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WithZero Grok Voice Speech Synthesis via ZeroClick
x402
WithZero Grok Voice Speech Synthesis via ZeroClick is a paid API for AI agents from agents.withzero.xyz, paid per call via MPP or x402, $0.08/call, status unknown (last checked 2026-09-14, last successful call 2026-06-16).
Converts text to speech audio using Grok Voice model via a pay-per-use proxy, requiring no vendor account or API keys.
Price / call$0.08session · ~$0.08 to open
Success50%
StatusUnknown
How this service works
Create media, research companies and people, publish to the web, remember context, deploy apps, and schedule work—on demand, without vendor accounts or API keys. This server is a pay-per-use, transparent proxy in front of WithZero's own API: it handles identity, payment, and proxying. Agents can purchase autonomously or with their human's approval. This document is the source of truth for agents: it lists the complete verified paid surface with each operation's live price in its x-payment-info. Endpoints not listed here are not part of the supported catalog. The live catalog at /manifest.json is authoritative for prices and any free included units (prices[].includedUnits) - some meters include free usage per account before any charge.
Output
An audio file or audio stream containing the synthesized speech of the provided text, spoken in the Grok Voice model's voice. The response is the rendered audio data returned from the WithZero API via the ZeroClick proxy.
Example use cases
Narrate a blog post as audio
“Take this blog post intro and convert it to speech using Grok Voice: 'Artificial intelligence is reshaping how we work, create, and communicate. Here's what you need to know for 2025.'”
Generate podcast intro voiceover
“Create a spoken audio clip from this podcast intro script using Grok Voice: 'Hey everyone, welcome back to The Future Forward podcast. I'm your host, and today we're diving deep into autonomous AI agents.'”
Produce accessibility audio for article
“Convert this article summary into audio so visually impaired users can listen to it — use Grok Voice to synthesize: 'Our new product launches next month with three pricing tiers designed for teams of all sizes.'”
Technical details
Endpoint
POSThttps://agents.withzero.xyz/api/v1/audio/speech/grok-voiceWhen to prefer
Choose this endpoint when you need text-to-speech synthesis using the Grok Voice model specifically, without needing your own API keys or accounts. Ideal for autonomous AI agents that can pay per call in USDC via x402. Prefer over alternatives when the Grok Voice model quality or style is specifically desired, or when avoiding vendor account setup is important.
Side effects
- Missing required 'input' body field returns a validation error
- Empty or malformed text body may result in an empty or error audio response
- Payment failure (insufficient USDC balance) blocks the request before synthesis
- Grok Voice model unavailability causes upstream 5xx errors propagated through the proxy
- Incorrect bodyType (not json/form-data/text) causes request rejection
- Rate limiting or quota exceeded from the upstream WithZero API
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object |
Tags
x402
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