Locus Traffic Crash Context

{
  "caveats": [
    "Police reports do not include every crash, and reporting thresholds and classification practices differ across jurisdictions."
  ],
  "coverage": "localized_plus_fatal_companion",
  "localCoverage": {
    "allReportedAvailable": false,
    "combinationNote": "North Carolina subset totals are not combined because K+A and non-motorist records can overlap; neither source is all-report coverage.",
    "combinedSourceTotal": null,
    "severityClasses": [
      "nonmotorist_only"
    ]
  },
  "ok": true,
  "radiiMeters": [
    200
  ],
  "registryCoverage": {
    "label": "Chicago all-reported; Virginia reportable-threshold; North Carolina partial subsets (K+A and nonmotorist); Pikes Peak region reportable-threshold; nationwide FARS fatal-only companion",
    "supportedLocalGeographies": [
      "Chicago"
    ]
  },
  "requestedWindow": {
    "from": "2023-09-23",
    "lookbackYears": 3,
    "through": "2026-09-23"
  },
  "sources": [
    {
      "aggregates": [
        {
          "modes": [
            {
              "count": null,
              "displayCount": "<3",
              "normalized": "bicycle",
              "officialLabel": "Bicyclist",
              "suppressed": true
            }
          ],
          "radiusMeters": 200,
          "severity": [
            {
              "count": null,
              "displayCount": "<3",
              "normalized": "serious_injury",
              "officialLabel": "A: Suspected Serious Injury",
              "suppressed": true
            }
          ],
          "total": null,
          "totalSuppressed": true
        }
      ],
      "availableYears": {
        "from": 2007,
        "through": 2025
      },
      "caveats": [
        "This is a pedestrian/bicycle subset only and must not be described as all reported North Carolina crashes."
      ],
      "geography": "North Carolina",
      "provenance": {
        "authority": "North Carolina Department of Transportation",
        "checkedAt": "2026-09-23T01:11:51.303Z",
        "fetchedAt": "2026-09-23T01:11:51.847Z",
        "officialSourceUrl": "https://services.arcgis.com/NuWFvHYDMVmmxMeM/arcgis/rest/services/NCDOT_NonMotoristCrashes/FeatureServer/0",
        "queryLocator": "https://services.arcgis.com/NuWFvHYDMVmmxMeM/arcgis/rest/services/NCDOT_NonMotoristCrashes/FeatureServer/0/query",
        "recordIdentifierNote": "Source-side aggregate query; individual crash identifiers are intentionally not fetched or returned.",
        "recordIdentifiers": [],
        "sourceId": "nc-ncdot-nonmotorist-crashes",
        "sourceIdentifier": "NCDOT_NonMotoristCrashes/FeatureServer/0",
        "sourceName": "NCDOT Non-Motorist Crashes"
      },
      "severityClass": "nonmotorist_only",
      "sourceId": "nc-ncdot-nonmotorist-crashes",
      "status": "ok",
      "updateCadence": "Periodic statewide release",
      "updateLag": "Verified through 2025; publication can lag the current year"
    }
  ],
  "verifyNext": [
    {
      "step": "Review the named source's severity class, available years, and update lag before comparing counts."
    }
  ]
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://api.locus.report/api/locus-traffic-crash-context' \
  -H 'content-type: application/json' \
  --data-raw '{"address":"1 E Edenton St, Raleigh, NC 27601","lookbackYears":3,"radiiMeters":[200,500,1000]}'

# 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-traffic-crash-context' \
  -H 'content-type: application/json' \
  --data-raw '{"address":"1 E Edenton St, Raleigh, NC 27601","lookbackYears":3,"radiiMeters":[200,500,1000]}' \
  | 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%2Fapi.locus.report%2Fapi%2Flocus-traffic-crash-context&method=POST
const res = await pay("https://api.locus.report/api/locus-traffic-crash-context", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "address": "1 E Edenton St, Raleigh, NC 27601",
    "lookbackYears": 3,
    "radiiMeters": [
      200,
      500,
      1000
    ]
  }),
});
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://api.locus.report/api/locus-traffic-crash-context",
        json={
            "address": "1 E Edenton St, Raleigh, NC 27601",
            "lookbackYears": 3,
            "radiiMeters": [
                200,
                500,
                1000,
            ],
        },
    )
    print(res.status_code, res.text)