Locus Flood Gauges

{
  "caveats": [
    "Gauge observations are point measurements at stream/river stations, not a parcel flood prediction or insurance determination.",
    "Nearby gauges may be on a different drainage basin than the property; verify watershed relevance with local floodplain or stormwater staff."
  ],
  "componentStatus": [
    {
      "component": "usgs_observations",
      "status": "ok"
    },
    {
      "component": "nws_nwps_thresholds",
      "status": "ok"
    }
  ],
  "gauges": [
    {
      "agency": "USGS",
      "distanceMeters": 1531,
      "name": "PIGEON HOUSE CR AT DORTCH STREET AT RALEIGH, NC",
      "nws": {
        "forecast": {
          "floodCategory": "fcst_not_current"
        },
        "gaugeId": "0208732544",
        "lid": "DRCN7",
        "observed": {
          "floodCategory": "no_flooding",
          "stage": 1.99,
          "unit": "ft",
          "validTime": "2026-09-23T00:10:00Z"
        },
        "officialUrl": "https://water.noaa.gov/gauges/DRCN7",
        "thresholds": {
          "action": 14,
          "flood": 15,
          "major": 20,
          "minor": 15,
          "moderate": 18
        },
        "usgsId": "0208732544"
      },
      "observations": [
        {
          "observedAt": "2026-09-22T20:55:00.000-04:00",
          "parameterCode": "00065",
          "parameterName": "Gage height, ft",
          "qualifiers": [
            "P"
          ],
          "unit": "ft",
          "value": 1.96
        }
      ],
      "officialUrl": "https://waterdata.usgs.gov/monitoring-location/0208732544",
      "point": {
        "latitude": 35.793892,
        "longitude": -78.642597
      },
      "siteId": "0208732544"
    },
    {
      "agency": "USGS",
      "distanceMeters": 1614,
      "name": "PIGEON HOUSE CR AT CAMERON VILLAGE AT RALEIGH, NC",
      "nws": {
        "forecast": {
          "floodCategory": "fcst_not_current"
        },
        "gaugeId": "0208732534",
        "lid": "PIGN7",
        "observed": {
          "floodCategory": "no_flooding",
          "stage": 1.41,
          "unit": "ft",
          "validTime": "2026-09-23T00:30:00Z"
        },
        "officialUrl": "https://water.noaa.gov/gauges/PIGN7",
        "thresholds": {
          "action": 5,
          "flood": 6,
          "major": 11,
          "minor": 6,
          "moderate": 8
        },
        "usgsId": "0208732534"
      },
      "observations": [
        {
          "observedAt": "2026-09-22T21:00:00.000-04:00",
          "parameterCode": "00060",
          "parameterName": "Streamflow, ft³/s",
          "qualifiers": [
            "P"
          ],
          "unit": "ft3/s",
          "value": 0.03
        },
        {
          "observedAt": "2026-09-22T21:00:00.000-04:00",
          "parameterCode": "00065",
          "parameterName": "Gage height, ft",
          "qualifiers": [
            "P"
          ],
          "unit": "ft",
          "value": 1.41
        }
      ],
      "officialUrl": "https://waterdata.usgs.gov/monitoring-location/0208732534",
      "point": {
        "latitude": 35.7875,
        "longitude": -78.6547222
      },
      "siteId": "0208732534"
    }
  ],
  "note": "Awareness/diagnostic only. Full briefs are x402-paid. Agents can discover live free tools at https://api.locus.report/tools/list and paid tools, prices, and manifests at https://api.locus.report/.well-known/ai-tool/index.json.",
  "ok": true,
  "point": {
    "latitude": 35.780418000003195,
    "longitude": -78.63910200000142
  },
  "provenance": {
    "coverage": "United States where USGS/NWS gauges publish observations or threshold metadata",
    "nwsServiceUrl": "https://api.water.noaa.gov/nwps/v1/",
    "nwsSourcePage": "https://water.noaa.gov/about/api",
    "source": "USGS National Water Information System + NOAA/NWS National Water Prediction Service",
    "usgsServiceUrl": "https://waterservices.usgs.gov/nwis/iv/",
    "usgsSourcePage": "https://www.usgs.gov/tools/usgs-water-data-apis"
  },
  "radiusMeters": 10000,
  "verifyNext": [
    {
      "source": "USGS",
      "step": "Open each USGS monitoring-location page for current observations and station metadata.",
      "url": "https://waterdata.usgs.gov/monitoring-location/"
    },
    {
      "source": "NOAA/NWS",
      "step": "Open the matching NOAA/NWS NWPS gauge page for flood-category thresholds and forecasts where available.",
      "url": "https://water.noaa.gov/"
    }
  ]
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://api.locus.report/api/locus-flood-gauges' \
  -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-flood-gauges' \
  -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 $0.01 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-flood-gauges&method=POST
const res = await pay("https://api.locus.report/api/locus-flood-gauges", {
  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 $0.01 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-flood-gauges",
        json={
            "address": "1 E Edenton St, Raleigh, NC 27601",
        },
    )
    print(res.status_code, res.text)