Where does the data come from?

146 years of US Social Security Administration first-name records, 1880 to 2025, covering 105,966 names, and the Census Bureau's 162,253-surname frequency file. Both are official and public domain.

How is gender reported?

As a probability over the actual record count, so Michael returns male at 99.5% over 4.4 million records while Taylor returns female at 74%. Unknown names answer unknown rather than guessing.

Can I check many names at once?

Yes. The batch endpoint infers gender for a list of names in one call, which is how a list clean-up is normally done.

The records are US births and the Census, so probabilities reflect US naming. They work well for English-speaking markets and less well for names rare in the US.

How is it different from the Baby Names API?

Baby Names is built for browsing popularity and trends. This API is built for pipelines: gender probability, batch lookups and surname statistics.

ToolsMAINTAINED1 token / call

Name Intelligence API

Gender inference with real probabilities and popularity history for 105,966 first names and 162,253 surnames

Turn a first name into structured intelligence: gender with a real probability, all-time popularity, active years, peak year and per-decade history — built from 146 years of official US Social Security records (1880-2025, 105,966 distinct names) plus the Census Bureau's 162,253-surname frequency file. One call answers what gender-inference services charge monthly for: Michael -> male at 99.5% over 4.4M records; ambiguous names answer honestly (Taylor -> female at 74%); unknown strings return null instead of a guess. Batch up to 100 names per POST for CRM and list enrichment. Search names by prefix, gender or popularity; pull full statistics with decade-by-decade counts (watch Ada peak in 1918 and revive in the 2020s); look up any surname's rank, count and per-100k frequency (Smith #1, Nguyen #38). All source data is public domain and refreshes with the SSA's annual May release. Built for CRM enrichment, personalization, analytics, form autofill and demographic research — statistical inference from official records, not identity claims about individuals. Complements our Baby Names API (popularity browsing) with the data-enrichment side. Self-hosted — no third-party calls at request time.

Every call needs an X-Api-Key header. A free key includes 500 tokens a month, no card required. 1 token per call, so the free plan covers about 500 calls a month.

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response.json

{
  "ok": true,
  "count": 4,
  "results": [
    {
      "name": "Grace",
      "gender": "female",
      "probability": 0.9974,
      "count": 536340
    },
    {
      "name": "Liam",
      "gender": "male",
      "probability": 0.9985,
      "count": 359085
    },
    {
      "name": "Taylor",
      "gender": "female",
      "probability": 0.7441,
      "count": 443686
    },
    {
      "name": "Zzyzx",
      "gender": "male",
      "probability": 1,
      "count": 10
    }
  ]
}

Production Ready: Battle-tested infrastructure with a 99.9% uptime SLA. Rate limits are generous, responses are consistent.
Simple Integration: Standard REST + JSON. Works with any HTTP client. Copy-ready code snippets in 4 languages.
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Use cases for Name Intelligence API

Infer gender for a CRM or marketing list with a probability you can set a threshold on.
Personalise salutations and content where the data says the name is unambiguous.
Show a name's popularity, peak year and decade-by-decade history in a product or article.
Look up surname frequency and origin statistics for genealogy and research tools.

Name Intelligence API endpoints

Every endpoint with its parameters and a real example response.

OpenAPI definition Postman workspace

POSTBatch Infer Gender
GETData Sources
GETGet Name Statistics
GETGet Surname
GETInfer Gender
GETSearch First Names
GETSearch Surnames

POSTBatch Infer Gender

https://api-name-intelligence.dataandapis.com/v1/gender

Request body

{
  "names": [
    "Grace",
    "Liam",
    "Taylor"
  ]
}

Example request

curl -X POST "https://api-name-intelligence.dataandapis.com/v1/gender" \
  -H "X-Api-Key: YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{ "names": [ "Grace", "Liam", "Taylor" ] }'

Example response

{
  "ok": true,
  "count": 4,
  "results": [
    {
      "name": "Grace",
      "gender": "female",
      "probability": 0.9974,
      "count": 536340
    },
    {
      "name": "Liam",
      "gender": "male",
      "probability": 0.9985,
      "count": 359085
    },
    {
      "name": "Taylor",
      "gender": "female",
      "probability": 0.7441,
      "count": 443686
    },
    {
      "name": "Zzyzx",
      "gender": "male",
      "probability": 1,
      "count": 10
    }
…

Show full response

{
  "ok": true,
  "count": 4,
  "results": [
    {
      "name": "Grace",
      "gender": "female",
      "probability": 0.9974,
      "count": 536340
    },
    {
      "name": "Liam",
      "gender": "male",
      "probability": 0.9985,
      "count": 359085
    },
    {
      "name": "Taylor",
      "gender": "female",
      "probability": 0.7441,
      "count": 443686
    },
    {
      "name": "Zzyzx",
      "gender": "male",
      "probability": 1,
      "count": 10
    }
  ]
}

GETData Sources

https://api-name-intelligence.dataandapis.com/v1/sources

This endpoint takes no parameters.

