Saylor Innovations Agent Bazaar by Saylor Innovations
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mirrored listing x402 eip155:8453eip155:137eip155:42161eip155:480solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdpalgorand:wGHE2Pwdvd7S12BL5FaOP20EGYesN73ktiC1qzkkit8=stellar:pubnet

Bitcoin smart-fee curve for 1/3/6/12/24/144-block confirmation targets + trend classificat

Bitcoin smart-fee curve for 1/3/6/12/24/144-block confirmation targets + trend classification (rising/stable/falling/surging) from 2h moving average.

Do you run api.carbon-cashmere.de? This listing was mirrored from Coinbase's public Bazaar. Claim it in 30 seconds — no account required — and it becomes verified, permanently overriding the mirrored copy.

Claim this listing
20000 (raw units)
price
1
calls / 30d
1
unique payers
2026-09-09
updated

Provider

api.carbon-cashmere.de · discovered, not yet claimed by its owner

Payment (x402 accepts[])

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0xf8b2dD46542175AD46e14e6133340E652665F2Ee",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "20000",
    "maxTimeoutSeconds": 300
  },
  {
    "scheme": "exact",
    "network": "eip155:137",
    "payTo": "0xf8b2dD46542175AD46e14e6133340E652665F2Ee",
    "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
    "amount": "20000",
    "maxTimeoutSeconds": 300
  },
  {
    "scheme": "exact",
    "network": "eip155:42161",
    "payTo": "0xf8b2dD46542175AD46e14e6133340E652665F2Ee",
    "asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
    "amount": "20000",
    "maxTimeoutSeconds": 300
  },
  {
    "scheme": "exact",
    "network": "eip155:480",
    "payTo": "0xf8b2dD46542175AD46e14e6133340E652665F2Ee",
    "asset": "0x79A02482A880bCE3F13e09Da970dC34db4CD24d1",
    "amount": "20000",
    "maxTimeoutSeconds": 300
  },
  {
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "payTo": "GgS891nMiEETjBEFw1QQxVcAqsRV34mDYpxh24TrpCiD",
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "amount": "20000",
    "maxTimeoutSeconds": 300
  },
  {
    "scheme": "exact",
    "network": "algorand:wGHE2Pwdvd7S12BL5FaOP20EGYesN73ktiC1qzkkit8=",
    "payTo": "5GRGZVUNRF2S4BY2TNRBCUCKUOT3H6BP56ACPCZVGR3ISTTRRSSB2RGJGI",
    "asset": "31566704",
    "amount": "20000",
    "maxTimeoutSeconds": 300
  },
  {
    "scheme": "exact",
    "network": "stellar:pubnet",
    "payTo": "GDYFWCUFLG7MZAITOOVITYDNCLVJXWJ7OASYJAJPPOTONUQRNBCRO2VP",
    "asset": "USDC:GA5ZSEJYB37JRC5AVCIA5MOP4RHTM335X2KGX3IHOJAPP5RE34K4KZVN",
    "amount": "200000",
    "maxTimeoutSeconds": 300
  }
]

