Introduction

OpenPhn runs real phone calls on behalf of your AI agents and returns clean, structured JSON. You describe the objective and the shape of the outcome you want; we make the call, handle voicemail and retries, and deliver a signed webhook when it's done.

What ships today

• REST API — create outbound calls, list/retrieve calls, export CSV. Batch up to 200 calls in one request.
• Inbound numbers — provisioned via a Twilio subaccount for supported use cases, with configurable greeting, flows, transfers, and post-call SMS.
• Flows — visual graph editor. Draft, preview (dry-run), publish (compile-and-freeze).
• DNC — upload a 10k-row CSV; global + per-tenant suppression enforced at call creation.
• SMS — per-number templates that fire after a call completes, with Twilio delivery-status webhooks.
• Outbound webhooks — HMAC-SHA256 signed, 3-retry backoff (5s / 30s / 120s), full delivery history API.
• MCP server — first-party Model Context Protocol server at mcp.openphn.com with four tools (make_call, get_call, list_calls, list_numbers). Bearer-authed per connection.

What this doc site covers

• Guides — concepts, how-to, compliance, troubleshooting.
• API — REST reference, authentication, webhooks, errors.
• MCP — how to hook OpenPhn into Claude Desktop, Cursor, and any other MCP-aware client.
• Changelog — releases, breaking changes, fixes.

Getting in touch

• Dashboard: app.openphn.com
• Marketing site: openphn.com
• Issues: github.com/knsgill/openphn

Ready to make a call? Jump to the quickstart.