
GenderAPI.io
GenderAPI.io provides an API to determine the gender associated with a given name, email address, or username.
Verdict
Common use cases
- Personalize email campaigns with inferred salutations
- Segment user lists by predicted gender
- Address support tickets with appropriate pronouns
- Validate name data quality in CRM imports
- Localize marketing copy for regional name patterns
Integration
- Vendor
- GenderAPI.io
- Category
- developer-tools
- Auth
- API_KEY
- Tools
- 6
- Composio slug
genderapi_io
Tools
- Gender API Get Statistics
Tool to retrieve account usage statistics from GenderAPI.io. Use when you need to check remaining API credits and expiry.
- Get Gender from Username
Tool to determine gender from a username or nickname. Use when you have an alias or handle and want to infer gender from that identifier.
- List Gender API Error Codes
Tool to list all possible error codes returned by Gender API. Use when debugging or validating API responses.
- Query gender by email address
Tool to determine gender from an email address. Use when you need to infer gender for personalization after obtaining proper consent.
- Query Gender by First Name
Tool to determine gender by querying first name. Use when you need to infer likely gender for a given name with optional localization hints.
- Query Gender by Full Name
Tool to determine gender from a full name. Extracts the first valid name token and queries the GenderAPI.io single-name endpoint. Use when you have a full name and want to infer likely gender.
Setup
Setup guide
- 11. In Switchy, open your workspace settings and navigate to the Integrations tab. 2. Search for GenderAPI.io in the MCP directory and click Connect. 3. You'll be prompted to paste an API key — log into your GenderAPI.io account (or sign up at genderapi.io if you don't have one), navigate to your dashboard, and copy the key displayed there. 4. Paste the key into Switchy and click Authorize. 5. Switchy will confirm the connection and display your remaining API credits. 6. Open any Space, type '@GenderAPI.io check gender for Alex' and send — if the MCP returns a result with a name, probability, and gender, the connection is working. 7. You can now @mention GenderAPI.io in any prompt to invoke its tools directly from your conversation.
What teammates see: by default, memories from GenderAPI.io are scoped to the Space (PROJECT visibility) - you can mark any memory PRIVATE or share it ORG-wide.
Works well with
Top models
Compatibility data appears once enough Spaces have used this MCP together with a given model.
How Switchy teams use it
Starter prompts
Infer Gender from Name
@GenderAPI.io query the gender for the first name Jordan and tell me the confidence levelOpen in a Space →
Check Email Gender
@GenderAPI.io determine the likely gender from the email address sam.rivera@example.comOpen in a Space →
Analyze Username Gender
@GenderAPI.io check the gender associated with the username skywalker92Open in a Space →
Review API Usage
@GenderAPI.io show me my current account statistics including remaining credits and expiry dateOpen in a Space →
Parse Full Name
@GenderAPI.io infer the gender from the full name Maria Gonzalez and return the confidence scoreOpen in a Space →
Example outputs
Illustrative - representative of the model's voice and quality, not literal recordings.
@GenderAPI.io what's the likely gender for the first name 'Jordan' in the US market?
Based on GenderAPI.io data, 'Jordan' in the US context returns: likely gender male (62% accuracy), with 1,847 samples in the database. The API notes this is a unisex name with regional variation—in some countries the distribution skews differently. This query consumed 1 credit from your account balance.
This read-heavy example shows the MCP's core name-to-gender inference. Important: results reflect statistical patterns in the API's training data, not individual identity. Always obtain user consent before using inferred gender for personalization, and provide opt-out mechanisms in production systems.
@GenderAPI.io check my account stats—how many credits do I have left this month?
Your GenderAPI.io account currently shows: 487 requests remaining out of your 500-request monthly quota. Your subscription renews on March 15, 2025. The account is on the Basic tier with no overage charges enabled. All requests this billing period have completed successfully with no error-code responses logged.
This example demonstrates the statistics tool, useful for monitoring API budget before batch operations. The MCP requires a valid API key with read access to account metadata. Rate limits apply per the vendor's tier—exceeding quota results in 402 errors unless overage billing is configured.
@GenderAPI.io I have a CSV with 200 email addresses for a newsletter campaign—can you infer likely gender distribution and flag any that might need manual review?
