ToolVet
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Voice Synthesis

by x402.forgemesh.io in Documents & files

x402 APIPassing, checked 3 h ago

Voice synthesis API: converts written text (up to 2000 characters) into a natural-sounding spoken-word audio file, delivered as base64 WAV with a choice of five male and five female voice presets. No account or third-party key required, and text is never retained. Suited for voice assistants, IVR prompts, and turning written notifications into audio.

POST https://x402.forgemesh.io/voice-synthesis

Last 30 days

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Status and outage history · Atom feed

Uptime
100%
Response time
389 ms typical, 478 ms slowest 5%
Last check
3 h ago
Next check
any minute now

How to call it

POST https://x402.forgemesh.io/voice-synthesis

Each call costs $0.01 in USDC on Base, paid with the request over x402.

Run a free test callOne unpaid request, the way an agent sends it. You see the payment challenge it gets back. Nothing is charged.

Example request

From the listing.

POST https://x402.forgemesh.io/voice-synthesis
content-type: application/json

{
  "text": "Hello from the ForgeMesh utility grid.",
  "voice": "F1"
}

Parameters

ParameterTypeRequiredDescription
textstringYesText to speak, max 2000 chars
voicestringNoVoice id, e.g. F1, M1 (default F1)

Example response

The provider's example. We can't check it without paying.

{
  "audio_base64": "UklGRiQAAABXQVZF...",
  "characters": 38,
  "content_type": "audio/wav",
  "voice": "F1"
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.01.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://x402.forgemesh.io/voice-synthesis' \
  -H 'content-type: application/json' \
  --data-raw '{"text":"Hello from the ForgeMesh utility grid.","voice":"F1"}'

# x402 v2 sends the challenge base64-encoded in the PAYMENT-REQUIRED header (v1 sends it in the body).
# To read the header:
curl -sS -g -o /dev/null -D - -X POST 'https://x402.forgemesh.io/voice-synthesis' \
  -H 'content-type: application/json' \
  --data-raw '{"text":"Hello from the ForgeMesh utility grid.","voice":"F1"}' \
  | grep -i '^payment-required:' | cut -d' ' -f2 | tr -d '\r' | base64 --decode
JavaScript: pay and call
// npm i @x402/fetch @x402/evm viem
import { wrapFetchWithPayment, x402Client } from "@x402/fetch";
import { registerExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

// Pays at most $0.01 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.01" });
registerExactEvmScheme(client, { signer: privateKeyToAccount(process.env.EVM_PRIVATE_KEY) });
const pay = wrapFetchWithPayment(fetch, client);

// Not sure it's safe to pay? ToolVet checks it first for $0.005. Pay for that from a separate
// client: this one is capped at $0.01 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fx402.forgemesh.io%2Fvoice-synthesis&method=POST
const res = await pay("https://x402.forgemesh.io/voice-synthesis", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "text": "Hello from the ForgeMesh utility grid.",
    "voice": "F1"
  }),
});
console.log(res.status, await res.text());
Python: pay and call
# pip install "x402[requests,evm]"
import os
from eth_account import Account
from x402 import x402ClientSync
from x402.http.clients import x402_requests
from x402.mechanisms.evm import EthAccountSigner
from x402.mechanisms.evm.exact.register import register_exact_evm_client

# Pays at most $0.01 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.01"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://x402.forgemesh.io/voice-synthesis",
        json={
            "text": "Hello from the ForgeMesh utility grid.",
            "voice": "F1",
        },
    )
    print(res.status_code, res.text)

Security scan

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