SiftlyAPI Docs

v1.0.0 — Trust Scoring API

Score signup quality in 10-40ms using email, IP, velocity, and user agent analysis. Detect fake signups, filter spam, and focus on converting real prospects.

10-40ms
Response Time
100%
Uptime
300+
Domain Coverage
~87.5%
Accuracy

Jump Right In

Quick Start
Get your first API call running in under 5 minutes
API Reference
Complete endpoint documentation with examples
Understanding Results
Learn how to interpret trust scores and risk levels
Pricing & Limits
Plans, rate limits, and feature comparison

How It Works

  1. 1
    Send signup data — POST your user's email, IP address, and user agent to our API endpoint.
  2. 2
    We analyze it — Our engine evaluates multiple trust signals including email reputation, IP intelligence, velocity patterns, and client fingerprint.
  3. 3
    Get a trust score — Receive a 0-100 score with a risk level (low, medium, high) in 10-40ms.

Try It Yourself

Sign up for a free account and see your own trust score in action. Experience the same analysis your users will receive.

See It In Action

Risk Levels

Low Risk70-100

Trustworthy signup — approve immediately

Medium40-69

Flag for review or require verification

High Risk0-39

Reject signup or show generic error