, age, nationality) behind one API key.

```bash
go get github.com/DemografixGenderize/demografix-go
```

--------------------------------

### Install demografix with curl

Source: https://genderize.io/documentation/cli

One-line installer for macOS and Linux. Downloads and runs the install script from the demografix-cli repository.

```bash
curl -fsSL https://raw.githubusercontent.com/DemografixGenderize/demografix-cli/main/install.sh | sh
```

--------------------------------

### Install Demografix Ruby SDK

Source: https://genderize.io/documentation/api/sdk

Install the Ruby gem via gem install. The package wraps all three APIs (gender, age, nationality) behind one API key.

```bash
gem install demografix
```

--------------------------------

### Table output example

Source: https://genderize.io/documentation/cli

Example table output showing columns for name, gender, probability, and count.

```text
name   gender  probability  count
peter  male    1.00         1346866
```

--------------------------------

### Install Demografix Node SDK

Source: https://genderize.io/documentation/api/sdk

Install the Node package via npm. The package wraps all three APIs (gender, age, nationality) behind one API key.

```bash
npm install demografix
```

--------------------------------

### Install Demografix C# SDK

Source: https://genderize.io/documentation/api/sdk

Install the C# package via dotnet add package. The package wraps all three APIs (gender, age, nationality) behind one API key.

```bash
dotnet add package Demografix
```

--------------------------------

### JSONL output example

Source: https://genderize.io/documentation/cli

Example JSONL output when piped, one JSON object per line.

```json
{"name":"peter","gender":"male","probability":1.0,"count":1346866}
```

--------------------------------

### Install Demografix PHP SDK

Source: https://genderize.io/documentation/api/sdk

Install the PHP package via Composer. The package wraps all three APIs (gender, age, nationality) behind one API key.

```bash
composer require demografix/demografix
```

--------------------------------

### Basic usage with Go

Source: https://genderize.io/documentation/api

Use the net/http package to send a GET request and print the response body.

```go
package main

import (
    "fmt"
    "io"
    "net/http"
)

func main() {
    resp, _ := http.Get("https://api.genderize.io?name=peter")
    defer resp.Body.Close()
    body, _ := io.ReadAll(resp.Body)
    fmt.Println(string(body))
}
```

--------------------------------

### Install Demografix Python SDK

Source: https://genderize.io/documentation/api/sdk

Install the Python package via pip. The package wraps all three APIs (gender, age, nationality) behind one API key.

```bash
pip install demografix
```

--------------------------------

### Example JSON response

Source: https://genderize.io/documentation/api

A sample response for the name 'peter', showing the fields returned by the API.

```json
{
  "name": "peter",
  "gender": "male",
  "probability": 1.0,
  "count": 1346866
}
```

--------------------------------

### Localized API Response Example

Source: https://genderize.io/documentation/api

Example JSON response when localization is applied.

```JSON
{
  "name": "kim",
  "gender": "female",
  "probability": 0.94,
  "count": 62805,
  "country_id": "US"
}
```

--------------------------------

### Install demografix with Homebrew

Source: https://genderize.io/documentation/cli

Install demografix via Homebrew on macOS. Requires the Homebrew tap to be available.

```bash
brew install demografixgenderize/tap/demografix
```

--------------------------------

### Install Demografix Rust SDK

Source: https://genderize.io/documentation/api/sdk

Install the Rust crate via cargo add. The package wraps all three APIs (gender, age, nationality) behind one API key.

```bash
cargo add demografix
```

--------------------------------

### Basic usage with PHP

Source: https://genderize.io/documentation/api

Use file_get_contents to send a GET request and echo the response.

```php
$response = file_get_contents("https://api.genderize.io?name=peter");
echo $response;
```

--------------------------------

### Basic usage with Python

Source: https://genderize.io/documentation/api

Use the requests library to send a GET request and print the JSON response.

```python
import requests

response = requests.get("https://api.genderize.io", params={"name": "peter"})
print(response.json())
```

--------------------------------

### Basic usage with Ruby

Source: https://genderize.io/documentation/api

Use Net::HTTP to send a GET request and parse the JSON response.

```ruby
require "net/http"
require "json"

response = Net::HTTP.get(URI("https://api.genderize.io?name=peter"))
puts JSON.parse(response)
```

