Locus Air Quality History

{
  "aqs": {
    "annualMonitorSummaries": [
      {
        "distanceKm": 1,
        "parameter": "example",
        "parameterCode": "example",
        "poc": "example",
        "pollutantStandard": "example",
        "recordId": "example",
        "siteId": "example",
        "units": "example",
        "year": -9007199254740991
      }
    ],
    "availableYears": [
      -9007199254740991
    ],
    "provenance": {
      "datasetPage": "https://example.gov/record",
      "sourceName": "example",
      "sourceUrl": "https://example.gov/record"
    }
  },
  "caveats": [
    "example"
  ],
  "cdcGapFill": {
    "filledYears": [
      -9007199254740991
    ],
    "modeledAnnualPm25": [
      {
        "countyFips5": "example",
        "countyName": "example",
        "year": -9007199254740991
      }
    ],
    "provenance": {
      "datasetPage": "https://example.gov/record",
      "sourceName": "example",
      "sourceUrl": "https://example.gov/record"
    }
  },
  "componentStatus": [
    {
      "component": "aqs_monitors",
      "status": "ok"
    }
  ],
  "generatedAt": "2026-01-15T00:00:00.000Z",
  "hmsSmoke": {
    "annualSummaries": [
      {
        "densityDays": {
          "heavy": -9007199254740991,
          "light": -9007199254740991,
          "medium": -9007199254740991,
          "unknown": -9007199254740991
        },
        "observedDays": -9007199254740991,
        "polygonCount": -9007199254740991,
        "year": -9007199254740991
      }
    ],
    "availableYears": [
      -9007199254740991
    ],
    "observedDates": [
      "2026-01-15T00:00:00.000Z"
    ],
    "provenance": {
      "datasetPage": "https://example.gov/record",
      "sourceName": "example",
      "sourceUrl": "https://example.gov/record"
    }
  },
  "kind": "air_quality_history",
  "period": {
    "endYear": -9007199254740991,
    "requestedYears": [
      -9007199254740991
    ],
    "startYear": -9007199254740991
  },
  "point": {
    "latitude": 1,
    "longitude": 1
  },
  "searchRadiusKm": 1
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://api.locus.report/api/locus-air-quality-history' \
  -H 'content-type: application/json' \
  --data-raw '{"address":"1 E Edenton St, Raleigh, NC 27601"}'

# 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://api.locus.report/api/locus-air-quality-history' \
  -H 'content-type: application/json' \
  --data-raw '{"address":"1 E Edenton St, Raleigh, NC 27601"}' \
  | 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 $0.05 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.05" });
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 $0.05 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fapi.locus.report%2Fapi%2Flocus-air-quality-history&method=POST
const res = await pay("https://api.locus.report/api/locus-air-quality-history", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "address": "1 E Edenton St, Raleigh, NC 27601"
  }),
});
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 $0.05 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.05"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://api.locus.report/api/locus-air-quality-history",
        json={
            "address": "1 E Edenton St, Raleigh, NC 27601",
        },
    )
    print(res.status_code, res.text)