Roundhouse AI

three.ws Skill Market

Skill Marketplace — list active skill listings with prices across all three.ws agents. Filter by skill name to find the cheapest provider for a given capability. Returns price atomics, chain, currency, trial offer, and time-pass terms.

TradingLiveeip155:8453Exactvia cdp
https://three.ws/api/x402/skill-marketplace
MarketplaceAgentSkillsPricingDiscovery
Settlements · 30d
4
No per-endpoint history for this service yet, so this is payments indexed to its PROVIDER's wallet over 30 days.
$0.19
Verified settled volume
59 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.
2
Calls · 30d
Upstream's own call count for this endpoint, not ours.
2
Unique payers · 30d
Last called 2026-07-20 19:09Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x4022de2d36c334e73c7a108805cea11c0564f402

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": "X-PAYMENT header is required",
  "accepts": [
    {
      "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
      "extra": {
        "name": "USDC",
        "decimals": 6,
        "feePayer": "WwwuGbqHrwF5RG89KhUbmRWEvjnRH9k5kVM5p7T3WwW"
      },
      "payTo": "wwwwwDxFWRn7grgr3Esrsg5C6NvDoDHSA4gaCffccrU",
      "amount": "1000",
      "scheme": "exact",
      "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
      "resource": "https://three.ws/api/x402/skill-marketplace",
      "maxTimeoutSeconds": 60
    },
    {
      "asset": "FeMbDoX7R1Psc4GEcvJdsbNbZA3bfztcyDCatJVJpump",
      "extra": {
        "name": "THREE",
        "decimals": 6,
        "feePayer": "WwwuGbqHrwF5RG89KhUbmRWEvjnRH9k5kVM5p7T3WwW"
      },
      "payTo": "wwwwwDxFWRn7grgr3Esrsg5C6NvDoDHSA4gaCffccrU",
      "amount": "10000000",
      "scheme": "exact",
      "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
      "resource": "https://three.ws/api/x402/skill-marketplace",
      "maxTimeoutSeconds": 60
    },
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2",
        "decimals": 6
      },
      "payTo": "0x4022de2d36c334e73c7a108805cea11c0564f402",
      "amount": "1000",
      "scheme": "exact",
      "network": "eip155:8453",
      "resource": "https://three.ws/api/x402/skill-marketplace",
      "maxTimeoutSeconds": 60
    },
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2",
        "decimals": 6,
        "supportsEip2612": true,
        "assetTransferMethod": "permit2"
      },
      "payTo": "0x4022de2d36c334e73c7a108805cea11c0564f402",
      "amount": "1000",
      "scheme": "exact",
      "network": "eip155:8453",
      "resource": "https://three.ws/api/x402/skill-marketplace",
      "maxTimeoutSeconds": 60
    }
  ],
  "resource": {
    "url": "https://three.ws/api/x402/skill-marketplace",
    "tags": [
      "marketplace",
      "agent",
      "skills",
      "pricing",
      "discovery"
    ],
    "iconUrl": "https://three.ws/favicon.ico",
    "mimeType": "application/json",
    "description": "Skill Marketplace — list active skill listings with prices across all three.ws agents. Filter by skill name to find the cheapest provider for a given capability. Returns price atomics, chain, currency, trial offer, and time-pass terms.",
    "serviceName": "three.ws Skill Market"
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "type": "http",
          "method": "GET",
          "queryParams": {
            "limit": 20,
            "skill": "inspect_model"
          }
        },
        "output": {
          "type": "json",
          "example": {
            "count": 2,
            "cheapest": {
              "chain": "solana",
              "skill": "inspect_model",
              "agent_id": "7b9a4f30-2d11-4e2d-9d12-1cdb1f6a3a55",
              "agent_name": "Helios",
              "currency_mint": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
              "mint_decimals": 6,
              "amount_atomics": "10000"
            },
