Roundhouse

Hash Generator (SHA-256, HMAC)

Hash generator: compute a cryptographic digest of supplied data: SHA-256, SHA-384, SHA-512, SHA-1, SHA3-256, SHA3-512, Keccak-256, BLAKE2b-256 and BLAKE2b-512, plus HMAC with any of them. Input is UTF-8 text, base64 or hex bytes; output is hex, base64, base64url or base32. Returns the digest, the byte length of the input, and the exact algorithm identifier used.

SearchLiveeip155:8453Exactvia cdp
https://api.duoleads.com/v1/code/hash
HashSha256Sha-256CryptoHashing
Calls · 30d
2→ 0%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 32 snapshots so far.
$21.77
Verified settled volume
560 settlements proven x402 by their on-chain EIP-3009 marker.
$0.050
Listed price
As published in the catalog. Always read the live 402 before paying.
3
Calls · 30d
Upstream's own call count for this endpoint, not ours.
2
Unique payers · 30d
Last called 2026-10-18 05:06Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0xCD673f7e1daD254347AEab6be0DEFe8b9C6b3A39

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.

{
  "error": "Payment required",
  "terms": "https://api.duoleads.com/terms",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0xCD673f7e1daD254347AEab6be0DEFe8b9C6b3A39",
      "amount": "50000",
      "scheme": "exact",
      "network": "eip155:8453",
      "maxTimeoutSeconds": 120
    }
  ],
  "resource": {
    "url": "https://api.duoleads.com/v1/code/hash",
    "tags": [
      "deterministic",
      "no-api-key",
      "code",
      "crypto",
      "hashing"
    ],
    "mimeType": "application/json",
    "description": "Compute a cryptographic digest of supplied data: SHA-256, SHA-384, SHA-512, SHA-1, SHA3-256, SHA3-512, Keccak-256, BLAKE2b-256 and BLAKE2b-512, plus HMAC with any of them. Input is UTF-8 text, base64 or hex bytes; output is hex, base64, base64url or base32. Returns the digest, the byte length of the input, and the exact algorithm identifier used.",
    "serviceName": "Duo Data Utilities"
  },
  "disclaimer": "Factual output of a deterministic computation over public data. Provided as is, with no warranty of accuracy, completeness or availability. Not investment, financial, legal, tax, medical or any other professional advice, and not a recommendation. Verify before relying on it. Terms: https://api.duoleads.com/terms",
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "type": "http",
          "method": "GET",
          "queryParams": {
            "algo": "sha256",
            "data": "hello"
          }
        },
        "output": {
          "type": "json",
          "example": {
            "ok": true,
            "data": {
              "out": "hex",
              "algo": "sha256",
              "hmac": false,
              "digest": "2cf24dba5fb0a30e26e83b2ac5b9e29e1b161e5c1fa7425e73043362938b9824",
              "bit_length": 256,
              "input_bytes": 5
            },
            "meta": {
              "price_usd": "0.05",
              "disclaimer": "Factual output of a deterministic computation over public data. Provided as is, with no warranty of accuracy, completeness or availability. Not investment, financial, legal, tax, medical or any other professional advice, and not a recommendation. Verify before relying on it. Terms: https://api.duoleads.com/terms",
              "request_id": "01K6B7Q4ZC8H3F2M9WXR5TYN0D",
              "computed_at": "2026-09-28T12:00:00.000Z",
              "deterministic": true
            },
            "route": "/v1/code/hash",
            "version": "1.0.0"
          }
        }
      },
      "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": [
                  "algo",
                  "data"
                ],
                "properties": {
                  "out": {
                    "enum": [
                      "hex",
                      "base64",
                      "base64url",
                      "base32"
                    ],
                    "type": "string",
                    "default": "hex",
                    "maxLength": 64,