Example request

curl "https://api-name-intelligence.dataandapis.com/v1/sources" \
  -H "X-Api-Key: YOUR_API_KEY"

Example response

{
  "ok": true,
  "count": 2,
  "sources": [
    {
      "slug": "census-surnames",
      "name": "US Census Bureau surnames (2010 Census)",
      "publisher": "US Census Bureau",
      "licence": "US Government work - public domain",
      "source_url": "https://www.census.gov/topics/population/genealogy/data/2010_surnames.html",
      "file_url": "https://www2.census.gov/topics/genealogy/2010surnames/names.zip",
      "cadence": "decennial",
      "record_count": 162253,
      "retrieved_at": "2026-09-02"
    },
    {
      "slug": "ssa-names",
      "name": "SSA national baby names 1880-2025",
      "publisher": "US Social Security Administration",
      "licence": "US Government work - public domain",
      "source_url": "https://www.ssa.gov/oact/babynames/",
      "file_url": "https://www.ssa.gov/oact/babynames/names.zip",
      "cadence": "annual (May release)",
      "record_count": 105966,
      "retrieved_at": "2026-09-02"
    }
  ]
}

GETGet Name Statistics

https://api-name-intelligence.dataandapis.com/v1/names/{name}

Path parameters

Parameter	Example
name	Ada	Required

Example request

curl "https://api-name-intelligence.dataandapis.com/v1/names/Ada" \
  -H "X-Api-Key: YOUR_API_KEY"

Example response

{
  "ok": true,
  "name": "Ada",
  "gender": "female",
  "gender_probability": 0.9974,
  "counts": {
    "male": 278,
    "female": 106905,
    "total": 107183
  },
  "years": {
    "first": 1880,
    "last": 2025,
    "peak": 1918
  },
  "peak_count": 1950,
  "by_decade": {
    "1880": 8451,
    "1890": 10422,
    "1900": 9129,
    "1910": 15286,
    "1920": 15212,
    "1930": 8521,
    "1940": 5890,
    "1950": 4306,
    "1960": 2874,
    "1970": 1929,
    "1980": 1617,
…

Show full response

{
  "ok": true,
  "name": "Ada",
  "gender": "female",
  "gender_probability": 0.9974,
  "counts": {
    "male": 278,
    "female": 106905,
    "total": 107183
  },
  "years": {
    "first": 1880,
    "last": 2025,
    "peak": 1918
  },
  "peak_count": 1950,
  "by_decade": {
    "1880": 8451,
    "1890": 10422,
    "1900": 9129,
    "1910": 15286,
    "1920": 15212,
    "1930": 8521,
    "1940": 5890,
    "1950": 4306,
    "1960": 2874,
    "1970": 1929,
    "1980": 1617,
    "1990": 1600,
    "2000": 3407,
    "2010": 9044,
    "2020": 9495
  }
}

GETGet Surname

https://api-name-intelligence.dataandapis.com/v1/surnames/{name}

Path parameters

Parameter	Example
name	Nguyen	Required

Example request

curl "https://api-name-intelligence.dataandapis.com/v1/surnames/Nguyen" \
  -H "X-Api-Key: YOUR_API_KEY"

Example response

{
  "ok": true,
  "name": "Nguyen",
  "rank": 38,
  "count": 437645,
  "per_100k": 148.36
}

GETInfer Gender

https://api-name-intelligence.dataandapis.com/v1/gender/{name}

Path parameters

Parameter	Example
name	Taylor	Required

Example request

curl "https://api-name-intelligence.dataandapis.com/v1/gender/Taylor" \
  -H "X-Api-Key: YOUR_API_KEY"

Example response

{
  "ok": true,
  "name": "Taylor",
  "gender": "female",
  "probability": 0.7441,
  "count": 443686
}

GETSearch First Names

https://api-name-intelligence.dataandapis.com/v1/names

Query parameters

Parameter	Example
gender	female	Optional
limit	20	Optional
min_total	10000	Optional
page	1	Optional
q	Ka	Optional

Example request

curl "https://api-name-intelligence.dataandapis.com/v1/names?gender=female&limit=20&min_total=10000&page=1&q=Ka" \
  -H "X-Api-Key: YOUR_API_KEY"