--------------------------------

### Basic usage with JavaScript

Source: https://genderize.io/documentation/api

Use fetch to send a GET request and parse the JSON response.

```javascript
const response = await fetch("https://api.genderize.io?name=peter");
const data = await response.json();
console.log(data);
```

--------------------------------

### Basic usage with cURL

Source: https://genderize.io/documentation/api

Send a GET request with a name query parameter using cURL.

```bash
curl "https://api.genderize.io?name=peter"
```

--------------------------------

### Batch response JSON array

Source: https://genderize.io/documentation/api

Example response for a batch request with three names. The array is in the same order as the input names.

```json
[
  { "name": "peter",  "gender": "male",   "probability": 1.0,  "count": 1346866 },
  { "name": "lois",   "gender": "female", "probability": 0.96, "count": 57781   },
  { "name": "stewie", "gender": "male",   "probability": 0.94, "count": 592     }
]
```

--------------------------------

### Error response JSON example

Source: https://genderize.io/documentation/api

Example error response body returned when the API key is not recognized. The response includes an 'error' field with a message corresponding to the HTTP status code.

```json
{
  "error": "Invalid API key"
}
```

--------------------------------

### Localize Predictions with Go

Source: https://genderize.io/documentation/api

Perform a GET request with the country_id query parameter.

```Go
package main

import (
    "fmt"
    "io"
    "net/http"
)

func main() {
    resp, _ := http.Get("https://api.genderize.io?name=kim&country_id=US")
    defer resp.Body.Close()
    body, _ := io.ReadAll(resp.Body)
    fmt.Println(string(body))
}
```

--------------------------------

### Install Demografix Elixir SDK

Source: https://genderize.io/documentation/api/sdk

Add the Elixir dependency to your mix.exs. The package wraps all three APIs (gender, age, nationality) behind one API key.

```elixir
{:demografix, "~> 1.0"}
```

--------------------------------

### Endpoint URL

Source: https://genderize.io/documentation/api

The base URL for the Genderize API. All requests are GET requests to this endpoint.

```text
https://api.genderize.io
```

--------------------------------

### GET /?name[]=...

Source: https://genderize.io/documentation/api

Send a batch of up to 100 names to predict gender. The response is an array in the same order as the input.

```APIDOC
## [GET] /?name[]=...

### Description
Send up to 100 names per request using repeated `name[]` parameters. The response is an array in the same order as the input.

### Method
GET

### Endpoint
https://api.genderize.io?name[]=peter&name[]=lois&name[]=stewie

### Parameters
#### Query Parameters
- **name[]** (string) - Required - Repeated parameter for each name to predict. Up to 100 names per request.

### Request Example
```
curl "https://api.genderize.io?name[]=peter&name[]=lois&name[]=stewie"
```

### Response
#### Success Response (200)
- **name** (string) - The input name.
- **gender** (string) - Predicted gender (e.g., "male" or "female").
- **probability** (number) - Probability of the prediction.
- **count** (integer) - Number of data entries used for prediction.

#### Response Example
```
[
  { "name": "peter",  "gender": "male",   "probability": 1.0,  "count": 1346866 },
  { "name": "lois",   "gender": "female", "probability": 0.96, "count": 57781   },
  { "name": "stewie", "gender": "male",   "probability": 0.94, "count": 592     }
]
```

### Notes
Each name in the batch counts toward your quota. A batch of 100 names consumes 100 from your monthly quota.
```

--------------------------------

### GET /?name={name}&apikey={apikey}

Source: https://genderize.io/documentation/api/reference

Predicts the gender of a given name using the global frequency model. Requires an API key.

```APIDOC
## [GET] /?name={name}&apikey={apikey}

### Description
Predicts the gender of a given name using the global frequency model. Requires an API key.

### Method
GET

### Endpoint
https://api.genderize.io?name={name}&apikey={apikey}

### Parameters
#### Query Parameters
- **name** (string) - Required - The first name to predict the gender for.
- **apikey** (string) - Required - Your API key for authentication.

### Request Example
```
curl "https://api.genderize.io?name=peter&apikey=YOUR_API_KEY"
```

### Response
#### Success Response (200)
- **name** (string) - The name that was queried.
- **gender** (string) - The predicted gender (e.g., "male" or "female").
- **probability** (number) - The probability of the prediction.
- **count** (number) - The number of records used for the prediction.

#### Response Example
```
{
  "name": "peter",
  "gender": "male",
  "probability": 0.99,
  "count": 178742
}
```
```