Output schema

{
  "bazaar": {
    "info": {
      "input": {
        "method": "GET",
        "type": "http"
      },
      "output": {
        "example": {},
        "type": "json"
      }
    },
    "schema": {
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "properties": {
        "input": {
          "additionalProperties": false,
          "properties": {
            "method": {
              "enum": [
                "GET",
                "HEAD",
                "DELETE"
              ],
              "type": "string"
            },
            "queryParams": {
              "properties": {},
              "type": "object"
            },
            "type": {
              "const": "http",
              "type": "string"
            }
          },
          "required": [
            "type",
            "method"
          ],
          "type": "object"
        },
        "output": {
          "properties": {
            "example": {
              "type": "object"
            },
            "type": {
              "type": "string"
            }
          },
          "required": [
            "type"
          ],
          "type": "object"
        }
      },
      "required": [
        "input"
      ],
      "type": "object"
    }
  },
  "eip2612GasSponsoring": {
    "info": {
      "description": "The facilitator accepts EIP-2612 gasless Permit to Permit2 canonical contract.",
      "version": "1"
    },
    "schema": {
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "properties": {
        "amount": {
          "description": "The amount to approve (uint256).",
          "pattern": "^[0-9]+$",
          "type": "string"
        },
        "asset": {
          "description": "The address of the ERC-20 token contract.",
          "pattern": "^0x[a-fA-F0-9]{40}$",
          "type": "string"
        },
        "deadline": {
          "description": "The timestamp at which the signature expires.",
          "pattern": "^[0-9]+$",
          "type": "string"
        },
        "from": {
          "description": "The address of the sender.",
          "pattern": "^0x[a-fA-F0-9]{40}$",
          "type": "string"
        },
        "nonce": {
          "description": "The current EIP-2612 nonce of the sender.",
          "pattern": "^[0-9]+$",
          "type": "string"
        },
        "signature": {
          "description": "The 65-byte concatenated signature (r, s, v) as a hex string.",
          "pattern": "^0x[a-fA-F0-9]+$",
          "type": "string"
        },
        "spender": {
          "description": "The address of the spender (Canonical Permit2).",
          "pattern": "^0x[a-fA-F0-9]{40}$",
          "type": "string"
        },
        "version": {
          "description": "Schema version identifier.",
          "pattern": "^[0-9]+(\\.[0-9]+)*$",
          "type": "string"
        }
      },
      "required": [
        "from",
        "asset",
        "spender",
        "amount",
        "nonce",
        "deadline",
        "signature",
        "version"
      ],
      "type": "object"
    }
  },
  "erc20ApprovalGasSponsoring": {
    "info": {
      "description": "The facilitator accepts a raw signed approval transaction and will sponsor the gas fees.",
      "version": "1"
    },
    "schema": {
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "properties": {
        "amount": {
          "description": "Approval amount (uint256).",
          "pattern": "^[0-9]+$",
          "type": "string"
        },
        "asset": {
          "description": "The ERC-20 token contract address to approve.",
          "pattern": "^0x[a-fA-F0-9]{40}$",
          "type": "string"
        },
        "from": {
          "description": "The address of the sender.",
          "pattern": "^0x[a-fA-F0-9]{40}$",
          "type": "string"
        },
        "signedTransaction": {
          "description": "RLP-encoded signed transaction calling ERC20.approve().",
          "pattern": "^0x[a-fA-F0-9]+$",
          "type": "string"
        },
        "spender": {
          "description": "The address of the spender (Canonical Permit2).",
          "pattern": "^0x[a-fA-F0-9]{40}$",
          "type": "string"
        },
        "version": {
          "description": "Schema version identifier.",
          "pattern": "^[0-9]+(\\.[0-9]+)*$",
          "type": "string"
        }
      },
      "required": [
        "from",
        "asset",
        "spender",
        "amount",
        "signedTransaction",
        "version"
      ],
      "type": "object"
    }
  },
  "offer-receipt": {
    "info": {
      "offers": [
        {
          "acceptIndex": 0,
          "format": "eip712",
          "payload": {
            "amount": "20000",
            "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
            "network": "eip155:8453",
            "payTo": "0xf8b2dD46542175AD46e14e6133340E652665F2Ee",
            "resourceUrl": "https://api.carbon-cashmere.de/v1/btc-derivatives/fee-curve",
            "scheme": "exact",
            "validUntil": 1788946234,
            "version": 1
          },
          "signature": "0xcb38015369f2609fc1b67f9b995c5f2ea22a76ae04f0cb0eefcbfefb2964d8cc272042830891e705d3b4c003f9914748a9b564ff8884da58729d4984146bf6d21c"
        },
        {
          "acceptIndex": 1,
          "format": "eip712",
          "payload": {
            "amount": "20000",
            "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
            "network": "eip155:137",
