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Playground demo key · api.reefapi.com

post/email-preflight/v1/spam_score1 credit

Deterministic spam-SIGNAL score for the email content (caps ratio, image-to-text ratio, spam phrases, missing unsubscribe, raw-IP links…). HONEST: a content signal score, NOT an inbox-placement prediction; SpamAssassin/Rspamd sidecar = the calibrated upgrade (see docs). Pure local compute.

Working example

Parameters

htmlrequired

subjectoptional

text_partoptional

request preview

curl -X POST https://api.reefapi.com/email-preflight/v1/spam_score \
  -H "x-api-key: $REEF_KEY" \
  -H "content-type: application/json" \
  -d '{"html":"<p>100% FREE!!! ACT NOW — WIN CASH PRIZE</p>","subject":"FREE MONEY"}'

Hit Send to run this endpoint live.