API Reference Overview

Base URL

https://api.datalinkapis.com

Request format

All endpoints use POST with a JSON body and Bearer token authentication.

curl -X POST https://api.datalinkapis.com/v1/{endpoint} \
  -H "Authorization: Bearer dl_live_YOUR_KEY" \
  -H "Content-Type: application/json" \
  -d '{ ... }'

Endpoints

Core endpoints

Endpoint	Description	Credits
`POST /v1/email`	Email syntax, MX, and SMTP validation	1
`POST /v1/ip`	IP geolocation and proxy detection	1
`POST /v1/phone`	Phone carrier and HLR lookup	2
`POST /v1/domain`	Domain WHOIS, DNS, and safety score	2

Bundle endpoints

Bundle endpoints charge dynamically based on the fields you include — you only pay for the lookups you request.

Endpoint	Description	Credits
`POST /v1/deliverability`	Deep email deliverability check	up to 3
`POST /v1/contact-intel`	Email + Phone + Domain + IP combined	up to 4
`POST /v1/fraud-signals`	Email + Phone + IP — composite fraud risk score	up to 4

Common fields in every response

Field	Type	Description
`credits_used`	integer	Credits deducted for this request

Try it live

Use the API Playground to fire real requests against all endpoints without writing any code.

Overview

Core Endpoints

Bundle Endpoints

Base URL

Request format

Endpoints

Core endpoints

Bundle endpoints

Common fields in every response

Try it live

​Base URL

​Request format

​Endpoints

​Core endpoints

​Bundle endpoints

​Common fields in every response

​Try it live

Base URL

Request format

Endpoints

Core endpoints

Bundle endpoints

Common fields in every response

Try it live