Phone & Calling APIs for AI Agents
Scale your outbound without hiring more SDRs. These APIs give your agent access to power dialers, voice bots, call recording, and SMS automation.
| Tool | API | Auth | SDKs | Webhooks | Free Tier | MCP |
|---|---|---|---|---|---|---|
| Bland AI Hyper-realistic AI phone agents for automated calling. | REST | API Key | — | MCP | ||
| Five9 Enterprise cloud contact center with robust APIs and SDKs. | REST | OAuth2API Key | JavaJavaScriptPython | |||
| FreJun AI-driven business phone system with developer APIs. | REST | API Key | — | |||
| GetVocal AI Conversational voice AI for automated calling and agent actions. | REST | API Key | — | |||
| Koncert AI-powered sales dialer for multi-line and power dialing at scale. | REST | API Key | — | |||
| Orum AI-powered live conversation platform for outbound sales teams. | REST | API Key | — | |||
| PhoneBurner Power dialer for sales teams to increase answer rates and live conversations. | REST | API Key | — | |||
| ElevenLabs Advanced AI audio platform for realistic text-to-speech and voice agents. | RESTWebSocket | API Key | — | |||
| Aloware Modern contact center and sales dialer platform for high-performance teams. | REST | API Key | — | |||
| Cresta Real-time AI coaching and intelligence for contact centers. | REST | API Key | — | |||
| Frontspin Cloud-based sales dialer and engagement platform for high-volume outreach. | REST | API Key | — | |||
| Regal Outbound sales platform for high-engagement voice and SMS outreach. | REST | API Key | — | |||
| CloudTalk Cloud-based phone system for sales and support teams with AI features. | REST | API Key | — | |||
| VanillaSoft Lead management and sales engagement platform with automated dialing. | REST | API Key | — | |||
| JustCall Cloud phone system for sales and support teams with deep CRM integrations. | REST | API Key | Node.jsPythonPHP | MCP | ||
| Vapi Developer platform for building voice AI agents. | REST | Bearer Token | PythonNode.js | MCP |