CallerAPI

Screen every caller with AI before your team picks up

When a customer provides a phone number, your AI agent instantly verifies it through CallerAPI. Spam scores, carrier details, FTC complaint history, and HLR network status are all retrieved in seconds. Fraudulent numbers get flagged before a single callback is made. Your sales team only calls verified, real leads.

Chosen by 800+ global brands across industries

Phone intelligence at conversation speed

Your AI agent taps into CallerAPI's phone number database to verify callers, detect fraud, and enrich contact records, all during live conversations with your customers.

Verify Phone Numbers

A lead submits a callback request with their phone number. Your AI agent queries CallerAPI's Get Phone Number Information endpoint in E.164 format, retrieves reputation score and entity type, and confirms the number is legitimate before routing to sales.

Detect Spam Callers

Unknown number triggers an inbound support request. The agent pulls FTC complaint counts and spam indicators from CallerAPI instantly, flags high-risk callers for review, and protects your team from robocalls and fraud attempts.

Check HLR Network Status

Marketing needs to clean a contact list before an SMS campaign. The agent enables HLR lookup on each number, identifies which lines are active, ported, or disconnected, and removes dead numbers. Response adds just 1-3 seconds per lookup.

Retrieve Carrier Details

Compliance team needs to audit phone number origins for regulatory reporting. The agent pulls carrier name, network type, and line classification from CallerAPI, distinguishing mobile, landline, and VoIP numbers in real time.

Identify Business Callers

A vendor contacts your support line with a new business number. The agent verifies registered business name and caller type through CallerAPI, confirming the organization is legitimate before transferring the call to procurement.

Monitor API Credits

Your operations lead asks how many lookups remain this month. The agent calls Get User Information, retrieves credits spent versus monthly allocation, and reports the remaining balance, all without logging into the CallerAPI dashboard.

CallerAPI

Use Cases

Caller verification that happens automatically

See how AI agents protect your team from spam, verify leads before callbacks, and keep contact databases clean using real-time phone intelligence.

Lead Screening Before Sales Callbacks

A demo request comes in at midnight from an unfamiliar area code. Your AI Agent takes the submitted phone number, runs it through CallerAPI with HLR enabled, and discovers it has a high spam score with multiple FTC complaints. Instead of wasting a rep's morning on a fraudulent lead, the agent flags it and moves to the next qualified prospect. Your team calls real buyers first.

Real-Time Fraud Prevention in Support

A caller requests an account password reset and provides a phone number for verification. Your AI Agent queries CallerAPI before sending any codes, finds the number is classified as VoIP with recent spam reports, and escalates to your fraud team instead of completing the reset. Account takeover prevented. Customer data stays safe.

SMS Contact List Hygiene at Scale

Your marketing team is about to send 10,000 promotional texts. Your AI Agent processes each number through CallerAPI with HLR lookup, identifies 1,200 disconnected or ported numbers, and removes them from the campaign list automatically. Bounce rates drop. Carrier reputation stays intact. Campaign delivery improves across the board.

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CallerAPI

CallerAPI

FAQs

Frequently Asked Questions

What data does the AI agent retrieve when looking up a phone number?

The agent calls CallerAPI's Get Phone Number Information endpoint and receives reputation score, entity type (business or personal), carrier name, line type (mobile, landline, VoIP), spam status, and FTC complaint count. With HLR enabled, it also returns real-time network status showing whether the line is active or disconnected.

How fast is a CallerAPI phone lookup during a live conversation?

Standard lookups return in under a second. With HLR enabled for real-time network status, the response takes 1-3 additional seconds. Both are fast enough that your customer will not notice any delay while the agent verifies their number in the background.

Does the agent need phone numbers in a specific format?

Yes. CallerAPI requires E.164 format, which includes the country code prefix (for example, +16502530000 for a US number). Your AI agent can automatically convert common phone number formats to E.164 before making the lookup call.

Can I set spam score thresholds that trigger automatic actions?

Absolutely. Configure your agent with rules like 'if spam score exceeds 7, flag the lead for review' or 'if FTC complaints exceed 3, block the callback request.' The agent applies these rules in real time as CallerAPI returns data during conversations.

How much does each CallerAPI lookup cost?

CallerAPI pricing starts at $0.0039 per lookup, with plans ranging from 5,000 lookups at $25 to 250,000 lookups at $997. The agent can check your remaining credit balance by calling the Get User Information endpoint so you are never surprised by usage.

Does Tars store the phone reputation data retrieved from CallerAPI?

