Echo MCP v0.1.0

Echo MCP v0.1.0 is the first public source-available release.

Highlights:

• MCP stdio control plane
• REST HTTP data plane
• OpenAPI 3.0.x JSON contract validation
• Webhook-style event delivery to developer-configured endpoints
• In-memory deterministic behavior
• AI-first installation and usage documentation

Security note:
Echo MCP is intended for local development and controlled test environments. Do not expose the HTTP data plane to untrusted networks.

License:
Source-available under Elastic License 2.0. Not OSI open source.