{
  "x402Version": 2,
  "id": 12985,
  "slug": "12985",
  "resource": "https://x402.professorsausages.com/sfx/mutate",
  "description": "Mutate a known-good seed's sound (classic sfxr mutate) — nearby variations by parameter perturbation",
  "type": "http",
  "accepts": [
    {
      "scheme": "exact",
      "network": "eip155:8453",
      "payTo": "0x54ebFCF3870439B9db62381848c5DabC05c70d5B",
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "amount": "10000",
      "maxTimeoutSeconds": 60
    }
  ],
  "outputSchema": {
    "bazaar": {
      "category": "audio",
      "info": {
        "input": {
          "method": "GET",
          "queryParams": {
            "amount": "Mutation magnitude.",
            "bits": "Bit depth. Overrides the format profile; the override is echoed in formatOverride.",
            "format": "Fidelity profile: wav is 44.1k/16, wav8 is 44.1k/8, retro is 22k/8. Explicit bits/sampleRate override it.",
            "preset": "Base preset. Omit for a random base.",
            "sampleRate": "Sample rate in Hz. Overrides the format profile; the override is echoed in formatOverride.",
            "seed": "Integer seed of the base sound. Omit for a random seed."
          },
          "type": "http"
        },
        "output": {
          "properties": {
            "amount": {
              "type": "number"
            },
            "bitsPerSample": {
              "enum": [
                8,
                16
              ],
              "type": "integer"
            },
            "byteLength": {
              "description": "Total WAV size in bytes.",
              "type": "integer"
            },
            "clipped": {
              "description": "Samples clamped to range (0 = clean).",
              "type": "integer"
            },
            "durationMs": {
              "type": "integer"
            },
            "format": {
              "description": "The fidelity profile actually rendered (not necessarily the one requested).",
              "enum": [
                "wav16",
                "wav8",
                "retro",
                "custom"
              ],
              "type": "string"
            },
            "formatOverride": {
              "description": "Only present when explicit bits/sampleRate overrode the requested `format`.",
              "properties": {
                "applied": {
                  "enum": [
                    "wav16",
                    "wav8",
                    "retro",
                    "custom"
                  ],
                  "type": "string"
                },
                "detail": {
                  "type": "string"
                },
                "overriddenBy": {
                  "items": {
                    "enum": [
                      "bits",
                      "sampleRate"
                    ],
                    "type": "string"
                  },
                  "type": "array"
                },
                "requested": {
                  "description": "The `format` the caller sent.",
                  "type": "string"
                }
              },
              "required": [
                "requested",
                "applied",
                "overriddenBy",
                "detail"
              ],
              "type": "object"
            },
            "mimeType": {
              "enum": [
                "audio/wav"
              ],
              "type": "string"
            },
            "params": {
              "description": "SFXR synthesis parameters. wave_type: 0=square,1=sawtooth,2=sine,3=noise. All p_* are on [0,1] except SIGNED ones on [-1,1]. sample_rate/sample_size reflect the chosen output.",
              "properties": {
                "p_arp_mod": {
                  "description": "SIGNED [-1,1]",
                  "type": "number"
                },
                "p_arp_speed": {
                  "type": "number"
                },
                "p_base_freq": {
                  "type": "number"
                },
                "p_duty": {
                  "type": "number"
                },
                "p_duty_ramp": {
                  "description": "SIGNED [-1,1]",
                  "type": "number"
                },
                "p_env_attack": {
                  "type": "number"
                },
                "p_env_decay": {
                  "type": "number"
                },
                "p_env_punch": {
                  "type": "number"
                },
                "p_env_sustain": {
                  "type": "number"
                },
                "p_freq_dramp": {
                  "description": "SIGNED [-1,1]",
                  "type": "number"
                },
                "p_freq_limit": {
                  "type": "number"