No. Tars queries CallerAPI in real time during conversations. Reputation scores, carrier details, and complaint records are used only to process the current request. No phone intelligence data is retained in Tars after the conversation ends.

How is this different from manually checking numbers on CallerAPI's website?

Manual lookups require you to visit the CallerAPI dashboard and enter each number one at a time. With Tars, verification happens automatically as customers provide numbers during conversations. Batch processing, automatic fraud flagging, and instant lead scoring all run without human intervention.

Can the agent verify numbers submitted through web forms and WhatsApp messages?

Yes. Regardless of the channel, whenever a customer provides a phone number, the agent can verify it through CallerAPI. Website chat, WhatsApp, SMS, or any other Tars-supported channel, the same phone intelligence is available everywhere your agent operates.

How to add Tools to your AI Agent

Supercharge your AI Agent with Tool Integrations

Don't limit your AI Agent to basic conversations. Watch how to configure and add powerful tools making your agent smarter and more functional.

Real results, real customers, real stories

“We're saving an average of 4,000+ calls a month.”
Implementing an Agent revolutionized our customer service channels and our service to Indiana business owners. We're saving an average of 4,000+ calls a month and can now provide 24x7x365 customer service️ along with our business services.
Lindsey Roark Mayes
Ex-Director of SOS IT (State of Indiana)
“Cutting down on staff needing to email back.”
Since our launch of Tars Agents, we've had more than 5k interactions with them from individuals on the website. We saw prospects interacting with the Agent regarding application timelines, tuition, curriculum, and other items that may come through an email. This provides another avenue of access to our team while cutting down on staff needing to email back.
Levi Eastwood
Marketing Director of UCI Merage School
“Powerful tool - and there's so much more still to explore!”
I love the flexibility of the TARS chatbot design tool. The ability to drop in a new gambit and easily de-link and re-link gambits before and after it saves HOURS of time lost if I had to regenerate from scratch. TARS stands out for its flexibility, consistent performance, and outstanding support.
Aaron Rittmaster
Founder
“I like the product.”
Takes those boring forms and allows you to make the collecting of customer information enjoyable for the user. It has a lot of value and I see the company constantly working on improving it.
Pierre Rattini
Director of Marketing
“Very responsive and supportive Team”
I love how supportive and responsive the team members are. The chatbots are not difficult to build once you have an idea of what you are doing, and this is so based on the backend work Tars has completed. Also, they are flexible to the clients' requests.
Keisha Cameron
Product Manager
“Easy for cooperation and open to agreement.”
One of the biggest qualities of TARS is their ability to truly understand their clients' needs. They took the time to thoroughly assess our requirements, offering valuable insights and recommendations that we hadn't even considered. This level of personalized attention made a significant difference in the success of our project.
Milica Petrovic
Customer Care Project Associate
“Great service”
The guys at Tars are so passionate about bots and maximum engagement. Tars is overall a great product with really nice people there to help me engage and automate conversations I would have otherwise missed.
Nigel Gosling
Health Coach
“Best in class for lead generation”
TARS is an essential tool within our lead gen strategy. I started to use it a couple years ago, and the platform evolved to focus on results. You can integrate your Google Analytics, Facebook Pixel, and AdWords conversion tag to track results and measure your campaign. You can also integrate with Zapier, which opens a lot of possibilities. Compared with static landing pages, we have seen an increase in conversions and more engagement.
Leonardo Wolff
Founder
“Very professional and cooperative”
Building an automated chat that our customers actually used and reduced calls amount.
Maryam Alhaddad
Customer Journey Designer
“Flexibility and good service”
Tars platform is very flexible, so you can do pretty much any flux you desire. Also integrates with any third party through APIs with a very simple and easy-to-use interface. Also tars team is great! Always at disposal and brings suggestions and solutions for any issue encountered during the process of building the chatbot.
Lucas Von Lachmann
Process Manager
“Deserved The title of the Best Chatbot of the Year”
If you are building chatbots, you cannot go wrong with TARS. I have been with this company since their beginning. Seen how they have grown. I have tested a lot of bots, but this one is still the best out there. We use WhatsApp a lot for our business. And what I like best is that I can have 1 chatbot for website and for my WhatsApp. I especially appreciate their support team as well. Whenever I am stuck, they quickly reply to my questions.
MJ Felix
Chairman
“Advanced integration, easy to use, and very customizable.”
This chatbot does everything from AI integration to complete customization and is excellent for lead conversion in most industries. I think the pre-formatted templates are an excellent boost to get started quickly. The team is also excellent.
