Roundhouse

www.ryanseslow.com

Official site of Ryan Seslow. NYC artist and designer specializing in digital media, murals, and AI. Home of the Ryan Seslow Museum of Art & Design.

InferenceLiveeip155:8453Exactvia cdp
https://www.ryanseslow.com/wp-json/rsmad/v1/x402/v2/park
Calls · 30d
1
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 5 snapshots so far.
$10.50
Verified settled volume
2 settlements proven x402 by their on-chain EIP-3009 marker.
$0.500
Listed price
As published in the catalog. Always read the live 402 before paying.
1
Calls · 30d
Upstream's own call count for this endpoint, not ours.
1
Unique payers · 30d
Last called 2026-09-19 20:54Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x80b5A3680d1476E7511f5111d6ff8759F5A063D8

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.

{
  "error": "PAYMENT-SIGNATURE header is required",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0x80b5A3680d1476E7511f5111d6ff8759F5A063D8",
      "amount": "500000",
      "scheme": "exact",
      "network": "eip155:8453",
      "maxTimeoutSeconds": 300
    }
  ],
  "resource": {
    "url": "https://www.ryanseslow.com/wp-json/rsmad/v1/x402/v2/park",
    "mimeType": "application/json",
    "description": "The RSMAD Sculpture Park as data: placards and preview images for 37 sculptures. The park is free for people to walk. No 3D model files, no licence. $0.50 USDC."
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "type": "http",
          "method": "GET"
        },
        "output": {
          "type": "json",
          "example": {
            "park": {
              "name": "The RSMAD Sculpture Park",
              "walk": "https://ryanseslow.com/rsmad-sculpture-park/enter.html",
              "count": 37
            },
            "works": [
              {
                "slug": "the-hybrid",
                "title": "…",
                "placard": "…",
                "preview": "https://…"
              }
            ],
            "success": true
          }
        }
      },
      "schema": {
        "type": "object",
        "$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"
                ],
                "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.

0.5USDC≈ $0.5 USD
on Base · exact scheme

Pay 0.5 USDC on Base to 0x80b5…063D8. The signed payment is good for 5 minutes.

Paid to
0x80b5…063D8
USD Coin contract
0x8335…02913
Payment window
5 minutes
As published
500000 smallest units
The catalog’s raw entry
[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0x80b5A3680d1476E7511f5111d6ff8759F5A063D8",
    "amount": "500000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 300
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "type": "http",
        "method": "GET"
      },
      "output": {
        "type": "json",
        "example": {
          "park": {
            "name": "The RSMAD Sculpture Park",
            "walk": "https://ryanseslow.com/rsmad-sculpture-park/enter.html",
            "count": 37
          },
          "works": [
            {
              "slug": "the-hybrid",
              "title": "…",
              "placard": "…",
              "preview": "https://…"
            }
          ],
          "success": true
        }
      }
    },
    "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"
              ],
              "type": "string"
            }
          },
          "additionalProperties": false
        },
        "output": {
          "type": "object",
          "required": [
            "type"
          ],
          "properties": {
            "type": {
              "type": "string"
            },
            "example": {
              "type": "object"
            }
          }
        }
      }
    }
  }
}

Provenance

Seen in the source catalog
2026-09-19 20:54Z
Last indexed by Roundhouse
2026-09-24 09:40Z
Last enriched (probe, favicon, geo)
2026-09-19 21:15Z
x402 version
2
Max timeout
300s
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. 5 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 www.ryanseslow.com 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=www.ryanseslow.com'
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://www.ryanseslow.com/wp-json/rsmad/v1/x402/v2/park, 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. Mint a personal key for $0.01 at GET https://api.roundhouseai.io/v0/test/x402,
or use an organization key from https://roundhouseai.io/dashboard/team.

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