Generate high-fidelity expressive speech for $0.08 USDC

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.

Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.

Endpoint

POST https://api.delx.ai/api/v1/x402/speech-hd

Our checks, last 30 days

Example input (from the provider)

{
  "body": {
    "emotion": "happy",
    "language": "English",
    "pitch": 0,
    "speed": 1,
    "text": "Your autonomous agent completed the mission successfully.",
    "voice": "English_CaptivatingStoryteller"
  },
  "bodyType": "json",
  "method": "POST",
  "type": "http"
}

Promised output schema (from the provider)

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "properties": {
    "input": {
      "additionalProperties": false,
      "properties": {
        "body": {
          "additionalProperties": false,
          "anyOf": [
            {
              "required": [
                "text"
              ]
            },
            {
              "required": [
                "input"
              ]
            }
          ],
          "properties": {
            "emotion": {
              "default": "auto",
              "enum": [
                "auto",
                "happy",
                "sad",
                "angry",
                "fearful",
                "disgusted",
                "surprised",
                "neutral"
              ],
              "type": "string"
            },
            "input": {
              "description": "Alias for text; the UTF-8 encoding must not exceed 500 bytes.",
              "maxLength": 500,
              "minLength": 1,
              "type": "string",
              "x-maxUtf8Bytes": 500
            },
            "language": {
              "default": "Automatic",
              "enum": [
                "Automatic",
                "English",
                "French",
                "German",
                "Italian",
                "Japanese",
                "Korean",
                "Portuguese",
                "Spanish"
              ],
              "type": "string"
            },
            "pitch": {
              "default": 0,
              "maximum": 12,
              "minimum": -12,
              "type": "integer"
            },
            "speed": {
              "default": 1,
              "maximum": 2,
              "minimum": 0.5,
              "type": "number"
            },
            "text": {
              "description": "Text to synthesize; the UTF-8 encoding must not exceed 500 bytes.",
              "maxLength": 500,
              "minLength": 1,
              "type": "string",
              "x-maxUtf8Bytes": 500
            },
            "voice": {
              "default": "English_Wiselady",
              "enum": [
                "English_Wiselady",
                "English_Deep-VoicedGentleman",
                "English_CaptivatingStoryteller",
                "Portuguese_Wiselady",
                "Portuguese_Deep-VoicedGentleman",
                "Portuguese_CaptivatingStoryteller",
                "Portuguese_Narrator",
                "Spanish_Wiselady",
                "Spanish_Deep-tonedMan",
                "Spanish_CaptivatingStoryteller",
                "Spanish_Narrator"
              ],
              "type": "string"
            }
          },
          "type": "object"
        },
        "bodyType": {
          "enum": [
            "json",
            "form-data",
            "text"
          ],
          "type": "string"
        },
        "method": {
          "enum": [
            "POST",
            "PUT",
            "PATCH"
          ],
          "type": "string"
        },
        "type": {
          "const": "http",
          "type": "string"
        }
      },
      "required": [
        "type",
        "bodyType",
        "body"
      ],
      "type": "object"
    },
    "output": {
      "properties": {
        "example": {
          "audio_url": "https://api.delx.ai/api/v1/generated-audio-hd/7de36cd5f5f34ef8a28904b9b5985f60.wav",
          "bytes": 588252,
          "channels": 1,
          "duration_ms": 9172,
          "emotion": "happy",
          "generation_id": "7de36cd5f5f34ef8a28904b9b5985f60",
          "gross_margin_usd": 0.067,
          "input_tokens": 130,
          "language": "English",
          "media_type": "audio/wav",
          "model": "minimax/speech-02-hd",
          "pitch": 0,
          "provider": "replicate",
          "provider_attempts": 1,
          "sale_price_usdc": 0.08,
          "sample_rate_hz": 32000,
          "sample_width_bits": 16,
          "sha256": "7ded32df89c15e721f6e997931b3ee28d40a89635fe35d91b5a496712e95bead",
          "speed": 1,
          "upstream_cost_usd": 0.013,
          "voice": "English_CaptivatingStoryteller"
        },
        "type": {
          "const": "json",
          "type": "string"
        }
      },
      "required": [
        "type",
        "example"
      ],
      "type": "object"
    }
  },
  "required": [
    "input",
    "output"
  ],
  "type": "object"
}

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