Animica

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. Your request as sent is not usable: send a JSON object body with content-type: application/json",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2",
        "decimals": 6
      },
      "payTo": "0x5D17c40FD6b119dc6006C4Ab3C20a917FCaB2aCD",
      "scheme": "exact",
      "network": "base",
      "mimeType": "application/json",
      "resource": "https://animica.dev/x402/random/int",
      "description": "Uniform integers in [min, max] derived from ONE verified randomness draw by rejection sampling (never modulo bias) — up to 1000 per request. The response carries the raw draw, the node's source/health/attestation and the exact rule, so you can recompute every integer offline.",
      "outputSchema": {
        "input": {
          "type": "http",
          "method": "POST",
          "bodyType": "json",
          "bodyFields": {
            "max": {
              "type": "integer",
              "required": true,
              "description": "upper bound, inclusive (>= min)"
            },
            "min": {
              "type": "integer",
              "required": true,
              "description": "lower bound, inclusive"
            },
            "count": {
              "type": "integer",
              "required": false,
              "description": "how many integers, 1..1000 (default 1; alias n)"
            },
            "request_id": {
              "type": "string",
              "required": false,
              "description": "your own tag; mixed into the DRNG seed so you can recompute this exact draw"
            }
          }
        },
        "output": {
          "type": "json",
          "description": "result {ints}, randomness (hex raw draw), source, health, attestation, verification, derivation {rules, steps, recompute} for offline recomputation, payment metadata"
        }
      },
      "maxAmountRequired": "93751",
      "maxTimeoutSeconds": 60
    },
    {
      "asset": "ANM",
      "extra": {
        "unit": "nANM",
        "native": true,
        "chain_id": 1,
        "decimals": 9,
        "rate_side": "bid",
        "how_to_pay": "Sign a TRANSFER of at least `amount` nANM to payTo on Animica (chainId 1) and send the signed raw transaction as payload.rawTransaction. You pay the chain fee; we submit it. Because we sponsor no gas on this lane, it is priced 25% below the USDC price.",
        "rate_source": "nonkyc",
        "genesis_hash": "0xa0892158cf997c56e91d0aa12e60c36037dae34800a2b54111a8fa17ec88b7de",
        "price_display": "1618.623388581 ANM",
        "usd_equivalent": "0.070313",
        "usd_list_price": "0.093751",
        "discount_percent": 25,
        "rate_observed_at": "2026-09-09T12:45:18.000Z",
        "rate_usd_per_anm": "0.00004344"
      },
      "payTo": "anim1zqpsmegc0qcvzjfukm89xs0zeu3eqyyyel7kelehuszvwfarqypky2gr946ga",
      "scheme": "exact",
      "network": "animica:1",
      "mimeType": "application/json",
      "resource": "https://animica.dev/x402/random/int",
      "description": "Uniform integers in [min, max] derived from ONE verified randomness draw by rejection sampling (never modulo bias) — up to 1000 per request. The response carries the raw draw, the node's source/health/attestation and the exact rule, so you can recompute every integer offline.",
      "outputSchema": {
        "input": {
          "type": "http",
          "method": "POST",
          "bodyType": "json",
          "bodyFields": {
            "max": {
              "type": "integer",
              "required": true,
              "description": "upper bound, inclusive (>= min)"
            },
            "min": {
              "type": "integer",
              "required": true,
              "description": "lower bound, inclusive"
            },
            "count": {
              "type": "integer",
              "required": false,
              "description": "how many integers, 1..1000 (default 1; alias n)"
            },
            "request_id": {
              "type": "string",
              "required": false,
              "description": "your own tag; mixed into the DRNG seed so you can recompute this exact draw"
            }
          }
        },
        "output": {
          "type": "json",
          "description": "result {ints}, randomness (hex raw draw), source, health, attestation, verification, derivation {rules, steps, recompute} for offline recomputation, payment metadata"
        }
      },
      "maxAmountRequired": "1618623388581",
      "maxTimeoutSeconds": 60
    }
  ],
  "freeTrial": {
    "url": "https://animica.dev/x402/random/int/trial",
    "note": "Same code and same response shape as the paid endpoint. No payment, no payment headers. Quota is per client per UTC day; when it is spent this endpoint says so and points back here.",
    "price": "0",
    "endpoint": "POST /x402/random/int/trial",
    "limit_per_day": 3
