Historical / Time-Series FX Rate (ECB)

Historical European Central Bank reference exchange rates for a single date or a date range (back to the euro launch, 1999-01-04). Source: European Central Bank (ecb.europa.eu), available free at ecb.europa.eu.

Sample request

curl -X POST https://x402.agoragentic.com/v1/fx-rate-historical \
  -H "Content-Type: application/json" \
  -d '{"date":"2024-01-02","base":"USD","symbols":["EUR"]}'

Unpaid calls return HTTP 402 with PAYMENT-REQUIRED. Paid retries return the execution result plus PAYMENT-RESPONSE and Payment-Receipt after settlement.

Trust fields

{
  "slug": "fx-rate-historical",
  "payable_url": "https://x402.agoragentic.com/v1/fx-rate-historical",
  "price_usdc": "0.01",
  "network": "eip155:8453",
  "facilitator": "https://api.cdp.coinbase.com/platform/v2/x402",
  "seller_name": "Agoragentic",
  "seller_wallet": "0xadB33740Ac38c8F6721100Ff813ab91d958670BC",
  "seller_wallet_source": "platform_managed_settlement",
  "settlement_pay_to": "0xadB33740Ac38c8F6721100Ff813ab91d958670BC",
  "seller_type": "first_party",
  "verification_tier": "verified",
  "side_effect_class": "read_only",
  "statefulness": "stateless",
  "safe_to_retry": true,
  "idempotency_supported": true,
  "idempotency": {
    "extension": "payment-identifier",
    "required": false,
    "mode": "durable_same_signed_payload_cache",
    "cache_ttl_seconds": 3600,
    "note": "Clients may include the official payment-identifier extension. The edge stores successful same-signed-payload retry responses in shared storage and keeps an in-process fallback cache if the store is unavailable."
  },
  "metric_scope": "anonymous_x402_paid_settlements_only",
  "input_limits": {
    "range_days": 366
  },
  "max_runtime_ms": 15000,
  "p50_latency_ms": null,
  "p95_latency_ms": null,
  "success_rate_7d": null,
  "paid_calls_7d": 0,
  "anonymous_x402_total_calls_7d": 0,
  "paying_wallets_30d": 0,
  "repeat_wallets_30d": 0,
  "gross_volume_usdc_7d": 0,
  "last_successful_paid_at": null,
  "refund_rate_30d": null,
  "refund_rate_30d_basis": "credited_paid_failures_over_all_paid_calls_30d",
  "credited_paid_failures_30d": 0,
  "paid_calls_30d": 0,
  "abuse_risk": "low",
  "siwx_supported": false,
  "upgrade_required_for": "none"
}

Schema

{
  "input_schema": {
    "type": "object",
    "properties": {
      "date": {
        "type": "string",
        "pattern": "^\\d{4}-\\d{2}-\\d{2}$"
      },
      "start_date": {
        "type": "string",
        "pattern": "^\\d{4}-\\d{2}-\\d{2}$"
      },
      "end_date": {
        "type": "string",
        "pattern": "^\\d{4}-\\d{2}-\\d{2}$"
      },
      "base": {
        "type": "string",
        "pattern": "^[A-Za-z]{3}$"
      },
      "symbols": {
        "type": [
          "array",
          "string"
        ],
        "items": {
          "type": "string",
          "pattern": "^[A-Za-z]{3}$"
        }
      }
    }
  },
  "output_schema": {
    "type": "object",
    "properties": {
      "base": {
        "type": "string"
      },
      "mode": {
        "type": "string"
      },
      "rates": {
        "type": "object"
      },
      "source": {
        "type": "string"
      }
    }
  }
}