Roundhouse

k2so.wrong.systems

Deterministic procedure for an agent deciding whether to settle an x402 payment on the public rail or through a privacy-preserving path (stealth address, relay, private mempool, facilitator privacy mode), and how to retain verifiable audit evidence when the on-chain trail is intentionally hidden. Inputs: payment purpose, counterparty relationship, sensitivity class of intent, audit obligations, facilitator privacy support, evidence requirements. Checks: (1) intent sensitivity, classify what the

Otheroffline · HTTP 525eip155:8453Exactvia cdp
https://k2so.wrong.systems/api/services/agent-payment-privacy-decision-procedure-when-sh
x402AgentPrivacySettlementProcedure
Calls · 30d
1→ 0%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 10 snapshots so far.
$13.12
Verified settled volume
3,393 settlements proven x402 by their on-chain EIP-3009 marker.
$0.0020
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 2026-08-10 17:22Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0xc85f0CF16F5e677bBE5dFc94662Cc86F2FbA0604

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.

{
  "code": "missing_payment",
  "hint": "Pay with an x402 client (Base USDC exact) or an MPP wallet (Tempo USDC.e/pathUSD), then retry with PAYMENT-SIGNATURE or Authorization: Payment. Metadata also in PAYMENT-REQUIRED header. Free contract: ?meta=1",
  "name": "agent payment privacy path decision procedure",
  "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
  "error": "payment_required",
  "payTo": "0xc85f0CF16F5e677bBE5dFc94662Cc86F2FbA0604",
  "price": "$0.002 USDC per call",
  "network": "eip155:8453",
  "pricing": {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "scheme": "exact",
    "network": "eip155:8453",
    "perCall": true,
    "currency": "USDC",
    "amountUsdc": "0.002",
    "networkName": "Base",
    "amountAtomic": "2000"
  },
  "service": "agent-payment-privacy-decision-procedure-when-sh",
  "currency": "USDC",
  "provider": "K-2SO",
  "priceUsdc": "0.002",
  "protocols": [
    "x402",
    "mpp"
  ],
  "description": "Deterministic procedure for an agent deciding whether to settle an x402 payment on the public rail or through a privacy-preserving path (stealth address, relay, private mempool, facilitator privacy mode), and how to retain verifiable audit evidence when the on-chain trail is intentionally hidden. Inputs: payment purpose, counterparty relationship, sensitivity class of intent, audit obligations, facilitator privacy support, evidence requirements. Checks: (1) intent sensitivity, classify what the payment reveals about strategy, timing, or counterparties; (2) audit floor, mandatory evidence fields (quote hash, signed receipt, deliverable hash, timestamps) that must survive even when the tx is hidden; (3) counterparty trust, known vs unknown payTo, blast radius of revealing the relationship; (4) rail capability, does the chosen privacy path support receipts, refunds, and facilitator escalation; (5) reversion rule, private path converts to public evidence trail when dispute or refund requires it; (6) retention, keep off-chain signed evidence with the same chain-of-custody rules as a public tx. Output: PRIVATE, PUBLIC, or HYBRID verdict with the exact evidence set to retain. Kill criteria: no refund path on private rail, audit obligation without evidence substitute, facilitator with no dispute surface.",
  "inputSchema": {
    "type": "object",
    "title": "agent payment privacy path decision procedure query parameters",
    "$schema": "https://json-schema.org/draft/2020-12/schema",
    "properties": {
      "meta": {
        "enum": [
          "0",
          "1"
        ],
        "type": "string",
        "description": "Set to 1 for free metadata JSON (no payment required)"
      }
    },
    "additionalProperties": false
  },
  "networkName": "Base",
  "x402Version": 2,
  "outputSchema": {
    "type": "object",
    "title": "agent payment privacy path decision procedure paid response",
    "$schema": "https://json-schema.org/draft/2020-12/schema",
    "required": [
      "ok",
      "paid",
      "service",
      "provider",
      "result"
    ],
    "properties": {
      "ok": {
        "type": "boolean"
      },
      "paid": {
        "type": "boolean"
      },
      "result": {
        "type": "object",
        "required": [
          "ok",
          "service"
        ],
        "properties": {
          "ok": {
            "type": "boolean",
            "description": "Handler success"
          },
          "payload": {
            "type": "object"
          },
          "service": {
            "type": "string",
            "description": "Service slug"
          },
          "generatedAt": {
            "type": "string",
            "description": "ISO-8601 timestamp"
          }
        }
      },
      "payment": {
        "type": "object",
        "properties": {
          "code": {
            "type": "string"
          },
          "payer": {
            "type": "string"
          },
          "detail": {
            "type": "string"
          },
          "selfPay": {
            "type": "boolean"
          },
          "transaction": {
            "type": "string"
          }
        }
      },
      "service": {
        "type": "string"
      },
      "provider": {
        "type": "string",
        "const": "K-2SO"
      }
    }
  },
  "verifyDetail": "missing PAYMENT-SIGNATURE"
}

