Block spam calls with our Caller ID API
Protect your brand, customer trust, stop spam, fraud and robocalls with our enterprise spam call blocking API
Trusted by reputable Companies

Phone number spam detection
Make your business stand out by using our phone number spam detection API, covering 27 countries. Our API helps businesses:
- Increase customer answer rates by up to 65% with phone intelligence
- Reduce fraud losses by identifying and blocking scam calls
- Improve customer experience with verified business identity
- Protect brand reputation from number spoofing attacks
96% Coverage
Across 27 countries
100% White Label
Resell and make profits
Detect spam calls and robocalls fast
Stop wasting time on calls that immediately drop or spam phone ads, which waste your customers' time. Focus on serving your customers instead of fighting with spam. Integrate CallerAPI, just use our templates
API integration
Flexible and scalable
No-code automation
Zapier, pipedream...
Carrier networks
Call screening
And more...
3 more integrations


Telecom fraud prevention at scale
It's tiring to see non-existent or temporary phone numbers on your service, I know. We got you covered, you can integrate CallerAPI, block the fraudulent actors and never miss a real customer.
- CallerAPI can handle millions of requests per day
- 10x cheaper than the competition, whilst 3x richer in information
- ~15k spam callers reported daily, updated every 5 minutes
- Average request to response time is 0.5 seconds
- Coverage of 27 countries
Best price on the market
Premium
$99/mo
- 20,000 API calls/month
- Everything in Basic
- Priority support
- Access to Beta testing
Enterprise
$997/pay-per-use
- 250,000+ API calls
- Everything in Premium
- Scalable pricing
- KYC API
What our customers say
"Glad to be working with the CallerAPI team! Excited to be making this a reality on a global scale!"

Gideon Ebose
Co-Founder, Rulebase (YC F24)
"Choosing CallerAPI was a big upgrade to our phone fraud prevention system. We've seen a 40% increase in accuracy"

Victor Saldarriaga
CTO, Vertical Technologies
Caller ID API questions
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