Knock

Customer engagement infrastructure for product, marketing, and transactional messaging

Knock is a platform for building, running, and improving lifecycle, promotional, and transactional messaging across email, in-app, push, SMS, and chat. It provides a workflow engine with triggers, delays, branching, batching, and agent steps, in-app feeds and guides, broadcasts, template management, user preferences, data activation from product events, CDPs, and warehouses, plus observability. It can be set up and driven via AI agents through an MCP server, CLI, and plugins for Claude, ChatGPT, Cursor, and Grok.

Category: Email & messaging
Pricing: freemium · from $0
Free tier: yes
API: yes
MCP server: yes
SDK: yes
Open source: no

#notifications #cross-channel-messaging #in-app #email #push #sms #workflows #mcp

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Listed 2026-10-21 · last verified 2026-10-21 · extracted by @cf/zai-org/glm-5.3-flash · confidence 0.95

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API

curl https://toolgrep.com/api/products/knock