apiwitchcraft.duckdns.org

Get live and historical foreign-exchange rates for 150+ currency pairs including spot, mid, and cross rates in a single x402 call. Convert exact amounts for cross-border settlement, treasury, and dynamic pricing in AI-agent and payment workflows. Mirrors institutional mid-market data with timestamped rates. Pay per quote in USDC on Base, no API key, instant JSON.

Searchofflineeip155:8453Exactvia cdp

https://apiwitchcraft.duckdns.org/fx

FxForexMarket-data

Settlements · 30d

1

No per-endpoint history for this service yet, so this is payments indexed to its PROVIDER's wallet over 30 days.

$0.18

Verified settled volume

88 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.

4

Calls · 30d

Upstream's own call count for this endpoint, not ours.

1

Unique payers · 30d

Last called 2026-07-22 19:53Z

—

Upstream on-chain volume

Reported by the source catalog.

Paid to

0x604e856C94D6dD6088Ce3F9752B2538F70383f03

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.

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 0x604e…83f03. The signed payment is good for 5 minutes.

Paid to: 0x604e…83f03
USD Coin contract: 0x8335…02913
Payment window: 5 minutes
As published: 2000 smallest units

2000units

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: 0x604e…83f03
Token contract: 0x3c49…c3359
Payment window: 5 minutes

2000units

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: 0x604e…83f03
Token contract: 0xaf88…e5831
Payment window: 5 minutes

2000units

on Optimism · 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: 0x604e…83f03
Token contract: 0x0b2C…7Ff85
Payment window: 5 minutes

2000units

on eip155:43114 · 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: 0x604e…83f03
Token contract: 0xB97E…48a6E
Payment window: 5 minutes

2000units

on eip155:56 · 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: 0x604e…83f03
Token contract: 0x8AC7…bA77E
Payment window: 5 minutes

2000units

on solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp · 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: 2DgEL9…tator
Token contract: EPjFWd…TDt1v
Payment window: 5 minutes

2000units

on solana:EtWTRABZaYq6iMfeYKouRu166VU2xqa1 · 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: 2DgEL9…tator
Token contract: 4zMMC9…DncDU
Payment window: 5 minutes

The catalog’s raw entry

[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0x604e856C94D6dD6088Ce3F9752B2538F70383f03",
    "amount": "2000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 300
  },
  {
    "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0x604e856C94D6dD6088Ce3F9752B2538F70383f03",
    "amount": "2000",
    "scheme": "exact",
    "network": "eip155:137",
    "maxTimeoutSeconds": 300
  },
  {
    "asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0x604e856C94D6dD6088Ce3F9752B2538F70383f03",
    "amount": "2000",
    "scheme": "exact",
    "network": "eip155:42161",
    "maxTimeoutSeconds": 300
  },
  {
    "asset": "0x0b2C639c533813f4Aa9D7837CAf62653d097Ff85",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0x604e856C94D6dD6088Ce3F9752B2538F70383f03",
    "amount": "2000",
    "scheme": "exact",
    "network": "eip155:10",
    "maxTimeoutSeconds": 300
  },
  {
    "asset": "0xB97EF9Ef8734C71904D8002F8b6Bc66Dd9c48a6E",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0x604e856C94D6dD6088Ce3F9752B2538F70383f03",
    "amount": "2000",
    "scheme": "exact",
    "network": "eip155:43114",
    "maxTimeoutSeconds": 300
  },
  {
    "asset": "0x8AC76a51cc950d9822D68b83fE43AD4843bA77E",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0x604e856C94D6dD6088Ce3F9752B2538F70383f03",
    "amount": "2000",
    "scheme": "exact",
    "network": "eip155:56",
    "maxTimeoutSeconds": 300
  },
  {
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "extra": {
      "feePayer": "BFK9TLC3edb13K6v4YyH3DwPb5DSUpkWvb7XnqCL9b4F"
    },
    "payTo": "2DgEL95L8DtaRb4ubYqrrnMbX7Zxgjxq7k8Ed9XAWYcpFACILITATOR_URL=https://x402.org/facilitator",
    "amount": "2000",
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "maxTimeoutSeconds": 300
  },
  {
    "asset": "4zMMC9srt5Ri5X14GAgXhaHii3GnPAEERYPJgZJDncDU",
    "extra": {
      "feePayer": "BFK9TLC3edb13K6v4YyH3DwPb5DSUpkWvb7XnqCL9b4F"
    },
    "payTo": "2DgEL95L8DtaRb4ubYqrrnMbX7Zxgjxq7k8Ed9XAWYcpFACILITATOR_URL=https://x402.org/facilitator",
    "amount": "2000",
    "scheme": "exact",
    "network": "solana:EtWTRABZaYq6iMfeYKouRu166VU2xqa1",
    "maxTimeoutSeconds": 300
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "type": "http",
        "method": "GET",
        "queryParams": {
          "to": "EUR",
          "from": "USD"
        }
      },
      "output": {
        "type": "json",
        "example": {
          "to": "EUR",
          "from": "USD",
          "rate": 0.91
        }
      }
    },
    "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": [
                "from",
                "to"
              ],
              "properties": {
                "to": {
                  "type": "string"
                },
                "from": {
                  "type": "string"
                }
              }
            }
          },
          "additionalProperties": false
        },
        "output": {
          "type": "object",
          "required": [
            "type"
          ],
          "properties": {
            "type": {
              "type": "string"
            },
            "example": {
              "type": "object"
            }
          }
        }
      }
    }
  }
}

Provenance

Seen in the source catalog: 2026-07-22 19:53Z
Last indexed by Roundhouse: 2026-08-04 03:20Z
Last enriched (probe, favicon, geo): 2026-09-02 01:16Z
x402 version: 2
Max timeout: 300s
Liveness probe: HTTP 0

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

No per-endpoint history for this service yet, so this is payments indexed to its PROVIDER's wallet over 30 days. Verified volume counts only settlements with an on-chain EIP-3009 marker.

Show the prompt

Using Roundhouse, look up the x402 service apiwitchcraft.duckdns.org 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=apiwitchcraft.duckdns.org'
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://apiwitchcraft.duckdns.org/fx, 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://app.roundhouseai.io/dashboard/team.

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