Grok TTS via Locus x402

Name: Grok TTS via Locus x402
Price: 0.001 USD

x402

Grok TTS via Locus x402 is a paid API for AI agents from grok.x402.paywithlocus.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-13).

Converts text to speech using xAI's Grok models, with multiple voices, language support, and inline speech tags, billed per-call via x402 micropayment.

Price / call$0.001

Seller volume →—

Success—

StatusUnknown

How this service works

Locus public pay-per-use API

Output

Returns a JSON object with a data field containing the synthesized audio (or a reference/URL to it), a payment confirmation showing 0.001 USDC settled, a request ID and status URL for tracking, and a success flag.

Example use cases

Podcast intro narration

“Turn this script into speech using the 'leo' authoritative voice in English, output as MP3: 'Good morning, listeners. [pause] Today we explore the future of artificial intelligence.'”

Multilingual customer greeting

“Synthesize this French greeting as audio using the 'eve' voice: 'Bonjour et bienvenue! Nous sommes ravis de vous accueillir.' — use BCP-47 code 'fr' and give me a WAV file.”

Expressive story narration with whisper effect

“Convert this story excerpt to speech with the 'sal' smooth voice: 'The door creaked open slowly. <whisper>Something was waiting inside.</whisper> [pause] She stepped forward.' — output as MP3.”

Technical details

Endpoint

POSThttps://grok.x402.paywithlocus.com/grok/tts

When to prefer

Choose this endpoint when you need high-quality AI speech synthesis with multiple expressive voice options, multilingual support, and inline speech markup (pauses, laughs, whispers), especially in contexts where micropayment-per-call via x402/USDC is preferred over subscription billing. Prefer it over generic TTS APIs when you want access to xAI's Grok voice models specifically, or when building agent workflows that need pay-as-you-go audio generation without API key management overhead.

Side effects

Text exceeds 15,000 character limit — request rejected
Invalid BCP-47 language code — may fall back to auto-detection or return error
Unknown voice_id value — defaults to 'eve' or returns validation error
Unsupported audio codec or sample rate in output_format — format error
Payment failure or insufficient USDC balance — x402 payment rejected
Service unavailable or xAI backend error — non-200 response

Input

Schema · Request body

Field	Type	Description
text	string
language	string
voice_id	string
output_format	object

Output

Schema · Response

{
  "type": "json",
  "example": {
    "data": {},
    "payment": {
      "scheme": "exact",
      "settledUsdc": "0.001000",
      "authorizedMaxUsdc": "0.001000"
    },
    "request": {
      "id": "00000000-0000-4000-8000-000000000000",
      "statusUrl": "/requests/00000000-0000-4000-8000-000000000000"
    },
    "success": true
  }
}

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Example use cases

Podcast intro narration

“Turn this script into speech using the 'leo' authoritative voice in English, output as MP3: 'Good morning, listeners. [pause] Today we explore the future of artificial intelligence.'”

Multilingual customer greeting

“Synthesize this French greeting as audio using the 'eve' voice: 'Bonjour et bienvenue! Nous sommes ravis de vous accueillir.' — use BCP-47 code 'fr' and give me a WAV file.”

Expressive story narration with whisper effect

Technical details

Endpoint

POSThttps://grok.x402.paywithlocus.com/grok/tts

When to prefer

Side effects

Text exceeds 15,000 character limit — request rejected
Invalid BCP-47 language code — may fall back to auto-detection or return error
Unknown voice_id value — defaults to 'eve' or returns validation error
Unsupported audio codec or sample rate in output_format — format error
Payment failure or insufficient USDC balance — x402 payment rejected
Service unavailable or xAI backend error — non-200 response

Input

Schema · Request body

Field	Type	Description
text	string
language	string
voice_id	string
output_format	object

Output

Schema · Response

{
  "type": "json",
  "example": {
    "data": {},
    "payment": {
      "scheme": "exact",
      "settledUsdc": "0.001000",
      "authorizedMaxUsdc": "0.001000"
    },
    "request": {
      "id": "00000000-0000-4000-8000-000000000000",
      "statusUrl": "/requests/00000000-0000-4000-8000-000000000000"
    },
    "success": true
  }
}