Roundhouse AI

AgentResolver

Verify an x402 endpoint before paying: live payTo, USDC quote, network, asset, resource binding, TLS and endpoint safety for $0.001 on Base or Solana.

SearchLiveeip155:8453Exactvia facilitator:payAI
https://agentresolver.vercel.app/api/x402-settlement-verify
x402Agent-tools
Settlements · 30d
23↑ 567%
No per-endpoint history for this service yet, so this is payments indexed to its PROVIDER's wallet over 30 days.
$0.16
Verified settled volume
23 settlements proven x402 by their on-chain EIP-3009 marker.
$0.0010
Listed price
As published in the catalog. Always read the live 402 before paying.
—
Calls · 30d
Upstream's own call count for this endpoint, not ours.
—
Unique payers · 30d
Never called
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x66E19457fFC829E8Ed74706f5c1399C6F6466dE8

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": "0x66E19457fFC829E8Ed74706f5c1399C6F6466dE8",
      "amount": "1000",
      "scheme": "exact",
      "network": "eip155:8453",
      "maxTimeoutSeconds": 300
    },
    {
      "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
      "extra": {
        "feePayer": "CjNFTjvBhbJJd2B5ePPMHRLx1ELZpa8dwQgGL727eKww"
      },
      "payTo": "AoQNzm7dB7dhBXfgq9ywqkfkS68fg2e1JwcxrgXnkLXa",
      "amount": "1000",
      "scheme": "exact",
      "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
      "maxTimeoutSeconds": 300
    }
  ],
  "resource": {
    "url": "https://agentresolver.vercel.app/api/x402-settlement-verify",
    "tags": [
      "x402",
      "agent-tools"
    ],
    "mimeType": "application/json",
    "description": "Verify a completed Base USDC x402 exact-scheme settlement from its transaction hash. Reads the public Base receipt and transaction, confirms EIP-3009 payment shape, decodes USDC Transfer events, reports confirmation depth, and optionally...",
    "serviceName": "AgentResolver"
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "type": "http",
          "method": "GET",
          "queryParams": {
            "txHash": "0x7729766d8615c6bd052340bddc95019be20afd78c2cd39faa4812775e3227b72",
            "expectedPayTo": "0x66E19457fFC829E8Ed74706f5c1399C6F6466dE8",
            "expectedAmountAtomic": "1000"
          }
        },
        "output": {
          "type": "json",
          "example": {
            "settled": true,
            "verdict": "verified",
            "paymentShape": "eip3009-exact",
            "transferCount": 1
          }
        }
      },
      "schema": {
        "type": "object",
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "required": [
          "input"
        ],
        "properties": {
          "input": {
            "type": "object",
            "required": [
              "type",
              "method"
            ],
            "properties": {
              "type": {
                "type": "string",
                "const": "http"
              },
              "method": {
                "enum": [
                  "GET"
                ],
                "type": "string"
              },
              "queryParams": {
                "type": "object",
                "required": [
                  "txHash"
                ],
                "properties": {
                  "txHash": {
                    "type": "string",
                    "pattern": "^0x[0-9a-fA-F]{64}$",
                    "description": "Base mainnet transaction hash returned by an x402 settlement."
                  },
                  "expectedPayTo": {
                    "type": "string",
                    "pattern": "^0x[0-9a-fA-F]{40}$",
                    "description": "Optional expected USDC recipient; mismatch fails closed."
                  },
                  "expectedAmountAtomic": {
                    "type": "string",
                    "pattern": "^[0-9]{1,78}$",
                    "description": "Optional expected six-decimal USDC atomic amount; mismatch fails closed."
                  }
                },
                "additionalProperties": false
              }
            },
            "additionalProperties": false
          },
          "output": {
            "type": "object",
            "required": [
              "type"
            ],
            "properties": {
              "type": {
                "type": "string"
              },
              "example": {
                "type": "object",
                "required": [
                  "settled",
                  "verdict",
                  "paymentShape",
                  "transferCount"
                ],
                "properties": {
                  "settled": {
                    "type": "boolean"
                  },
                  "verdict": {
                    "enum": [
                      "verified",
                      "reverted",
                      "not_usdc_eip3009",
                      "expectation_mismatch",
                      "not_found"
                    ],
                    "type": "string"
                  },
                  "paymentShape": {
                    "enum": [
                      "eip3009-exact",
                      "other",
                      "unknown"
                    ],
                    "type": "string"
                  },
                  "transferCount": {
                    "type": "integer",
                    "minimum": 0
                  }
                },
                "additionalProperties": true
              }
            }
          }
        }
      }
    }
  },
  "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.