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "body": {
            "max": 6,
            "min": 1,
            "count": 3
          },
          "type": "http",
          "method": "POST",
          "bodyType": "json"
        },
        "output": {
          "type": "json",
          "example": {
            "bytes": 32,
            "health": {
              "passed": true,
              "min_entropy_per_byte": 7.8216
            },
            "result": {
              "max": 6,
              "min": 1,
              "ints": [
                5,
                1,
                2
              ],
              "count": 3
            },
            "source": {
              "name": "software-fallback",
              "model": "os.urandom CSPRNG",
              "notes": "non-attested fallback for testing/degraded mode",
              "vendor": "os",
              "attested": false,
              "is_quantum": false,
              "device_path": null,
              "is_hardware": false
            },
            "product": "random_int",
            "encoding": "hex",
            "derivation": {
              "kind": "range",
              "rules": {
                "seed": "seed = sha3_256(\"animica/qrng/public/v1\" || \"|k:\" || kind || \"|r:\" || request_id || \"|b:\" || bytes(randomness))",
                "stream": "stream = sha3_256(seed || be8(counter)) for counter = 0,1,2,… concatenated; consumed left to right, never reused",
                "uniform_int": "randbelow(n): k = floor((bitlen(n)+7)/8)+1 bytes per attempt, read big-endian as x; limit = 2^(8k); accept when x < limit - (limit mod n); value = x mod n. Rejected attempts still consume their k bytes. n <= 1 consumes nothing and returns 0. This is rejection sampling — plain \"x mod n\" would bias small values."
              },
              "steps": [
                "seed the DRNG with kind=\"range\" and your request_id over the raw randomness above",
                "for i = 0..2: ints[i] = 1 + randbelow(6)"
              ],
              "domain": "animica/qrng/public/v1",
              "seed_hex": "5fb4cc0e8007c201060453ee9b7cacb38444d32d76d423c61e601117fadd3068",
              "verifier": {
                "api": "AnimicaBeacon.drngSeed(entropy, kind, request_id) + AnimicaBeacon.QDRNG reproduce the stream; AnimicaBeacon.verifyResult(derivation.recompute) === true whenever `recompute` is present",
                "file": "randomness/beacon_api/static/verify.js (Animica repo, gitlab.com/Animica) — zero-dependency, runs in Node and the browser",
                "note": "verify.js calls the seed material `beacon` because it was written for beacon rounds. This product is NOT a beacon round: the seed material is the raw `randomness` bytes above, which the node signed (see `verification`)."
              },
              "algorithm": "uniform-int-rejection-sampling",
              "recompute": {
                "kind": "range",
                "output": [
                  5,
                  1,
                  2
                ],
                "params": {
                  "hi": 6,
                  "lo": 1,
                  "count": 3
                },
                "round_id": 0,
                "beacon_hex": "8e8d85d9c03247ffdff7b3db1c917b7a0e97a569e8cf098071dd91cc9121ae55",
                "request_id": ""
              },
              "request_id": "",
              "entropy_hex": "8e8d85d9c03247ffdff7b3db1c917b7a0e97a569e8cf098071dd91cc9121ae55",
              "stream_bytes_consumed": 6
            },
            "randomness": "8e8d85d9c03247ffdff7b3db1c917b7a0e97a569e8cf098071dd91cc9121ae55",
            "attestation": {
              "alg": "ed25519",
              "backend": "software",
              "attested": false,
              "digest_hex": "14a2636cf09e18539ab6ed62de65af350c2f6014d269b74d127fc1604c7aa68a",
              "signature_hex": "bee4d32ee31dd92b07f1eee3113ed722c3c96c5fae98c509bcca8f66a5ceaff3eb4a6cd41cd97fc32deebdeeab18b4affea467549dd4ef387ddbdae6d415e900",
              "public_key_hex": "8a2228f4bde8f72964a7ff4aa759f24932ae1cccd9462ad94ca6e508d6b87a64"
            },
            "verification": {
              "rules": [
                "attestation.digest_hex == sha3_256(bytes(randomness))",
                "ed25519_verify(pubkey=attestation.public_key_hex, message=raw_bytes(attestation.digest_hex), signature=attestation.signature_hex)"
              ],
              "method": "signed-digest-attestation",
              "attested": false,
              "verifier": "randomness/beacon_api/static/verify.js in the animica repo (gitlab.com/Animica) — dependency-free Node module exporting sha3_256; pair with any ed25519 verifier",
              "trust_model": "signed by the serving node, not client-recomputable: you trust the node's entropy source, then verify it signed exactly these bytes. Check health.passed and attestation.attested before relying on it."
