{"message":"Zaitgeist AI API","endpoints":{"/v1/chat/completions":"POST - OpenAI-compatible chat completions endpoint","/v1/contacts/upload":"POST - Upload and process files to extract contacts","/v1/contacts/merge":"POST - Merge contacts from multiple versions with deduplication","/v1/twilio/dial-callback":"POST - Twilio dial callback webhook for handling busy status","/v1/elevenlabs/personalization":"POST - ElevenLabs webhook for dynamic agent personalization","/health":"GET - Health check"}}