                    "description": "Digest output encoding: hex (default), base64, base64url or base32."
                  },
                  "algo": {
                    "enum": [
                      "sha256",
                      "sha384",
                      "sha512",
                      "sha1",
                      "sha3-256",
                      "sha3-512",
                      "keccak256",
                      "blake2b-256",
                      "blake2b-512"
                    ],
                    "type": "string",
                    "maxLength": 64,
                    "description": "Digest algorithm."
                  },
                  "data": {
                    "type": "string",
                    "maxLength": 8192,
                    "description": "Input data, interpreted per encoding. At most 8192 characters. An empty value hashes the empty string."
                  },
                  "encoding": {
                    "enum": [
                      "utf8",
                      "base64",
                      "base64url",
                      "hex"
                    ],
                    "type": "string",
                    "default": "utf8",
                    "maxLength": 64,
                    "description": "Encoding of data: utf8 (default), base64, base64url or hex."
                  },
                  "hmac_key": {
                    "type": "string",
                    "maxLength": 512,
                    "description": "If present, computes HMAC with this key."
                  },
                  "hmac_key_encoding": {
                    "enum": [
                      "utf8",
                      "base64",
                      "base64url",
                      "hex"
                    ],
                    "type": "string",
                    "default": "utf8",
                    "maxLength": 64,
                    "description": "Encoding of hmac_key, as encoding."
                  }
                }
              }
            },
            "additionalProperties": false
          },
          "output": {
            "type": "object",
            "required": [
              "type"
            ],
            "properties": {
              "type": {
                "type": "string"
              },
              "example": {
                "type": "object",
                "required": [
                  "ok",
                  "route",
                  "version",
                  "data",
                  "meta"
                ],
                "properties": {
                  "ok": {
                    "type": "boolean",
                    "const": true
                  },
                  "data": {
                    "type": "object"
                  },
                  "meta": {
                    "type": "object",
                    "required": [
                      "request_id",
                      "computed_at",
                      "price_usd",
                      "deterministic",
                      "disclaimer"
                    ],
                    "properties": {
                      "sources": {
                        "type": "array"
                      },
                      "price_usd": {
                        "type": "string"
                      },
                      "disclaimer": {
                        "type": "string"
                      },
                      "request_id": {
                        "type": "string"
                      },
                      "computed_at": {
                        "type": "string"
                      },
                      "deterministic": {
                        "type": "boolean"
                      }
                    }
                  },
                  "route": {
                    "type": "string"
                  },
                  "version": {
                    "type": "string"
                  }
                }
              }
            }
          }
        }
      }
    }
  },
  "x402Version": 2
}