--------------------------------

### GET https://api.genderize.io

Source: https://genderize.io/documentation/api/reference

Batch usage of the Genderize.io API to predict gender for up to 100 names per request.

```APIDOC
## [GET] https://api.genderize.io

### Description
Send up to 100 names per request using repeated `name[]` parameters. The response is an array in the same order as the input.

### Method
GET

### Endpoint
https://api.genderize.io

### Parameters
#### Query Parameters
- **name[]** (string) - Required - The name to predict gender for. Can be repeated up to 100 times.

### Request Example
```
curl "https://api.genderize.io?name[]=peter&name[]=lois&name[]=stewie"
```

### Response
#### Success Response (200)
- **name** (string) - The name that was queried.
- **gender** (string) - The predicted gender (e.g., "male" or "female").
- **probability** (number) - The probability of the prediction.
- **count** (integer) - The number of records used for the prediction.

#### Response Example
```
[
  { "name": "peter",  "gender": "male",   "probability": 1.0,  "count": 1346866 },
  { "name": "lois",   "gender": "female", "probability": 0.96, "count": 57781   },
  { "name": "stewie", "gender": "male",   "probability": 0.94, "count": 592     }
]
```

### Notes
Each name in the batch counts toward your quota. A batch of 100 names consumes 100 from your monthly quota.
```

--------------------------------

### GET https://api.genderize.io

Source: https://genderize.io/documentation/api/reference

Predicts gender from a name. Send a name as a query parameter and receive a prediction with probability and count.

```APIDOC
## GET https://api.genderize.io

### Description
Predicts gender from a name. Send a name as a query parameter and receive a prediction with probability and count.

### Method
GET

### Endpoint
https://api.genderize.io

### Parameters
#### Query Parameters
- **name** (string) - Required - The name to predict gender for. Can be a full name or first name.

### Request Example
curl "https://api.genderize.io?name=peter"

### Response
#### Success Response (200)
- **name** (string) - The name from the request, echoed exactly as sent.
- **gender** (string) - "male" or "female". null when no prediction can be made.
- **probability** (number) - Confidence of the prediction, between 0 and 1.
- **count** (integer) - Data points the prediction was based on.

#### Response Example
{
  "name": "peter",
  "gender": "male",
  "probability": 1.0,
  "count": 1346866
}
```

--------------------------------

### GET https://api.genderize.io

Source: https://genderize.io/documentation/api

The Genderize API predicts gender from a name. Send a name, receive a probability. Authentication uses an API key from your account dashboard.

```APIDOC
## [GET] https://api.genderize.io

### Description
Predicts the gender of a given name. Send a name as a query parameter and receive the predicted gender, probability, and count of data points.

### Method
GET

### Endpoint
https://api.genderize.io

### Parameters
#### Query Parameters
- **name** (string) - Required - The name to predict gender for. Can be a full name or a first name.

### Request Example
```
curl "https://api.genderize.io?name=peter"
```

### Response
#### Success Response (200)
- **name** (string) - The name from the request, echoed exactly as sent.
- **gender** (string) - "male" or "female". null when no prediction can be made.
- **probability** (number) - Confidence of the prediction, between 0 and 1.
- **count** (integer) - Data points the prediction was based on.

#### Response Example
```
{
  "name": "peter",
  "gender": "male",
  "probability": 1.0,
  "count": 1346866
}
```
```

