Market Size

{
  "criteria": [
    "tenure=renter"
  ],
  "data_vintage": "ACS 2019-2023 5-year (2023 release)",
  "estimate_type": "OFFICIAL_CENSUS_ESTIMATE",
  "estimated_market": {
    "count": 100000,
    "display": "~100,000 households",
    "raw": 99657
  },
  "geography": {
    "display_name": "Ventura County, California",
    "geoid": "06111",
    "type": "county"
  },
  "source": {
    "label": "2023 ACS 5-year, table B25003",
    "table": "B25003",
    "universe": "Occupied housing units (households)"
  },
  "status": "OK",
  "uncertainty": {
    "display": "97,600–101,700 households",
    "label": "90% margin of error (official Census)",
    "level": 0.9,
    "lower": 97600,
    "upper": 101700
  },
  "warnings": []
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://agent-vending-production.up.railway.app/v1/market-size' \
  -H 'content-type: application/json' \
  --data-raw '{"filters":[{"operator":"==","value":"renter","variable":"tenure"}],"geography":{"name":"Ventura County","state":"CA","type":"county"},"unit":"household"}'

# 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://agent-vending-production.up.railway.app/v1/market-size' \
  -H 'content-type: application/json' \
  --data-raw '{"filters":[{"operator":"==","value":"renter","variable":"tenure"}],"geography":{"name":"Ventura County","state":"CA","type":"county"},"unit":"household"}' \
  | 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 $0.01 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%2Fagent-vending-production.up.railway.app%2Fv1%2Fmarket-size&method=POST
const res = await pay("https://agent-vending-production.up.railway.app/v1/market-size", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "filters": [
      {
        "operator": "==",
        "value": "renter",
        "variable": "tenure"
      }
    ],
    "geography": {
      "name": "Ventura County",
      "state": "CA",
      "type": "county"
    },
    "unit": "household"
  }),
});
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 $0.01 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://agent-vending-production.up.railway.app/v1/market-size",
        json={
            "filters": [
                {
                    "operator": "==",
                    "value": "renter",
                    "variable": "tenure",
                },
            ],
            "geography": {
                "name": "Ventura County",
                "state": "CA",
                "type": "county",
            },
            "unit": "household",
        },
    )
    print(res.status_code, res.text)