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Linkrra Pearl Pool Text-to-Speech (TTS)
x402
Linkrra Pearl Pool Text-to-Speech (TTS) is a paid API for AI agents from pool.linkrra.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-11).
Converts text input to speech audio (WAV) via an OpenAI-compatible API, paid per request in USDC on Base using the x402 payment protocol
Price / call$0.01
Success—
StatusUnknown
How this service works
OpenAI-compatible inference paid per request in USDC on Base (eip155:8453, scheme exact). GET /v1/models for the model catalogue and per-model USD prices. Every paid route answers unauthenticated requests with an x402 v2 402 challenge (PAYMENT-REQUIRED header + JSON body). Contact: weare@linkrra.com
Output
A binary WAV audio file containing the synthesized speech corresponding to the input text. The response is raw audio bytes with MIME type audio/wav, ready for playback or storage.
Example use cases
Narrate a product announcement
“Turn this product launch copy into spoken audio as a WAV: 'Introducing our new AI-powered assistant — smarter, faster, and always ready to help.' I'll use it for the promo video.”
Generate voice for a chatbot response
“My chatbot just replied with 'Your order has been shipped and will arrive by Thursday.' Can you synthesize that into a WAV audio clip so I can play it back to the user?”
Create audio from a written article
“I want to listen to this article introduction: 'The global AI market is projected to reach 1.8 trillion dollars by 2030, driven by rapid advances in language models.' Can you generate a WAV audio file of it being read aloud?”
Technical details
Endpoint
POSThttps://pool.linkrra.com/api/billing/x402/tts?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need OpenAI-compatible TTS with per-request USDC micropayments on Base (x402 protocol), especially in autonomous agent pipelines that handle crypto payments natively. It is well-suited for agents that need flexible, pay-as-you-go voice synthesis without subscription billing, and when integration with the x402 payment standard is already established.
Side effects
- 402 Payment Required — x402 challenge returned if payment header is missing or incorrect; agent must complete USDC payment on Base before retrying
- Invalid input schema — missing required fields (input.type, input.method, input.bodyType, input.body, output.type, output.mimeType) returns a validation error
- Unsupported model or voice — if the requested TTS model is unavailable in the catalogue, request may fail
- Network or inference node unavailability — decentralized GPU pool may have intermittent availability
- Malformed payment — incorrect USDC amount or wrong chain (must be Base, eip155:8453) causes payment rejection
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| outputrequired | object |
Output
Schema · Response
{
"type": "binary",
"example": "<WAV file bytes>",
"mimeType": "audio/wav"
}Tags
x402
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Zero review prompt (fires after every successful call)
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