--------------------------------

### GET /

Source: https://genderize.io/documentation/api

Predicts the gender of a given name. Requires an API key for authentication. Optionally accepts a country_id to scope the prediction to a specific country.

```APIDOC
## GET /

### Description
Predicts the gender of a given name. Requires an API key for authentication. Optionally accepts a country_id to scope the prediction to a specific country.

### Method
GET

### Endpoint
https://api.genderize.io

### Parameters
#### Query Parameters
- **name** (string) - Required - The name to predict gender for.
- **apikey** (string) - Required - Your API key for authentication.
- **country_id** (string) - Optional - Two-letter ISO 3166-1 alpha-2 country code to scope the prediction.

### Request Example
```
curl "https://api.genderize.io?name=peter&apikey=YOUR_API_KEY"
```

### Response
#### Success Response (200)
- **name** (string) - The name that was queried.
- **gender** (string) - The predicted gender (e.g., "female").
- **probability** (number) - The probability of the prediction.
- **count** (integer) - The number of records used for the prediction.
- **country_id** (string) - The country code if localization was applied.

#### Response Example
```
{
  "name": "kim",
  "gender": "female",
  "probability": 0.94,
  "count": 62805,
  "country_id": "US"
}
```
```

--------------------------------

### GET /

Source: https://genderize.io/documentation/api/reference

The Genderize.io API returns a JSON object for single-name requests or an array for batch requests. Every response includes rate-limit headers. Errors return a JSON object with an error field and an appropriate HTTP status code.

```APIDOC
## GET /

### Description
Returns gender predictions for given names. Success returns a JSON object for single-name requests or an array for batch requests. Errors return a JSON object with an error field and an appropriate HTTP status code.

### Method
GET

### Endpoint
/

### Response
#### Success Response (200)
- Returns a single JSON object for single-name requests, or an array for batch requests. Field shapes are documented under Basic usage.

#### Response Example
{
  "name": "peter",
  "gender": "male",
  "probability": 0.99,
  "count": 1832
}

#### Rate-Limit Headers
- **X-Rate-Limit-Limit** (integer) - Total names allowed in the current window.
- **X-Rate-Limit-Remaining** (integer) - Names remaining in the current window.
- **X-Rate-Limit-Reset** (integer) - Seconds until the window resets.

#### Error Responses
- **401** - Invalid API key - The key was not recognized.
- **402** - Subscription is not active - The subscription tied to the key is paused, expired, or unpaid.
- **422** - Missing 'name' parameter - No name was sent.
- **422** - Invalid 'name' parameter - The name value is empty, too long, or otherwise malformed.
- **429** - Request limit reached - The monthly quota or per-IP limit is exhausted.
- **429** - Request too low to process - The request was throttled. Retry after a short delay.

#### Error Response Example
{
  "error": "Invalid API key"
}
```

--------------------------------

### GET /?name={name}&country_id={country_id}

Source: https://genderize.io/documentation/api/reference

Predicts the gender of a given name scoped to a specific country using the country_id parameter. Accepts a two-letter ISO 3166-1 alpha-2 country code.

```APIDOC
## [GET] /?name={name}&country_id={country_id}

### Description
Predicts the gender of a given name scoped to a specific country. The country_id parameter is a two-letter ISO 3166-1 alpha-2 code. Without country_id, the API uses the global frequency model.

### Method
GET

### Endpoint
https://api.genderize.io?name={name}&country_id={country_id}

### Parameters
#### Query Parameters
- **name** (string) - Required - The first name to predict the gender for.
- **country_id** (string) - Required - The two-letter ISO 3166-1 alpha-2 country code to scope the prediction.

### Request Example
```
curl "https://api.genderize.io?name=kim&country_id=US"
```

### Response
#### Success Response (200)
- **name** (string) - The name that was queried.
- **gender** (string) - The predicted gender (e.g., "male" or "female").
- **probability** (number) - The probability of the prediction.
- **count** (number) - The number of records used for the prediction.
- **country_id** (string) - The country code used for localization (echoed in the response).

#### Response Example
```
{
  "name": "kim",
  "gender": "female",
  "probability": 0.94,
  "count": 62805,
  "country_id": "US"
}
```
```

--------------------------------

### IMPORTAPI formula for Genderize API

Source: https://genderize.io/documentation/spreadsheet/mixed-analytics

Use this formula in Google Sheets to get gender predictions. Reference the cell holding the name (A2) and concatenate it into the URL. Drag down to enrich a list. Returns JSON; combine with QUERY or INDEX to extract fields.

```formula
=IMPORTAPI("https://api.genderize.io/?name="&A2&"&apikey=YOUR_API_KEY")
```

