api.carbon-cashmere.de

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SearchLiveeip155:8453Exactvia cdp

https://api.carbon-cashmere.de/v1/kaspa-derivatives/throughput-health

Settlements · 30d

33↓ 86%

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

$4.42

Verified settled volume

143 settlements proven x402 by their on-chain EIP-3009 marker.

$0.100

Listed price

As published in the catalog. Always read the live 402 before paying.

2

Calls · 30d

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

1

Unique payers · 30d

Last called 2026-07-15 08:31Z

—

Upstream on-chain volume

Reported by the source catalog.

Paid to

0xf8b2dD46542175AD46e14e6133340E652665F2Ee

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.

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://api.carbon-cashmere.de/docs",
  "hint": "Block count, DAA score, hashrate TH/s, tips, peers for $0.02",
  "moat": "own_kaspa_node",
  "error": "Payment Required",
  "teaser": "Proprietary Kaspa DAG metrics direct from our Rusty-Kaspa full node (v1.1.0)",
  "message": "This endpoint requires x402 USDC micropayment, MPP Payment (Tempo), or an API key. Prices start at $0.005 per call.",
  "agentkit": "World ID verified agents get 3 free calls per endpoint. Send X-AgentKit-Proof header with SIWE proof.",
  "discovery": "https://api.carbon-cashmere.de/v1/endpoints",
  "get_api_key": "https://api.carbon-cashmere.de/stripe/checkout?product=signal_api",
  "api_key_price": "$9.99/month",
  "free_endpoints": [
    {
      "path": "/v1/prices",
      "description": "Real-time prices for top 10 coins — no payment required"
    },
    {
      "path": "/v1/track-record",
      "description": "Aggregate signal track-record — no payment required"
    }
  ]
}

Accepts

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

0.1USDC≈ $0.1 USD

on Base · exact scheme

Pay 0.1 USDC on Base to 0xf8b2…5F2Ee. The signed payment is good for 5 minutes.

Paid to: 0xf8b2…5F2Ee
USD Coin contract: 0x8335…02913
Payment window: 5 minutes
As published: 100000 smallest units

100000units

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: 0xf8b2…5F2Ee
Token contract: 0x3c49…c3359
Payment window: 5 minutes

100000units

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: 0xf8b2…5F2Ee
Token contract: 0xaf88…e5831
Payment window: 5 minutes

100000units

on eip155:480 · 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: 0xf8b2…5F2Ee
Token contract: 0x79A0…D24d1
Payment window: 5 minutes

100000units

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: GgS891…rpCiD
Token contract: EPjFWd…TDt1v
Payment window: 5 minutes

100000units

on algorand:wGHE2Pwdvd7S12BL5FaOP20EGYesN73ktiC1qzkkit8= · 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: 5GRGZV…RGJGI
Token contract: 31566704
Payment window: 5 minutes

1000000units

on stellar:pubnet · 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: GDYFWC…RO2VP
Token contract: USDC:G…4KZVN
Payment window: 5 minutes

