Knock API
knock.app
Provides notification infrastructure for sending cross-channel product and customer messaging including in-app, email, push, SMS, and chat notifications via API.
The Knock API API uses api key authentication; has freemium pricing; offers a free tier (Developer plan free ($0/mo): 10K messages, 500 guide active users, 500 AI agent credits). Verified 2026-07-13 with per-field source links.
Base URL
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no sourceFree tier
Developer plan free ($0/mo): 10K messages, 500 guide active users, 500 AI agent credits
knock.app ↗Pricing
Developer $0/mo (10K messages); Starter $250/mo (50K messages, then $.005/message); Enterprise contact sales for volume-based pricing
knock.app ↗Rate limits
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no sourceOpenAPI spec
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no sourceMCP server
Knock MCP server available to make Knock accessible to LLMs and AI agents via tool calling
docs.knock.app ↗