--------------------------------

### API URL Path for Genderize in Apipheny

Source: https://genderize.io/documentation/spreadsheet/apipheny

Set this as the API URL Path in Apipheny to get a gender prediction for a single name. Replace NAME with the cell range when using Apipheny's multiple query in one request mode to enrich a column.

```text
https://api.genderize.io/?name=NAME&apikey=YOUR_API_KEY
```

--------------------------------

### Preview cost with --dry-run

Source: https://genderize.io/documentation/cli/spreadsheets

Validates configuration and prints a plan (input rows, output, services, new columns, cost) without calling the API. Shows the exact plan layout; each enabled service bills one name per non-empty row.

```bash
demografix enrich people.csv -o out.csv --gender --age --name-col full_name --dry-run
```

```text
plan
  input        csv, 1200 rows
  output       out.csv
  services     gender, age
  name column  full_name
  country      none (global)
  new columns  gender, gender_count, gender_probability, age, age_count
  cost         2400 names — no API calls made
```

--------------------------------

### Batch request with PHP

Source: https://genderize.io/documentation/api/reference

Builds a query string with http_build_query and fetches the response using file_get_contents. Outputs the raw response.

```php
$query = http_build_query(["name" => ["peter", "lois", "stewie"]]);
$response = file_get_contents("https://api.genderize.io?$query");
echo $response;
```

--------------------------------

### Batch request with Go

Source: https://genderize.io/documentation/api/reference

Uses net/http and net/url to send a batch of names. Prints the response body.

```go
package main

import (
    "fmt"
    "io"
    "net/http"
    "net/url"
)

func main() {
    q := url.Values{}
    for _, n := range []string{"peter", "lois", "stewie"} {
        q.Add("name[]", n)
    }
    resp, _ := http.Get("https://api.genderize.io?" + q.Encode())
    defer resp.Body.Close()
    body, _ := io.ReadAll(resp.Body)
    fmt.Println(string(body))
}
```

--------------------------------

### Authenticate with demografix login

Source: https://genderize.io/documentation/cli

Log in once to save your API key. Prompts for the key without echoing it and stores it at ~/.config/demografix/config.toml.

```bash
demografix login
```

--------------------------------

### Enrich a signup file

Source: https://genderize.io/documentation/cli/spreadsheets

Enriches signups.csv with gender, age, and nationality, writing to signups_enriched.csv. The output can then be pivoted for demographic analysis of the cohort.

```bash
demografix enrich signups.csv -o signups_enriched.csv \
  --gender --age --nationality --name-col full_name
```

--------------------------------

### Authenticate API Requests with Go

Source: https://genderize.io/documentation/api

Use the net/http package to perform the authenticated request.

```Go
package main

import (
    "fmt"
    "io"
    "net/http"
)

func main() {
    resp, _ := http.Get("https://api.genderize.io?name=peter&apikey=YOUR_API_KEY")
    defer resp.Body.Close()
    body, _ := io.ReadAll(resp.Body)
    fmt.Println(string(body))
}
```

--------------------------------

### Verify MCP server connection

Source: https://genderize.io/documentation/mcp/claude-code

Verifies the connection by listing configured MCP servers. Genderize should appear with a green status indicator.

```bash
claude mcp list
```

--------------------------------

### Resume after interruption with --resume

Source: https://genderize.io/documentation/cli/spreadsheets

A failed request does not abort the run; partial output is written. Re-run with --resume to fill only rows whose prediction columns are still empty.

```bash
demografix enrich out.csv -o out.csv --gender --name-col full_name --resume
```

--------------------------------

### Set nationality candidate count with --top-n

Source: https://genderize.io/documentation/cli/spreadsheets

For nationality, --top-n controls how many country candidates are appended (1 to 5, default 3). With --top-n 5, the output adds country_1 through country_5, a country_N_probability for each, and nationality_count.

```bash
demografix enrich people.csv -o out.csv --nationality --name-col last_name --top-n 5
```