The catalog’s raw entry

[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0xf8b2dD46542175AD46e14e6133340E652665F2Ee",
    "amount": "100000",
    "scheme": "exact",
    "network": "eip155:8453",
    "resource": "https://api.carbon-cashmere.de/v1/kaspa-derivatives/throughput-health",
    "maxTimeoutSeconds": 300
  },
  {
    "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0xf8b2dD46542175AD46e14e6133340E652665F2Ee",
    "amount": "100000",
    "scheme": "exact",
    "network": "eip155:137",
    "resource": "https://api.carbon-cashmere.de/v1/kaspa-derivatives/throughput-health",
    "maxTimeoutSeconds": 300
  },
  {
    "asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0xf8b2dD46542175AD46e14e6133340E652665F2Ee",
    "amount": "100000",
    "scheme": "exact",
    "network": "eip155:42161",
    "resource": "https://api.carbon-cashmere.de/v1/kaspa-derivatives/throughput-health",
    "maxTimeoutSeconds": 300
  },
  {
    "asset": "0x79A02482A880bCE3F13e09Da970dC34db4CD24d1",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0xf8b2dD46542175AD46e14e6133340E652665F2Ee",
    "amount": "100000",
    "scheme": "exact",
    "network": "eip155:480",
    "resource": "https://api.carbon-cashmere.de/v1/kaspa-derivatives/throughput-health",
    "maxTimeoutSeconds": 300
  },
  {
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "extra": {
      "feePayer": "BENrLoUbndxoNMUS5JXApGMtNykLjFXXixMtpDwDR9SP"
    },
    "payTo": "GgS891nMiEETjBEFw1QQxVcAqsRV34mDYpxh24TrpCiD",
    "amount": "100000",
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "resource": "https://api.carbon-cashmere.de/v1/kaspa-derivatives/throughput-health",
    "maxTimeoutSeconds": 300
  },
  {
    "asset": "31566704",
    "extra": {
      "decimals": 6,
      "feePayer": "ZMFK2OI7ZBD2U27ISERZC4S6LKM6WMFJPZQ4MYNJDZ2VNBNMBA67RA22AA",
      "genesisId": "mainnet-v1.0",
      "genesisHash": "wGHE2Pwdvd7S12BL5FaOP20EGYesN73ktiC1qzkkit8="
    },
    "payTo": "5GRGZVUNRF2S4BY2TNRBCUCKUOT3H6BP56ACPCZVGR3ISTTRRSSB2RGJGI",
    "amount": "100000",
    "scheme": "exact",
    "network": "algorand:wGHE2Pwdvd7S12BL5FaOP20EGYesN73ktiC1qzkkit8=",
    "resource": "https://api.carbon-cashmere.de/v1/kaspa-derivatives/throughput-health",
    "maxTimeoutSeconds": 300
  },
  {
    "asset": "USDC:GA5ZSEJYB37JRC5AVCIA5MOP4RHTM335X2KGX3IHOJAPP5RE34K4KZVN",
    "extra": {
      "decimals": 7,
      "areFeesSponsored": true
    },
    "payTo": "GDYFWCUFLG7MZAITOOVITYDNCLVJXWJ7OASYJAJPPOTONUQRNBCRO2VP",
    "amount": "1000000",
    "scheme": "exact",
    "network": "stellar:pubnet",
    "resource": "https://api.carbon-cashmere.de/v1/kaspa-derivatives/throughput-health",
    "maxTimeoutSeconds": 300
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "type": "http",
        "method": "GET"
      },
      "output": {
        "type": "json",
        "example": {}
      }
    },
    "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",
                "HEAD",
                "DELETE"
              ],
              "type": "string"
            },
            "queryParams": {
              "type": "object",
              "properties": {}
            }
          },
          "additionalProperties": false
        },
        "output": {
          "type": "object",
          "required": [
            "type"
          ],
          "properties": {
            "type": {
              "type": "string"
            },
            "example": {
              "type": "object",
              "properties": {
                "hourly": {
                  "type": "array"
                },
                "current": {
                  "type": "object"
                },
                "baseline_30d_to_7d": {
                  "type": "object"
                }
              }
            }
          }
        }
      }
    }
  },
  "offer-receipt": {
    "info": {
      "offers": [
        {
          "format": "eip712",
          "payload": {
            "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
            "payTo": "0xf8b2dD46542175AD46e14e6133340E652665F2Ee",
            "amount": "100000",
            "scheme": "exact",
            "network": "eip155:8453",
            "version": 1,
            "validUntil": 1784107894,
            "resourceUrl": "https://api.carbon-cashmere.de/v1/kaspa-derivatives/throughput-health"
          },