0.001USDC≈ $0.001 USD
on Base · exact scheme

Pay 0.001 USDC on Base to 0x66E1…66dE8. The signed payment is good for 5 minutes.

Paid to
0x66E1…66dE8
USD Coin contract
0x8335…02913
Payment window
5 minutes
As published
1000 smallest units
The catalog’s raw entry
[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0x66E19457fFC829E8Ed74706f5c1399C6F6466dE8",
    "amount": "1000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 300
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "type": "http",
        "method": "GET",
        "queryParams": {
          "txHash": "0x7729766d8615c6bd052340bddc95019be20afd78c2cd39faa4812775e3227b72",
          "expectedPayTo": "0x66E19457fFC829E8Ed74706f5c1399C6F6466dE8",
          "expectedAmountAtomic": "1000"
        }
      },
      "output": {
        "type": "json",
        "example": {
          "settled": true,
          "verdict": "verified",
          "paymentShape": "eip3009-exact",
          "transferCount": 1
        }
      }
    },
    "schema": {
      "type": "object",
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "required": [
        "input"
      ],
      "properties": {
        "input": {
          "type": "object",
          "required": [
            "type",
            "method"
          ],
          "properties": {
            "type": {
              "type": "string",
              "const": "http"
            },
            "method": {
              "enum": [
                "GET"
              ],
              "type": "string"
            },
            "queryParams": {
              "type": "object",
              "required": [
                "txHash"
              ],
              "properties": {
                "txHash": {
                  "type": "string",
                  "pattern": "^0x[0-9a-fA-F]{64}$",
                  "description": "Base mainnet transaction hash returned by an x402 settlement."
                },
                "expectedPayTo": {
                  "type": "string",
                  "pattern": "^0x[0-9a-fA-F]{40}$",
                  "description": "Optional expected USDC recipient; mismatch fails closed."
                },
                "expectedAmountAtomic": {
                  "type": "string",
                  "pattern": "^[0-9]{1,78}$",
                  "description": "Optional expected six-decimal USDC atomic amount; mismatch fails closed."
                }
              },
              "additionalProperties": false
            }
          },
          "additionalProperties": false
        },
        "output": {
          "type": "object",
          "required": [
            "type"
          ],
          "properties": {
            "type": {
              "type": "string"
            },
            "example": {
              "type": "object",
              "required": [
                "settled",
                "verdict",
                "paymentShape",
                "transferCount"
              ],
              "properties": {
                "settled": {
                  "type": "boolean"
                },
                "verdict": {
                  "enum": [
                    "verified",
                    "reverted",
                    "not_usdc_eip3009",
                    "expectation_mismatch",
                    "not_found"
                  ],
                  "type": "string"
                },
                "paymentShape": {
                  "enum": [
                    "eip3009-exact",
                    "other",
                    "unknown"
                  ],
                  "type": "string"
                },
                "transferCount": {
                  "type": "integer",
                  "minimum": 0
                }
              },
              "additionalProperties": true
            }
          }
        }
      }
    }
  }
}

Provenance

Seen in the source catalog
2026-09-22 06:17Z
Last indexed by Roundhouse
2026-09-25 12:15Z
Last enriched (probe, favicon, geo)
2026-09-22 01:45Z
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

No per-endpoint history for this service yet, so this is payments indexed to its PROVIDER's wallet over 30 days. 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 AgentResolver 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=AgentResolver'
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://agentresolver.vercel.app/api/x402-settlement-verify, 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.