--------------------------------

### Authenticate API Requests with PHP

Source: https://genderize.io/documentation/api

Use file_get_contents to perform the authenticated request.

```PHP
$response = file_get_contents(
    "https://api.genderize.io?name=peter&apikey=YOUR_API_KEY"
);
echo $response;
```

--------------------------------

### Batch request with Ruby

Source: https://genderize.io/documentation/api/reference

Uses net/http and json to send a batch of names. Parses and prints the JSON response.

```ruby
require "net/http"
require "json"

uri = URI("https://api.genderize.io")
uri.query = URI.encode_www_form("name[]" => ["peter", "lois", "stewie"])
puts JSON.parse(Net::HTTP.get(uri))
```

--------------------------------

### Batch name lookup with name[] parameters (cURL, Python, JavaScript, PHP, Ruby, Go)

Source: https://genderize.io/documentation/api

Send up to 100 names per request using repeated name[] parameters. The response is an array in the same order as the input. Each name in the batch counts toward your monthly quota; a batch of 100 names consumes 100 from the quota.

```bash
curl "https://api.genderize.io?name[]=peter&name[]=lois&name[]=stewie"
```

```python
import requests

response = requests.get(
    "https://api.genderize.io",
    params={"name[]": ["peter", "lois", "stewie"]},
)
print(response.json())
```

```javascript
const params = new URLSearchParams();
["peter", "lois", "stewie"].forEach(n => params.append("name[]", n));

const response = await fetch(`https://api.genderize.io?${params}`);
console.log(await response.json());
```

```php
$query = http_build_query(["name" => ["peter", "lois", "stewie"]]);
$response = file_get_contents("https://api.genderize.io?$query");
echo $response;
```

```ruby
require "net/http"
require "json"

uri = URI("https://api.genderize.io")
uri.query = URI.encode_www_form("name[]" => ["peter", "lois", "stewie"])
puts JSON.parse(Net::HTTP.get(uri))
```

```go
package main

import (
    "fmt"
    "io"
    "net/http"
    "net/url"
)

func main() {
    q := url.Values{}
    for _, n := range []string{"peter", "lois", "stewie"} {
        q.Add("name[]", n)
    }
    resp, _ := http.Get("https://api.genderize.io?" + q.Encode())
    defer resp.Body.Close()
    body, _ := io.ReadAll(resp.Body)
    fmt.Println(string(body))
}
```

--------------------------------

### Set DEMOGRAFIX_API_KEY environment variable

Source: https://genderize.io/documentation/cli

Set the API key as an environment variable for scripts and CI. Takes precedence over the saved key.

```bash
export DEMOGRAFIX_API_KEY=your_api_key
```

--------------------------------

### Authenticate API Requests with Ruby

Source: https://genderize.io/documentation/api

Use Net::HTTP to send the request with the apikey.

```Ruby
require "net/http"
require "json"

uri = URI("https://api.genderize.io")
uri.query = URI.encode_www_form(name: "peter", apikey: "YOUR_API_KEY")
puts JSON.parse(Net::HTTP.get(uri))
```

--------------------------------

### Batch request with JavaScript

Source: https://genderize.io/documentation/api/reference

Uses fetch with URLSearchParams to send a batch of names. The response is logged to the console.

```javascript
const params = new URLSearchParams();
["peter", "lois", "stewie"].forEach(n => params.append("name[]", n));

const response = await fetch(`https://api.genderize.io?${params}`);
console.log(await response.json());
```

--------------------------------

### MCP server configuration for multiple services

Source: https://genderize.io/documentation/mcp

JSON configuration to add the Genderize, Agify, and Nationalize MCP servers to a client. Each server uses the same API key as a bearer token in the headers.

```json
{
  "mcpServers": {
    "genderize": {
      "url": "https://mcp.genderize.io",
      "headers": { "Authorization": "Bearer YOUR_API_KEY" }
    },
    "agify": {
      "url": "https://mcp.agify.io",
      "headers": { "Authorization": "Bearer YOUR_API_KEY" }
    },
    "nationalize": {
      "url": "https://mcp.nationalize.io",
      "headers": { "Authorization": "Bearer YOUR_API_KEY" }
    }
  }
}
```

