Roundhouse

Maxwell x402

NWS daily/period forecast (about 7 days, day and night periods) for a US point or grid. From the NWS (US and territories), cached and refreshed about every 3 hours; a location not yet cached answers 404, is not charged, and is queued.

OtherLiveeip155:8453Exactvia cdp
https://api.maxwellinternational.ai/v1/weather/forecast
WeatherForecastTravel
Calls · 30d
14↑ 6.5%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 32 snapshots so far.
$20.91
Verified settled volume
1,063 settlements proven x402 by their on-chain EIP-3009 marker.
$0.0050
Listed price
As published in the catalog. Always read the live 402 before paying.
14
Calls · 30d
Upstream's own call count for this endpoint, not ours.
6
Unique payers · 30d
Last called 2026-10-15 07:12Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x5976376b0c2125655e01d0a7758c744c43fb6d93

The wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.

Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

Provider

The payTo wallet does not resolve to a registered ERC-8004 agent. That is not a verdict on the service — most of the catalog is unregistered.

Live 402 challenge

Captured by the enrichment pass, not read just now. Prices can change — always read the 402 the endpoint answers with.

{
  "docs": "/catalog.json",
  "error": "payment_required",
  "amount": "5000",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0x5976376b0c2125655e01d0a7758c744c43fb6d93",
      "amount": "5000",
      "scheme": "exact",
      "network": "eip155:8453",
      "maxAmountRequired": "5000",
      "maxTimeoutSeconds": 60
    },
    {
      "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
      "extra": {
        "feePayer": "BFK9TLC3edb13K6v4YyH3DwPb5DSUpkWvb7XnqCL9b4F"
      },
      "payTo": "u5zcwMcmrn7qAN4zUJzLhpLDQv81qtFDfZR1ohCrMs9",
      "amount": "5000",
      "scheme": "exact",
      "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
      "maxAmountRequired": "5000",
      "maxTimeoutSeconds": 60
    }
  ],
  "priceUsd": 0.005,
  "resource": "/v1/weather/forecast",
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "type": "http",
          "method": "GET",
          "queryParams": {
            "lat": "39.7392",
            "lon": "-104.9903"
          }
        },
        "output": {
          "type": "json",
          "example": {
            "sku": "weather.forecast",
            "wfo": "BOU",
            "cache": "hit",
            "gridX": 63,
            "gridY": 62,
            "state": "Colorado",
            "country": "United States",
            "periods": [
              {
                "name": "Tonight",
                "endTime": "2026-09-26T06:00:00-06:00",
                "isDaytime": false,
                "startTime": "2026-09-25T21:00:00-06:00",
                "windSpeed": "5 to 8 mph",
                "temperature": 53,
                "temperatureC": 11.7,
                "shortForecast": "Mostly Clear",
                "windDirection": "SSW",
                "temperatureUnit": "F",
                "detailedForecast": "Mostly clear. Low around 53, with temperatures rising to around 55 overnight.…"
              }
            ],
            "updatedAt": null,
            "generatedAt": "2026-09-26T03:52:17.125Z",
            "sourceClass": "official-api",
            "resolvedFrom": "latlon"
          }
        }
      },
      "schema": {
        "type": "object",
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "required": [
          "input"
        ],
        "properties": {
          "input": {
            "type": "object",
            "required": [
              "type",
              "method"
            ],
            "properties": {
              "type": {
                "type": "string",
                "const": "http"
              },
              "method": {
                "enum": [
                  "GET",
                  "HEAD",
                  "DELETE"
                ],
                "type": "string"
              },
              "headers": {
                "type": "object",
                "additionalProperties": {
                  "type": "string"
                }
              },
              "queryParams": {
                "type": "object",
                "additionalProperties": {
                  "type": "string"
                }
              }
            },