Rachel Rowling
Chief Operating Officer
“The chatbot implementation has exceeded expectations!”
The implementation has delivered 24/7 customer support and is proving its value by reducing Contact center calls by around 5% in just four months of operation. Beyond enhancing the e-care experience, the chatbot is driving impressive business results, achieving a remarkable 20% month-on-month growth.
Victor Pereira
Customer Care and CX Manager
“We're saving an average of 4,000+ calls a month.”
Implementing an Agent revolutionized our customer service channels and our service to Indiana business owners. We're saving an average of 4,000+ calls a month and can now provide 24x7x365 customer service️ along with our business services.
Lindsey Roark Mayes
Ex-Director of SOS IT (State of Indiana)
“Cutting down on staff needing to email back.”
Since our launch of Tars Agents, we've had more than 5k interactions with them from individuals on the website. We saw prospects interacting with the Agent regarding application timelines, tuition, curriculum, and other items that may come through an email. This provides another avenue of access to our team while cutting down on staff needing to email back.
Levi Eastwood
Marketing Director of UCI Merage School
“Powerful tool - and there's so much more still to explore!”
I love the flexibility of the TARS chatbot design tool. The ability to drop in a new gambit and easily de-link and re-link gambits before and after it saves HOURS of time lost if I had to regenerate from scratch. TARS stands out for its flexibility, consistent performance, and outstanding support.
Aaron Rittmaster
Founder
“I like the product.”
Takes those boring forms and allows you to make the collecting of customer information enjoyable for the user. It has a lot of value and I see the company constantly working on improving it.
Pierre Rattini
Director of Marketing
“Very responsive and supportive Team”
I love how supportive and responsive the team members are. The chatbots are not difficult to build once you have an idea of what you are doing, and this is so based on the backend work Tars has completed. Also, they are flexible to the clients' requests.
Keisha Cameron
Product Manager
“Easy for cooperation and open to agreement.”
One of the biggest qualities of TARS is their ability to truly understand their clients' needs. They took the time to thoroughly assess our requirements, offering valuable insights and recommendations that we hadn't even considered. This level of personalized attention made a significant difference in the success of our project.
Milica Petrovic
Customer Care Project Associate
“Great service”
The guys at Tars are so passionate about bots and maximum engagement. Tars is overall a great product with really nice people there to help me engage and automate conversations I would have otherwise missed.
Nigel Gosling
Health Coach
“Best in class for lead generation”
TARS is an essential tool within our lead gen strategy. I started to use it a couple years ago, and the platform evolved to focus on results. You can integrate your Google Analytics, Facebook Pixel, and AdWords conversion tag to track results and measure your campaign. You can also integrate with Zapier, which opens a lot of possibilities. Compared with static landing pages, we have seen an increase in conversions and more engagement.
Leonardo Wolff
Founder
“Very professional and cooperative”
Building an automated chat that our customers actually used and reduced calls amount.
Maryam Alhaddad
Customer Journey Designer
“Flexibility and good service”
Tars platform is very flexible, so you can do pretty much any flux you desire. Also integrates with any third party through APIs with a very simple and easy-to-use interface. Also tars team is great! Always at disposal and brings suggestions and solutions for any issue encountered during the process of building the chatbot.
Lucas Von Lachmann
Process Manager
“Deserved The title of the Best Chatbot of the Year”
If you are building chatbots, you cannot go wrong with TARS. I have been with this company since their beginning. Seen how they have grown. I have tested a lot of bots, but this one is still the best out there. We use WhatsApp a lot for our business. And what I like best is that I can have 1 chatbot for website and for my WhatsApp. I especially appreciate their support team as well. Whenever I am stuck, they quickly reply to my questions.
MJ Felix
Chairman
“Advanced integration, easy to use, and very customizable.”
This chatbot does everything from AI integration to complete customization and is excellent for lead conversion in most industries. I think the pre-formatted templates are an excellent boost to get started quickly. The team is also excellent.
Rachel Rowling
Chief Operating Officer
“The chatbot implementation has exceeded expectations!”
The implementation has delivered 24/7 customer support and is proving its value by reducing Contact center calls by around 5% in just four months of operation. Beyond enhancing the e-care experience, the chatbot is driving impressive business results, achieving a remarkable 20% month-on-month growth.
Victor Pereira
Customer Care and CX Manager

Privacy & Security

We’ll never let you lose sleep over privacy and security concerns

At Tars, we take privacy and security very seriously. We are compliant with GDPR, ISO, SOC 2, and HIPAA.

GDPR
ISO
SOC 2
HIPAA

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