            }
          }
        }
      },
      "schema": {
        "type": "object",
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "required": [
          "input"
        ],
        "properties": {
          "input": {
            "type": "object",
            "required": [
              "type",
              "method"
            ],
            "properties": {
              "body": {
                "type": "object",
                "required": [
                  "min",
                  "max"
                ],
                "properties": {
                  "max": {
                    "type": "integer",
                    "description": "upper bound, inclusive (>= min)"
                  },
                  "min": {
                    "type": "integer",
                    "description": "lower bound, inclusive"
                  },
                  "count": {
                    "type": "integer",
                    "description": "how many integers, 1..1000 (default 1; alias n)"
                  },
                  "request_id": {
                    "type": "string",
                    "description": "your own tag; mixed into the DRNG seed so you can recompute this exact draw"
                  }
                }
              },
              "type": {
                "type": "string",
                "const": "http"
              },
              "method": {
                "enum": [
                  "POST"
                ],
                "type": "string"
              },
              "bodyType": {
                "enum": [
                  "json"
                ],
                "type": "string"
              }
            }
          },
          "output": {
            "type": "object",
            "required": [
              "type"
            ],
            "properties": {
              "type": {
                "type": "string"
              },
              "example": {}
            }
          }
        }
      },
      "discoverable": true
    }
  },
  "x402Version": 1
}

Accepts

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

[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2",
      "decimals": 6
    },
    "payTo": "0x5D17c40FD6b119dc6006C4Ab3C20a917FCaB2aCD",
    "amount": "5808",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 60
  },
  {
    "asset": "ANM",
    "extra": {
      "unit": "nANM",
      "native": true,
      "chain_id": 1,
      "decimals": 9,
      "rate_side": "bid",
      "how_to_pay": "Sign a TRANSFER of at least `amount` nANM to payTo on Animica (chainId 1) and send the signed raw transaction as payload.rawTransaction. You pay the chain fee; we submit it. Because we sponsor no gas on this lane, it is priced 25% below the USDC price.",
      "rate_source": "nonkyc",
      "genesis_hash": "0xa0892158cf997c56e91d0aa12e60c36037dae34800a2b54111a8fa17ec88b7de",
      "price_display": "68.989547038 ANM",
      "usd_equivalent": "0.004356",
      "usd_list_price": "0.005808",
      "discount_percent": 25,
      "rate_observed_at": "2026-08-22T08:39:58.000Z",
      "rate_usd_per_anm": "0.00006314"
    },
    "payTo": "anim1zqpsmegc0qcvzjfukm89xs0zeu3eqyyyel7kelehuszvwfarqypky2gr946ga",
    "amount": "68989547038",
    "scheme": "exact",
    "network": "animica:1",
    "maxTimeoutSeconds": 60
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "body": {
          "max": 6,
          "min": 1,
          "count": 3
        },
        "type": "http",
        "method": "POST",
        "bodyType": "json"
      },
      "output": {
        "type": "json",
        "example": {
          "bytes": 32,
          "health": {
            "passed": true,
            "min_entropy_per_byte": 7.8216
          },
          "result": {
            "max": 6,
            "min": 1,
            "ints": [
              5,
              1,
              2
            ],
            "count": 3
          },
          "source": {
            "name": "software-fallback",
            "model": "os.urandom CSPRNG",
            "notes": "non-attested fallback for testing/degraded mode",
            "vendor": "os",
            "attested": false,
            "is_quantum": false,
            "device_path": null,
            "is_hardware": false
          },
          "product": "random_int",
          "encoding": "hex",
          "derivation": {
            "kind": "range",
            "rules": {
              "seed": "seed = sha3_256(\"animica/qrng/public/v1\" || \"|k:\" || kind || \"|r:\" || request_id || \"|b:\" || bytes(randomness))",
              "stream": "stream = sha3_256(seed || be8(counter)) for counter = 0,1,2,… concatenated; consumed left to right, never reused",
              "uniform_int": "randbelow(n): k = floor((bitlen(n)+7)/8)+1 bytes per attempt, read big-endian as x; limit = 2^(8k); accept when x < limit - (limit mod n); value = x mod n. Rejected attempts still consume their k bytes. n <= 1 consumes nothing and returns 0. This is rejection sampling — plain \"x mod n\" would bias small values."
