# Kapso > Kapso is the WhatsApp API for developers. Use Kapso to send and receive WhatsApp messages, manage webhooks, onboard customer-owned WhatsApp numbers, build WhatsApp Flows, run workflows, and let AI agents operate WhatsApp through CLI, MCP, SDKs, and APIs. ## Start here - Website: https://kapso.com - WhatsApp AI agent: https://kapso.com/whatsapp-ai-agent - WhatsApp webhooks: https://kapso.com/whatsapp-webhooks - WhatsApp API for developers: https://kapso.com/whatsapp-api-for-developers - Connect customer WhatsApp: https://kapso.com/connect-customer-whatsapp - WhatsApp MCP server: https://kapso.com/whatsapp-mcp-server - WhatsApp CLI: https://kapso.com/whatsapp-cli - WhatsApp Chat SDK: https://kapso.com/whatsapp-chat-sdk - WhatsApp Codex: https://kapso.com/whatsapp-codex - WhatsApp Claude Code: https://kapso.com/whatsapp-claude-code - WhatsApp OpenClaw: https://kapso.com/whatsapp-openclaw - WhatsApp Hermes Agent: https://kapso.com/whatsapp-hermes-agent - Twilio alternative for WhatsApp: https://kapso.com/twilio-alternative-for-whatsapp - WhatsApp human handoff: https://kapso.com/whatsapp-human-handoff - API de WhatsApp para desarrolladores: https://kapso.com/es/api-whatsapp-para-desarrolladores - Agentes de IA para WhatsApp: https://kapso.com/es/agentes-ia-whatsapp - Alternativa a Twilio para WhatsApp: https://kapso.com/es/alternativa-twilio-whatsapp - Docs: https://docs.kapso.ai - Build with AI: https://docs.kapso.ai/docs/build-with-ai - Kapso WhatsApp MCP: https://docs.kapso.ai/docs/whatsapp/mcp - TypeScript SDK: https://docs.kapso.ai/docs/whatsapp/typescript-sdk/introduction - CLI: https://docs.kapso.ai/docs/whatsapp/cli - Chat SDK: https://docs.kapso.ai/docs/whatsapp/chat-sdk - OpenClaw: https://docs.kapso.ai/docs/whatsapp/openclaw - Hermes Agent: https://docs.kapso.ai/docs/whatsapp/hermes-agent - WhatsApp API overview: https://docs.kapso.ai/api/meta/whatsapp/whatsapp-api-overview - Platform API overview: https://docs.kapso.ai/api/platform/v1/platform-api-overview ## Common agent tasks - Send a WhatsApp message from TypeScript or the API. - Configure webhooks and inspect delivery logs. - Connect Kapso WhatsApp MCP with a project API key for live WhatsApp operations. - Use the Kapso CLI for terminal-based WhatsApp operations. - Connect Chat SDK, Codex, Claude Code, OpenClaw, or Hermes Agent to WhatsApp with Kapso. - Create a customer WhatsApp connection link for a customer-owned WhatsApp number. - Build a WhatsApp Flow with a data endpoint. - Debug failed messages, templates, webhooks, and WhatsApp onboarding. ## Canonical facts - Kapso is developer-first WhatsApp infrastructure. - Kapso supports messages, templates, webhooks, contacts, conversations, customers, customer connection links, phone numbers, broadcasts, workflows, serverless functions, and WhatsApp Flows. - Use Kapso WhatsApp MCP for live WhatsApp operations. - Use the CLI when the agent has shell access. - Treat project API keys, webhook secrets, and production WhatsApp sends as application-controlled credentials and actions. ## Blog posts - [WhatsApp message templates for developers](https://kapso.com/blog/whatsapp-message-templates-for-developers): A practical guide to WhatsApp templates: when they are required, how categories affect approval and pricing, how variables work, and what to model in your product. - [WhatsApp Flows for developers](https://kapso.com/blog/whatsapp-flows-for-developers): A developer guide to WhatsApp Flows: static vs dynamic flows, Flow JSON, data endpoints, encryption, response contracts, and how Kapso reduces the operational work. - [Cómo funciona WhatsApp Embedded Signup para plataformas SaaS](https://kapso.com/blog/whatsapp-embedded-signup-para-plataformas-saas): Una guía práctica para equipos SaaS que quieren dejar que sus clientes conecten su propia