AgentPhone
Phone numbers for AI agents — provision US and Canadian numbers, handle voice and SMS through one unified webhook, with real-time transcription and native MCP support.
About AgentPhone
AgentPhone provisions phone numbers intended for AI agents rather than people. You get US and Canadian numbers, voice and SMS through a single unified webhook, real-time transcription, and native MCP support, so an agent can be wired in without a bespoke telephony layer. The problem it targets is that giving an agent a phone line normally means assembling a carrier, a media pipeline and a transcription service yourself.
We track it, we do not run on it. We list it as the option for teams that want an agent answering or placing calls without building the plumbing underneath. The MCP support is the interesting part if you already build with agent tooling. The North America-only coverage is the constraint to check first.
Twilio is the general-purpose alternative and the right call when you need global numbers and a mature ecosystem. Vonage and Telnyx cover similar ground with different commercial and support models. Vapi and Retell sit closer to AgentPhone's intent — voice agents as a product rather than raw telephony primitives. AgentPhone is the right call for a North American agent line with minimal integration work. It is the wrong call if you need international coverage or fine-grained control over the media path. Read the terms before routing production traffic through it.
Try AgentPhone yourself.
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AgentPhone alternatives
Other AI Infrastructure tools we use alongside AgentPhone.
Mixedbread
Multimodal embedding and search APIs — state-of-the-art retrieval models, 100+ languages, sub-200ms latency, supports text, images, audio, video, and code.
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Serverless GPU cloud platform for AI inference and training — deploy endpoints, fine-tune models, and run GPU workloads with autoscaling.
View toolParallel Web Systems
Web search and research APIs built for AI agents — highest accuracy, evidence-based outputs, verifiable provenance, and SOC-II certified.
View toolOpenRouter
Unified API for LLMs — route requests across many models and providers with one key, transparent pricing, and fallbacks for production apps.
View tool
Frequently asked questions
- What is AgentPhone?
- Phone numbers for AI agents — provision US and Canadian numbers, handle voice and SMS through one unified webhook, with real-time transcription and native MCP support. AgentPhone provisions phone numbers intended for AI agents rather than people. You get US and Canadian numbers, voice and SMS through a single unified webhook, real-time transcription, and native MCP support, so an agent can be wired in without a bespoke telephony layer. The problem it targets is that giving an agent a phone line normally means assembling a carrier, a media pipeline and a transcription service yourself.
- What category does AgentPhone fall into?
- AgentPhone is a AI Infrastructure tool. Replace Works tracks it in the Tool Stack, our public catalogue of the AI tools we evaluate and ship with.
- What are the best alternatives to AgentPhone?
- The closest alternatives we track in the same AI Infrastructure category are Mixedbread, RunPod, Parallel Web Systems and OpenRouter. All of them are listed in the Replace Works Tool Stack with our notes on where each one fits.
- Does Replace Works use AgentPhone?
- AgentPhone is listed in our Tool Stack as a tool we have evaluated and recommend, but it is not currently in our day-to-day rotation.