Example response

{
  "ok": true,
  "total": 68,
  "page": 1,
  "limit": 20,
  "count": 3,
  "results": [
    {
      "name": "Karen",
      "gender": "female",
      "gender_probability": 0.9972,
      "counts": {
        "male": 2785,
        "female": 987989,
        "total": 990774
      },
      "years": {
        "first": 1881,
        "last": 2025,
        "peak": 1957
      },
      "peak_count": 40668,
      "by_decade": {
        "1880": 49,
        "1890": 79,
        "1900": 98,
        "1910": 304,
        "1920": 564,
…

Show full response

{
  "ok": true,
  "total": 68,
  "page": 1,
  "limit": 20,
  "count": 3,
  "results": [
    {
      "name": "Karen",
      "gender": "female",
      "gender_probability": 0.9972,
      "counts": {
        "male": 2785,
        "female": 987989,
        "total": 990774
      },
      "years": {
        "first": 1881,
        "last": 2025,
        "peak": 1957
      },
      "peak_count": 40668,
      "by_decade": {
        "1880": 49,
        "1890": 79,
        "1900": 98,
        "1910": 304,
        "1920": 564,
        "1930": 16760,
        "1940": 168154,
        "1950": 333094,
        "1960": 286775,
        "1970": 95549,
        "1980": 35186,
        "1990": 24694,
        "2000": 20712,
        "2010": 7398,
        "2020": 1358
      }
    },
    {
      "name": "Kathleen",
      "gender": "female",
      "gender_probability": 0.9976,
      "counts": {
        "male": 1691,
        "female": 713645,
        "total": 715336
      },
      "years": {
        "first": 1880,
        "last": 2025,
        "peak": 1951
      },
      "peak_count": 26749,
      "by_decade": {
        "1880": 389,
        "1890": 1942,
        "1900": 3924,
        "1910": 16606,
        "1920": 33679,
        "1930": 34708,
        "1940": 153343,
        "1950": 224736,
        "1960": 121252,
        "1970": 45025,
        "1980": 39578,
        "1990": 24865,
        "2000": 10065,
        "2010": 3809,
        "2020": 1415
      }
    },
    {
      "name": "Katherine",
      "gender": "female",
      "gender_probability": 0.9972,
      "counts": {
        "male": 1824,
        "female": 650926,
        "total": 652750
      },
      "years": {
        "first": 1880,
        "last": 2025,
        "peak": 1990
      },
      "peak_count": 11657,
      "by_decade": {
        "1880": 6927,
        "1890": 9413,
        "1900": 12139,
        "1910": 36965,
        "1920": 42911,
        "1930": 25332,
        "1940": 40042,
        "1950": 67002,
        "1960": 50775,
        "1970": 54251,
        "1980": 99625,
        "1990": 97053,
        "2000": 65475,
        "2010": 34165,
        "2020": 10675
      }
    }
  ]
}

GETSearch Surnames

https://api-name-intelligence.dataandapis.com/v1/surnames

Query parameters

Parameter	Example
limit	20	Optional
max_rank	100	Optional
page	1	Optional
q	Ngu	Optional

Example request

curl "https://api-name-intelligence.dataandapis.com/v1/surnames?limit=20&max_rank=100&page=1&q=Ngu" \
  -H "X-Api-Key: YOUR_API_KEY"

Example response

{
  "ok": true,
  "total": 1,
  "page": 1,
  "limit": 20,
  "count": 1,
  "results": [
    {
      "name": "Nguyen",
      "rank": 38,
      "count": 437645,
      "per_100k": 148.36
    }
  ]
}

Where the data comes from

Source: US Social Security Administration first-name records 1880 to 2025 and the Census Bureau surname file (public domain).
Freshness: Annual reload when the SSA publishes the next year.

One install. Every endpoint.

No proprietary SDKs needed. Any HTTP client works. Pick your language and paste.

3languages

7endpoints

RESTarchitecture

1key for all APIs

Fully typed responses — auto-completion in your IDE
Tracks the API in lockstep — new endpoints land same day
One key works across 125+ APIs on the platform

import axios from 'axios';

const { data } = await axios.get(
  'https://api-name-intelligence.dataandapis.com/v1/gender',
  { headers: { 'X-Api-Key': process.env.API_KEY } }
);

Name Intelligence API · X-Api-Key

Explore the endpoints

Browse request parameters and inspect live example responses.

Available Endpoints

Request Parameters

API URL

Headers

X-Api-Key

Content-Type

Request Body

application/json

Target:

Client:

import axios from 'axios';

const url = 'https://api-name-intelligence.dataandapis.com/v1/gender';
const body = {
  "names": [
    "Grace",
    "Liam",
    "Taylor"
  ]
};

const { data } = await axios.post(url, body, {
  headers: {
    'X-Api-Key': 'YOUR_API_KEY',
    'Content-Type': 'application/json'
  }
});