Roundhouse

FXRate by YourAITools

Exchange rates API for AI agents. Every ECB reference rate for a base currency (or just the quotes you list) on the latest or a past date. Search intents: exchange rates api, fx rates table, currency rates today, usd exchange rates, ecb reference rates.

SearchLiveeip155:8453Exactvia cdp
https://api.youraitools.co/fx/v1/rates
Currency-converterExchange-ratesFxForexFinance-data
Calls · 30d
2
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 4 snapshots so far.
$256.05
Verified settled volume
225 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 2026-10-25 02:37Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x3c1A1E01e790Cd326495631B3b38Bd7068F08d6F

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": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0x3c1A1E01e790Cd326495631B3b38Bd7068F08d6F",
      "scheme": "exact",
      "network": "base",
      "mimeType": "application/json",
      "resource": "https://api.youraitools.co/fx/v1/rates",
      "description": "Exchange rates API for AI agents. Every ECB reference rate for a base currency (or just the quotes you list) on the latest or a past date. Search intents: exchange rates api, fx rates table, currency rates today, usd exchange rates, ecb reference rates.",
      "outputSchema": {
        "input": {
          "type": "http",
          "method": "GET",
          "queryParams": {
            "base": {
              "type": "string",
              "required": false,
              "description": "Base currency (default EUR): ISO 4217 code, e.g. USD, EUR, GBP, JPY (31 supported)"
            },
            "date": {
              "type": "string",
              "required": false,
              "description": "Optional YYYY-MM-DD (default: latest). Weekends/holidays use the previous ECB rate."
            },
            "quotes": {
              "type": "string",
              "required": false,
              "description": "Optional comma-separated currency codes (default: all 30)"
            }
          },
          "discoverable": true
        },
        "output": {
          "base": "USD",
          "date": "2026-10-23",
          "count": 3,
          "rates": {
            "EUR": 0.89342,
            "GBP": 0.74805,
            "JPY": 156.8
          },
          "source": "Source: ECB statistics (euro foreign exchange reference rates), via the open-source Frankfurter API.",
          "derived": true
        }
      },
      "maxAmountRequired": "1000",
      "maxTimeoutSeconds": 120
    }
  ],
  "message": "Payment required: FXRate GET /fx/v1/rates costs $0.001 per call in USDC. Currency converter and exchange rate API for AI agents: convert an amount between 31 currencies (USD, EUR, GBP, JPY, CNY, INR...) at the official European Central Bank reference rate, a rate table for any base currency, or a daily history back to 1999. Pay per call in USDC with any x402 client: read the PAYMENT-REQUIRED header (x402 v2) or the accepts list in this body (x402 v1), sign the payment and retry the same request with the PAYMENT-SIGNATURE (v2) or X-PAYMENT (v1) header. Networks: Base, Polygon, Arbitrum. No account, no API key. No crypto wallet? Buy prepaid credits by card or USDC at https://api.youraitools.co/credits/ and send them as a Bearer key. Free: 30 calls/day (remote MCP: convert_currency, fx_rates, fx_history), then $0.001 per call in USDC",
  "x402Version": 1,
  "payment_help": {
    "docs": "https://api.youraitools.co/fx/",
    "tool": "FXRate",
    "what": "Currency converter and exchange rate API for AI agents: convert an amount between 31 currencies (USD, EUR, GBP, JPY, CNY, INR...) at the official European Central Bank reference rate, a rate table for any base currency, or a daily history back to 1999. Source: ECB statistics. Reference rates, not live trading quotes.",
    "price": "$0.001 per call (USDC)",
    "route": "GET https://api.youraitools.co/fx/v1/rates",
    "mcp_hub": "https://api.youraitools.co/mcp/hub",
    "free_tier": "30 calls/day (remote MCP: convert_currency, fx_rates, fx_history), then $0.001 per call in USDC",
    "pay_with_x402": "Pay per call in USDC with any x402 client: read the PAYMENT-REQUIRED header (x402 v2) or the accepts list in this body (x402 v1), sign the payment and retry the same request with the PAYMENT-SIGNATURE (v2) or X-PAYMENT (v1) header. Networks: Base, Polygon, Arbitrum. No account, no API key.",
    "pay_with_credits": {
      "url": "https://api.youraitools.co/credits/",
      "use": "Send the key as Authorization: Bearer yatc_... on the same request; each call is deducted at the listed price.",
      "card": "Pay by card (Stripe): $5, $20 or $50 credit packs, no crypto wallet needed.",
      "wallet": "Or buy $1 or $5 of credits in USDC with the one-click browser wallet button on the same page.",
      "card_checkout": "https://api.youraitools.co/credits/ (choose a pack under Pay by card; Stripe checkout opens in one click)"
    }
  }
}

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 0x3c1A…08d6F. The signed payment is good for 2 minutes.

