Voip Bandwidth

{
  "asOf": "2026-10-11T14:45:33.121Z",
  "calls": 10,
  "callsPerMbps": 11.468,
  "codec": "g711",
  "codecBitrateKbps": 64,
  "codecDescription": "G.711 PCMU/PCMA, 64 kbps",
  "degraded": false,
  "disclaimer": "Screening signal computed from the named public source. Not financial, legal or investment advice; provided as is. Verify at the source before acting.",
  "frameBytes": 218,
  "headerBytesIpUdpRtp": 40,
  "ipKbpsPerCall": 80,
  "ipPacketBytes": 200,
  "layer2HeaderBytes": 18,
  "linkKbpsPerCall": 87.2,
  "notChecked": [
    "RTCP (adds roughly 5% of media bandwidth), SRTP authentication tags (4 to 10 bytes), and SIP signalling",
    "silence suppression and VAD, which lower the average",
    "…3 more"
  ],
  "overheadPercent": 26.61,
  "packetsPerSecond": 50,
  "payloadBytes": 160,
  "ptimeMs": 20,
  "reasons": [
    "Each packet carries 160 payload bytes plus 40 bytes of IP/UDP/RTP header and 18 bytes of link header; 50 packets per second.",
    "Calls are full duplex: the figure applies in each direction."
  ],
  "source": "RTP (RFC 3550) 12-byte header over UDP 8 and IP 20 or 40; codec bitrates per ITU-T G.711, G.722, G.726, G.729; computed locally",
  "summary": "g711 at 20 ms: 160-byte payload, 80 kbps at the IP level, 87.2 kbps on ethernet; 10 calls need 872 kbps each way.",
  "totalIpKbps": 800,
  "totalLinkKbps": 872,
  "totalLinkMbps": 0.872,
  "verdict": "COMPUTED",
  "warning": null
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://network-calc.x402tookit.com/voip-bandwidth?calls=10&codec=g711&ipVersion=4&layer2=ethernet&ptimeMs=20'

# 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 - 'https://network-calc.x402tookit.com/voip-bandwidth?calls=10&codec=g711&ipVersion=4&layer2=ethernet&ptimeMs=20' \
  | grep -i '^payment-required:' | cut -d' ' -f2 | tr -d '\r' | base64 --decode

// 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 $0.02 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.02" });
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 $0.02 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fnetwork-calc.x402tookit.com%2Fvoip-bandwidth
const res = await pay("https://network-calc.x402tookit.com/voip-bandwidth?calls=10&codec=g711&ipVersion=4&layer2=ethernet&ptimeMs=20");
console.log(res.status, await res.text());

# 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 $0.02 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.02"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.get("https://network-calc.x402tookit.com/voip-bandwidth?calls=10&codec=g711&ipVersion=4&layer2=ethernet&ptimeMs=20")
    print(res.status_code, res.text)