Roundhouse

138-197-15-135.sslip.io

Best Uniswap v3 single-hop quote for swapping amountIn of tokenIn to tokenOut on Base, Ethereum, Arbitrum or Optimism, checking all fee tiers (0.01/0.05/0.3/1%). Returns amountOut, effective price, best fee tier, gas estimate. Tokens: ETH, USDC, USDT or 0x address. Read-only quote; no swap is executed. Deterministic, no LLM.

InferenceLiveeip155:8453Exactvia cdp
https://138-197-15-135.sslip.io/v1/dex/quote
Calls · 30d
2→ 0%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 19 snapshots so far.
$1.14
Verified settled volume
120 settlements proven x402 by their on-chain EIP-3009 marker.
$0.0045
Listed price
As published in the catalog. Always read the live 402 before paying.
2
Calls · 30d
Upstream's own call count for this endpoint, not ours.
1
Unique payers · 30d
Last called 2026-10-28 14:10Z
$0.002
Upstream on-chain volume
1 transactions, checked 2026-11-04 13:45Z
Paid to
0x10741397e86340a4608C771a9B823038d762ea42

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 required",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0x10741397e86340a4608C771a9B823038d762ea42",
      "amount": "4500",
      "scheme": "exact",
      "network": "eip155:8453",
      "maxTimeoutSeconds": 60
    },
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0x10741397e86340a4608C771a9B823038d762ea42",
      "scheme": "exact",
      "network": "base",
      "mimeType": "application/json",
      "resource": "https://138-197-15-135.sslip.io/v1/dex/quote",
      "description": "Best Uniswap v3 single-hop quote for swapping amountIn of tokenIn to tokenOut on Base, Ethereum, Arbitrum or Optimism, checking all fee tiers (0.01/0.05/0.3/1%). Returns amountOut, effective price, best fee tier, gas estimate. Tokens: ETH, USDC, USDT or 0x address. Read-only quote; no swap is executed. Deterministic, no LLM.",
      "outputSchema": {
        "input": {
          "type": "http",
          "method": "GET",
          "queryParams": {
            "chain": {
              "type": "string",
              "example": "base",
              "required": false,
              "description": "Chain: base (default), ethereum, arbitrum, optimism"
            },
            "tokenIn": {
              "type": "string",
              "example": "ETH",
              "required": true,
              "description": "ETH, USDC, USDT or 0x address"
            },
            "amountIn": {
              "type": "string",
              "example": "1",
              "required": true,
              "description": "Human amount of tokenIn, e.g. 1.5"
            },
            "tokenOut": {
              "type": "string",
              "example": "USDC",
              "required": true,
              "description": "ETH, USDC, USDT or 0x address"
            }
          },
          "discoverable": true
        },
        "output": {
          "type": "json",
          "example": {
            "chain": "base",
            "price": 2325.41,
            "venue": "uniswap-v3",
            "feeTier": 500,
            "tokenIn": "WETH",
            "amountIn": "1",
            "tokenOut": "USDC",
            "amountOut": "2325.41",
            "gasEstimate": "90000"
          }
        }
      },
      "maxAmountRequired": "4500",
      "maxTimeoutSeconds": 60
    }
  ],
  "resource": {
    "url": "https://138-197-15-135.sslip.io/v1/dex/quote",
    "mimeType": "application/json",
    "description": "Best Uniswap v3 single-hop quote for swapping amountIn of tokenIn to tokenOut on Base, Ethereum, Arbitrum or Optimism, checking all fee tiers (0.01/0.05/0.3/1%). Returns amountOut, effective price, best fee tier, gas estimate. Tokens: ETH, USDC, USDT or 0x address. Read-only quote; no swap is executed. Deterministic, no LLM."
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "type": "http",
          "method": "GET",
          "queryParams": {
            "chain": "base",
            "tokenIn": "ETH",
            "amountIn": "1",
            "tokenOut": "USDC"
          }
        },
        "output": {
          "type": "json",
          "example": {
            "chain": "base",
            "price": 2325.41,
            "venue": "uniswap-v3",
            "feeTier": 500,
            "tokenIn": "WETH",
            "amountIn": "1",
            "tokenOut": "USDC",
            "amountOut": "2325.41",
            "gasEstimate": "90000"
          }
        }
      },
      "schema": {
        "type": "object",
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "required": [
          "input"
        ],
        "properties": {
          "input": {
            "type": "object",
            "required": [
              "queryParams"
            ],
            "properties": {
              "queryParams": {
                "type": "object",
                "required": [
                  "tokenIn",
                  "tokenOut",
                  "amountIn"
                ],
                "properties": {
                  "chain": {
                    "type": "string",
                    "description": "Chain: base (default), ethereum, arbitrum, optimism"
                  },
                  "tokenIn": {
                    "type": "string",
                    "description": "ETH, USDC, USDT or 0x address"
                  },
                  "amountIn": {
                    "type": "string",
                    "description": "Human amount of tokenIn, e.g. 1.5"
                  },
                  "tokenOut": {
                    "type": "string",
                    "description": "ETH, USDC, USDT or 0x address"
                  }
                }
              }
            }
          },
          "output": {
            "type": "object",
            "required": [
              "type"
            ],
            "properties": {
              "type": {
                "type": "string",
                "const": "json"
              },
              "example": {
                "type": "object",
                "required": [],
                "properties": {
                  "chain": {
                    "type": [
                      "string",
                      "null"
                    ]
                  },
                  "price": {
                    "type": [
                      "number",
                      "null"
                    ]
                  },
                  "venue": {
                    "type": [
                      "string",
                      "null"
                    ]
                  },
                  "feeTier": {
                    "type": [
                      "integer",
                      "null"
                    ]
                  },
                  "tokenIn": {
                    "type": [
                      "string",
                      "null"
                    ]
                  },
                  "amountIn": {
                    "type": [
                      "string",
                      "null"
                    ]
                  },
                  "tokenOut": {
                    "type": [
                      "string",
                      "null"
                    ]
                  },
                  "amountOut": {
                    "type": [
                      "string",
                      "null"
                    ]
                  },
                  "gasEstimate": {
                    "type": [
                      "string",
                      "null"
                    ]
                  }
                }
              }
            }
          }
        }
      }
    }
  },
  "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.

