Name: text-to-speech
Price: 0.05 USDC
Availability: InStock

$ man text-to-speech

agentutility / synthforge / text-to-speech

PRICE / CALL

$0.05

USDC · base mainnet · scheme: exact

METHOD

POST

CLUSTER

synthforge

CATEGORY

STATUS

● live

NAME

text-to-speech — generate a hosted audio url each time an updated script needs the same narrator

SYNOPSIS

POST https://x402.agentutility.ai/text-to-speech
     Content-Type: application/json
     X-PAYMENT:    <signed-transferWithAuthorization>

     { ... }

↳ first call → 402 Payment Required. Sign USDCtransferWithAuthorization, retry with theX-PAYMENT header.

DESCRIPTION

Generate a hosted audio URL each time an updated script needs the same narrator. Send up to 4,000 characters with a voice, model, speed, and mp3, wav, opus, aac, or flac format; receive audio_url, file size, content type, and the settings used. Save the selected voice settings with your script to produce another narration in the same style. The default Kokoro route uses Morpheus primary with Venice fallback and fal.ai storage. Use it as a text-to-speech API, repeatable narration API, script-to-audio service, or accessibility read-aloud.

INPUT — request schema

property	type	description	req?
text	string	Text to synthesize, up to 4,000 characters.	required
voice	string	Model-specific voice ID. Default af_sky; onyx maps to the Kokoro am_onyx voice.	optional
model	string	TTS model ID. Default tts-kokoro; the voice must be compatible with the selected model.	optional
speed	number	Playback speed from 0.25 to 4. Default 1.	optional
format	string	Audio format. Default mp3. enum: mp3 · wav · opus · aac · flac	optional

OUTPUT — response shape

field	type	description
audio_url	string	Hosted URL for the generated audio file.
file_size_bytes	integer	Generated audio file size in bytes.
content_type	string	MIME type of the hosted audio file.
format	string	Audio container returned.
voice	string	Voice ID used for synthesis.
model	string	Model used for synthesis.
speed	number	Playback speed used for synthesis.
input_chars	integer	Character count of the synthesized input.
source	string	Provider that produced the audio.

EXAMPLES — two ways to call

EXAMPLE 1 · curl

curl -X POST https://x402.agentutility.ai/text-to-speech \
  -H 'Content-Type: application/json' \
  -d '{ }'

first response = 402 Payment Required with payment requirements; sign + retry with X-PAYMENT.

EXAMPLE 2 · mcp

# Install the MCP package for this endpoint's cluster
npx -y @agentutility/mcp-<cluster>

# Required: EVM private key with USDC on Base
export X402_PRIVATE_KEY=0x...

# Then call the text-to-speech tool from your MCP-aware agent.

MCP server handles payment automatically — your coding agent just calls the tool by name.

METADATA

tags: ttsspeechaudiovoiceai
env: VENICE_API_KEY · FAL_KEY
methods: POST
cluster: synthforge
price: $0.05 USDC per call

ADJACENT — other endpoints in synthforge

endpoint	description	price
voice	Turn written text into spoken audio you can drop straight into a player or app.	$0.05
image-generate-pro	Premium text-to-image API for repeatable product, campaign, and design assets when a standard draft needs a selected model tier.	$0.06
recraft	Generates SFW design and illustration images with Venice's recraft-v4 model on a dedicated endpoint.	$0.06
seedream	Generates SFW images with Venice's seedream-v4 model on a dedicated endpoint.	$0.06
flux-2-pro	Generates SFW images with Venice's flux-2-pro model on a dedicated endpoint.	$0.04
qwen-image	Generates SFW images with Venice's qwen-image model on a dedicated endpoint.	$0.04
background-remove	Removes the background from a public image URL and returns the subject with alpha transparency.	$0.08
background-remover	Removes the background from product, portrait, and object images, returning alpha PNG foreground cutouts with optional crop-to-bounding-b…	$0.08