Why Gender-API
Gender from a name. With the evidence attached.
Every answer comes with a probability and a sample count, so you decide which results to trust. 9,124,598 names from 193 countries.
100 free lookups every month.
- {
- "input": { "first_name": "Sandra" },
- "details": {
- "credits_used": 1, One name is one credit, so you know the price of a list before it runs.
- "samples": 464, How much data the answer rests on. Filter out weak answers.
- "country": null, Send a country, locale or IP address, and the answer uses that country's data where we have it.
- "first_name_sanitized": "sandra",
- "duration": "436ms"
- },
- "result_found": true, False when there is no answer for a name.
- "first_name": "Sandra",
- "probability": 0.85, How sure the answer is, from 0 to 1. You pick the threshold.
- "gender": "female"
- }
Send
Send names the way you have them.
A first name
Add a country, locale or IP address when you have one.
A full name
We split it into first and last name. Titles are removed, and particles like "van der" stay with the last name.
An e-mail address
We read the name out of the address.
Batches
100 names per request. Official clients for PHP, Python, Node, Java, Go, Ruby, Rust, Perl and .NET.
A CSV file
Up to 10,000,000 rows per file. No code.
An Excel workbook
Up to 300,000 rows. Styles, formulas, merged cells and the other sheets come back as they were.
Plug in
Use it where the names already are.
Native Excel add-in
Install it from Microsoft AppSource and work inside Excel.
Shopify app
Writes the gender into your customer meta fields.
MCP server
Lets an AI assistant look up names in our database.
Also with Google Sheets HubSpot Salesforce Mailchimp Klaviyo Zapier All integrations
Pay
Pay for the list, not for a subscription.
- One-off packages from €9.99
- Paid once. Nothing renews.
- Credits valid for 12 months
- Counted from your last purchase. We remind you before they expire.
- VAT invoice
- A VAT invoice for every purchase, with EU VAT IDs handled correctly.
- Monthly plans too
- For a steady volume every month.
Protect
Know where the names go.
A list of customer names is personal data. Here are the answers — the details are on the privacy overview.
- Where is the data processed?
- By a German company, on servers in Germany, inside the EU.
- What happens to the uploaded file?
- Stored encrypted and deleted five days after processing, or earlier if you delete it.
- Is there a data-processing agreement?
- Yes. You can request it in your account.
- What is logged?
- Server logs contain the submitted name and are kept for 14 days, for accounting.
Test it with your own names.
100 free lookups every month.
