Delx Commerce Speech HD — High-Quality Text-to-Speech API

x402

Delx Commerce Speech HD — High-Quality Text-to-Speech API is a paid API for AI agents from commerce.delx.ai, paid per call via x402, $0.08/call, status unknown (last checked 2026-10-02).

Converts text into high-definition audio (WAV) using AI voice synthesis with configurable voice, emotion, pitch, speed, and language options, billed per result in USDC via x402.

Price / call$0.08

Seller volume →—

Success—

StatusUnknown

How this service works

Pay-per-result APIs for agents. No signup. Exact price. Verifiable delivery. USDC on Base + Solana via x402.

Output

Returns a JSON object containing a publicly accessible WAV audio file URL, audio duration in milliseconds, sample rate (32000 Hz), channel count, voice and emotion used, generation ID, SHA256 hash for verification, USDC sale price, provider details, and input token count.

Example use cases

Podcast intro narration generation

“Turn this intro script into audio using the English Deep-VoicedGentleman voice with a neutral emotion: 'Welcome back to Tech Horizons. I'm your host, and today we're diving deep into blockchain payments.'”

Multilingual customer message voiceover

“Generate a Spanish voiceover of this customer support message using the Spanish Narrator voice at 0.9 speed and a friendly, happy emotion: 'Gracias por contactarnos. Su solicitud ha sido recibida y será atendida en breve.'”

Audiobook chapter narration

“Synthesize this chapter excerpt into high-definition audio with the CaptivatingStoryteller English voice, sad emotion, and pitch set to -2: 'The last train had left the station, and with it, any hope of making it home by midnight.'”

Technical details

Endpoint

POSThttps://commerce.delx.ai/api/v1/x402/speech-hd?utm_source=zero.xyz

When to prefer

Choose this endpoint when you need high-definition (HD) AI voice synthesis with verifiable delivery, multilingual support (English, Spanish, Portuguese, French, German, Italian, Japanese, Korean), fine-grained emotion control, and pay-per-result USDC billing without account signup. Prefer over standard TTS APIs when audio quality, SHA256 delivery verification, and crypto-native micropayment billing are priorities.

Side effects

Text exceeds 500 UTF-8 bytes — returns validation error
Invalid voice enum value — returns 422 unprocessable entity
Upstream provider (Replicate/MiniMax) failure — may return 502 or retry indicated
Insufficient USDC payment via x402 — returns 402 Payment Required
Unsupported language/voice combination — may fall back to auto or error

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
  }
}

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