Terms of Service
Last updated: February 2026
1. Service Description
SiftlyAPI provides trust scoring for signup quality. Our API analyzes:
- ✓Email address quality and patterns
- ✓IP address geolocation and reputation
- ✓Request velocity patterns
- ✓User agent and device fingerprint
2. Acceptable Use
Use SiftlyAPI only for legitimate signup quality assessment.
You agree NOT to:
- ✕Use for malicious or fraudulent purposes
- ✕Attempt to bypass rate limits
- ✕Reverse engineer or scrape the service
- ✕Use to discriminate or violate laws
3. Rate Limits
500 requests/month
15 requests/minute
5,000 requests/month
60 requests/minute
25,000 requests/month
150 requests/minute
75,000 requests/month
300 requests/minute
Exceeding rate limits returns 429 Too Many Requests.
4. Pricing & Billing
Free
$0 forever
$29/mo
or $290/yr
$79/mo
or $790/yr
$199/mo
or $1,990/yr
Paid subscriptions via Polar. Cancel anytime.
Payment & Renewal Terms:
Subscribed plans are billed in advance on a recurring monthly or annual basis via Polar. Annual plans are billed upfront for 12 months with a 2-month discount included. Subscriptions renew automatically unless cancelled prior to the renewal date. No refunds or credits are issued for partial billing cycles. All API request quotas reset monthly on the first day of each calendar month regardless of the billing interval.
5. Limitation of Liability
⚠️ FAIL-OPEN STRATEGY
On errors, we allow signup by default (fail-open) rather than blocking legitimate users.
Service provided "as is" without warranties of any kind. We are not liable for:
- ●False positives or negatives in scoring
- ●Business losses from fraudulent signups
- ●Service downtime or errors
6. Termination
We reserve the right to suspend or terminate access if you:
- ●Violate these terms
- ●Abuse the service
- ●Use the service illegally
7. Service Level Agreement
8. Contact
Questions? Reach out at hello@siftlyapi.com