Text to speech (audio file)

$0.003 per call · failed calls are never charged · no account or API key needed

Turn up to 1,000 characters of text into natural speech as an audio file (base64, with its content type), in English, Spanish, French, Chinese, Japanese or Korean, with MeloTTS. Use for voice replies, audio notes, accessibility and phone or chat bots.

Run it free (25 free calls) Buy credits by card (from $5) Example result (JSON)

Inputs

Name	Type	Description
`text` (required)	string	Text to speak, up to 1,000 characters
`lang`	string	Language: en, es, fr, zh, ja or ko (default en). One of: `en`, `es`, `fr`, `zh`, `ja`, `ko`.

Request

Over HTTP, with a card key from /credits:

curl -H "Authorization: Bearer adt_…" "https://agent-data-tools.revmesh2074.workers.dev/ai/speech?text=Your%20payment%20was%20received.%20Thank%20you!"

Or one of your 25 free calls, no key:

curl "https://agent-data-tools.revmesh2074.workers.dev/ai/speech?text=Your%20payment%20was%20received.%20Thank%20you!&trial=1"

Without a key, the same URL answers 402 Payment Required with x402 and MPP terms, so an agent with a wallet pays per call in USDC (Base, Polygon, Arbitrum, Monad, World Chain or Tempo) and retries.

Example result

{
  "contentType": "audio/wav",
  "audioBase64": "UklGRiTJAgBXQVZFZm10IBAAAAABAAEAgLsAAAB3AQACABAAZGF0YQ…",
  "bytes": 182630,
  "lang": "en",
  "characters": 37,
  "model": "@cf/myshell-ai/melotts"
}

From an AI agent (MCP)

Add the MCP server to Claude, Cursor or any MCP client. This tool is ai_speech, and the first 25 successful calls are free:

https://agent-data-tools.revmesh2074.workers.dev/mcp

Text to speech (audio file)

Inputs

Request

Example result

From an AI agent (MCP)

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