Paid to
0x3c1A…08d6F
USD Coin contract
0x8335…02913
Payment window
2 minutes
As published
1000 smallest units
1000units
on Polygon · 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
0x3c1A…08d6F
Token contract
0x3c49…c3359
Payment window
2 minutes
1000units
on Arbitrum · 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
0x3c1A…08d6F
Token contract
0xaf88…e5831
Payment window
2 minutes
The catalog’s raw entry
[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0x3c1A1E01e790Cd326495631B3b38Bd7068F08d6F",
    "amount": "1000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 120
  },
  {
    "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0x3c1A1E01e790Cd326495631B3b38Bd7068F08d6F",
    "amount": "1000",
    "scheme": "exact",
    "network": "eip155:137",
    "maxTimeoutSeconds": 120
  },
  {
    "asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0x3c1A1E01e790Cd326495631B3b38Bd7068F08d6F",
    "amount": "1000",
    "scheme": "exact",
    "network": "eip155:42161",
    "maxTimeoutSeconds": 120
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "type": "http",
        "method": "GET",
        "queryParams": {
          "base": "USD",
          "quotes": "EUR,GBP,JPY"
        }
      },
      "output": {
        "type": "json",
        "example": {
          "base": "USD",
          "date": "2026-10-23",
          "count": 3,
          "rates": {
            "EUR": 0.89342,
            "GBP": 0.74805,
            "JPY": 156.8
          },
          "source": "Source: ECB statistics (euro foreign exchange reference rates), via the open-source Frankfurter API.",
          "derived": true
        }
      }
    },
    "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",
                  "description": "Base currency (default EUR): ISO 4217 code, e.g. USD, EUR, GBP, JPY (31 supported)"
                },
                "date": {
                  "type": "string",
                  "description": "Optional YYYY-MM-DD (default: latest). Weekends/holidays use the previous ECB rate."
                },
                "quotes": {
                  "type": "string",
                  "description": "Optional comma-separated currency codes (default: all 30)"
                }
              },
              "description": "Search intents: exchange rates api, fx rates table, currency rates today, usd exchange rates, ecb reference rates"
            }
          },
          "additionalProperties": false
        },
        "output": {
          "type": "object",
          "required": [
            "type"
          ],
          "properties": {
            "type": {
              "type": "string"
            },
            "example": {
              "type": "object",
              "required": [
                "base",
                "date",
                "rates"
              ],
              "properties": {
                "base": {
                  "type": "string"
                },
                "date": {
                  "type": "string"
                },
                "count": {
                  "type": "integer"
                },
                "rates": {
                  "type": "object",
                  "additionalProperties": {
                    "type": "number"
                  }
                },
                "source": {
                  "type": "string"
                },
                "derived": {
                  "type": "boolean"
                }
              }
            }
          }
        }
      }
    }
  }
}

Provenance

Seen in the source catalog
2026-10-26 16:42Z
Last indexed by Roundhouse
2026-10-26 17:20Z
Last enriched (probe, favicon, geo)
2026-10-26 12:15Z
x402 version
2
Max timeout
120s
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. 4 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 FXRate by YourAITools 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=FXRate%20by%20YourAITools'
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://api.youraitools.co/fx/v1/rates, 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. Either pay over x402 (mint a personal key for $0.01 at
GET https://api.roundhouseai.io/v0/test/x402), or ask me for an organization key, which I create at
https://roundhouseai.io/dashboard/connections. If you have neither, ask before going further.

If you do not have Roundhouse tools or skills installed, read
https://roundhouseai.io/skill.md first — it is the whole procedure.