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Relaybase is an email validation API that checks whether an email address is real and deliverable before you send to it catching typos, disposable domains, role-based addresses, and undeliverable mailboxes before they hurt your sender reputation and bounce rate.

Quickstart

Make your first API request in a few minutes.

Validate an Email

See the full single-validation request and response reference.

Validation Results

Understand how Relaybase classifies and scores an email.

Plans & Usage

See what’s included on each plan.

Go SDK

Use the official Go client instead of calling the HTTP API directly.

Node.js SDK

Use the official Node.js/TypeScript client instead of calling the HTTP API directly.

PHP SDK

Use the official PHP client instead of calling the HTTP API directly.

Python SDK

Use the official Python client instead of calling the HTTP API directly.