            "listings": [
              {
                "chain": "solana",
                "skill": "inspect_model",
                "agent_id": "7b9a4f30-2d11-4e2d-9d12-1cdb1f6a3a55",
                "agent_name": "Helios",
                "trial_uses": 1,
                "updated_at": "2026-05-12T08:00:00Z",
                "currency_mint": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
                "mint_decimals": 6,
                "amount_atomics": "10000",
                "time_pass_hours": 24,
                "time_pass_amount": "100000"
              }
            ],
            "indexed_at": "2026-05-14T17:00:00Z",
            "skill_filter": "inspect_model"
          }
        }
      },
      "schema": {
        "type": "object",
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "required": [
          "input"
        ],
        "properties": {
          "input": {
            "type": "object",
            "required": [
              "type",
              "method"
            ],
            "properties": {
              "type": {
                "type": "string",
                "const": "http"
              },
              "method": {
                "enum": [
                  "GET",
                  "HEAD",
                  "DELETE"
                ],
                "type": "string"
              },
              "queryParams": {
                "type": "object",
                "$schema": "https://json-schema.org/draft/2020-12/schema",
                "properties": {
                  "limit": {
                    "type": "integer",
                    "default": 50,
                    "maximum": 200,
                    "minimum": 1
                  },
                  "skill": {
                    "type": "string",
                    "description": "Filter to a specific skill name (e.g. \"inspect_model\"). Case-sensitive."
                  }
                }
              }
            },
            "additionalProperties": false
          },
          "output": {
            "type": "object",
            "required": [
              "type"
            ],
            "properties": {
              "type": {
                "type": "string"
              },
              "example": {
                "type": "object",
                "$schema": "https://json-schema.org/draft/2020-12/schema",
                "required": [
                  "count",
                  "listings"
                ],
                "properties": {
                  "count": {
                    "type": "integer"
                  },
                  "cheapest": {
                    "type": [
                      "object",
                      "null"
                    ]
                  },
                  "listings": {
                    "type": "array",
                    "items": {
                      "type": "object"
                    }
                  },
                  "indexed_at": {
                    "type": "string",
                    "format": "date-time"
                  },
                  "skill_filter": {
                    "type": [
                      "string",
                      "null"
                    ]
                  }
                }
              }
            }
          }
        }
      },
      "discoverable": true
    },
    "offer-receipt": {
      "info": {
        "offers": [
          {
            "format": "jws",
            "signature": "eyJhbGciOiJFZERTQSIsImtpZCI6ImRpZDp3ZWI6dGhyZWUud3Mja2V5LTEifQ.eyJhbW91bnQiOiIxMDAwIiwiYXNzZXQiOiJFUGpGV2RkNUF1ZnFTU3FlTTJxTjF4enliYXBDOEc0d0VHR2tad3lURHQxdiIsIm5ldHdvcmsiOiJzb2xhbmE6NWV5a3Q0VXNGdjhQOE5KZFRSRXBZMXZ6cUtxWkt2ZHAiLCJwYXlUbyI6Ind3d3d3RHhGV1JuN2dyZ3IzRXNyc2c1QzZOdkRvREhTQTRnYUNmZmNjclUiLCJyZXNvdXJjZVVybCI6Imh0dHBzOi8vdGhyZWUud3MvYXBpL3g0MDIvc2tpbGwtbWFya2V0cGxhY2UiLCJzY2hlbWUiOiJleGFjdCIsInZhbGlkVW50aWwiOjE3ODk5ODc4MjIsInZlcnNpb24iOjF9.VFOE62kYygxBIShh0zLqRZ1m0-BGqzmmo6cAFarF-qOovs87UdieuWhOxK4yz92x2OT9qtcAWitC5M9KH2mDBQ",
