Roundhouse AI

the-stall.intuitek.ai

Historical ECB exchange rates — single date lookup or time-series range. Returns rates for up to 30 major currencies (EUR, GBP, JPY, CAD, CHF, CNY, AUD, KRW, etc.) from 1999-01-04 to present. Free, no key, sourced from Frankfurter/ECB. Use for: tax-date FX rates, historical expense reconciliation, multi-year trend analysis, point-in-time currency conversion. Weekends and holidays return the nearest prior business day. Complements forex-rates (real-time) with retrospective data.

DataLiveeip155:8453Exactvia cdp
https://the-stall.intuitek.ai/cap/forex-historical
Settlements · 30d
134↓ 15%
No per-endpoint history for this service yet, so this is payments indexed to its PROVIDER's wallet over 30 days.
$191.67
Verified settled volume
3,683 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 2026-06-18 06:26Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x03d773c52B67993e60Ecb3134b17436fE03B584c

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": "0x03d773c52B67993e60Ecb3134b17436fE03B584c",
      "amount": "59000",
      "scheme": "exact",
      "network": "eip155:8453",
      "maxTimeoutSeconds": 300
    }
  ],
  "resource": {
    "url": "https://the-stall.intuitek.ai/cap/forex-historical",
    "mimeType": "application/json",
    "description": "Historical ECB exchange rates — single date lookup or time-series range. Returns rates for up to 30 major currencies (EUR, GBP, JPY, CAD, CHF, CNY, AUD, KRW, etc.) from 1999-01-04 to present. Free, no key, sourced from Frankfurter/ECB. Use for: tax-date FX rates, historical expense reconciliation, multi-year trend analysis, point-in-time currency conversion. Weekends and holidays return the nearest prior business day. Complements forex-rates (real-time) with retrospective data."
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "type": "http",
          "method": "GET",
          "queryParams": {}
        }
      },
      "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": [],
                "properties": {
                  "base": {
                    "type": "string",
                    "default": "USD",
                    "description": "Base currency ISO 4217 (e.g. USD, EUR, GBP). Default: USD."
                  },
                  "date": {
                    "type": "string",
                    "description": "Date in YYYY-MM-DD format (e.g. '2023-03-15'). Use 'latest' for today's ECB rate. Historical data available from 1999-01-04."
                  },
                  "convert": {
                    "type": "object",
                    "required": [],
                    "properties": {
                      "to": {
                        "type": "string"
                      },
                      "from": {
                        "type": "string"
                      },
                      "amount": {
                        "type": "number"
                      }
                    },
                    "description": "Optional point-in-time conversion. E.g. {amount: 1000, from: 'USD', to: 'EUR'} at the requested date."
                  },
                  "symbols": {
                    "type": "array",
                    "items": {
                      "type": "string"
                    },
                    "description": "Specific currencies to return (e.g. ['EUR','GBP','JPY']). Omit for all 30 supported currencies."
                  },
                  "end_date": {
                    "type": "string",
                    "description": "Optional end date YYYY-MM-DD for a time-series range. Max recommended range: 365 days. Returns rates keyed by date."
                  }
                },
                "additionalProperties": false
              }
            },
            "additionalProperties": false
          }
        }
      }
    }
  },
  "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.

0.005USDC≈ $0.005 USD
on Base · exact scheme

Pay 0.005 USDC on Base to 0x03d7…B584c. The signed payment is good for 5 minutes.

Paid to
0x03d7…B584c
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",
      "version": "2"
    },
    "payTo": "0x03d773c52B67993e60Ecb3134b17436fE03B584c",
    "amount": "5000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 300
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "type": "http",
        "method": "GET",
        "queryParams": {
          "date": "example"
        }
      }
    },
    "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": [
                "date"
              ],
              "properties": {
                "base": {
                  "type": "string",
                  "default": "USD",
                  "description": "Base currency ISO 4217 (e.g. USD, EUR, GBP). Default: USD."
                },
                "date": {
                  "type": "string",
                  "description": "Date in YYYY-MM-DD format (e.g. '2023-03-15'). Use 'latest' for today's ECB rate. Historical data available from 1999-01-04."
                },
                "convert": {
                  "type": "object",
                  "required": [
                    "amount",
                    "from",
                    "to"
                  ],
                  "properties": {
                    "to": {
                      "type": "string"
                    },
                    "from": {
                      "type": "string"
                    },
                    "amount": {
                      "type": "number"
                    }
                  },
                  "description": "Optional point-in-time conversion. E.g. {amount: 1000, from: 'USD', to: 'EUR'} at the requested date."
                },
                "symbols": {
                  "type": "array",
                  "items": {
                    "type": "string"
                  },
                  "description": "Specific currencies to return (e.g. ['EUR','GBP','JPY']). Omit for all 30 supported currencies."
                },
                "end_date": {
                  "type": "string",
                  "description": "Optional end date YYYY-MM-DD for a time-series range. Max recommended range: 365 days. Returns rates keyed by date."
                }
              },
              "additionalProperties": false
            }
          },
          "additionalProperties": false
        }
      }
    }
  }
}

Provenance

Seen in the source catalog
2026-06-18 06:26Z
Last indexed by Roundhouse
2026-07-18 06:20Z
Last enriched (probe, favicon, geo)
2026-09-20 15:15Z
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

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 the-stall.intuitek.ai 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=the-stall.intuitek.ai'
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://the-stall.intuitek.ai/cap/forex-historical, 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.