OutboundAPI

AI Voice Agents That Work While You Sleep

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May 25, 2025 I built OutboundAPI to automate voice calls with AI — would love your feedback 🚀

Hey Indie Hackers 👋

I’m Antonio, and I’ve been building tools and startups for years — mostly around automation, AI, and operations. Recently, I started working on a problem that’s been bugging me (and many teams I’ve worked with): how painful and manual outbound calls still are.

Whether it’s chasing payments, confirming appointments, qualifying leads, or collecting survey data — most companies either burn reps on repetitive calls or skip the process entirely because it doesn’t scale.

So I built OutboundAPI — a simple API that lets you launch calls with AI voice agents. You give it a script and a phone number, and it makes the call, talks like a human, and returns the result in structured data. Think: “Zapier for voice agents.”

🔧 Use cases we’re testing:

  • Automated payment reminders

  • Lead qualification

  • Appointment confirmations

  • Voice surveys

  • Data collection (name, email, availability, etc.)

I’m super excited to help teams scale voice interactions without adding headcount. If anyone here is interested in trying it out — or just wants to chat about AI + automation — let me know! Happy to give early access and hear your thoughts.

Thanks for reading! 🙏

—Antonio

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I’ve seen firsthand how painful and inefficient outbound communication can be — whether it’s for collecting data, chasing payments, or coordinating simple tasks. Most teams either burn out reps doing repetitive work