Echo
Structured message relay MCP server with schema validation for emitting typed payloads from AI agents.
Echo is a lightweight MCP server that enables AI agents to emit structured, schema-validated messages through tool call returns. It exposes three tools — list_schemas, get_schema, and echo — for discovering schemas, retrieving their definitions, and validating payloads using JSON Schema and Zod validation.
Source
Repository: https://github.com/zenlixai/echo-mcp
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