{
  "x402Version": 2,
  "id": 12570,
  "slug": "12570",
  "resource": "https://api.carbon-cashmere.de/v1/kaspa-derivatives/dag-state",
  "description": "Kaspa BlockDAG topology snapshot: tips, sink, virtual chain, pruning point, blue scores. For DAG-state monitoring, side-branch detection, sync verification.",
  "type": "http",
  "accepts": [
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      "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",
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    },
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      "scheme": "exact",
      "network": "eip155:480",
      "payTo": "0xf8b2dD46542175AD46e14e6133340E652665F2Ee",
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      "scheme": "exact",
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      "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
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    },
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      "scheme": "exact",
      "network": "algorand:wGHE2Pwdvd7S12BL5FaOP20EGYesN73ktiC1qzkkit8=",
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      "maxTimeoutSeconds": 300
    },
    {
      "scheme": "exact",
      "network": "stellar:pubnet",
      "payTo": "GDYFWCUFLG7MZAITOOVITYDNCLVJXWJ7OASYJAJPPOTONUQRNBCRO2VP",
      "asset": "USDC:GA5ZSEJYB37JRC5AVCIA5MOP4RHTM335X2KGX3IHOJAPP5RE34K4KZVN",
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      "maxTimeoutSeconds": 300
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  ],
  "outputSchema": {
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      "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": {
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            "description": "The amount to approve (uint256).",
            "pattern": "^[0-9]+$",
            "type": "string"
          },
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            "pattern": "^0x[a-fA-F0-9]{40}$",
            "type": "string"
          },
          "deadline": {
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            "pattern": "^[0-9]+$",
            "type": "string"
          },
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            "pattern": "^0x[a-fA-F0-9]{40}$",
            "type": "string"
          },
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            "type": "string"
          },
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            "description": "The 65-byte concatenated signature (r, s, v) as a hex string.",
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            "type": "string"
          },
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            "description": "The address of the spender (Canonical Permit2).",
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            "type": "string"
          },
          "version": {
            "description": "Schema version identifier.",
            "pattern": "^[0-9]+(\\.[0-9]+)*$",
            "type": "string"
          }
        },
        "required": [
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          "spender",
          "amount",
          "nonce",
          "deadline",
          "signature",
          "version"
        ],
        "type": "object"
      }
    },
    "erc20ApprovalGasSponsoring": {
      "info": {
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        "version": "1"
      },
      "schema": {
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "properties": {
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            "description": "Approval amount (uint256).",
            "pattern": "^[0-9]+$",
            "type": "string"
          },
          "asset": {
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            "pattern": "^0x[a-fA-F0-9]{40}$",
            "type": "string"
          },
          "from": {
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            "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",
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              "scheme": "exact",
              "validUntil": 1789032629,
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            "acceptIndex": 1,
            "format": "eip712",
            "payload": {
              "amount": "20000",
              "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
              "network": "eip155:137",
              "payTo": "0xf8b2dD46542175AD46e14e6133340E652665F2Ee",
              "resourceUrl": "https://api.carbon-cashmere.de/v1/kaspa-derivatives/dag-state",
              "scheme": "exact",
              "validUntil": 1789032629,
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          {
            "acceptIndex": 2,
            "format": "eip712",
            "payload": {
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              "asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
              "network": "eip155:42161",
              "payTo": "0xf8b2dD46542175AD46e14e6133340E652665F2Ee",
              "resourceUrl": "https://api.carbon-cashmere.de/v1/kaspa-derivatives/dag-state",
              "scheme": "exact",
              "validUntil": 1789032629,
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          {
            "acceptIndex": 3,
            "format": "eip712",
            "payload": {
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              "asset": "0x79A02482A880bCE3F13e09Da970dC34db4CD24d1",
              "network": "eip155:480",
              "payTo": "0xf8b2dD46542175AD46e14e6133340E652665F2Ee",
              "resourceUrl": "https://api.carbon-cashmere.de/v1/kaspa-derivatives/dag-state",
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            "format": "eip712",
            "payload": {
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              "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
              "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
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          {
            "acceptIndex": 5,
            "format": "eip712",
            "payload": {
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              "asset": "31566704",
              "network": "algorand:wGHE2Pwdvd7S12BL5FaOP20EGYesN73ktiC1qzkkit8=",
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          {
            "acceptIndex": 6,
            "format": "eip712",
            "payload": {
              "amount": "200000",
              "asset": "USDC:GA5ZSEJYB37JRC5AVCIA5MOP4RHTM335X2KGX3IHOJAPP5RE34K4KZVN",
              "network": "stellar:pubnet",
              "payTo": "GDYFWCUFLG7MZAITOOVITYDNCLVJXWJ7OASYJAJPPOTONUQRNBCRO2VP",
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        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "properties": {
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            "enum": [
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              "jws"
            ],
            "type": "string"
          },
          "payload": {
            "type": "object"
          },
          "signature": {
            "type": "string"
          }
        },
        "required": [
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          "signature"
        ],
        "type": "object"
      }
    },
    "payment-identifier": {
      "info": {
        "required": false
      },
      "schema": {
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "properties": {
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            "minLength": 16,
            "pattern": "^[a-zA-Z0-9_-]+$",
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          "required": {
            "type": "boolean"
          }
        },
        "required": [
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        ],
        "type": "object"
      }
    }
  },
  "tags": [
    "bazaar",
    "eip2612GasSponsoring",
    "erc20ApprovalGasSponsoring",
    "offer-receipt",
    "payment-identifier"
  ],
  "sourceHost": "api.carbon-cashmere.de",
  "lastUpdated": "2026-09-10T08:30:29.711Z",
  "quality": {
    "calls30d": 1,
    "uniquePayers30d": 1,
    "lastCalledAt": "2026-09-10T08:30:29.224Z"
  },
  "liveness": {},
  "verified": false,
  "featured": false,
  "provider": {
    "host": "api.carbon-cashmere.de",
    "manifest_name": "api.carbon-cashmere.de",
    "source": "cdp-mirror",
    "source_manifest_url": "https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources",
    "submitted_at": "2026-09-18T22:00:31.484Z"
  }
}