Roundhouse AI

Eckari

European Central Bank euro foreign exchange reference rate for a pair - the official daily fix used for accounting, invoicing and reporting - latest or any date in the last 90 days. The ECB publishes EUR/XXX only, so inverse and cross rates are computed from the same fix and named in rate_derivation. One fix per TARGET working day, not a tradable market rate. Use when: Convert or report an amount at an official daily rate both sides of a contract can verify against the ECB.

DataLiveeip155:8453Exactvia cdp
https://api.eckari.com/v1/fx/reference-rate
FxEcbExchange-rateReference-rateFinance
Calls · 30d
1↓ 81%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 30 snapshots so far.
$0.54
Verified settled volume
159 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 2026-08-27 22:36Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x9d6b6fdB04040a55d58B24ff4C90C08cf6083C8f

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.

{
  "x402": {
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x9d6b6fdB04040a55d58B24ff4C90C08cf6083C8f",
        "amount": "2000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 60
      }
    ],
    "resource": {
      "url": "https://api.eckari.com/v1/fx/reference-rate",
      "tags": [
        "fx",
        "ecb",
        "exchange-rate",
        "reference-rate",
        "finance"
      ],
      "iconUrl": "https://eckari.com/icon-512.png",
      "mimeType": "application/json",
      "description": "European Central Bank euro foreign exchange reference rate for a pair - the official daily fix used for accounting, invoicing and reporting - latest or any date in the last 90 days. The ECB publishes EUR/XXX only, so inverse and cross rates are computed from the same fix and named in rate_derivation. One fix per TARGET working day, not a tradable market rate. Use when: Convert or report an amount at an official daily rate both sides of a contract can verify against the ECB.",
      "serviceName": "Eckari"
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "type": "http",
            "method": "GET",
            "queryParams": {
              "base": "EUR",
              "quote": "USD"
            }
          },
          "output": {
            "type": "json",
            "example": {
              "data": {
                "base": "EUR",
                "note": "no ECB fix published for today yet (weekend, TARGET closing day, or before the ~16:00 CET publication); the latest published fix is returned",
                "rate": "1.159300",
                "quote": "USD",
                "rate_date": "2026-08-17",
                "rate_kind": "reference",
                "rate_derivation": "published",
                "published_pairs_used": [
                  "EUR/USD"
                ]
              },
              "meta": {
                "source": "ecb_fx",
                "version": "2.1.0",
                "freshness": "near_live",
                "capability": "fx.reference_rate"
              }
            }
          }
        },
        "schema": {
          "type": "object",
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "required": [
            "input"
          ],
          "properties": {
            "input": {
              "type": "object",
              "required": [
                "type",
                "method"
              ],
              "properties": {
                "type": {
                  "type": "string",
                  "const": "http"
                },
                "method": {
                  "enum": [
                    "GET",
                    "HEAD",
                    "DELETE"
                  ],
                  "type": "string"
                },
                "queryParams": {
                  "type": "object",
                  "required": [
                    "base",
                    "quote"
                  ],
                  "properties": {
                    "base": {
                      "type": "string",
                      "pattern": "^[A-Za-z]{3}$",
                      "description": "ISO 4217 code of the base currency. EUR is always available; other currencies must be in the ECB reference rate list for the selected date."
                    },
                    "date": {
                      "type": "string",
                      "pattern": "^[0-9]{4}-[0-9]{2}-[0-9]{2}$",
                      "description": "Optional ISO calendar date (YYYY-MM-DD) within the last 90 days. When the ECB published no fix on that date (a TARGET closing day), the latest prior fix is returned with a note."
                    },
                    "quote": {
                      "type": "string",
                      "pattern": "^[A-Za-z]{3}$",
                      "description": "ISO 4217 code of the quote currency. EUR is always available; other currencies must be in the ECB reference rate list for the selected date."
                    }
                  },
                  "additionalProperties": false
                }
              },
              "additionalProperties": false
            },
            "output": {
              "type": "object",
              "required": [
                "type"
              ],
              "properties": {
                "type": {
                  "type": "string"
                },
                "example": {
                  "type": "object"
                }
              }
            }
          }
        },
        "routeTemplate": "/v1/fx/reference-rate"
      },
      "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"
            }
          }
        }
      }
    },
    "x402Version": 2
  },
  "error": {
    "code": "PAYMENT_REQUIRED",
    "details": {
      "rail": "x402",
      "price": "0.002",
      "network": "eip155:8453",
      "currency": "USD",
      "input_validation": {
        "code": "INVALID_INPUT",
        "issues": [
          {
            "path": "base",
            "message": "Invalid input: expected string, received undefined"
          },
          {
            "path": "quote",
            "message": "Invalid input: expected string, received undefined"
          }
        ],
        "message": "Input validation failed"
      }
    },
    "message": "Payment required. Retry with a valid payment proof header. Note: the request input is also invalid; see details.input_validation.",
    "request_id": "req_ba80fffc46fbf786338ac7c0"
  }
}