            "payTo": "0xf8b2dD46542175AD46e14e6133340E652665F2Ee",
            "resourceUrl": "https://api.carbon-cashmere.de/v1/btc-derivatives/fee-curve",
            "scheme": "exact",
            "validUntil": 1788946234,
            "version": 1
          },
          "signature": "0xdf034e9930c7be404f7ca7f11b549e44f9adeecf3664bf48d9e12c20344d77680b41492a0ac59280fd72fbdf8aaaeac7a37693f120a5fca8bafc6a6de6a9a9921b"
        },
        {
          "acceptIndex": 2,
          "format": "eip712",
          "payload": {
            "amount": "20000",
            "asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
            "network": "eip155:42161",
            "payTo": "0xf8b2dD46542175AD46e14e6133340E652665F2Ee",
            "resourceUrl": "https://api.carbon-cashmere.de/v1/btc-derivatives/fee-curve",
            "scheme": "exact",
            "validUntil": 1788946234,
            "version": 1
          },
          "signature": "0x2bc358df9c56f76f38dfb8a5cf97f604a90b701973763c807237f4764ae63f4775e2aacda06f0587e6dd7bd42469921f299fc80ec84bf147b4051806950692801b"
        },
        {
          "acceptIndex": 3,
          "format": "eip712",
          "payload": {
            "amount": "20000",
            "asset": "0x79A02482A880bCE3F13e09Da970dC34db4CD24d1",
            "network": "eip155:480",
            "payTo": "0xf8b2dD46542175AD46e14e6133340E652665F2Ee",
            "resourceUrl": "https://api.carbon-cashmere.de/v1/btc-derivatives/fee-curve",
            "scheme": "exact",
            "validUntil": 1788946234,
            "version": 1
          },
          "signature": "0x96a175e29082ed9b3341c3ac563cb5769d7efe76e233d041f4ea782360859bd35e088fcecbca7e9a486137513d8748f15d0023ac1598ccdb33e02765e4c805001c"
        },
        {
          "acceptIndex": 4,
          "format": "eip712",
          "payload": {
            "amount": "20000",
            "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
            "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
            "payTo": "GgS891nMiEETjBEFw1QQxVcAqsRV34mDYpxh24TrpCiD",
            "resourceUrl": "https://api.carbon-cashmere.de/v1/btc-derivatives/fee-curve",
            "scheme": "exact",
            "validUntil": 1788946234,
            "version": 1
          },
          "signature": "0xa2364680135d23a3f144304af2da8dc5da1ce13d785343178bf87e68d0311cfd2ac9982ef59bf30c21fa19ab371411a7ddfa4e46faa202c54702751d30f983121b"
        },
        {
          "acceptIndex": 5,
          "format": "eip712",
          "payload": {
            "amount": "20000",
            "asset": "31566704",
            "network": "algorand:wGHE2Pwdvd7S12BL5FaOP20EGYesN73ktiC1qzkkit8=",
            "payTo": "5GRGZVUNRF2S4BY2TNRBCUCKUOT3H6BP56ACPCZVGR3ISTTRRSSB2RGJGI",
            "resourceUrl": "https://api.carbon-cashmere.de/v1/btc-derivatives/fee-curve",
            "scheme": "exact",
            "validUntil": 1788946234,
            "version": 1
          },
          "signature": "0x341019731754e45b4184564f616a10823209c76847ce6f67130cdd9c316458a02191b003747e381b07f9b030f9bea9013354be12fbb3716a7400977b9395ce1d1c"
        },
        {
          "acceptIndex": 6,
          "format": "eip712",
          "payload": {
            "amount": "200000",
            "asset": "USDC:GA5ZSEJYB37JRC5AVCIA5MOP4RHTM335X2KGX3IHOJAPP5RE34K4KZVN",
            "network": "stellar:pubnet",
            "payTo": "GDYFWCUFLG7MZAITOOVITYDNCLVJXWJ7OASYJAJPPOTONUQRNBCRO2VP",
            "resourceUrl": "https://api.carbon-cashmere.de/v1/btc-derivatives/fee-curve",
            "scheme": "exact",
            "validUntil": 1788946234,
            "version": 1
          },
          "signature": "0x068fd63ed857f27aed927bbf963f0ea200e57589e912c7bae0295f099ca75e7359a15ebf97956d974560ff4ee742b9eb4d6469b1dc5b8a1cddeb819bd08a61661b"
        }
      ]
    },
    "schema": {
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "properties": {
        "format": {
          "enum": [
            "eip712",
            "jws"
          ],
          "type": "string"
        },
        "payload": {
          "type": "object"
        },
        "signature": {
          "type": "string"
        }
      },
      "required": [
        "format",
        "payload",
        "signature"
      ],
      "type": "object"
    }
  },
  "payment-identifier": {
    "info": {
      "required": false
    },
    "schema": {
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "properties": {
        "id": {
          "maxLength": 128,
          "minLength": 16,
          "pattern": "^[a-zA-Z0-9_-]+$",
          "type": "string"
        },
        "required": {
          "type": "boolean"
        }
      },
      "required": [
        "required"
      ],
      "type": "object"
    }
  }
}

Use it

curl

curl "https://api.carbon-cashmere.de/v1/btc-derivatives/fee-curve"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

JavaScript

const res = await fetch("https://api.carbon-cashmere.de/v1/btc-derivatives/fee-curve");
if (res.status === 402) {
  const { accepts } = await res.json();
  // pay one of accepts[] via an x402 client, then retry with the payment header
}

Python

import httpx
res = httpx.get("https://api.carbon-cashmere.de/v1/btc-derivatives/fee-curve")
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header

Machine-readable

Everything on this page is also available as clean JSON at /resources/12573.json, and this resource appears in /discovery/resources and /discovery/search.