            "additionalProperties": false
          },
          "output": {
            "type": "object",
            "required": [
              "type"
            ],
            "properties": {
              "type": {
                "type": "string"
              },
              "example": {
                "type": "object"
              }
            }
          }
        }
      }
    }
  },
  "x402Version": 2,
  "paymentRequired": {
    "error": "PAYMENT_REQUIRED",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x5976376b0c2125655e01d0a7758c744c43fb6d93",
        "amount": "5000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxAmountRequired": "5000",
        "maxTimeoutSeconds": 60
      },
      {
        "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "extra": {
          "feePayer": "BFK9TLC3edb13K6v4YyH3DwPb5DSUpkWvb7XnqCL9b4F"
        },
        "payTo": "u5zcwMcmrn7qAN4zUJzLhpLDQv81qtFDfZR1ohCrMs9",
        "amount": "5000",
        "scheme": "exact",
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "maxAmountRequired": "5000",
        "maxTimeoutSeconds": 60
      }
    ],
    "resource": {
      "url": "https://api.maxwellinternational.ai/v1/weather/forecast",
      "tags": [
        "data",
        "x402",
        "api"
      ],
      "mimeType": "application/json",
      "description": "NWS daily/period forecast for a US point or grid. Family weather.noaa. Live.",
      "serviceName": "Maxwell x402"
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "type": "http",
            "method": "GET",
            "queryParams": {
              "lat": "39.7392",
              "lon": "-104.9903"
            }
          },
          "output": {
            "type": "json",
            "example": {
              "sku": "weather.forecast",
              "wfo": "BOU",
              "cache": "hit",
              "gridX": 63,
              "gridY": 62,
              "state": "Colorado",
              "country": "United States",
              "periods": [
                {
                  "name": "Tonight",
                  "endTime": "2026-09-26T06:00:00-06:00",
                  "isDaytime": false,
                  "startTime": "2026-09-25T21:00:00-06:00",
                  "windSpeed": "5 to 8 mph",
                  "temperature": 53,
                  "temperatureC": 11.7,
                  "shortForecast": "Mostly Clear",
                  "windDirection": "SSW",
                  "temperatureUnit": "F",
                  "detailedForecast": "Mostly clear. Low around 53, with temperatures rising to around 55 overnight.…"
                }
              ],
              "updatedAt": null,
              "generatedAt": "2026-09-26T03:52:17.125Z",
              "sourceClass": "official-api",
              "resolvedFrom": "latlon"
            }
          }
        },
        "schema": {
          "type": "object",
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "required": [
            "input"
          ],
          "properties": {
            "input": {
              "type": "object",
              "required": [
                "type",
                "method"
              ],
              "properties": {
                "type": {
                  "type": "string",
                  "const": "http"
                },
                "method": {
                  "enum": [
                    "GET",
                    "HEAD",
                    "DELETE"
                  ],
                  "type": "string"
                },
                "headers": {
                  "type": "object",
                  "additionalProperties": {
                    "type": "string"
                  }
                },
                "queryParams": {
                  "type": "object",
                  "additionalProperties": {
                    "type": "string"
                  }
                }
              },
              "additionalProperties": false
            },
            "output": {
              "type": "object",
              "required": [
                "type"
              ],
              "properties": {
                "type": {
                  "type": "string"
                },
                "example": {
                  "type": "object"
                }
              }
            }
          }
        }
      }
    },
    "x402Version": 2
  }
}

