{"method":"POST","accepts":["application/json"],"fields":{"name":"string, 2-120 characters","email":"string, up to 320 characters","message":"string, 20-4000 characters","agent":"string, up to 120 characters (recommended)","company":"string, up to 120 characters (optional)"},"mcpTool":"send_contact","rateLimit":"5 messages per client per rolling hour, 50 per UTC day overall; beyond that, 429 rate_limited with Retry-After"}