            "acceptIndex": 0
          },
          {
            "format": "jws",
            "signature": "eyJhbGciOiJFZERTQSIsImtpZCI6ImRpZDp3ZWI6dGhyZWUud3Mja2V5LTEifQ.eyJhbW91bnQiOiIxMDAwMDAwMCIsImFzc2V0IjoiRmVNYkRvWDdSMVBzYzRHRWN2SmRzYk5iWkEzYmZ6dGN5RENhdEpWSnB1bXAiLCJuZXR3b3JrIjoic29sYW5hOjVleWt0NFVzRnY4UDhOSmRUUkVwWTF2enFLcVpLdmRwIiwicGF5VG8iOiJ3d3d3d0R4RldSbjdncmdyM0VzcnNnNUM2TnZEb0RIU0E0Z2FDZmZjY3JVIiwicmVzb3VyY2VVcmwiOiJodHRwczovL3RocmVlLndzL2FwaS94NDAyL3NraWxsLW1hcmtldHBsYWNlIiwic2NoZW1lIjoiZXhhY3QiLCJ2YWxpZFVudGlsIjoxNzg5OTg3ODIyLCJ2ZXJzaW9uIjoxfQ.1bdC8eWncuoLg729XkIy-NE3pAgfVwhyNs3kzXH1B7AcfQfzqq4HQ3UYkoEKhaGe0lhWWFiccmqwNJooIX7XCQ",
            "acceptIndex": 1
          },
          {
            "format": "jws",
            "signature": "eyJhbGciOiJFZERTQSIsImtpZCI6ImRpZDp3ZWI6dGhyZWUud3Mja2V5LTEifQ.eyJhbW91bnQiOiIxMDAwIiwiYXNzZXQiOiIweDgzMzU4OWZDRDZlRGI2RTA4ZjRjN0MzMkQ0ZjcxYjU0YmRBMDI5MTMiLCJuZXR3b3JrIjoiZWlwMTU1Ojg0NTMiLCJwYXlUbyI6IjB4NDAyMmRlMmQzNmMzMzRlNzNjN2ExMDg4MDVjZWExMWMwNTY0ZjQwMiIsInJlc291cmNlVXJsIjoiaHR0cHM6Ly90aHJlZS53cy9hcGkveDQwMi9za2lsbC1tYXJrZXRwbGFjZSIsInNjaGVtZSI6ImV4YWN0IiwidmFsaWRVbnRpbCI6MTc4OTk4NzgyMiwidmVyc2lvbiI6MX0.7YUGnbp-R7wY8VMe8O1Ef4hq_hxwSxhfbmkkEsfSiF-i6A27hwvuDmRR6t5uhq2W0XJxTPRu2hYzEg1IuxaIDw",
            "acceptIndex": 2
          },
          {
            "format": "jws",
            "signature": "eyJhbGciOiJFZERTQSIsImtpZCI6ImRpZDp3ZWI6dGhyZWUud3Mja2V5LTEifQ.eyJhbW91bnQiOiIxMDAwIiwiYXNzZXQiOiIweDgzMzU4OWZDRDZlRGI2RTA4ZjRjN0MzMkQ0ZjcxYjU0YmRBMDI5MTMiLCJuZXR3b3JrIjoiZWlwMTU1Ojg0NTMiLCJwYXlUbyI6IjB4NDAyMmRlMmQzNmMzMzRlNzNjN2ExMDg4MDVjZWExMWMwNTY0ZjQwMiIsInJlc291cmNlVXJsIjoiaHR0cHM6Ly90aHJlZS53cy9hcGkveDQwMi9za2lsbC1tYXJrZXRwbGFjZSIsInNjaGVtZSI6ImV4YWN0IiwidmFsaWRVbnRpbCI6MTc4OTk4NzgyMiwidmVyc2lvbiI6MX0.7YUGnbp-R7wY8VMe8O1Ef4hq_hxwSxhfbmkkEsfSiF-i6A27hwvuDmRR6t5uhq2W0XJxTPRu2hYzEg1IuxaIDw",
            "acceptIndex": 3
          }
        ]
      },
      "schema": {
        "type": "object",
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "required": [
          "offers"
        ],
        "properties": {
          "offers": {
            "type": "array",
            "items": {
              "type": "object",
              "required": [
                "format",
                "signature"
              ],
              "properties": {
                "format": {
                  "type": "string"
                },
                "payload": {
                  "type": "object",
                  "required": [
                    "version",
                    "resourceUrl",
                    "scheme",
                    "network",
                    "asset",
                    "payTo",
                    "amount"
                  ],
                  "properties": {
                    "asset": {
                      "type": "string"
                    },
                    "payTo": {
                      "type": "string"
                    },
                    "amount": {
                      "type": "string"
                    },
                    "scheme": {
                      "type": "string"
                    },
                    "network": {
                      "type": "string"
                    },
                    "version": {
                      "type": "integer"
                    },
                    "validUntil": {
                      "type": "integer"
                    },
                    "resourceUrl": {
                      "type": "string"
                    }
                  }
                },
                "signature": {
                  "type": "string"
                },
                "acceptIndex": {
                  "type": "integer"
