Erlang Staffing

{
  "asOf": "2026-10-11T20:19:39.187Z",
  "blockingAtSolution": 0.007142438157899779,
  "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.",
  "mode": "b",
  "neighbours": [
    {
      "blocking": 0.0364969454723708,
      "carriedErlangs": 9.635030545276292,
      "occupancy": 0.6423353696850861,
      "trunks": 15
    },
    {
      "blocking": 0.022301872040363657,
      "carriedErlangs": 9.776981279596363,
      "occupancy": 0.6110613299747727,
      "trunks": 16
    }
  ],
  "notChecked": [
    "shrinkage: breaks, absences and training (divide by the share of time agents are actually on the phones)",
    "abandonment and retrials, which change real offered load",
    "…2 more"
  ],
  "reasons": [
    "Erlang B assumes blocked calls are cleared (lost), with no queue: B(0) = 1, B(k) = A B(k-1) / (k + A B(k-1)).",
    "Trunks needed grow more slowly than traffic: bigger groups run more efficiently."
  ],
  "source": "computed locally (Erlang B and C)",
  "summary": "10 erlangs needs 18 trunks for at most 1.00% blocking (actual 0.714%).",
  "targetBlocking": 0.01,
  "trafficErlangs": 10,
  "trunksNeeded": 18,
  "verdict": "SIZED"
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://data-calc.x402tookit.com/erlang-staffing?mode=b&targetBlocking=0.01&trafficErlangs=10'

# 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://data-calc.x402tookit.com/erlang-staffing?mode=b&targetBlocking=0.01&trafficErlangs=10' \
  | 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%2Fdata-calc.x402tookit.com%2Ferlang-staffing
const res = await pay("https://data-calc.x402tookit.com/erlang-staffing?mode=b&targetBlocking=0.01&trafficErlangs=10");
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://data-calc.x402tookit.com/erlang-staffing?mode=b&targetBlocking=0.01&trafficErlangs=10")
    print(res.status_code, res.text)