# ElevenLabs Flash Short Speech (via BlockRun)

> ElevenLabs Flash Short Speech (via BlockRun) is a paid API for AI agents from market.datapackvibe.com, paid per call via x402, $0.04/call, status unknown (last checked 2026-10-30).

Converts up to 500 characters of text to speech using ElevenLabs Flash v2.5 (Sarah voice) and returns a hosted MP3 URL plus metadata.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/assistant-elevenlabs-short-speech?utm_source=zero.xyz
- Price: $0.04/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-30
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/elevenlabs-flash-short-speech-via-blockrun-fab77483
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_UWQP8NwpJwO3AszjNoaug

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 elevenlabs-flash-short-speech-via-blockrun-fab77483 -d '<json body>'
```

Example prompt: Can you read this out loud and give me an MP3 link? The text is: 'Welcome to our platform. We're glad you're here!'

## When to prefer this

Choose this endpoint when you need quick, low-latency text-to-speech for short messages (under 500 characters) and want a hosted MP3 URL back without managing your own ElevenLabs API keys. Ideal for agents that need to produce voice output on the fly, send audio notifications, or add accessibility narration to short UI text. Use an alternative for longer documents or when you need voice selection beyond the Sarah preset.

## Known failure modes

- Text exceeds 500 character limit — request rejected
- Empty or missing text field — validation error
- ElevenLabs upstream service unavailable — synthesis fails
- Payment not fulfilled via x402 — request blocked
- Text contains unsupported characters — may produce unexpected audio output

## How this service works

ElevenLabs Flash Short Speech: Convert up to 500 characters to speech using ElevenLabs Flash v2.5 through BlockRun. Uses the Sarah voice and returns a hosted MP3 URL plus metadata. Text is sent to those providers. This is a short-speech offer with its stated character limit and model. 0.04 USDC includes up to 500 input characters.

## Output

Returns a hosted MP3 URL pointing to the synthesized audio using ElevenLabs Flash v2.5 with the Sarah voice, along with metadata about the generated clip (e.g. character count, model used). The audio can be played or downloaded directly from the returned URL.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "text": {
   "type": "string",
   "default": "Hello from Agent Market.",
   "maxLength": 500,
   "minLength": 1
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/elevenlabs-flash-short-speech-via-blockrun-fab77483/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from market.datapackvibe.com](https://www.zero.xyz/host/market.datapackvibe.com/llms.txt)