Processed 200 email addresses via GenderAPI.io. Distribution: 112 likely male (56%), 74 likely female (37%), 14 unresolved (7%). Flagged for manual review: 8 addresses with accuracy below 60%, and 6 with non-Latin script in the local-part that the API couldn't parse reliably. This analysis consumed 200 credits. Recommend: treat low-confidence results as 'unknown' and avoid gendered language in those cases.
This synthesis example pairs the MCP's batch-query capability with AI reasoning to surface actionable insights. Critical: email-based gender inference has ethical and legal implications—ensure GDPR/CCPA compliance, obtain explicit consent, and never use inferred gender for discriminatory purposes. The MCP does not store email addresses, but your prompt history does.
Use-case deep-dives
When GenderAPI wins for signup flow customization
A 6-person SaaS team wants to personalize welcome emails with gendered greetings for 2,000 monthly signups. GenderAPI's email and full-name tools handle this cleanly if you already collect names at registration and have explicit consent for personalization. The API returns confidence scores, so you can fall back to neutral language when accuracy is low. The statistics tool helps you monitor credit burn before you hit the monthly cap. This works best when your user base skews toward common Western names—accuracy drops for transliterated or non-binary identifiers. If your signup volume exceeds 10k/month or you need real-time inference during form submission, budget for the paid tier and test latency under load. Buy this if you're already collecting names and need a plug-and-play inference layer without building your own model.
When this MCP fits lead-list hygiene workflows
A 3-person sales ops team inherits a messy lead list with 5,000 contacts—some have full names, some only email addresses, some just LinkedIn handles. GenderAPI's username and email tools let you batch-enrich the list overnight to segment outreach by pronoun preference. The error-code tool helps you log failures for manual review instead of silently dropping records. This is a good fit if your outreach templates already use gendered language and your legal team has cleared the inference use case. It's not a fit if your list is international and includes names from regions where binary gender inference is culturally inappropriate or legally restricted. If more than 30% of your leads use gender-neutral handles or initials, expect to fall back to neutral templates anyway. Buy this if you're doing one-time enrichment or quarterly list hygiene, not real-time lookups during live calls.
When GenderAPI helps match customers to reps
A 10-person customer success team wants to route inbound tickets so customers can request agents who share their gender identity. GenderAPI's first-name tool infers customer gender from the ticket submitter field, then your routing logic matches to agent profiles. This works if your support platform exposes a pre-processing hook and your team has opted into preference-based routing. The statistics endpoint keeps you from burning credits on duplicate lookups for repeat customers. This is a borderline case: if your customer base is global or includes significant non-binary representation, inference will misfire often enough to hurt trust. If your ticket volume is under 500/month, manual tagging might be faster and more accurate. Buy this only if you've confirmed with your team and legal counsel that probabilistic gender inference aligns with your DEI commitments and regional privacy laws.
Frequently asked
What does the GenderAPI.io MCP do in Switchy?
It lets your AI agents infer likely gender from names, usernames, or email addresses by calling GenderAPI.io's prediction service. Useful for personalizing outreach, segmenting lists, or enriching contact data — but only where you have explicit consent and a legitimate use case, since gender inference carries bias and privacy risks.
Do I need a paid GenderAPI.io account to use this MCP?
Yes. You need an API key from GenderAPI.io, which means at least their free tier (500 requests/month). The MCP uses API_KEY auth, so paste your key into Switchy's connection form. The Get Statistics tool shows your remaining credits and expiry date so you don't hit quota mid-workflow.
Can it predict gender from non-Western names accurately?
GenderAPI.io supports localization hints (country codes) to improve accuracy for names outside the US and Europe, but no inference service is perfect. The Query Gender by First Name tool accepts an optional locale parameter. Test with your actual data before relying on it for production decisions.
Why use this MCP instead of calling GenderAPI.io directly?
The MCP wraps six common endpoints (name, email, username, stats, errors) so your agents can check credits, handle errors, and switch input types without you writing API boilerplate. If you only need one-off lookups, the vendor's dashboard is simpler. For agent-driven workflows, the MCP saves setup time.
Who on the team should connect this MCP?
Whoever owns your GenderAPI.io account and understands your data-use policies. Gender inference is legally sensitive in many jurisdictions (GDPR, CCPA), so the person connecting it should know which workflows are compliant and which aren't. Shared connections mean shared liability.