API Endpoints & Routing

Explore MailCheck API's core validation endpoints powered by our global edge network. All routes require standard RapidAPI authentication headers for request signing and rate limit tracking.

POSTsub-100ms latency

/v1/check

Single Email Validation. Real-time syntax check, MX record validation, and advanced disposable email detection.

View Docs / Test

POST

/v1/bulk

Batch Verification. High-throughput user database scrubbing. Supports up to 50,000 records per call.

Required Parameteremails array

View Docs

GET

/v1/domain

Domain Health Check. DNS/MX cache inspection and reputation scoring for specific mail servers.

Query Parameterdomain

View Docs

Authentication Protocol

FadSync utilizes the RapidAPI Gateway for high-performance authentication. Include your unique API Key and the target host in every request header. Unauthorized requests will be rejected with a 403 Forbidden status.

X-RapidAPI-Key

Your personal identification token.

X-RapidAPI-Host

fadsync-validation.p.rapidapi.com

HTTP Request Headers

HTTP
GET /v1/domain?domain=gmail.com HTTP/1.1
Host: fadsync-validation.p.rapidapi.com
X-RapidAPI-Key: YOUR_API_KEY_HERE
X-RapidAPI-Host: fadsync-validation.p.rapidapi.com