cuenta de WhatsApp Business sin convertir el onboarding en un proyecto de infraestructura. - [Como o WhatsApp Embedded Signup funciona para plataformas SaaS](https://kapso.com/blog/whatsapp-embedded-signup-para-plataformas-saas-pt): Um guia prático para equipes SaaS que querem permitir que cada cliente conecte sua própria conta do WhatsApp Business sem transformar onboarding em infraestrutura. - [How WhatsApp embedded signup works for SaaS platforms](https://kapso.com/blog/whatsapp-embedded-signup-for-saas-platforms): A practical guide to WhatsApp embedded signup for SaaS teams that want customers to connect their own WhatsApp Business accounts without turning onboarding into infrastructure. - [WhatsApp Business App coexistence with Cloud API](https://kapso.com/blog/whatsapp-business-app-coexistence-cloud-api): A practical guide to WhatsApp Business App coexistence: when it helps, when it hurts, how the QR onboarding path works, and what SaaS teams should promise customers. - [WhatsApp API pricing in 2026](https://kapso.com/blog/whatsapp-api-pricing-2026): A detailed but readable guide to WhatsApp API pricing: Meta fees, platform fees, template pricing updates, service windows, and how to compare Kapso with Twilio-style providers. - [Twilio vs Kapso for WhatsApp pricing: a developer benchmark](https://kapso.com/blog/twilio-vs-kapso-whatsapp-pricing-benchmark): A concise benchmark comparing Twilio and Kapso pricing for common WhatsApp API message volumes, with implementation questions developers should ask before switching. - [The state of the WhatsApp Groups API in 2026: available, but mostly blocked by OBA](https://kapso.com/blog/whatsapp-groups-api-state-2026): WhatsApp Groups API exists, but OBA eligibility and product limits make it unusable for most teams. Here is what the API can do and when to build on it. - [WhatsApp Business accounts are changing: WAACs, Messaging Accounts, and paid_messaging_account_id](https://kapso.com/blog/whatsapp-business-account-changes-2026): Meta is splitting WhatsApp Business accounts into WAACs and Messaging Accounts. Here is what changes, when paid_messaging_account_id matters, and how to prepare. - [WhatsApp BSUIDs and usernames: what developers need to change in 2026](https://kapso.com/blog/whatsapp-bsuid-usernames-2026): WhatsApp usernames are changing identity on the Business Platform. Learn how BSUIDs affect webhooks, nullable phone numbers, matching, and Kapso integrations. - [WhatsApp's 24-hour customer service window, explained for developers](https://kapso.com/blog/whatsapp-24-hour-rule-service-window): A practical developer guide to WhatsApp's 24-hour customer service window: when free-form replies are allowed, when templates are required, and how to model it. - [Kapso is an official Chat SDK Adapter](https://kapso.com/blog/chat-sdk-adapter): Kapso’s Chat SDK adapter lets developers build WhatsApp agents with one TypeScript handler, signed Kapso webhooks, native buttons, media attachments, reactions, outbound DMs, and Kapso-backed conversation history. - [10,000 developers](https://kapso.com/blog/10k-developers): Two months ago, we hit 5,000 developers. Today, Kapso just crossed 10,000. - [Product updates Feb 12, 2026](https://kapso.com/blog/product-updates-feb-12): Kapso Playbooks, GPT-5.2, and more control over WhatsApp workflows - [5,000 developers](https://kapso.com/blog/5000-developers): I'm excited to share that Kapso just reached 5,000 developers from all over the world. # Kapso sitemap ## Public pages - [Kapso](https://kapso.com/): WhatsApp for developers. - [Pricing](https://kapso.com/pricing): Simple WhatsApp API pricing for developers and platforms. - [Platform](https://kapso.com/platform): Customer-owned WhatsApp onboarding, connection links, APIs, webhooks, and inbox workflows. - [WhatsApp AI