ACCESS 10+ B2B DATA SOURCES WITH ONE API

Waterfall Email Finder API

Trade multiple API subscriptions for one API email finder platform. Discover verified work email addresses from multiple B2B data sources with one request. Realtime email verification built-in and risky emails are always free.

💡 API docs 🔑 Get a free API key

👉 Pay-as-you-Go: 1 credit = 1 verified email address. Risky emails are always free. Credits never expire. No monthly subscriptions.

$0

25 credits

Refresh Monthly

$25

⚡ 500 credits

Never expire.

$65

⚡ 2,500 credits

Never expire.

$95

⚡ 5,000 credits

Never expire.

$260

⚡ 25,000 credits

Never expire.

🤙 Message our team for larger Email Finder credit packages, volume discounts and agency plans.

Enrich prospects with verified emails - using zero code on:

API Reference

Authentication

Email Finder API

Endpoint

Required Parameters

Request

Response

Error codes

Rate limit

Email Finder API

Discover verified work email addresses from multiple B2B data sources using a single API method. Realtime email verification included and risky emails are always free.

Authentication

To successfully authenticate and make requests to the Leadfwd Email Finder API, you need to generate a Authentication Key and Secret by logging into your account and navigating to Settings > Integrations > API.


Your Authentication Key will be instantly sent to the valid email address related to your account while your secret will be accessible in the app.


Combine the Authentication Key and Secret using a period ‘.’ in-between to form a single string for your request: {authKey}.{authSecret}

Endpoint

Your {api.appDomain} host value will be based on your specific account and the endpoint URL path can be found in Settings > Integrations > API.

POST https://{api.appDomain}/v2/email-finder

Required Parameters

domain

Company domain name (string)

leadfwd.com
fname

Contact's first name (string)

John
lname

Contact's last name (string)

Doe

Request


curl --request POST \
"https://{api.appDomain}/v2/email-finder" \
--header "Authorization: Bearer {authKey}.{authSecret}
--header "Content-Type: application/json" \
--header "Accept: application/json" \
--data "{
\"domain\": \"leadfwd.com\",
\"fname\": \"John\",
\"lname\": \"Doe\"
}"

Response


'array (
'code' => 201,
'response' => 
array (
'id' => 1,
'message' => 'Success!',
'email' => 'johndoe@leadfwd.com',
'status' => 'Verified',
'credit_charged' => true,
'total_credits' => 1143,
),
)'
email

The email address discovered in our search (string)

johndoe@leadfwd.com
status

The validation status of the email address (string)

Verified Risky
credit_charged

‘true’ for verified emails and ‘false’ for risky emails (string)

true false
total_credits

Remaining email finder credit count after request (integer)

1143

Error codes

422

Unprocessable Entity. Request missing parameters or request format incorrect.

404

No Email Result. Email not found, validation failed or free email domain used.

403

No credits: Oops. Insufficient Email Finder credits.

429

Rate limit exceeded.

Rate limit

150 requests per minute. Reach our team to inquire about a higher limit.

FAQ