Factline

Live 402 challenge

Captured by the enrichment pass, not read just now. Prices can change — always read the 402 the endpoint answers with.

{
  "docs": "/llms.txt",
  "error": "payment_required",
  "message": "This costs 0.001 USDC via x402 (Base or Solana). You are charged only when the answer is a success (2xx). Payment details are in the PAYMENT-REQUIRED header. Free alternative: /v1/eu/fx (same data, rate-limited, for people and light use).",
  "preview": "https://factline.dev/v1/fx/rate/preview",
  "no_wallet": "No x402 wallet? Get a free trial API key (2,000 credits a month): POST https://factline.dev/v1/key/trial with {\"email\": \"<your work email>\"}, then send it as x-api-key.",
  "price_usdc": "0.001",
  "preview_hint": "Free: call the preview with the same query parameters to check your input and see what the paid answer contains before paying.",
  "free_endpoint": "/v1/eu/fx (same data, rate-limited, for people and light use)"
}

Accepts

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

[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0xb58dd178abac67f6d4894437a7fc725cbddb2075",
    "amount": "1000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 120
  },
  {
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "extra": {
      "feePayer": "GVJJ7rdGiXr5xaYbRwRbjfaJL7fmwRygFi1H6aGqDveb"
    },
    "payTo": "fyqifu7otDYanhqr84B9YzZfA5LwRTJ1uFLqDJinMTK",
    "amount": "1000",
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "maxTimeoutSeconds": 120
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "type": "http",
        "method": "GET",
        "queryParams": {
          "base": "USD",
          "amount": "100",
          "symbols": "EUR,GBP,JPY"
        }
      },
      "output": {
        "type": "json",
        "example": {
          "base": "USD",
          "date": "2026-10-14",
          "rates": {
            "EUR": 85.616,
            "GBP": 74.302,
            "JPY": 15140.5
          },
          "amount": 100,
          "source": "European Central Bank, euro foreign exchange reference rates",
          "explain": "Euro foreign exchange reference rates published by the ECB around 16:00 CET on TARGET working days; cross rates are computed from the euro rates. For information, not for transactions.",
          "summary": "100 USD = 85.616 EUR, 74.302 GBP, 15140.5 JPY (ECB reference rates of 2026-10-14)."
        }
      }
    },
    "schema": {
      "type": "object",
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "required": [
        "input"
      ],
      "properties": {
        "input": {
          "type": "object",
          "required": [
            "type",
            "method"
          ],
          "properties": {
            "type": {
              "type": "string",
              "const": "http"
            },
            "method": {
              "enum": [
                "GET"
              ],
              "type": "string"
            },
            "queryParams": {
              "type": "object",
              "properties": {
                "base": {
                  "type": "string",
                  "description": "3-letter currency code to convert from, default EUR (e.g. USD)"
                },
                "date": {
                  "type": "string",
                  "description": "Optional date YYYY-MM-DD in the last 90 days, e.g. an invoice date"
                },
                "amount": {
                  "type": "string",
                  "description": "Amount in the base currency, default 1"
                },
                "symbols": {
                  "type": "string",
                  "description": "Currencies to convert to, comma separated (e.g. EUR,GBP,JPY); empty = all ~30"
                }
              }
            }
          },
          "additionalProperties": false
        },
        "output": {
          "type": "object",
          "required": [
            "type"
          ],
          "properties": {
            "type": {
              "type": "string"
            },
            "example": {
              "type": "object"
            }
          }
        }
      }
    }
  },
  "payment-identifier": {
    "info": {
      "required": false
    },
    "schema": {
      "type": "object",
      "$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

2026-10-25 21:57Z

Last indexed by Roundhouse

2026-10-26 22:40Z

Last enriched (probe, favicon, geo)

2026-10-15 07:15Z

x402 version

2

Max timeout

120s

Liveness probe

HTTP 402