--------------------------------

### Authenticate API Requests with Python

Source: https://genderize.io/documentation/api

Use the requests library to pass the apikey parameter.

```Python
import requests

response = requests.get(
    "https://api.genderize.io",
    params={"name": "peter", "apikey": "YOUR_API_KEY"},
)
print(response.json())
```

--------------------------------

### Batch request with Python

Source: https://genderize.io/documentation/api/reference

Uses the requests library to send a batch of names via the name[] parameter. The response is printed as JSON.

```python
import requests

response = requests.get(
    "https://api.genderize.io",
    params={"name[]": ["peter", "lois", "stewie"]},
)
print(response.json())
```

--------------------------------

### Authenticate API Requests with JavaScript

Source: https://genderize.io/documentation/api

Use the fetch API with URLSearchParams to include the apikey.

```JavaScript
const url = new URL("https://api.genderize.io");
url.searchParams.set("name", "peter");
url.searchParams.set("apikey", "YOUR_API_KEY");

const response = await fetch(url);
console.log(await response.json());
```

--------------------------------

### Authentication header for MCP server

Source: https://genderize.io/documentation/mcp

Send the API key as a bearer token in the Authorization header. Replace YOUR_API_KEY with your actual key from the dashboard.

```text
URL:    https://mcp.genderize.io
Header: Authorization: Bearer YOUR_API_KEY
```

--------------------------------

### Add Genderize MCP server via CLI

Source: https://genderize.io/documentation/mcp/claude-code

Adds the Genderize MCP server to Claude Code's user-scope config, making it available in every project. Replace YOUR_API_KEY with your dashboard key.

```bash
claude mcp add --transport http genderize https://mcp.genderize.io \
  --header "Authorization: Bearer YOUR_API_KEY" \
  --scope user
```

--------------------------------

### Prefix prediction columns with --prefix to avoid collisions

Source: https://genderize.io/documentation/cli/spreadsheets

A fresh run refuses to overwrite existing prediction columns. Add a prefix to the new column names when a collision would occur.

```bash
demografix enrich people.csv -o out.csv --gender --name-col full_name --prefix pred_
```

--------------------------------

### Split first and last name columns with --first-name-col and --last-name-col

Source: https://genderize.io/documentation/cli/spreadsheets

When first and last names are in separate columns, use split mode by providing both column headers. The backslash line continuation is shown for readability.

```bash
demografix enrich people.csv -o out.csv --gender \
  --first-name-col first --last-name-col last
```

--------------------------------

### Localize Predictions with PHP

Source: https://genderize.io/documentation/api

Include the country_id in the URL query string.

```PHP
$response = file_get_contents(
    "https://api.genderize.io?name=kim&country_id=US"
);
echo $response;
```

--------------------------------

### Batch request with cURL

Source: https://genderize.io/documentation/api/reference

Sends a batch of names using repeated name[] parameters in a cURL command. The response is an array in the same order as the input.

```bash
curl "https://api.genderize.io?name[]=peter&name[]=lois&name[]=stewie"
```

--------------------------------

### Genderize API request URL for Note API Connector

Source: https://genderize.io/documentation/spreadsheet/note-api-connector

Use this URL pattern in Note API Connector, mapping the 'name' query parameter to a Notion text property (typically 'First name'). Replace YOUR_API_KEY with your actual key.

```text
https://api.genderize.io/?name={{First name}}&apikey=YOUR_API_KEY
```

--------------------------------

### Check quota

Source: https://genderize.io/documentation/cli

Print the remaining quota for your key. Every prediction command also prints a one-line quota summary to standard error; suppress it with -q.

```bash
demografix quota
```

--------------------------------

### Choose name column by index with --name-col

Source: https://genderize.io/documentation/cli/spreadsheets

Use a 1-based column index instead of a header name when the column holding names is known by position. Here the second column is used as the name column for gender prediction.

```bash
demografix enrich people.csv -o out.csv --gender --name-col 2
```

--------------------------------

### Predict gender from standard input

Source: https://genderize.io/documentation/cli

Read one name per line from standard input to process a file of names in a single command. Groups names by country, batches 100 per request, and runs concurrently.

```bash
demografix gender < names.txt
```

