FiatDock

Live 402 challenge

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

{
  "docs": "https://fiatdock.com/llms.txt",
  "hint": "This endpoint costs $0.0045 USDC per call via x402 on base or Solana (pay ONE entry of `accepts`). NOTHING was charged and nothing was created — a 402 is only the invoice, so retrying is always safe. To pay: sign the requirements in `accepts` (also base64-JSON in the PAYMENT-REQUIRED response header) and retry the SAME request with a PAYMENT-SIGNATURE header (the x402 v2 name; X-PAYMENT is accepted too). Easiest path: run `npx fiatdock-mcp` with AGENT_PRIVATE_KEY set to a Base wallet holding USDC — it signs and retries for you.",
  "error": "payment required",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0xeB12bB2f52EeD33DBa6A00774E48324032Fd87C6",
      "amount": "4500",
      "scheme": "exact",
      "network": "eip155:8453",
      "maxTimeoutSeconds": 300
    },
    {
      "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
      "extra": {
        "feePayer": "GVJJ7rdGiXr5xaYbRwRbjfaJL7fmwRygFi1H6aGqDveb"
      },
      "payTo": "J79PfB4V9mbNRD6XrWLGAPCQhB1htX4KW5gMYUgddtNV",
      "amount": "4500",
      "scheme": "exact",
      "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
      "maxTimeoutSeconds": 300
    }
  ],
  "howToPay": {
    "step1": "Pay ONE entry of `accepts` — they are alternatives for the same call (eip155:8453 or solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp). On an EVM chain: sign an EIP-3009 transferWithAuthorization for that entry; the EIP-712 domain is {name, version} from `extra`, chainId from `network`, verifyingContract = `asset`. On Solana: build x402's SVM `exact` payment — a partially-signed SPL TransferChecked transaction whose fee payer is `extra.feePayer`; any x402 SVM client does this (e.g. @x402/svm's ExactSvmScheme). It is valid only until its recent blockhash expires (about a minute), not for `maxTimeoutSeconds` — build it right before you send it.",
    "step2": "Fill in the envelope for the ONE entry you chose (that entry, verbatim, as `accepted`), then base64(JSON.stringify(envelope)). Never send more than one.",
    "step3": "Send it as the PAYMENT-SIGNATURE request header (X-PAYMENT is also accepted) and retry the SAME request.",
    "noWallet": "No signer? `npx fiatdock-mcp` with AGENT_PRIVATE_KEY set to a Base wallet holding USDC signs and retries automatically (it pays the Base entry).",
    "notCharged": "A 402 costs nothing — it is the price, not a bill. Retrying is always safe.",
    "payloadTemplate": {
      "scheme": "exact",
      "network": "eip155:8453",
      "payload": {
        "signature": "<0x + 130 hex: your EIP-712 signature>",
        "authorization": {
          "to": "0xeB12bB2f52EeD33DBa6A00774E48324032Fd87C6",
          "from": "<0x + your wallet address>",
          "nonce": "<0x + 64 hex: 32 random bytes, never reused>",
          "value": "4500",
          "validAfter": "0",
          "validBefore": "<unix seconds, e.g. now + 60>"
        }
      },
      "accepted": {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0xeB12bB2f52EeD33DBa6A00774E48324032Fd87C6",
        "amount": "4500",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      },
      "x402Version": 2
    }
  },
  "priceUsd": 0.0045,
  "freeAlternative": "GET https://fiatdock.com/v1/token/price?symbol=ETH (free) and GET https://fiatdock.com/v1/quote (free)"
}

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": "0xeB12bB2f52EeD33DBa6A00774E48324032Fd87C6",
    "amount": "4500",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 300
  },
  {
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "extra": {
      "feePayer": "GVJJ7rdGiXr5xaYbRwRbjfaJL7fmwRygFi1H6aGqDveb"
    },
    "payTo": "J79PfB4V9mbNRD6XrWLGAPCQhB1htX4KW5gMYUgddtNV",
    "amount": "4500",
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "maxTimeoutSeconds": 300
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "body": {
          "text": "Please summarise the attached report in three bullet points."
        },
        "type": "http",
        "method": "POST",
        "bodyType": "json"
      },
      "output": {
        "type": "json",
        "example": {
          "note": "no_known_pattern = none of the known shapes matched, which is NOT a guarantee the text is safe.",
          "chars": 61,
          "method": "pattern ruleset (the one that scans every FiatDock marketplace listing)",
          "verdict": "no_known_pattern",
          "findings": [],
          "checkedAt": "2026-10-05T00:00:00.000Z",
          "highCount": 0,
          "mediumCount": 0
        }
      }
    },
    "schema": {
      "type": "object",
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "required": [
        "input"
      ],
      "properties": {
        "input": {
          "type": "object",
          "required": [
            "type",
            "method",
            "bodyType",
            "body"
          ],
          "properties": {
            "body": {
              "required": [],
              "properties": {
                "text": {
                  "type": "string",
                  "example": "Please summarise the attached report in three bullet points.",
                  "maxLength": 8000,
                  "description": "The text to scan (up to 8,000 characters). Omit the whole body to scan the published example"
                }
              }
            },
            "type": {
              "type": "string",
              "const": "http"
            },
            "method": {
              "enum": [
                "POST"
              ],
              "type": "string"
            },
            "bodyType": {
              "enum": [
                "json",
                "form-data",
                "text"
              ],
              "type": "string"
            }
          },
          "additionalProperties": false
        },
        "output": {
          "type": "object",
          "required": [
            "type"
          ],
          "properties": {
            "type": {
              "type": "string"
            },
            "example": {
              "type": "object"
            }
          }
        }
      }
    }
  }
}

Provenance

Seen in the source catalog

2026-10-19 07:46Z

Last indexed by Roundhouse

2026-10-26 20:00Z

Last enriched (probe, favicon, geo)

2026-10-19 06:15Z

x402 version

2

Max timeout

300s

Liveness probe

HTTP 402