Gender API for AI agents

Gender API determines the likely gender associated with a first name, email address, or username, used for data enrichment on contact and marketing records. Connect it once through Arc0, and your agent, or Claude, ChatGPT and Cursor, can use it through one MCP endpoint, limited to what each user approved.

Connect Gender API See the 9 actions ↓

Developer toolsAPI keyMCP + RESTgender-api.com

AUDIT LOG · GENDER APIPOLICY: acme-support

09:41:07 · claude · u_8f2read

gender_api.get_statistic

Get Gender API Statistics✓ allowed · 212ms

09:41:08 · claude · u_8f2read

gender_api.query_by_full_name

Query Gender by Full Name✓ allowed · 164ms

EVERY GENDER API CALL, ON THE RECORD

01 · USE CASES

What agents do in Gender API.

Check a name's likely gender

Query gender by first name to fill in a demographic field on a contact record.

Check gender by email address

Query gender by email when a contact record only has an email on file.

Read-only enrichment lookups

Keep every gender lookup read-only, since the API only returns a probability, not a change to any record.

02 · ACTIONS

9 Gender API actions, graded by risk.

Every Gender API action is tagged read, write or destructive, so one policy covers the whole app and new actions inherit the right default.

read

Look things up. Allowed by default.

gender_api.get_statistic
Get Gender API Statistics
gender_api.query_by_full_name
Query Gender by Full Name
gender_api.query_by_first_name
Gender From First Name
gender_api.get_country_of_origin
Get Country of Origin
gender_api.query_by_email_address
Query Gender by Email Address
gender_api.get_country_of_origin_v1
Get Country of Origin (v1)
gender_api.query_by_email_address_multiple
Query Gender by Multiple Email Addresses
gender_api.query_gender_by_full_name_multiple
Query Gender by Full Name (Multiple)
gender_api.query_gender_by_first_name_multiple
Query Gender by Multiple First Names

write

Create and change things. Allow, or ask the user first.

No write actions.

destructive

Delete, cancel or archive. Ask first, or deny outright.

No destructive actions.

03 · HOW IT WORKS

Gender API in three steps.

01Your users connect Gender APIThey add their Gender API api key on Arc0 Connect, under your brand. It goes straight into the vault.
02You set the rulesReads run, and writes like “updates” can wait for the user to approve.
03Any agent can actYour agent calls Gender API through the Arc0 SDK or MCP, and so can Claude, ChatGPT and Cursor. Every call lands on the audit log.

POLICY.TS

await arc0.policies.set('gender_api', {
  read: 'allow',
  write: 'ask',        
  destructive: 'deny',  
})

# Claude Code: the same connection, one URL
$ claude mcp add --transport http arc0 \
    https://mcp.arc0.ai/u/u_8f2

04 · AUTH AND DATA

How Gender API connects.

Users add their Gender API api key on Arc0 Connect. It is encrypted in the vault, never shown to the model, and each user can rotate or revoke it at any time.

The same Gender API connection serves your agent over MCP and your own backend over REST and the proxy, so a user connects once. How Arc0 handles credentials →

AUTH: API key
CREDENTIALS: Per-tenant encrypted vault
MODEL SEES: Results only, never credentials
AUDIT LOG: Every call, on every plan

05 · WORKS WITH

Use Gender API from any agent.

Claude

ChatGPT

Cursor

Codex

VS Code

OpenAI Agents SDK

Claude Agent SDK

Vercel AI SDK

Mastra

LangGraph

06 · RELATED

More developer tools apps.

Addressfinder17 actions

Addresszen2 actions

Alchemy36 actions

ALL DEVELOPER TOOLS APPS →

07 · FAQ

Gender API and Arc0, answered.

Q01

Can I use Gender API with Claude, ChatGPT or Cursor?

Yes. Connect Gender API to Arc0 once, then add your Arc0 MCP URL to Claude, ChatGPT, Cursor, Claude Code or any other remote-MCP client. Each assistant only gets the Gender API actions you allow.

Q02

How do users connect Gender API?

Users add their Gender API api key on Arc0 Connect. It is encrypted in the vault, never shown to the model, and each user can rotate or revoke it at any time.

Q03

Which Gender API actions can my agent take?

9 in total: 9 read, 0 write and 0 destructive. Your policies decide which of them each agent may call.

Q04

Can I make my agent read-only in Gender API?

Yes. Allow read actions and deny writes in the Gender API policy. Your agent can still look things up, and any write it attempts is blocked and logged.

Q05

Can my own backend call Gender API too?

Yes. The same Gender API connection is available over REST and through the Arc0 proxy, so your product and your agent share one connection per user.

Get started

Plug Gender API into your agent.

Your users connect Gender API once, under your brand. Your agent gets 9 actions behind your policies, with every call on the record.

Connect Gender API Browse all apps →

Free to build · MCP + REST · Audit log on every plan