{"authentication":{"admin":"Basic Auth for admin endpoints","note":"API keys provide higher rate limits","type":"X-API-Key header (optional)"},"endpoints":{"/admin/dashboard":"Admin - Usage statistics dashboard","/admin/keys":"Admin - API key management","/admin/stats":"Admin - JSON statistics","/admin/stats/export":"Admin - Export stats as CSV","/coqui/models":"GET - List Coqui models","/detect-language":"POST - Detect language from text","/formats":"GET - List supported output formats","/health":"GET - Health check","/metrics":"GET - Performance metrics","/piper/delete":"POST - Delete a Piper model","/piper/download":"POST - Download a Piper model","/piper/models":"GET - List Piper models","/tts":"POST - Convert text to speech (hybrid mode)","/tts/batch":"POST - Convert multiple texts to speech","/tts/offline":"POST - Force offline TTS (Piper/Coqui)","/tts/status":"GET - Get online/offline status","/voices":"GET - List available voices","/voices/compare":"GET - Compare Edge-TTS and Piper voices","/webhooks":"GET - List webhooks","/webhooks/<id>":"DELETE - Remove webhook","/webhooks/<id>/deliveries":"GET - Get delivery logs","/webhooks/<id>/test":"POST - Test webhook"},"features":["Multi-language support","Hybrid TTS (Edge-TTS + Piper + Coqui offline fallback)","Audio effects (speed, pitch, normalization)","Multiple output formats (MP3, WAV, OGG, OPUS, FLAC)","SSML tag support","Language auto-detection","Batch processing","Webhook notifications","API Key authentication","Rate limiting"],"rate_limits":{"anonymous":{"concurrent":10,"daily":5000,"hourly":500},"api_key":"Configurable per key (default: 100/hour, 1000/day)"},"service":"TTS API","usage":{"body":{"engine":"auto","format":"mp3","normalize":true,"pitch":0,"speed":1.0,"text":"Your text here","voice":"tr_male"},"headers":{"X-API-Key":"your-api-key (optional)"},"method":"POST","response":"Audio file in specified format","url":"/tts"},"version":"5.1","webhook_events":["tts.complete","tts.failed","job.created","job.completed","api_key.created","rate_limit.hit"]}