                }
              }
            }
          }
        }
      },
      "includeTxHash": false,
      "offerValiditySeconds": 60
    },
    "sign-in-with-x": {
      "info": {
        "uri": "https://three.ws/api/x402/skill-marketplace",
        "nonce": "0d7e826b6725361d30a7e4b81f0d079e",
        "domain": "three.ws",
        "version": "1",
        "issuedAt": "2026-09-21T10:45:22.496Z",
        "resources": [
          "https://three.ws/api/x402/skill-marketplace"
        ],
        "statement": "Sign in to refresh the three.ws skill marketplace without re-paying.",
        "expirationTime": "2026-09-21T10:50:22.496Z"
      },
      "schema": {
        "type": "object",
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "required": [
          "domain",
          "address",
          "uri",
          "version",
          "chainId",
          "type",
          "nonce",
          "issuedAt",
          "signature"
        ],
        "properties": {
          "uri": {
            "type": "string",
            "format": "uri"
          },
          "type": {
            "type": "string"
          },
          "nonce": {
            "type": "string"
          },
          "domain": {
            "type": "string"
          },
          "address": {
            "type": "string"
          },
          "chainId": {
            "type": "string"
          },
          "version": {
            "type": "string"
          },
          "issuedAt": {
            "type": "string",
            "format": "date-time"
          },
          "notBefore": {
            "type": "string",
            "format": "date-time"
          },
          "requestId": {
            "type": "string"
          },
          "resources": {
            "type": "array",
            "items": {
              "type": "string",
              "format": "uri"
            }
          },
          "signature": {
            "type": "string"
          },
          "statement": {
            "type": "string"
          },
          "expirationTime": {
            "type": "string",
            "format": "date-time"
          }
        }
      },
      "supportedChains": [
        {
          "type": "ed25519",
          "chainId": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp"
        },
        {
          "type": "eip191",
          "chainId": "eip155:8453"
        }
      ]
    },
    "payment-identifier": {
      "info": {
        "required": false
      },
      "schema": {
        "type": "object",
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "required": [
          "required"
        ],
        "properties": {
          "id": {
            "type": "string",
            "pattern": "^[a-zA-Z0-9_-]+$",
            "maxLength": 128,
            "minLength": 16
          },
          "required": {
            "type": "boolean"
          }
        }
      }
    },
    "eip2612GasSponsoring": {
      "info": {
        "version": "1",
        "description": "The facilitator accepts EIP-2612 gasless Permit to `Permit2` canonical contract."
      },
      "schema": {
        "type": "object",
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "required": [
          "from",
          "asset",
          "spender",
          "amount",
          "nonce",
          "deadline",
          "signature",
          "version"
        ],
        "properties": {
          "from": {
            "type": "string",
            "pattern": "^0x[a-fA-F0-9]{40}$",
            "description": "The address of the sender."
          },
          "asset": {
            "type": "string",
            "pattern": "^0x[a-fA-F0-9]{40}$",
            "description": "The address of the ERC-20 token contract."
          },
          "nonce": {
            "type": "string",
            "pattern": "^[0-9]+$",
            "description": "The current nonce of the sender."
