Contact Form Spam Protection API

Stop Contact Form Spam Without CAPTCHAs

Your contact form should collect leads, not spam. ActiveLayer checks every submission server-side in milliseconds and returns a verdict with confidence score and detection signals. No CAPTCHAs. No client-side scripts. No real messages lost. One API call in any language.

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  • Millisecond response
  • 99.5%+ accuracy
  • Zero CAPTCHAs
  • 1,000 checks free

Built by the Same Team Whose Software is Trusted by
30,000,000+ Websites Worldwide.

WPForms AIOSEO MonsterInsights OptinMonster WP Mail SMTP SeedProd

Everything Your Contact Form Needs to Beat Spam

Forget reCAPTCHA widgets, honeypot fields, and manual moderation. One API call handles all of it.

Content Analysis

ActiveLayer's AI examines message content for spam patterns, link stuffing, and gibberish text. Catches sophisticated spam that honeypots miss completely.

Email Validation

Every sender email is checked against disposable domain lists, reputation databases, and formatting rules. Fake emails are flagged before they reach your inbox.

IP Reputation Scoring

Each submission is evaluated against known spam networks, proxy lists, and geographic risk signals. Repeat offenders are caught on the first attempt.

Confidence Scores

Every verdict includes a confidence score from 0 to 1 and human-readable detection signals. You decide your own threshold for blocking vs. reviewing.

Auto-Approve and Auto-Reject

Set your spam threshold once. Submissions above it are rejected automatically. Submissions below it pass through instantly. No manual review required.

Zero Client-Side Scripts

Nothing loads in your visitors' browsers. No cookies, no tracking pixels, no JavaScript widgets. Your form stays fast and your visitors stay private.

Automatic Fallbacks

If the ActiveLayer API is ever unreachable, submissions pass through by default. Your contact form never breaks. Your users never see an error.

One Call. Any Language.

Send the submission, read the verdict, decide what happens next.

POST https://api.activelayer.com/v1/check

{ "content": form.message, "email": form.email }

verdict: "spam" · confidence: 0.98
signals: [link_farm, disposable_email]
latency: 47ms · detection_id: "al_det_8f2c41"

Eliminate Spam. Protect Every Lead.
It's That Simple.

Join the thousands of website owners, agencies, and developers who use ActiveLayer to stop spam and protect every real submission.

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  • 1,000 checks for free
  • Setup in minutes
  • No credit card required