                },
                "p_freq_ramp": {
                  "description": "SIGNED [-1,1]",
                  "type": "number"
                },
                "p_hpf_freq": {
                  "type": "number"
                },
                "p_hpf_ramp": {
                  "description": "SIGNED [-1,1]",
                  "type": "number"
                },
                "p_lpf_freq": {
                  "type": "number"
                },
                "p_lpf_ramp": {
                  "description": "SIGNED [-1,1]",
                  "type": "number"
                },
                "p_lpf_resonance": {
                  "type": "number"
                },
                "p_pha_offset": {
                  "description": "SIGNED [-1,1]",
                  "type": "number"
                },
                "p_pha_ramp": {
                  "description": "SIGNED [-1,1]",
                  "type": "number"
                },
                "p_repeat_speed": {
                  "type": "number"
                },
                "p_vib_speed": {
                  "type": "number"
                },
                "p_vib_strength": {
                  "type": "number"
                },
                "sample_rate": {
                  "type": "integer"
                },
                "sample_size": {
                  "enum": [
                    8,
                    16
                  ],
                  "type": "integer"
                },
                "sound_vol": {
                  "type": "number"
                },
                "wave_type": {
                  "enum": [
                    0,
                    1,
                    2,
                    3
                  ],
                  "type": "integer"
                }
              },
              "type": "object"
            },
            "preset": {
              "type": "string"
            },
            "sampleCount": {
              "type": "integer"
            },
            "sampleRate": {
              "type": "integer"
            },
            "seed": {
              "description": "The integer seed used — pass it back for byte-identical output.",
              "type": "integer"
            },
            "wav_base64": {
              "description": "Base64-encoded WAV (RIFF PCM, mono).",
              "type": "string"
            }
          },
          "required": [
            "seed",
            "wav_base64",
            "params"
          ],
          "type": "object"
        }
      },
      "routeTemplate": "https://x402.professorsausages.com/sfx/mutate",
      "schema": {
        "properties": {
          "input": {
            "type": "object"
          },
          "output": {
            "type": "object"
          }
        },
        "required": [
          "input"
        ],
        "type": "object"
      }
    },
    "catalog": {
      "catalogUrl": "https://x402.professorsausages.com/?ref=402&v=minimal&from=sfx",
      "message": "This endpoint is 1 of 35 pay-per-call APIs for agents — all same x402 payment + auth. Browse the full menu free (no payment) at the catalog URL; every API serves a free real sample record at /<api>/sample.",
      "strategy": "minimal"
    },
    "discount": {
      "header": "X-Intent",
      "hint": "Send X-Intent: <40+ chars describing what you're building and what data you need> for 50% off this call.",
      "off": "50%"
    },
    "help": {
      "docs": "https://x402.professorsausages.com/sfx",
      "example": "https://x402.professorsausages.com/sfx/mutate",
      "openapi": "https://x402.professorsausages.com/sfx/openapi.json",
      "sample": "https://x402.professorsausages.com/sfx/sample"
    },
    "sample": {
      "hint": "A real cached response from this API (with its capture timestamp), free — judge the data quality before paying.",
      "url": "https://x402.professorsausages.com/sfx/sample"
    },
    "suggest": {
      "hint": "Missing data you'd pay for? POST {want, would_pay_usd} — free. The most-requested datasets get built first.",
      "url": "https://x402.professorsausages.com/suggest"
    }
  },
  "tags": [
    "bazaar",
    "catalog",
    "discount",
    "help",
    "sample",
    "suggest"
  ],
  "sourceHost": "x402.professorsausages.com",
  "lastUpdated": "2026-09-16T18:40:02.684Z",
  "quality": {
    "calls30d": 3,
    "uniquePayers30d": 2,
    "lastCalledAt": "2026-09-16T18:40:02.163Z"
  },
  "liveness": {},
  "verified": false,
  "featured": false,
  "provider": {
    "host": "x402.professorsausages.com",
    "manifest_name": "x402.professorsausages.com",
    "source": "cdp-mirror",
    "source_manifest_url": "https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources",
    "submitted_at": "2026-09-18T22:00:31.484Z"
  }
}