--------------------------------

### Localize Predictions with Ruby

Source: https://genderize.io/documentation/api

Encode the country_id parameter in the URI query.

```Ruby
require "net/http"
require "json"

uri = URI("https://api.genderize.io")
uri.query = URI.encode_www_form(name: "kim", country_id: "US")
puts JSON.parse(Net::HTTP.get(uri))
```

--------------------------------

### Localize Predictions with JavaScript

Source: https://genderize.io/documentation/api

Set the country_id search parameter using the URL API.

```JavaScript
const url = new URL("https://api.genderize.io");
url.searchParams.set("name", "kim");
url.searchParams.set("country_id", "US");

const response = await fetch(url);
console.log(await response.json());
```

--------------------------------

### Authenticate API Requests with apikey

Source: https://genderize.io/documentation/api

Pass your API key as an apikey query parameter to authenticate requests.

```cURL
curl "https://api.genderize.io?name=peter&apikey=YOUR_API_KEY"
```

--------------------------------

### Aggregate names to CSV

Source: https://genderize.io/documentation/cli

Write predictions to a CSV file for aggregating the gender split of a list. The output carries one row per name with the predicted gender.

```bash
demografix gender < names.txt -o csv > predictions.csv
```

--------------------------------

### Predict age and nationality

Source: https://genderize.io/documentation/cli

Use the same binary and key to predict age and nationality by swapping the command.

```bash
demografix age peter
demografix nationality nguyen
```

--------------------------------

### Predict gender from arguments

Source: https://genderize.io/documentation/cli

Predict gender for names passed as command-line arguments.

```bash
demografix gender peter lois meg
```

--------------------------------

### Localize Predictions with Python

Source: https://genderize.io/documentation/api

Pass the country_id parameter in the requests params dictionary.

```Python
import requests

response = requests.get(
    "https://api.genderize.io",
    params={"name": "kim", "country_id": "US"},
)
print(response.json())
```

--------------------------------

### Edit JSON config for Genderize MCP

Source: https://genderize.io/documentation/mcp/claude-code

Directly edits ~/.claude.json to add the genderize entry under the top-level mcpServers key. Replace YOUR_API_KEY with your dashboard key.

```json
{
  "mcpServers": {
    "genderize": {
      "type": "http",
      "url": "https://mcp.genderize.io",
      "headers": {
        "Authorization": "Bearer YOUR_API_KEY"
      }
    }
  }
}
```

--------------------------------

### Enrich a CSV file with gender, age, and nationality

Source: https://genderize.io/documentation/cli/spreadsheets

Basic invocation of demografix enrich on people.csv. Enabled services append prediction columns: --gender adds gender, gender_count, gender_probability; --age adds age and age_count; --nationality adds ranked country candidates and nationality_count.

```bash
demografix enrich people.csv -o out.csv --gender --age --nationality --name-col full_name
```

--------------------------------

### Localize Predictions with cURL

Source: https://genderize.io/documentation/api

Use the country_id parameter to scope predictions to a specific country.

```cURL
curl "https://api.genderize.io?name=kim&country_id=US"
```

--------------------------------

### MCP server endpoint URL

Source: https://genderize.io/documentation/mcp

The endpoint for the Genderize MCP server. Use this URL when configuring an MCP-compatible client.

```text
https://mcp.genderize.io
```

--------------------------------

### Output gender prediction as JSON

Source: https://genderize.io/documentation/cli

Override the output format with -o. Accepts table, json, jsonl, tsv, and csv. Defaults to table on a terminal and jsonl when piped.

```bash
demografix gender peter -o json
```

--------------------------------

### Scope gender and age by per-row country column

Source: https://genderize.io/documentation/cli/spreadsheets

Use --country-col to read a country value from a column for each row. This applies that country to gender and age predictions for the corresponding row.

```bash
demografix enrich people.csv -o out.csv --gender --age --name-col full_name --country-col country
```

--------------------------------

### Predict gender with country scope

Source: https://genderize.io/documentation/cli

Scope predictions to a country using --country with an ISO 3166-1 alpha-2 code.

```bash
demografix gender andrea --country IT
```

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