Accepts

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

0.002USDC≈ $0.002 USD
on Base · exact scheme

Pay 0.002 USDC on Base to 0xc85f…A0604. The signed payment is good for 5 minutes.

Paid to
0xc85f…A0604
USD Coin contract
0x8335…02913
Payment window
5 minutes
As published
2000 smallest units
The catalog’s raw entry
[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0xc85f0CF16F5e677bBE5dFc94662Cc86F2FbA0604",
    "amount": "2000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 300
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "type": "http",
        "method": "GET",
        "queryParams": {
          "meta": "0"
        }
      },
      "output": {
        "type": "json",
        "example": {
          "ok": true,
          "paid": true,
          "result": {
            "ok": true,
            "payload": {
              "key": "value"
            },
            "service": "agent-payment-privacy-decision-procedure-when-sh",
            "generatedAt": "2026-01-01T00:00:00.000Z"
          },
          "service": "agent-payment-privacy-decision-procedure-when-sh",
          "provider": "K-2SO"
        }
      }
    },
    "schema": {
      "type": "object",
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "required": [
        "input"
      ],
      "properties": {
        "input": {
          "type": "object",
          "required": [
            "type",
            "method"
          ],
          "properties": {
            "type": {
              "type": "string",
              "const": "http"
            },
            "method": {
              "enum": [
                "GET",
                "HEAD",
                "DELETE"
              ],
              "type": "string"
            },
            "queryParams": {
              "type": "object",
              "properties": {
                "meta": {
                  "enum": [
                    "0",
                    "1"
                  ],
                  "type": "string",
                  "description": "Set to 1 for free metadata JSON (no payment required)"
                }
              }
            }
          },
          "additionalProperties": false
        },
        "output": {
          "type": "object",
          "required": [
            "type"
          ],
          "properties": {
            "type": {
              "type": "string"
            },
            "example": {
              "type": "object",
              "title": "agent payment privacy path decision procedure paid response",
              "$schema": "https://json-schema.org/draft/2020-12/schema",
              "required": [
                "ok",
                "paid",
                "service",
                "provider",
                "result"
              ],
              "properties": {
                "ok": {
                  "type": "boolean"
                },
                "paid": {
                  "type": "boolean"
                },
                "result": {
                  "type": "object",
                  "required": [
                    "ok",
                    "service"
                  ],
                  "properties": {
                    "ok": {
                      "type": "boolean",
                      "description": "Handler success"
                    },
                    "payload": {
                      "type": "object"
                    },
                    "service": {
                      "type": "string",
                      "description": "Service slug"
                    },
                    "generatedAt": {
                      "type": "string",
                      "description": "ISO-8601 timestamp"
                    }
                  }
                },
                "payment": {
                  "type": "object",
                  "properties": {
                    "code": {
                      "type": "string"
                    },
                    "payer": {
                      "type": "string"
                    },
                    "detail": {
                      "type": "string"
                    },
                    "selfPay": {
                      "type": "boolean"
                    },
                    "transaction": {
                      "type": "string"
                    }
                  }
                },
                "service": {
                  "type": "string"
                },
                "provider": {
                  "type": "string",
                  "const": "K-2SO"
                }
              }
            }
          }
        }
      }
    }
  }
}

Provenance

Seen in the source catalog
2026-08-10 17:22Z
Last indexed by Roundhouse
2026-08-29 00:20Z
Last enriched (probe, favicon, geo)
2026-09-23 17:15Z
x402 version
2
Max timeout
300s
Liveness probe
HTTP 525
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. 10 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 k2so.wrong.systems 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=k2so.wrong.systems'
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://k2so.wrong.systems/api/services/agent-payment-privacy-decision-procedure-when-sh, 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.