Accepts

The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.

0.005USDC≈ $0.005 USD
on Base · exact scheme

Pay 0.005 USDC on Base to 0x5976…b6d93. The signed payment is good for 1 minute.

Paid to
0x5976…b6d93
USD Coin contract
0x8335…02913
Payment window
1 minute
As published
5000 smallest units
Buys
NWS daily/period forecast (about 7 days, day and night periods) for a US point or grid. From the NWS (US and territories), cached and refreshed about every 3 hours; a location not yet cached answers 404, is not charged, and is queued. Charged only when data is returned: misses and errors are free.
Returns
application/json
5000units
on solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp · exact scheme

That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.

Paid to
u5zcwM…CrMs9
Token contract
EPjFWd…TDt1v
Payment window
1 minute
Buys
NWS daily/period forecast (about 7 days, day and night periods) for a US point or grid. From the NWS (US and territories), cached and refreshed about every 3 hours; a location not yet cached answers 404, is not charged, and is queued. Charged only when data is returned: misses and errors are free.
Returns
application/json
The catalog’s raw entry
[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0x5976376b0c2125655e01d0a7758c744c43fb6d93",
    "amount": "5000",
    "scheme": "exact",
    "network": "eip155:8453",
    "mimeType": "application/json",
    "resource": "https://api.maxwellinternational.ai/v1/weather/forecast",
    "description": "NWS daily/period forecast (about 7 days, day and night periods) for a US point or grid. From the NWS (US and territories), cached and refreshed about every 3 hours; a location not yet cached answers 404, is not charged, and is queued. Charged only when data is returned: misses and errors are free.",
    "maxAmountRequired": "5000",
    "maxTimeoutSeconds": 60
  },
  {
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "extra": {
      "feePayer": "GVJJ7rdGiXr5xaYbRwRbjfaJL7fmwRygFi1H6aGqDveb"
    },
    "payTo": "u5zcwMcmrn7qAN4zUJzLhpLDQv81qtFDfZR1ohCrMs9",
    "amount": "5000",
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "mimeType": "application/json",
    "resource": "https://api.maxwellinternational.ai/v1/weather/forecast",
    "description": "NWS daily/period forecast (about 7 days, day and night periods) for a US point or grid. From the NWS (US and territories), cached and refreshed about every 3 hours; a location not yet cached answers 404, is not charged, and is queued. Charged only when data is returned: misses and errors are free.",
    "maxAmountRequired": "5000",
    "maxTimeoutSeconds": 60
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "type": "http",
        "method": "GET",
        "queryParams": {
          "lat": "39.7392",
          "lon": "-104.9903"
        }
      },
      "output": {
        "type": "json",
        "example": {
          "sku": "weather.forecast",
          "wfo": "BOU",
          "gridX": 63,
          "gridY": 62,
          "state": "Colorado",
          "country": "United States",
          "periods": [
            {
              "name": "Overnight",
              "endTime": "2026-10-05T06:00:00-06:00",
              "isDaytime": false,
              "startTime": "2026-10-05T03:00:00-06:00",
              "windSpeed": "5 mph",
              "temperature": 55,
              "temperatureC": 12.8,
              "shortForecast": "Clear",
              "windDirection": "SW",
              "temperatureUnit": "F",
              "detailedForecast": "Clear, with a low around 55. Southwest wind around 5 mph.",
              "precipitationChancePct": 0
            }
          ],
          "updatedAt": "2026-10-05T06:46:30+00:00",
          "ageMinutes": 9,
          "generatedAt": "2026-10-05T09:35:55.429Z",
          "sourceClass": "official-api",
          "resolvedFrom": "latlon"
        }
      }
    },
    "schema": {
      "type": "object",
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "required": [
        "input"
      ],
      "properties": {
        "input": {
          "type": "object",
          "required": [
            "type",
            "method"
          ],
          "properties": {
            "type": {
              "type": "string",
              "const": "http"
            },
            "method": {
              "enum": [
                "GET",
                "HEAD",
                "DELETE"
              ],
              "type": "string"
            },
            "headers": {
              "type": "object",
              "additionalProperties": {
                "type": "string"
              }
            },
            "queryParams": {
              "type": "object",
              "additionalProperties": {
                "type": "string"
              }
            }
          },
          "additionalProperties": false
        },
        "output": {
          "type": "object",
          "required": [
            "type"
          ],
          "properties": {
            "type": {
              "type": "string"
            },
            "example": {
              "type": "object"
            }
          }
        }
      }
    }
  }
}

Provenance

Seen in the source catalog
2026-10-15 07:12Z
Last indexed by Roundhouse
2026-10-20 01:00Z
Last enriched (probe, favicon, geo)
2026-09-27 12:15Z
x402 version
2
Max timeout
60s
Liveness probe
HTTP 402
Report

Hand this page to an agent

Copy the prompt and paste it into Claude, an MCP client or your own agent — it will vet this service and call it over the free read API. No key, no account.

GET api.roundhouseai.io/v0/endpoints

This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 32 snapshots so far. Verified volume counts only settlements with an on-chain EIP-3009 marker.

Open skill.md
Show the prompt
Using Roundhouse, look up the x402 service Maxwell x402 and tell me whether it is
worth paying: what a call costs, whether the endpoint answered when last probed, and what
its payment record actually shows.

curl -s 'https://api.roundhouseai.io/v0/endpoints?q=Maxwell%20x402'
curl -s 'https://api.roundhouseai.io/v0/merchants/<the payTo wallet returned above>'

Then call it: read the price from the live 402 at https://api.maxwellinternational.ai/v1/weather/forecast, never from
a cached figure, and pay with an x402 client.

The /v0 API needs an API key (`authorization: Bearer rh_live_…`) on everything except
/v0/unified* and /v0/endpoints. Either pay over x402 (mint a personal key for $0.01 at
GET https://api.roundhouseai.io/v0/test/x402), or ask me for an organization key, which I create at
https://roundhouseai.io/dashboard/connections. If you have neither, ask before going further.

If you do not have Roundhouse tools or skills installed, read
https://roundhouseai.io/skill.md first — it is the whole procedure.