Roundhouse AI

finanz.halowerk.com

Queries public crypto exchanges for one trading pair and returns each venue separately with its last price, bid, ask, spread in basis points, 24-hour high, low and volume, and the age of the value in milliseconds. On top of the raw quotes it computes what a single venue cannot tell you: the median across venues, the spread between the cheapest and dearest venue in basis points, and which venue is the outlier.

MediaLiveeip155:8453Exactvia cdp
https://finanz.halowerk.com/v1/quote-snapshot
Calls · 30d
1→ 0%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 18 snapshots so far.
$11.47
Verified settled volume
2,655 settlements proven x402 by their on-chain EIP-3009 marker.
$0.0050
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 2026-08-11 10:52Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x2880EdfFF13100677Bf97A3CBdF3Bc34771C4E5E

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.

{
  "docs": "https://finanz.halowerk.com/llms.txt",
  "name": "quote_snapshot",
  "error": "payment_required",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "asset": "USDC",
        "version": "2",
        "eip712Domain": {
          "name": "USD Coin",
          "chainId": 8453,
          "version": "2",
          "verifyingContract": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
        },
        "network_name": "Base Mainnet",
        "assetTransferMethod": "eip3009"
      },
      "payTo": "0x2880EdfFF13100677Bf97A3CBdF3Bc34771C4E5E",
      "amount": "5000",
      "scheme": "exact",
      "network": "eip155:8453",
      "maxTimeoutSeconds": 300
    }
  ],
  "pricing": "https://finanz.halowerk.com/pricing",
  "resource": {
    "url": "https://finanz.halowerk.com/v1/quote-snapshot",
    "mimeType": "application/json",
    "description": "Queries public crypto exchanges for one trading pair and returns each venue separately with its last price, bid, ask, spread in basis points, 24-hour high, low and volume, and the age of the value in milliseconds. On top of the raw quotes it computes what a single venue cannot tell you: the median across venues, the spread between the cheapest and dearest venue in basis points, and which venue is the outlier."
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "body": {
            "symbol": "BTC/USDT"
          },
          "type": "http",
          "method": "POST",
          "bodyType": "json"
        }
      },
      "schema": {
        "type": "object",
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "required": [
          "input"
        ],
        "properties": {
          "input": {
            "type": "object",
            "required": [
              "type",
              "method",
              "bodyType",
              "body"
            ],
            "properties": {
              "body": {
                "type": "object",
                "required": [
                  "symbol"
                ],
                "properties": {
                  "symbol": {
                    "type": "string",
                    "maxLength": 20,
                    "minLength": 3,
                    "description": "Pair as BASE/QUOTE, e.g. BTC/USDT or ETH/USD."
                  },
                  "venues": {
                    "type": "array",
                    "items": {
                      "enum": [
                        "binance",
                        "kraken",
                        "coinbase"
                      ],
                      "type": "string"
                    },
                    "description": "Which venues to ask. All of them if omitted."
                  }
                },
                "additionalProperties": false
              },
              "type": {
                "type": "string",
                "const": "http"
              },
              "method": {
                "enum": [
                  "POST",
                  "PUT",
                  "PATCH"
                ],
                "type": "string"
              },
              "bodyType": {
                "enum": [
                  "json",
                  "form-data",
                  "text"
                ],
                "type": "string"
              }
            },
            "additionalProperties": false
          }
        }
      }
    }
  },
  "price_usdc": "0.005",
  "description": "Queries public crypto exchanges for one trading pair and returns each venue separately with its last price, bid, ask, spread in basis points, 24-hour high, low and volume, and the age of the value in milliseconds. On top of the raw quotes it computes what a single venue cannot tell you: the median across venues, the spread between the cheapest and dearest venue in basis points, and which venue is the outlier. A venue that fails is named with its reason instead of quietly dropping out of the average. Strictly crypto-native by design: quotes from regulated exchanges are licensed data and are deliberately not served here, so equities, funds, commodities and FX are out of scope. Not investment advice and not an execution price.",
  "inputSchema": {
    "type": "object",
    "required": [
      "symbol"
    ],
    "properties": {
      "symbol": {
        "type": "string",
        "maxLength": 20,
        "minLength": 3,
        "description": "Pair as BASE/QUOTE, e.g. BTC/USDT or ETH/USD."
      },
      "venues": {
        "type": "array",
        "items": {
          "enum": [
            "binance",
            "kraken",
            "coinbase"
          ],
          "type": "string"
        },
        "description": "Which venues to ask. All of them if omitted."
      }
    },
    "additionalProperties": false
  },
  "price_model": "per_call",
  "x402Version": 2,
  "instructions": "Sign the accepted terms with an x402 client and repeat the request with the payment header.",
  "payment_header": "PAYMENT-SIGNATURE",
  "capability_request": {
    "url": "https://bedarf.halowerk.com/capabilities/request",
    "cost": "free",
    "method": "POST",
    "description": "Missing a capability, or does the scope not fit? Report the need here - no payment required. Similar reports are bundled; the response returns an id you can check back on.",
    "body_example": {
      "max_price": 0.01,
      "description": "what exactly is needed",
      "requested_capability": "short label"
    }
  }
}

Accepts

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

0.005USDC≈ $0.005 USD
on Base · exact scheme

Pay 0.005 USDC on Base to 0x2880…C4E5E. The signed payment is good for 5 minutes.

Paid to
0x2880…C4E5E
USD Coin contract
0x8335…02913
Payment window
5 minutes
As published
5000 smallest units
The catalog’s raw entry
[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "asset": "USDC",
      "version": "2",
      "eip712Domain": {
        "name": "USD Coin",
        "chainId": 8453,
        "version": "2",
        "verifyingContract": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
      },
      "network_name": "Base Mainnet",
      "assetTransferMethod": "eip3009"
    },
    "payTo": "0x2880EdfFF13100677Bf97A3CBdF3Bc34771C4E5E",
    "amount": "5000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 300
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "body": {
          "symbol": "BTC/USDT"
        },
        "type": "http",
        "method": "POST",
        "bodyType": "json"
      }
    },
    "schema": {
      "type": "object",
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "required": [
        "input"
      ],
      "properties": {
        "input": {
          "type": "object",
          "required": [
            "type",
            "method",
            "bodyType",
            "body"
          ],
          "properties": {
            "body": {
              "type": "object",
              "required": [
                "symbol"
              ],
              "properties": {
                "symbol": {
                  "type": "string",
                  "maxLength": 20,
                  "minLength": 3,
                  "description": "Pair as BASE/QUOTE, e.g. BTC/USDT or ETH/USD."
                },
                "venues": {
                  "type": "array",
                  "items": {
                    "enum": [
                      "binance",
                      "kraken",
                      "coinbase"
                    ],
                    "type": "string"
                  },
                  "description": "Which venues to ask. All of them if omitted."
                }
              },
              "additionalProperties": false
            },
            "type": {
              "type": "string",
              "const": "http"
            },
            "method": {
              "enum": [
                "POST",
                "PUT",
                "PATCH"
              ],
              "type": "string"
            },
            "bodyType": {
              "enum": [
                "json",
                "form-data",
                "text"
              ],
              "type": "string"
            }
          },
          "additionalProperties": false
        }
      }
    }
  }
}

Provenance

Seen in the source catalog
2026-08-11 10:52Z
Last indexed by Roundhouse
2026-09-10 10:30Z
Last enriched (probe, favicon, geo)
2026-09-24 11:15Z
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. 18 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 finanz.halowerk.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=finanz.halowerk.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://finanz.halowerk.com/v1/quote-snapshot, 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.