Properties
| Name | Type | Description |
|---|---|---|
| names | array | The values to resolve, each at most 200 characters. Each one costs one credit. |
| country | string | ISO-3166 alpha-2 code applied to every value in the batch. |
| locale | string | Language tag whose region becomes the batch country when `country` is not sent, for example `it-IT`. A tag without a region sets no country. |
| ip | string | End user IP address whose country becomes the batch country when neither `country` nor a regional `locale` is sent. Not stored. IP geolocation by DB-IP (db-ip.com), CC BY 4.0. |
| type | string | How to read the values in `names`. |
| ai_fallback | boolean | Ask a language model for values the dataset cannot answer. Requires AI lookups to be enabled in account settings; otherwise the batch fails with `ai_consent_required`. |
| best_guess | boolean | Return the most likely gender even below the confidence threshold, instead of null. For `email` and `username` batches it applies to the extracted first name. |
JSON Schema
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"$id": "https://raw.githubusercontent.com/api-evangelist/namegender/main/json-schema/namegender-bulk-request-schema.json",
"title": "BulkRequest",
"x-generated": "2026-10-06",
"x-method": "derived",
"x-generator": "derive-json-schema.py",
"x-source": "openapi/_original/namegender-api-openapi.json#/components/schemas/BulkRequest",
"type": "object",
"required": [
"names"
],
"properties": {
"names": {
"type": "array",
"minItems": 1,
"maxItems": 100,
"items": {
"type": "string",
"maxLength": 200
},
"description": "The values to resolve, each at most 200 characters. Each one costs one credit."
},
"country": {
"type": "string",
"minLength": 2,
"maxLength": 2,
"description": "ISO-3166 alpha-2 code applied to every value in the batch."
},
"locale": {
"type": "string",
"maxLength": 35,
"description": "Language tag whose region becomes the batch country when `country` is not sent, for example `it-IT`. A tag without a region sets no country."
},
"ip": {
"type": "string",
"maxLength": 45,
"description": "End user IP address whose country becomes the batch country when neither `country` nor a regional `locale` is sent. Not stored. IP geolocation by DB-IP (db-ip.com), CC BY 4.0."
},
"type": {
"type": "string",
"enum": [
"name",
"email",
"username"
],
"default": "name",
"description": "How to read the values in `names`."
},
"ai_fallback": {
"type": "boolean",
"default": false,
"description": "Ask a language model for values the dataset cannot answer. Requires AI lookups to be enabled in account settings; otherwise the batch fails with `ai_consent_required`."
},
"best_guess": {
"type": "boolean",
"default": false,
"description": "Return the most likely gender even below the confidence threshold, instead of null. For `email` and `username` batches it applies to the extracted first name."
}
}
}
Work with this as data
Every JSON Schema here is available over the APIs.io API and to AI agents over MCP.
MCP server
One button, every client — Claude, Cursor, VS Code and the rest.
https://apis.io/mcp
Tools for schemas
4 MCP tools reach this
find_json_schemasBrowse and filter every JSON Schema in the catalog.apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.resolveTurn a domain, URL or GitHub org into the provider it belongs to.find_cohortsEvery scored population of providers in the catalog.
Call it yourself
curl for this page
This JSON Schema
curl "https://apis.io/api/v1/json-schemas/namegender-bulk-request"
All schemas
curl "https://apis.io/api/v1/json-schemas?limit=25"
Discovery needs no key. Ratings and market analysis are Pro.
Get an API key
Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.
A second provider on the same verified email joins the account you already have.