MCP Tool · x402 · early usage

USGS stream and river gauges with latest stage and flow, plus NOAA/NWS threshold metada…

USGS stream and river gauges with latest stage and flow, plus NOAA/NWS threshold metadata within the search radius, for buyer, owner and lender agents. Returns the same records as locus_flood_gauges. Use this when your client can only call paid x402 routes. U…

by api.locus.report · discovered, not yet claimed by its owner · updated 2026-10-08

30d calls4

30d payers2

MethodPOST

Outputjson

Mirrored from Coinbase's public x402 Bazaar. The description is the provider's own text and has not been reviewed here; the payment requirements are copied as published.

What it does

Tags: bazaar · builder-code · locus.freePreflight · offer-receipt

Call contract

Method: POST
Input: json
Output: json
Last paid call: 2026-10-08

Input example from Bazaar metadata

{
  "address": "1 E Edenton St, Raleigh, NC 27601"
}

Output example

{
  "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, ft&#179;/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/"
    }
  ]
}

Use with an agent

Discover. Agents find this listing with GET https://bazaar.saylorinnovations.com/discovery/search?query=…, the MCP tool search_resources, or /discovery/resources.
Inspect. Fetch /resources/51387.json for the price and payment options.
Pay. Call GET https://api.locus.report/api/locus-flood-gauges. The provider answers 402 with its payment requirements. An x402 client signs one of the options below and retries with PAYMENT-SIGNATURE.
Execute. The provider returns 200 with the data. Agent Bazaar is not in the request path and never sees your payment.

For humans

You don't need an account or an API key; you need a wallet holding a small amount of USDC on Base, Solana, and an x402-capable client (see the examples below). Call the endpoint unpaid first to see exactly what it asks for.

Pricing & payment

Price: $0.01 / request
Protocol: x402 v2
Auth: No account or API key. Pay per request.
Networks: Base, Solana
Demand: 4 calls · 2 unique payers in 30d (public x402 Bazaar data)

x402 payment requirements

Scheme	Network	Asset	Amount	Pay to	Timeout
exact	Base eip155:8453	USDC	$0.01	0xF121fbeceC43e1B616D47285851c20d5fC64431b	60s
exact	Solana solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp	USDC	$0.01	FBVHMG5PTNW6sNd7uhZBsxhWkwJYRpgk34QcTgDpQdwV	60s

accepts[] (raw JSON)

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0xF121fbeceC43e1B616D47285851c20d5fC64431b",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "10000",
    "amountUsd": 0.01,
    "maxTimeoutSeconds": 60
  },
  {
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "payTo": "FBVHMG5PTNW6sNd7uhZBsxhWkwJYRpgk34QcTgDpQdwV",
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "amount": "10000",
    "amountUsd": 0.01,
    "maxTimeoutSeconds": 60
  }
]

Schemas

Output schema (JSON Schema)

{
  "properties": {
    "example": {
      "type": "object"
    },
    "type": {
      "type": "string"
    }
  },
  "required": [
    "type"
  ],
  "type": "object"
}

Example shape — generated from the schema, not a captured live response

{
  "example": {},
  "type": "string"
}

Examples

curl

curl "https://api.locus.report/api/locus-flood-gauges"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

JavaScript

const res = await fetch("https://api.locus.report/api/locus-flood-gauges");
if (res.status === 402) {
  const { accepts } = await res.json();
  // pay one of accepts[] via an x402 client, then retry with the payment header
}

Python

import httpx
res = httpx.get("https://api.locus.report/api/locus-flood-gauges")
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header

Details

Provider: api.locus.report
Endpoint: https://api.locus.report/api/locus-flood-gauges
Machine-readable: /resources/51387.json