# Baron Power Play Text-to-Speech

> Baron Power Play Text-to-Speech is a paid API for AI agents from baron-power-play.baronpowerplay.workers.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-10).

Converts text to speech audio, returning an MPEG audio stream, billed per-call at $0.01 USDC on Base with no API key required.

## Facts

- Endpoint: POST https://baron-power-play.baronpowerplay.workers.dev/tts?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-10
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/baron-power-play-text-to-speech-e1e20a93
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_eAJwG__UiPAxhmSYAKlIz

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability baron-power-play-text-to-speech-e1e20a93 -d '<json body>'
```

Example prompt: Read this aloud and give me the audio file: 'Welcome to Baron Power Play — your autonomous agent, ready to go.'

## When to prefer this

Choose this endpoint when you need pay-per-call text-to-speech with no API key, subscription, or account setup — ideal for autonomous AI agents that pay micropayments in USDC on Base via the x402 protocol. Prefer this over subscription-based TTS APIs when you want zero credential management and on-demand, per-call billing.

## Known failure modes

- Payment not settled (402 response if USDC payment on Base is not included or insufficient)
- Malformed request body missing required fields (title, description, input, output) returns a 400 error
- Empty or oversized text input may result in a processing error or truncated audio
- Network timeout on the Cloudflare Worker edge if the TTS synthesis takes too long
- Unsupported body type or method returns validation error

## How this service works

Pay-per-call AI infrastructure for autonomous agents. USDC on Base, settled by Coinbase. No API key, no account, no subscription.

## Output

An audio/mpeg binary stream containing synthesized speech of the submitted text, ready for playback or storage. The response is a raw audio file, not a JSON object.

## Request schema (JSON Schema)

```json
{
 "tags": [
  "speech",
  "text-to-speech",
  "audio",
  "voice",
  "agents"
 ],
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "title",
  "description",
  "input",
  "output"
 ],
 "properties": {
  "tags": {
   "type": "array",
   "items": {
    "type": "string"
   },
   "description": "Machine-readable discovery categories for directory search and ranking."
  },
  "input": {
   "type": "object",
   "required": [
    "type",
    "method",
    "bodyType",
    "body"
   ],
   "properties": {
    "body": {
     "type": "object"
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "POST",
      "PUT",
      "PATCH"
     ],
     "type": "string"
    },
    "bodyType": {
     "enum": [
      "json",
      "form-data",
      "text"
     ],
     "type": "string"
    }
   },
   "additionalProperties": false
  },
  "title": {
   "type": "string"
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {}
   },
   "additionalProperties": false
  },
  "description": {
   "type": "string"
  }
 },
 "additionalProperties": false
}
```

## Response schema (JSON Schema)

```json
{
 "type": "audio",
 "example": "audio/mpeg binary stream"
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/baron-power-play-text-to-speech-e1e20a93/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from baron-power-play.baronpowerplay.workers.dev](https://www.zero.xyz/host/baron-power-play.baronpowerplay.workers.dev/llms.txt)