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 0x9d6b…83C8f. The signed payment is good for 1 minute.

Paid to
0x9d6b…83C8f
USD Coin contract
0x8335…02913
Payment window
1 minute
As published
2000 smallest units
The catalog’s raw entry
[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0x9d6b6fdB04040a55d58B24ff4C90C08cf6083C8f",
    "amount": "2000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 60
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "type": "http",
        "method": "GET",
        "queryParams": {
          "base": "EUR",
          "quote": "USD"
        }
      },
      "output": {
        "type": "json",
        "example": {
          "data": {
            "base": "EUR",
            "note": "no ECB fix published for today yet (weekend, TARGET closing day, or before the ~16:00 CET publication); the latest published fix is returned",
            "rate": "1.159300",
            "quote": "USD",
            "rate_date": "2026-08-17",
            "rate_kind": "reference",
            "rate_derivation": "published",
            "published_pairs_used": [
              "EUR/USD"
            ]
          },
          "meta": {
            "source": "ecb_fx",
            "version": "2.1.0",
            "freshness": "near_live",
            "capability": "fx.reference_rate"
          }
        }
      }
    },
    "schema": {
      "type": "object",
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "required": [
        "input"
      ],
      "properties": {
        "input": {
          "type": "object",
          "required": [
            "type",
            "method"
          ],
          "properties": {
            "type": {
              "type": "string",
              "const": "http"
            },
            "method": {
              "enum": [
                "GET",
                "HEAD",
                "DELETE"
              ],
              "type": "string"
            },
            "queryParams": {
              "type": "object",
              "required": [
                "base",
                "quote"
              ],
              "properties": {
                "base": {
                  "type": "string",
                  "pattern": "^[A-Za-z]{3}$",
                  "description": "ISO 4217 code of the base currency. EUR is always available; other currencies must be in the ECB reference rate list for the selected date."
                },
                "date": {
                  "type": "string",
                  "pattern": "^[0-9]{4}-[0-9]{2}-[0-9]{2}$",
                  "description": "Optional ISO calendar date (YYYY-MM-DD) within the last 90 days. When the ECB published no fix on that date (a TARGET closing day), the latest prior fix is returned with a note."
                },
                "quote": {
                  "type": "string",
                  "pattern": "^[A-Za-z]{3}$",
                  "description": "ISO 4217 code of the quote currency. EUR is always available; other currencies must be in the ECB reference rate list for the selected date."
                }
              },
              "additionalProperties": false
            }
          },
          "additionalProperties": false
        },
        "output": {
          "type": "object",
          "required": [
            "type"
          ],
          "properties": {
            "type": {
              "type": "string"
            },
            "example": {
              "type": "object"
            }
          }
        }
      }
    },
    "routeTemplate": "/v1/fx/reference-rate"
  },
  "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"
        }
      }
    }
  }
}

Provenance

Seen in the source catalog
2026-08-27 22:36Z
Last indexed by Roundhouse
2026-09-26 15:30Z
Last enriched (probe, favicon, geo)
2026-09-23 21:45Z
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

This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 30 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 Eckari 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=Eckari'
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.eckari.com/v1/fx/reference-rate, 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.