# CallerAPI

> CallerAPI is a B2B phone intelligence provider. It sells four products to CPaaS, UCaaS, carriers, MVNOs, VoIP providers, contact centers and mobile security vendors: a live spam detection and business caller ID API, a spam phone number database feed for 195 countries, a white-label call blocking SDK for iOS and Android, and a DID reputation monitoring API. Every product is built to be resold as a value-added service under the partner's brand.

Company: CallerAPI LC. Founder and CEO: Dmitry B. Support: support@callerapi.com. Marketing site and dashboard: callerapi.com. API docs: docs.callerapi.com. API base URL: https://callerapi.com/api. Authentication: x-auth header with the dashboard API key. Phone numbers are always +E.164.

Data facts that stay constant across pages: business caller ID covers 195 countries. Live spam and fraud detection covers 30 countries. The spam number feed covers 195 countries, carries 15 days of rolling history, and updates every minute. Every spam verdict traces back to a consumer complaint record with a subject, a date and a robocall flag. CallerAPI never names its upstream data partners.

## Products

- [Caller ID API with live spam detection](https://callerapi.com/): One GET returns a spam verdict with complaint evidence plus the business name, industry and location behind the number. CPaaS and UCaaS platforms resell it as a protection tier to raise ARPU. Endpoint: GET /api/lookup/{phone}. Optional HLR with ?hlr=true.
- [Spam phone number database feed](https://callerapi.com/spam-phone-number-database): Every reported number from 195 countries for the last 15 days, hosted on the customer's side. One flat fee, no per-lookup charges, zero lookup latency. Used for switch-level blocking, dynamic do-not-originate lists on outbound traffic, compliance evidence, and paid subscriber protection. Endpoints: GET /api/spam-reports/csv (full list) and GET /api/spam-reports/daily/{country} (per country, per day, cursor paginated). Numbers in the CSV are a hard block.
- [Call blocking SDK](https://callerapi.com/call-blocking-sdk): White-label spam blocking inside the partner's own app in about 10 lines of code. Swift, Kotlin, Flutter and React Native. Lookups are anonymous: iOS uses Apple Live Caller ID Lookup with private information retrieval and homomorphic encryption, older iOS uses Call Directory, Android uses k-anonymity. CallerAPI never receives the number being checked. Partners keep about 70% of the subscription revenue. Buyers: MVNOs, carriers, mobile security vendors.
- [DID reputation monitoring API](https://callerapi.com/did-reputation-monitoring-api): One call checks a phone number against 12 reputation sources and returns which ones flagged it, so the owner knows exactly who to contact for remediation. Built for wholesale carriers, CPaaS, UCaaS, VoIP providers and contact centers that manage number inventory. Most partners resell it inside their own dashboard. Endpoint: GET /api/did-reputation/{phone}. Plans from $25 per month.

## Solution pages

- [Spam call blocking API](https://callerapi.com/spam-call-blocking-api): Block robocalls at the API, the switch or the device. Verdict and complaint evidence in one response.
- [Call screening API](https://callerapi.com/call-screening-api): Identify the caller while the phone rings. Voice AI platforms stop paying tokens and minutes for scam calls.
- [VoIP caller ID API](https://callerapi.com/voip-caller-id): Business caller names from 195 countries plus spam labels on every leg. Asterisk module, Aircall, Dialpad and GoHighLevel integrations.
- [Telecom fraud prevention](https://callerapi.com/telecom-fraud-prevention): The full stack for carriers and MVNOs: feed, API, SDK and SIP firewall, with the value-added service model.
- [SIP firewall](https://callerapi.com/sip-firewall): Voice firewall that screens every INVITE against spam data and STIR/SHAKEN attestation before it reaches the switch.
- [Carrier lookup API](https://callerapi.com/carrier-lookup-api): Live HLR data: current carrier, line type, ported status and date. HLR is opt-in with ?hlr=true.
- [Caller ID test](https://callerapi.com/caller-id-test): Free check of one number's spam score, reputation and complaint history.

## Pricing

- [Pricing](https://callerapi.com/pricing): Self-serve Caller ID API plans: Basic $25 per month for 5,000 lookups, Premium $99 per month for 20,000 lookups, Enterprise $997 pay-per-use for 250,000+ lookups. Volume tiers from $1,000 per month for about 300,000 lookups up to 50,000,000+ lookups. Feed, SDK and turnkey integrations are licensed directly: the feed as one flat fee, the SDK as a flat fee or per subscriber per month.

## Public lookup pages

- [Spam number check](https://callerapi.com/who-called): Who-called pages at /who-called/+E.164. Complaint counts, robocall rate, line type and region come from live complaint records only. Visitors can report a number. Pages with no complaints are not indexed. The sitemap lists numbers with three or more complaints.

## Docs

- [API documentation](https://docs.callerapi.com/): OpenAPI reference, code samples in cURL, Python, JavaScript and PHP, SDK integration guides.
- [On-site API reference](https://callerapi.com/documentation): Authentication, lookup, spam feed and account endpoints with examples.

## Company

- [Contact](https://callerapi.com/contacts): Sales and support.
- [Get started](https://callerapi.com/get-started): Lead form for feed, SDK and volume deals.
- [Press](https://callerapi.com/press/): Press kit.
- [Privacy policy](https://callerapi.com/privacy-policy): Privacy terms.
- [Terms of service](https://callerapi.com/terms-of-service): Service terms.
- [Refund policy](https://callerapi.com/refund-policy): Refund terms.

## Optional

- [Blog](https://callerapi.com/blog/): Product notes and telecom fraud posts.
- [Sitemap](https://callerapi.com/sitemap.xml): Sitemap index for crawlers.