          },
          "amount": {
            "type": "string",
            "pattern": "^[0-9]+$",
            "description": "The amount to approve (uint256). Typically MaxUint."
          },
          "spender": {
            "type": "string",
            "pattern": "^0x[a-fA-F0-9]{40}$",
            "description": "The address of the spender (Canonical Permit2)."
          },
          "version": {
            "type": "string",
            "pattern": "^[0-9]+(\\.[0-9]+)*$",
            "description": "Schema version identifier."
          },
          "deadline": {
            "type": "string",
            "pattern": "^[0-9]+$",
            "description": "The timestamp at which the signature expires."
          },
          "signature": {
            "type": "string",
            "pattern": "^0x[a-fA-F0-9]+$",
            "description": "The 65-byte concatenated signature (r, s, v) as a hex string."
          }
        }
      }
    },
    "erc20ApprovalGasSponsoring": {
      "info": {
        "version": "1",
        "description": "The facilitator broadcasts a pre-signed ERC-20 approve() transaction to grant Permit2 allowance."
      },
      "schema": {
        "type": "object",
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "required": [
          "from",
          "asset",
          "spender",
          "amount",
          "signedTransaction",
          "version"
        ],
        "properties": {
          "from": {
            "type": "string",
            "pattern": "^0x[a-fA-F0-9]{40}$",
            "description": "The address of the sender (token owner)."
          },
          "asset": {
            "type": "string",
            "pattern": "^0x[a-fA-F0-9]{40}$",
            "description": "The address of the ERC-20 token contract."
          },
          "amount": {
            "type": "string",
            "pattern": "^[0-9]+$",
            "description": "The amount approved (uint256). Always MaxUint256."
          },
          "spender": {
            "type": "string",
            "pattern": "^0x[a-fA-F0-9]{40}$",
            "description": "The address of the spender (Canonical Permit2)."
          },
          "version": {
            "type": "string",
            "pattern": "^[0-9]+(\\.[0-9]+)*$",
            "description": "Schema version identifier."
          },
          "signedTransaction": {
            "type": "string",
            "pattern": "^0x[a-fA-F0-9]+$",
            "description": "The RLP-encoded signed EIP-1559 transaction as a hex string."
          }
        }
      }
    }
  },
  "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 0x4022…4f402. The signed payment is good for 1 minute.

Paid to
0x4022…4f402
USD Coin contract
0x8335…02913
Payment window
1 minute
As published
1000 smallest units
0.001USDC≈ $0.001 USD
on Base · exact scheme

Pay 0.001 USDC on Base to 0x4022…4f402. The signed payment is good for 1 minute.

Paid to
0x4022…4f402
USD Coin contract
0x8335…02913
Payment window
1 minute
As published
1000 smallest units
1000units
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
wwwwwD…fccrU
Token contract
EPjFWd…TDt1v
Payment window
1 minute
10000000units
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
wwwwwD…fccrU
Token contract
FeMbDo…Jpump
Payment window
1 minute
The catalog’s raw entry
[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2",
      "decimals": 6
    },
    "payTo": "0x4022de2d36c334e73c7a108805cea11c0564f402",
    "amount": "1000",
    "scheme": "exact",
    "network": "eip155:8453",
    "resource": "https://three.ws/api/x402/skill-marketplace",
    "maxTimeoutSeconds": 60
  },
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2",
      "decimals": 6,
      "supportsEip2612": true,
      "assetTransferMethod": "permit2"
    },
    "payTo": "0x4022de2d36c334e73c7a108805cea11c0564f402",
    "amount": "1000",
    "scheme": "exact",
    "network": "eip155:8453",
    "resource": "https://three.ws/api/x402/skill-marketplace",
    "maxTimeoutSeconds": 60
  },
  {
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "extra": {
      "name": "USDC",
      "decimals": 6,
      "feePayer": "WwwuGbqHrwF5RG89KhUbmRWEvjnRH9k5kVM5p7T3WwW"
    },
    "payTo": "wwwwwDxFWRn7grgr3Esrsg5C6NvDoDHSA4gaCffccrU",
    "amount": "1000",
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "resource": "https://three.ws/api/x402/skill-marketplace",
    "maxTimeoutSeconds": 60
  },
  {
    "asset": "FeMbDoX7R1Psc4GEcvJdsbNbZA3bfztcyDCatJVJpump",
    "extra": {
      "name": "THREE",
      "decimals": 6,
