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POST
/
v2
/
rel
Reverse Email Lookup API
curl --request POST \
  --url https://api.cufinder.io/v2/rel \
  --header 'Content-Type: application/json' \
  --header 'x-api-key: <api-key>' \
  --data '
{
  "email": "<string>"
}
'

​
Common Use Cases

An email address on its own says little until you know who is actually behind it.
  • Lead Capture: Identifying the person behind an inbound email address.
  • CRM Enrichment: Turning a bare email into a full contact record.
  • Verification: Checking who is really behind a signup.
  • Sales Research: Learning who you are talking to before you reply.
  • Data Enrichment: Backfilling names and roles from email addresses.
Credit usage is 4 per record found.

​
Attributes

​
email
string
required
Email address

​
Response

{
    "status": 1,
    "data": {
        "confidence_level": 98,
        "query": "iain.mckenzie@stripe.com",
        "person": {
            "first_name": "iain",
            "last_name": "mckenzie",
            "full_name": "iain mckenzie",
            "linkedin_url": "linkedin.com/in/iain-mckenzie",
            "summary": null,
            "followers_count": 0,
            "facebook": null,
            "twitter": null,
            "avatar": "media.cufinder.io/person_profile/iain-mckenzie",
            "country": "canada",
            "state": null,
            "city": null,
            "job_title": "engineering",
            "job_title_categories": [],
            "company_name": "stripe",
            "company_linkedin": "linkedin.com/company/stripe",
            "company_website": "https://stripe.com",
            "company_size": "1,001-5,000",
            "company_industry": "technology, information and internet",
            "company_facebook": "facebook.com/stripepayments",
            "company_twitter": "twitter.com/stripe",
            "company_country": "united states",
            "company_state": "california",
            "company_city": "south san francisco"
        },
        "credit_count": 9781
    }
}

​
Reverse Email Lookup API Typescript SDK

 import { Cufinder } from '@cufinder/cufinder-ts';

// Initialize the client
const client = new Cufinder('your-api-key-here');

// Initialize with more options
const client = new Cufinder('your-api-key-here', { timeout: 60000 });

const result = await client.rel('iain.mckenzie@stripe.com');
console.log(result);

​
Reverse Email Lookup API Python SDK

 from cufinder import Cufinder

# Initialize the client
client = Cufinder('your-api-key-here')

# Initialize with more options
client = Cufinder('your-api-key-here', timeout=60)

result = client.rel('iain.mckenzie@stripe.com')
print(result)

​
Reverse Email Lookup API Go SDK

package main

import (
    "fmt"
    "log"
    
    "github.com/cufinder/cufinder-go"
)

func main() {
    // Initialize the client
    sdk := cufinder.NewSDK("your-api-key-here")
    
    // Initialize with more options
    sdk := cufinder.NewSDKWithConfig(cufinder.ClientConfig{
        APIKey:     "your-api-key-here",
        BaseURL:    "https://api.cufinder.io/v2",
        Timeout:    60 * time.Second,
        MaxRetries: 3,
    })
}

result, err := sdk.REL("iain.mckenzie@stripe.com")
if err != nil {
    log.Fatal(err)
}
fmt.Println(result)

​
Reverse Email Lookup API Ruby SDK

 require 'cufinder_ruby'

# Initialize the client
client = Cufinder::Client.new(api_key: 'your-api-key-here')

# Initialize with more options
client = Cufinder::Client.new(
    api_key: 'your-api-key-here',
    timeout: 60,
    max_retries: 3
)

result = client.rel(email: 'iain.mckenzie@stripe.com')
puts result

​
Reverse Email Lookup API Rust SDK

 use cufinder_rust::CufinderSDK;

#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
    // Initialize the client
    let sdk = CufinderSDK::new("your-api-key-here".to_string())?;
    
    // Initialize with more options
    let sdk = CufinderSDK::with_config(ClientConfig {
        api_key: "your-api-key-here".to_string(),
        base_url: "https://api.cufinder.io/v2".to_string(),
        timeout: Duration::from_secs(60),
        max_retries: 3,
    })?;
    
    Ok(())
}

let result = sdk.rel("iain.mckenzie@stripe.com").await?;
println!("{:?}", result);

​
Reverse Email Lookup API Rust SDK

 use cufinder_rust::CufinderSDK;

#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
    // Initialize the client
    let sdk = CufinderSDK::new("your-api-key-here".to_string())?;
    
    // Initialize with more options
    let sdk = CufinderSDK::with_config(ClientConfig {
        api_key: "your-api-key-here".to_string(),
        base_url: "https://api.cufinder.io/v2".to_string(),
        timeout: Duration::from_secs(60),
        max_retries: 3,
    })?;
    
    Ok(())
}

let result = sdk.rel("iain.mckenzie@stripe.com").await?;
println!("{:?}", result);

Person Enrichment

Enrich a person with full contact data.

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Person Search

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