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Delx HD Speech Synthesis
x402
Delx HD Speech Synthesis is a paid API for AI agents from api.delx.ai, paid per call via x402, $0.08/call, status unknown (last checked 2026-10-10).
Converts text to high-definition audio using the MiniMax speech-02-hd model with configurable voice, emotion, pitch, speed, and language.
Price / call$0.08
Success—
StatusUnknown
How this service works
Generate high-fidelity expressive speech for $0.08 USDC. Call when you need English, Portuguese, or Spanish voiceover with emotion, speed, and pitch for up to 500 UTF-8 bytes—not a phone carrier or realtime session. Returns a validated 32 kHz mono WAV URL and SHA-256 receipt. No API key, no subscription.
Output
Returns a JSON object containing a URL to a hosted WAV audio file (32000 Hz, 16-bit, mono), plus metadata: generation ID, model name, voice, emotion, language, pitch, speed, duration in milliseconds, byte size, SHA256 hash, input token count, and pricing details including sale price in USDC and upstream cost.
Example use cases
Multilingual podcast intro narration
“Take this script and narrate it in Portuguese using the Portuguese Narrator voice with a neutral emotion and normal speed: 'Bem-vindo ao nosso podcast semanal sobre tecnologia e inovação.'”
Dramatic audiobook chapter read
“Generate HD audio of this passage using the English CaptivatingStoryteller voice with a sad emotion and 0.9x speed: 'The last light faded from the horizon as she realized she was truly alone.'”
Upbeat product announcement voiceover
“Create a voiceover using the English Deep-VoicedGentleman voice, happy emotion, and 1.1x speed for this text: 'Introducing our newest product — designed for the way you live today.'”
Technical details
Endpoint
POSThttps://api.delx.ai/api/v1/x402/speech-hd?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need high-definition (speech-02-hd) audio synthesis with fine-grained control over voice character, emotion, pitch, speed, and language — especially for multilingual content in English, Spanish, or Portuguese. Prefer it over standard TTS when audio quality and emotional expressiveness matter, and when per-call micropayment via x402 is acceptable.
Side effects
- Text exceeds 500 UTF-8 bytes — endpoint rejects with validation error
- Invalid voice enum value — returns schema validation error
- Speed or pitch outside allowed range — returns 400 error
- Upstream Replicate/MiniMax provider failure — returns 502 or retry-exhausted error
- Payment not provided or insufficient — x402 payment required response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| text | string | Text to synthesize; the UTF-8 encoding must not exceed 500 bytes. |
| input | string | Alias for text; the UTF-8 encoding must not exceed 500 bytes. |
| pitch | integer | |
| speed | number | |
| voice | string | |
| emotion | string | |
| language | string |
Output
Schema · Response
{
"type": "json",
"example": {
"bytes": 588252,
"model": "minimax/speech-02-hd",
"pitch": 0,
"speed": 1,
"voice": "English_CaptivatingStoryteller",
"sha256": "7ded32df89c15e721f6e997931b3ee28d40a89635fe35d91b5a496712e95bead",
"emotion": "happy",
"channels": 1,
"language": "English",
"provider": "replicate",
"audio_url": "https://api.delx.ai/api/v1/generated-audio-hd/7de36cd5f5f34ef8a28904b9b5985f60.wav",
"media_type": "audio/wav",
"duration_ms": 9172,
"input_tokens": 130,
"generation_id": "7de36cd5f5f34ef8a28904b9b5985f60",
"sample_rate_hz": 32000,
"sale_price_usdc": 0.08,
"gross_margin_usd": 0.067,
"provider_attempts": 1,
"sample_width_bits": 16,
"upstream_cost_usd": 0.013
}
}Tags
x402
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