          "signature": "0x2d086ea0b0eadaa989b609b5b798beae8a3f03a7ad3688d73a404c7d9012b4e55120ed970fe39084eca57863fabbd7e744fa1c73b4b405f9dc7ae5349f6b64221b",
          "acceptIndex": 0
        },
        {
          "format": "eip712",
          "payload": {
            "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
            "payTo": "0xf8b2dD46542175AD46e14e6133340E652665F2Ee",
            "amount": "100000",
            "scheme": "exact",
            "network": "eip155:137",
            "version": 1,
            "validUntil": 1784107894,
            "resourceUrl": "https://api.carbon-cashmere.de/v1/kaspa-derivatives/throughput-health"
          },
          "signature": "0x487928dd3337416def9918dd0c7f03992046b8db2571571c6d0f7a98bdf8f3f97bb5e9d89f06d7568e399fa24a3346055a92f67424d6e616794cc13a3d5564d51b",
          "acceptIndex": 1
        },
        {
          "format": "eip712",
          "payload": {
            "asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
            "payTo": "0xf8b2dD46542175AD46e14e6133340E652665F2Ee",
            "amount": "100000",
            "scheme": "exact",
            "network": "eip155:42161",
            "version": 1,
            "validUntil": 1784107894,
            "resourceUrl": "https://api.carbon-cashmere.de/v1/kaspa-derivatives/throughput-health"
          },
          "signature": "0xe010eef2d05e3f8b071de7a471edf8d0ea2796ba3760d648aaac27f73f74b8b81aea596204746af9832a757fc5f201898114344fb550544d8885d2bd9b5c2e5b1c",
          "acceptIndex": 2
        },
        {
          "format": "eip712",
          "payload": {
            "asset": "0x79A02482A880bCE3F13e09Da970dC34db4CD24d1",
            "payTo": "0xf8b2dD46542175AD46e14e6133340E652665F2Ee",
            "amount": "100000",
            "scheme": "exact",
            "network": "eip155:480",
            "version": 1,
            "validUntil": 1784107894,
            "resourceUrl": "https://api.carbon-cashmere.de/v1/kaspa-derivatives/throughput-health"
          },
          "signature": "0x8d237abd9d851c0e3bd2976fca41af45dd4660097d222456a37aa7cc888023b62f789ec76261249d22263572960cf637e44efa225d1cc14e01468c72d58da8291b",
          "acceptIndex": 3
        },
        {
          "format": "eip712",
          "payload": {
            "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
            "payTo": "GgS891nMiEETjBEFw1QQxVcAqsRV34mDYpxh24TrpCiD",
            "amount": "100000",
            "scheme": "exact",
            "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
            "version": 1,
            "validUntil": 1784107894,
            "resourceUrl": "https://api.carbon-cashmere.de/v1/kaspa-derivatives/throughput-health"
          },
          "signature": "0x665ed397ef469e2df14a84ea3b20ce10c8f30bad83ac03725652d8a8137255940e1396a419430f91bd3a6abcff31710bf93c154789b09a0021c62a902df3947d1b",
          "acceptIndex": 4
        },
        {
          "format": "eip712",
          "payload": {
            "asset": "31566704",
            "payTo": "5GRGZVUNRF2S4BY2TNRBCUCKUOT3H6BP56ACPCZVGR3ISTTRRSSB2RGJGI",
            "amount": "100000",
            "scheme": "exact",
            "network": "algorand:wGHE2Pwdvd7S12BL5FaOP20EGYesN73ktiC1qzkkit8=",
            "version": 1,
            "validUntil": 1784107894,
            "resourceUrl": "https://api.carbon-cashmere.de/v1/kaspa-derivatives/throughput-health"
          },
          "signature": "0xceafc12872dc99f14a40824e377650edbe6864521ced4f562e5eb9897e25f56529d54048ad96d3edded840d09c750f5ec3d2a0f1c06d87d8f834ff98f71411881b",
          "acceptIndex": 5
        },
        {
          "format": "eip712",
          "payload": {
            "asset": "USDC:GA5ZSEJYB37JRC5AVCIA5MOP4RHTM335X2KGX3IHOJAPP5RE34K4KZVN",
            "payTo": "GDYFWCUFLG7MZAITOOVITYDNCLVJXWJ7OASYJAJPPOTONUQRNBCRO2VP",
            "amount": "1000000",
            "scheme": "exact",
            "network": "stellar:pubnet",
            "version": 1,
            "validUntil": 1784107894,
            "resourceUrl": "https://api.carbon-cashmere.de/v1/kaspa-derivatives/throughput-health"
          },
          "signature": "0x34f3140e1655d90bbb6e9daa398a6f0a052ac50f9089f4cf30ef8a94919774852baf279a61a92c75f23f306a9ebc3d776311393905bd0ebdf0a05799cae15dce1c",
          "acceptIndex": 6
        }
      ]
    },
    "schema": {
      "type": "object",
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "required": [
