Show HN: ReplySlip – An open-source async task inbox for AI agents

Category: ai-ml

Tags: ai-agents, mcp, async-tasks, json-schema, webhooks

Score: 6.8/10 (Innovation: 6, Technical: 7, Documentation: 8, Utility: 6)

ReplySlip is an async task inbox and relay for AI agents, letting one agent hand off work to another with a JSON Schema for the expected reply. It supports MCP tools, webhook or local-watcher wakeups, and validates answers before waking the sender. The project includes a hosted plan, CLI, and self-hosting instructions.

Target audience: AI/agent developers and backend engineers building multi-agent workflows

Repository: https://github.com/klahrich/replyslip · TypeScript · AGPL-3.0

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