> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://docs.agentphone.ai/documentation/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://docs.agentphone.ai/_mcp/server.

# Documentation

## Docs

- [Welcome](https://docs.agentphone.ai/welcome.md): Build messaging and voice integrations with AgentPhone. Choose an API, SDK, or MCP workflow.
- [API quickstart](https://docs.agentphone.ai/quickstart.md): Create an agent and number, receive your first text, and understand what is needed to send a reply.
- [Authentication](https://docs.agentphone.ai/authentication.md): Create an API key, choose the account scope, and distinguish API, webhook, and browser-call credentials.
- [Agents](https://docs.agentphone.ai/documentation/guides/agents.md): Create and manage AI agent personas with phone numbers, voice modes, and system prompts
- [Phone numbers](https://docs.agentphone.ai/documentation/guides/phone-numbers.md): Provision, manage, and release SMS- and voice-enabled phone numbers
- [SMS registration and activation](https://docs.agentphone.ai/sms-registration.md): Register a US messaging campaign, track review, and verify that each number is ready to send.
- [Set up iMessage](https://docs.agentphone.ai/imessage.md): Purchase the right iMessage line, handle asynchronous provisioning, and send your first message.
- [Messages](https://docs.agentphone.ai/documentation/guides/messages.md): Send and receive SMS, MMS, iMessage, and WhatsApp — text, media, threaded replies, effects, reactions, and group chats
- [WhatsApp](https://docs.agentphone.ai/documentation/guides/whatsapp.md): Send and receive WhatsApp messages — templates, quote replies, buttons, list menus, link buttons, and reactions
- [RCS Business Messaging](https://docs.agentphone.ai/documentation/guides/rcs.md): Branded rich messaging to RCS-capable handsets, with automatic SMS fallback
- [Messaging Rate Limits](https://docs.agentphone.ai/documentation/reference/messaging-rate-limits.md): Daily message limits and throughput rates for SMS (10DLC) and iMessage
- [Calls](https://docs.agentphone.ai/documentation/guides/calls.md): Voice call flows, streaming responses, live transcript streaming, recordings, and call management
- [SIP trunking](https://docs.agentphone.ai/sip-trunking.md): Route calls to your own voice platform and understand SIP access and routing.
- [Webhooks](https://docs.agentphone.ai/documentation/guides/webhooks.md): Configure webhook endpoints and receive real-time event notifications
- [Testing](https://docs.agentphone.ai/documentation/reference/testing.md): Test signed webhook delivery and distinguish synthetic checks from real channel tests.
- [Code Examples](https://docs.agentphone.ai/documentation/reference/code-examples.md): End-to-end examples for common AgentPhone integrations.
- [Pagination](https://docs.agentphone.ai/documentation/reference/pagination.md): How to paginate through list endpoints in the AgentPhone API.
- [Error Handling](https://docs.agentphone.ai/documentation/reference/error-handling.md): HTTP status codes, error response format, and error handling best practices
- [Best Practices](https://docs.agentphone.ai/documentation/reference/best-practices.md): Voice latency, security, webhook reliability, and performance tips
- [Usage & Billing](https://docs.agentphone.ai/usage.md): Pay-as-you-go pricing, balance management, and usage monitoring
- [Sub-Accounts](https://docs.agentphone.ai/sub-accounts.md): Create isolated sub-accounts for separate campaigns, brands, or clients under one master account.
- [TypeScript SDK](https://docs.agentphone.ai/documentation/sdks/typescript.md): Official TypeScript/JavaScript SDK for the AgentPhone API
- [Python SDK](https://docs.agentphone.ai/documentation/sdks/python.md): Official Python SDK for the AgentPhone API
- [Troubleshooting](https://docs.agentphone.ai/troubleshooting.md): Diagnose setup, delivery, voice, billing, and account-scope problems.
- [FAQ](https://docs.agentphone.ai/documentation/reference/faq.md): Frequently asked questions about AgentPhone
- [Agent Feedback](https://docs.agentphone.ai/feedback.md): Report an API issue or documentation mismatch straight from your integration, quoting the request id of the call it is about