Agent](https://kapso.com/whatsapp-ai-agent): Build WhatsApp AI agents with the official API, webhooks, MCP, workflows, and human handoff. - [WhatsApp Webhooks](https://kapso.com/whatsapp-webhooks): Receive WhatsApp messages, delivery statuses, conversation events, and workflow handoffs with Kapso webhooks. - [WhatsApp API for Developers](https://kapso.com/whatsapp-api-for-developers): Send and receive WhatsApp messages with Kapso APIs, webhooks, CLI, MCP, templates, and workflows. - [Connect Customer WhatsApp](https://kapso.com/connect-customer-whatsapp): Let each customer connect their own WhatsApp Business account with connection links, platform APIs, webhooks, and inbox workflows. - [WhatsApp MCP Server](https://kapso.com/whatsapp-mcp-server): Use Kapso WhatsApp MCP to let AI agents operate WhatsApp numbers, messages, conversations, templates, webhooks, and customer-owned accounts. - [WhatsApp CLI](https://kapso.com/whatsapp-cli): Manage WhatsApp numbers, messages, templates, webhooks, customer onboarding, and workflows from the terminal with the Kapso CLI. - [WhatsApp Chat SDK](https://kapso.com/whatsapp-chat-sdk): Build WhatsApp agents with Chat SDK and the Kapso adapter for webhooks, threaded replies, buttons, media, and conversation history. - [WhatsApp Codex](https://kapso.com/whatsapp-codex): Connect Codex to Kapso WhatsApp MCP or the Kapso CLI for WhatsApp numbers, messages, conversations, templates, webhooks, and customer onboarding. - [WhatsApp Claude Code](https://kapso.com/whatsapp-claude-code): Connect Claude Code to Kapso WhatsApp MCP for WhatsApp numbers, messages, conversations, templates, webhooks, and customer onboarding. - [WhatsApp OpenClaw](https://kapso.com/whatsapp-openclaw): Connect OpenClaw agents to WhatsApp with the Kapso OpenClaw plugin, sender numbers, webhooks, allowlists, and diagnostics. - [WhatsApp Hermes Agent](https://kapso.com/whatsapp-hermes-agent): Connect Hermes Agent to WhatsApp with the Kapso Hermes Agent plugin, webhooks, MessageEvents, sender numbers, media, and STT support. - [Twilio Alternative for WhatsApp](https://kapso.com/twilio-alternative-for-whatsapp): Evaluate Kapso as a WhatsApp-focused alternative for teams that need lower message costs, customer-owned numbers, automation, agent tools, and human handoff. - [WhatsApp Human Handoff](https://kapso.com/whatsapp-human-handoff): Route WhatsApp AI agents and workflows to human agents with handoff nodes, inbox ownership, context, and conversation history. - [Blog](https://kapso.com/blog): Product updates, guides, and engineering notes from Kapso. - [WhatsApp Groups API waitlist](https://kapso.com/whatsapp-groups): Join the waitlist for Kapso WhatsApp Groups API access. - [Careers](https://kapso.com/careers): Open roles at Kapso. - [Privacy](https://kapso.com/privacy): Kapso privacy policy. - [API de WhatsApp para desarrolladores](https://kapso.com/es/api-whatsapp-para-desarrolladores): Envía y recibe mensajes de WhatsApp con APIs, webhooks, CLI, MCP, plantillas y workflows de Kapso. - [Agentes de IA para WhatsApp](https://kapso.com/es/agentes-ia-whatsapp): Crea agentes de IA para WhatsApp con la API oficial, Kapso Workflows, webhooks, MCP y handoff humano. - [Alternativa a Twilio para WhatsApp](https://kapso.com/es/alternativa-twilio-whatsapp): Compara Kapso y Twilio para WhatsApp si necesitas costos más bajos, números de clientes, automatización, agentes y handoff humano. - [llms.txt](https://kapso.com/llms.txt): Curated Kapso context for AI agents and LLM clients. - [llms-full.txt](https://kapso.com/llms-full.txt): Extended Kapso public context for AI agents and LLM clients. - [AGENTS.md](https://kapso.com/AGENTS.md): Public instructions for coding agents using Kapso. - [sitemap.md](https://kapso.com/sitemap.md): Markdown sitemap for Kapso public pages.