        "format",
        "payload",
        "signature"
      ],
      "properties": {
        "format": {
          "enum": [
            "eip712",
            "jws"
          ],
          "type": "string"
        },
        "payload": {
          "type": "object"
        },
        "signature": {
          "type": "string"
        }
      }
    }
  },
  "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"
        }
      }
    }
  },
  "eip2612GasSponsoring": {
    "info": {
      "version": "1",
      "description": "The facilitator accepts EIP-2612 gasless Permit to Permit2 canonical contract."
    },
    "schema": {
      "type": "object",
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "required": [
        "from",
        "asset",
        "spender",
        "amount",
        "nonce",
        "deadline",
        "signature",
        "version"
      ],
      "properties": {
        "from": {
          "type": "string",
          "pattern": "^0x[a-fA-F0-9]{40}$",
          "description": "The address of the sender."
        },
        "asset": {
          "type": "string",
          "pattern": "^0x[a-fA-F0-9]{40}$",
          "description": "The address of the ERC-20 token contract."
        },
        "nonce": {
          "type": "string",
          "pattern": "^[0-9]+$",
          "description": "The current EIP-2612 nonce of the sender."
        },
        "amount": {
          "type": "string",
          "pattern": "^[0-9]+$",
          "description": "The amount to approve (uint256)."
        },
        "spender": {
          "type": "string",
          "pattern": "^0x[a-fA-F0-9]{40}$",
          "description": "The address of the spender (Canonical Permit2)."
        },
        "version": {
          "type": "string",
          "pattern": "^[0-9]+(\\.[0-9]+)*$",
          "description": "Schema version identifier."
        },
        "deadline": {
          "type": "string",
          "pattern": "^[0-9]+$",
          "description": "The timestamp at which the signature expires."
        },
        "signature": {
          "type": "string",
          "pattern": "^0x[a-fA-F0-9]+$",
          "description": "The 65-byte concatenated signature (r, s, v) as a hex string."
        }
      }
    }
  },
  "erc20ApprovalGasSponsoring": {
    "info": {
      "version": "1",
      "description": "The facilitator accepts a raw signed approval transaction and will sponsor the gas fees."
    },
    "schema": {
      "type": "object",
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "required": [
        "from",
        "asset",
        "spender",
        "amount",
        "signedTransaction",
        "version"
      ],
      "properties": {
        "from": {
          "type": "string",
          "pattern": "^0x[a-fA-F0-9]{40}$",
          "description": "The address of the sender."
        },
        "asset": {
          "type": "string",
          "pattern": "^0x[a-fA-F0-9]{40}$",
          "description": "The ERC-20 token contract address to approve."
        },
        "amount": {
          "type": "string",
          "pattern": "^[0-9]+$",
          "description": "Approval amount (uint256)."
        },
        "spender": {
          "type": "string",
          "pattern": "^0x[a-fA-F0-9]{40}$",
          "description": "The address of the spender (Canonical Permit2)."
        },
        "version": {
          "type": "string",
          "pattern": "^[0-9]+(\\.[0-9]+)*$",
          "description": "Schema version identifier."
        },
        "signedTransaction": {
          "type": "string",
          "pattern": "^0x[a-fA-F0-9]+$",
          "description": "RLP-encoded signed transaction calling ERC20.approve()."
        }
      }
    }
  }
}

Provenance

Seen in the source catalog: 2026-07-15 08:31Z
Last indexed by Roundhouse: 2026-08-08 05:20Z
Last enriched (probe, favicon, geo): 2026-09-21 07:15Z
x402 version: 2
Max timeout: 300s
Liveness probe: HTTP 402

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 api.carbon-cashmere.de 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=api.carbon-cashmere.de'
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://api.carbon-cashmere.de/v1/kaspa-derivatives/throughput-health, 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://roundhouseai.io/dashboard/team.

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