0.0045USDC≈ $0.0045 USD
on Base · exact scheme

Pay 0.0045 USDC on Base to 0x1074…2ea42. The signed payment is good for 1 minute.

Paid to
0x1074…2ea42
USD Coin contract
0x8335…02913
Payment window
1 minute
As published
4500 smallest units
The catalog’s raw entry
[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0x10741397e86340a4608C771a9B823038d762ea42",
    "amount": "4500",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 60
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "type": "http",
        "method": "GET",
        "queryParams": {
          "chain": "base",
          "tokenIn": "ETH",
          "amountIn": "1",
          "tokenOut": "USDC"
        }
      },
      "output": {
        "type": "json",
        "example": {
          "chain": "base",
          "price": 2325.41,
          "venue": "uniswap-v3",
          "feeTier": 500,
          "tokenIn": "WETH",
          "amountIn": "1",
          "tokenOut": "USDC",
          "amountOut": "2325.41",
          "gasEstimate": "90000"
        }
      }
    },
    "schema": {
      "type": "object",
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "required": [
        "input"
      ],
      "properties": {
        "input": {
          "type": "object",
          "required": [
            "queryParams"
          ],
          "properties": {
            "queryParams": {
              "type": "object",
              "required": [
                "tokenIn",
                "tokenOut",
                "amountIn"
              ],
              "properties": {
                "chain": {
                  "type": "string",
                  "description": "Chain: base (default), ethereum, arbitrum, optimism"
                },
                "tokenIn": {
                  "type": "string",
                  "description": "ETH, USDC, USDT or 0x address"
                },
                "amountIn": {
                  "type": "string",
                  "description": "Human amount of tokenIn, e.g. 1.5"
                },
                "tokenOut": {
                  "type": "string",
                  "description": "ETH, USDC, USDT or 0x address"
                }
              }
            }
          }
        }
      }
    }
  }
}

Provenance

Seen in the source catalog
2026-10-28 14:10Z
Last indexed by Roundhouse
2026-11-11 02:10Z
Last enriched (probe, favicon, geo)
2026-11-04 13:45Z
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. 19 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 138-197-15-135.sslip.io 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=138-197-15-135.sslip.io'
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://138-197-15-135.sslip.io/v1/dex/quote, 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.