{"id":"91d0eba0-f3e5-4762-938e-7329bc7ed25f","shortId":"4nYTHy","kind":"mpp","title":"Convert text to natural speech using Deepgram Aura-2 TTS, paid per call via MPP/Tempo.","tagline":"Convert text to natural speech using Deepgram Aura-2 TTS, paid per call via MPP/Tempo.","description":"This endpoint provides text-to-speech synthesis powered by Deepgram's Aura-2 models, accessed through the Locus MPP (Micropayment Protocol) gateway. You send a JSON body with the text you want spoken and receive audio back in your chosen format (MP3, WAV, FLAC, Opus, AAC, and others). Multiple voice models are available in the `aura-2-{voice}-{lang}` naming scheme, including voices like thalia, apollo, and orion for English.\n\nPayment is handled per-call via the Tempo method on pathUSD. Each TTS request costs 23,000 base units of pathUSD (6 decimals), which works out to $0.023 per call. The recommended maximum input is approximately 2,000 characters per request. You can control the output encoding, container format, and sample rate to match your application's requirements.\n\nThis endpoint is part of a broader Deepgram service suite on Locus MPP that also includes audio transcription (Nova-3 STT), text analysis (sentiment, topics, intents, summarization), and a model listing endpoint. The TTS endpoint specifically accepts POST requests with a JSON body. Note that the probe returned 404 on HEAD/GET, which is expected since this is a POST-only endpoint — it is not evidence the endpoint is down.","tags":["speech-to-text","transcription","tts","audio","sentiment"],"capabilities":["text-to-speech","aura-2-tts","multi-voice","mp3-output","wav-output","flac-output","opus-output","aac-output","configurable-sample-rate","per-call-micropayment","tempo-settlement"],"categories":["audio","ai"],"synonyms":["TTS","text to speech","speech synthesis","voice generation","Deepgram TTS","Aura-2","audio generation","voice synthesis"],"warnings":["Probe returned 404 on HEAD and GET; endpoint is POST-only so 402 challenge was not captured — liveness not directly confirmed","No response schema documented; audio binary output is inferred from context","Currency address 0x20c000000000000000000000b9537d11c60e8b50 assumed to be pathUSD with 6 decimals based on Tempo convention; if different, price calculation ($0.023) may be incorrect"],"endpointUrl":"https://deepgram.mpp.paywithlocus.com/deepgram/speak","protocol":"mpp","transport":"http","auth":{"type":"mpp","details":{"realm":"deepgram.mpp.paywithlocus.com","intent":"charge","method":"tempo","service_methods":{"tempo":{"assets":["0x20c000000000000000000000b9537d11c60e8b50"],"intents":["charge"]}}}},"qualityScore":"0.620","qualityRationale":"Full OpenAPI schema with request body details and pricing is available. However, the probe returned 404 because HEAD/GET were used on a POST-only endpoint, so liveness via 402 challenge was not directly confirmed. No response schema or example response is documented. Crawled pages returned no useful 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