      "feePayer": "WwwuGbqHrwF5RG89KhUbmRWEvjnRH9k5kVM5p7T3WwW"
    },
    "payTo": "wwwwwDxFWRn7grgr3Esrsg5C6NvDoDHSA4gaCffccrU",
    "amount": "10000000",
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "resource": "https://three.ws/api/x402/skill-marketplace",
    "maxTimeoutSeconds": 60
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "type": "http",
        "method": "GET",
        "queryParams": {
          "limit": 20,
          "skill": "inspect_model"
        }
      },
      "output": {
        "type": "json",
        "example": {
          "count": 2,
          "cheapest": {
            "chain": "solana",
            "skill": "inspect_model",
            "agent_id": "7b9a4f30-2d11-4e2d-9d12-1cdb1f6a3a55",
            "agent_name": "Helios",
            "currency_mint": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
            "mint_decimals": 6,
            "amount_atomics": "10000"
          },
          "listings": [
            {
              "chain": "solana",
              "skill": "inspect_model",
              "agent_id": "7b9a4f30-2d11-4e2d-9d12-1cdb1f6a3a55",
              "agent_name": "Helios",
              "trial_uses": 1,
              "updated_at": "2026-05-12T08:00:00Z",
              "currency_mint": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
              "mint_decimals": 6,
              "amount_atomics": "10000",
              "time_pass_hours": 24,
              "time_pass_amount": "100000"
            }
          ],
          "indexed_at": "2026-05-14T17:00:00Z",
          "skill_filter": "inspect_model"
        }
      }
    },
    "schema": {
      "type": "object",
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "required": [
        "input"
      ],
      "properties": {
        "input": {
          "type": "object",
          "required": [
            "type",
            "method"
          ],
          "properties": {
            "type": {
              "type": "string",
              "const": "http"
            },
            "method": {
              "enum": [
                "GET",
                "HEAD",
                "DELETE"
              ],
              "type": "string"
            },
            "queryParams": {
              "type": "object",
              "$schema": "https://json-schema.org/draft/2020-12/schema",
              "properties": {
                "limit": {
                  "type": "integer",
                  "default": 50,
                  "maximum": 200,
                  "minimum": 1
                },
                "skill": {
                  "type": "string",
                  "description": "Filter to a specific skill name (e.g. \"inspect_model\"). Case-sensitive."
                }
              }
            }
          },
          "additionalProperties": false
        },
        "output": {
          "type": "object",
          "required": [
            "type"
          ],
          "properties": {
            "type": {
              "type": "string"
            },
            "example": {
              "type": "object",
              "$schema": "https://json-schema.org/draft/2020-12/schema",
              "required": [
                "count",
                "listings"
              ],
              "properties": {
                "count": {
                  "type": "integer"
                },
                "cheapest": {
                  "type": [
                    "object",
                    "null"
                  ]
                },
                "listings": {
                  "type": "array",
                  "items": {
                    "type": "object"
                  }
                },
                "indexed_at": {
                  "type": "string",
                  "format": "date-time"
                },
                "skill_filter": {
                  "type": [
                    "string",
                    "null"
                  ]
                }
              }
            }
          }
        }
      }
    },
    "discoverable": true
  }
}

Provenance

Seen in the source catalog
2026-07-20 19:09Z
Last indexed by Roundhouse
2026-08-10 08:20Z
Last enriched (probe, favicon, geo)
2026-09-21 10:45Z
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

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 three.ws Skill Market 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=three.ws%20Skill%20Market'
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://three.ws/api/x402/skill-marketplace, 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.