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AuthFlame is a signup protection API. Send an email address on account creation, and AuthFlame returns a risk score, a suggested action, and structured signals (canonical normalization, entropy, MX, disposable status) in a single low-latency HTTP request.

Quickstart

Make your first email check in under two minutes.

How it works

Learn what happens between the request and the decision.

API reference

Explore endpoints, request bodies, and response schemas.

Authentication

Get an API key and start authenticating requests.

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Why AuthFlame

Instant signup intelligence

Low global latency keeps signups feeling instant.

Canonical normalization

Strips +tags and dot variants to catch duplicate Gmail and Outlook signups.

Entropy analysis

Shannon entropy on the local part flags randomly generated bot addresses to prevent them signing up.

MX and disposable checks

Live DNS lookups and 15,000+ tracked disposable domains stop temporary inboxes.

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Start integrating

1

Create an account

Sign up at authflame.com/register and grab your API key.
2

Send your first check

Follow the Quickstart to make a request and read the response.
3

Wire the decision into signup

Use the summary.action field to allow or block the signup.