Accepts

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

0.05USDC≈ $0.05 USD
on Base · exact scheme

Pay 0.05 USDC on Base to 0xCD67…b3A39. The signed payment is good for 2 minutes.

Paid to
0xCD67…b3A39
USD Coin contract
0x8335…02913
Payment window
2 minutes
As published
50000 smallest units
The catalog’s raw entry
[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0xCD673f7e1daD254347AEab6be0DEFe8b9C6b3A39",
    "amount": "50000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 120
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "type": "http",
        "method": "GET",
        "queryParams": {
          "algo": "sha256",
          "data": "hello"
        }
      },
      "output": {
        "type": "json",
        "example": {
          "ok": true,
          "data": {
            "out": "hex",
            "algo": "sha256",
            "hmac": false,
            "digest": "2cf24dba5fb0a30e26e83b2ac5b9e29e1b161e5c1fa7425e73043362938b9824",
            "bit_length": 256,
            "input_bytes": 5
          },
          "meta": {
            "price_usd": "0.05",
            "disclaimer": "Factual output of a deterministic computation over public data. Provided as is, with no warranty of accuracy, completeness or availability. Not investment, financial, legal, tax, medical or any other professional advice, and not a recommendation. Verify before relying on it. Terms: https://api.duoleads.com/terms",
            "request_id": "01K6B7Q4ZC8H3F2M9WXR5TYN0D",
            "computed_at": "2026-09-28T12:00:00.000Z",
            "deterministic": true
          },
          "route": "/v1/code/hash",
          "version": "1.0.0"
        }
      }
    },
    "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": [
                "algo",
                "data"
              ],
              "properties": {
                "out": {
                  "enum": [
                    "hex",
                    "base64",
                    "base64url",
                    "base32"
                  ],
                  "type": "string",
                  "default": "hex",
                  "maxLength": 64,
                  "description": "Digest output encoding: hex (default), base64, base64url or base32."
                },
                "algo": {
                  "enum": [
                    "sha256",
                    "sha384",
                    "sha512",
                    "sha1",
                    "sha3-256",
                    "sha3-512",
                    "keccak256",
                    "blake2b-256",
                    "blake2b-512"
                  ],
                  "type": "string",
                  "maxLength": 64,
                  "description": "Digest algorithm."
                },
                "data": {
                  "type": "string",
                  "maxLength": 8192,
                  "description": "Input data, interpreted per encoding. At most 8192 characters. An empty value hashes the empty string."
                },
                "encoding": {
                  "enum": [
                    "utf8",
                    "base64",
                    "base64url",
                    "hex"
                  ],
                  "type": "string",
                  "default": "utf8",
                  "maxLength": 64,
                  "description": "Encoding of data: utf8 (default), base64, base64url or hex."
                },
                "hmac_key": {
                  "type": "string",
                  "maxLength": 512,
                  "description": "If present, computes HMAC with this key."
                },
                "hmac_key_encoding": {
                  "enum": [
                    "utf8",
                    "base64",
                    "base64url",
                    "hex"
                  ],
                  "type": "string",
                  "default": "utf8",
                  "maxLength": 64,
                  "description": "Encoding of hmac_key, as encoding."
                }
              }
            }
          },
          "additionalProperties": false
        },
        "output": {
          "type": "object",
          "required": [
            "type"
          ],
          "properties": {
            "type": {
              "type": "string"
            },
            "example": {
              "type": "object",
              "required": [
                "ok",
                "route",
                "version",
                "data",
                "meta"
              ],
              "properties": {
                "ok": {
                  "const": true
                },
                "data": {
                  "type": "object",
                  "required": [
                    "digest",
                    "algo",
                    "out",
                    "input_bytes",
                    "hmac",
                    "bit_length"
                  ],
                  "properties": {
                    "out": {
                      "type": "string"
                    },
                    "algo": {
                      "type": "string"
                    },
                    "hmac": {
                      "type": "boolean"
                    },
                    "digest": {
                      "type": "string"
                    },
                    "bit_length": {
                      "type": "integer"
                    },
                    "input_bytes": {
                      "type": "integer"
                    }
                  }
                },
                "meta": {
                  "type": "object",
                  "required": [
                    "request_id",
                    "computed_at",
                    "price_usd",
                    "deterministic",
                    "disclaimer"
                  ],
                  "properties": {
                    "sources": {
                      "type": "array",
                      "items": {
                        "type": "object",
                        "required": [
                          "id",
                          "version",
                          "published"
                        ]
                      }
                    },
                    "price_usd": {
                      "type": "string"
                    },
                    "disclaimer": {
                      "type": "string"
                    },
                    "request_id": {
                      "type": "string"
                    },
                    "computed_at": {
                      "type": "string",
                      "description": "RFC 3339 UTC with milliseconds"
                    },
                    "deterministic": {
                      "type": "boolean"
                    }
                  }
                },
                "route": {
                  "const": "/v1/code/hash"
                },
                "version": {
                  "type": "string"
                }
              }
            }
          }
        }
      }
    }
  }
}

Provenance

Seen in the source catalog
2026-10-18 05:06Z
Last indexed by Roundhouse
2026-10-26 20:00Z
Last enriched (probe, favicon, geo)
2026-09-29 00:45Z
x402 version
2
Max timeout
120s
Liveness probe
HTTP 402
Report

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

This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 32 snapshots so far. Verified volume counts only settlements with an on-chain EIP-3009 marker.

Open skill.md
Show the prompt
Using Roundhouse, look up the x402 service Hash Generator (SHA-256, HMAC) 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=Hash%20Generator%20(SHA-256%2C%20HMAC)'
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.duoleads.com/v1/code/hash, 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. Either pay over x402 (mint a personal key for $0.01 at
GET https://api.roundhouseai.io/v0/test/x402), or ask me for an organization key, which I create at
https://roundhouseai.io/dashboard/connections. If you have neither, ask before going further.

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