            },
            "steps": [
              "seed the DRNG with kind=\"range\" and your request_id over the raw randomness above",
              "for i = 0..2: ints[i] = 1 + randbelow(6)"
            ],
            "domain": "animica/qrng/public/v1",
            "seed_hex": "5fb4cc0e8007c201060453ee9b7cacb38444d32d76d423c61e601117fadd3068",
            "verifier": {
              "api": "AnimicaBeacon.drngSeed(entropy, kind, request_id) + AnimicaBeacon.QDRNG reproduce the stream; AnimicaBeacon.verifyResult(derivation.recompute) === true whenever `recompute` is present",
              "file": "randomness/beacon_api/static/verify.js (Animica repo, github.com/animicaorg) — zero-dependency, runs in Node and the browser",
              "note": "verify.js calls the seed material `beacon` because it was written for beacon rounds. This product is NOT a beacon round: the seed material is the raw `randomness` bytes above, which the node signed (see `verification`)."
            },
            "algorithm": "uniform-int-rejection-sampling",
            "recompute": {
              "kind": "range",
              "output": [
                5,
                1,
                2
              ],
              "params": {
                "hi": 6,
                "lo": 1,
                "count": 3
              },
              "round_id": 0,
              "beacon_hex": "8e8d85d9c03247ffdff7b3db1c917b7a0e97a569e8cf098071dd91cc9121ae55",
              "request_id": ""
            },
            "request_id": "",
            "entropy_hex": "8e8d85d9c03247ffdff7b3db1c917b7a0e97a569e8cf098071dd91cc9121ae55",
            "stream_bytes_consumed": 6
          },
          "randomness": "8e8d85d9c03247ffdff7b3db1c917b7a0e97a569e8cf098071dd91cc9121ae55",
          "attestation": {
            "alg": "ed25519",
            "backend": "software",
            "attested": false,
            "digest_hex": "14a2636cf09e18539ab6ed62de65af350c2f6014d269b74d127fc1604c7aa68a",
            "signature_hex": "bee4d32ee31dd92b07f1eee3113ed722c3c96c5fae98c509bcca8f66a5ceaff3eb4a6cd41cd97fc32deebdeeab18b4affea467549dd4ef387ddbdae6d415e900",
            "public_key_hex": "8a2228f4bde8f72964a7ff4aa759f24932ae1cccd9462ad94ca6e508d6b87a64"
          },
          "verification": {
            "rules": [
              "attestation.digest_hex == sha3_256(bytes(randomness))",
              "ed25519_verify(pubkey=attestation.public_key_hex, message=raw_bytes(attestation.digest_hex), signature=attestation.signature_hex)"
            ],
            "method": "signed-digest-attestation",
            "attested": false,
            "verifier": "randomness/beacon_api/static/verify.js in the animica repo (github.com/animicaorg) — dependency-free Node module exporting sha3_256; pair with any ed25519 verifier",
            "trust_model": "signed by the serving node, not client-recomputable: you trust the node's entropy source, then verify it signed exactly these bytes. Check health.passed and attestation.attested before relying on it."
          }
        }
      }
    },
    "schema": {
      "type": "object",
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "required": [
        "input"
      ],
      "properties": {
        "input": {
          "type": "object",
          "required": [
            "type",
            "method"
          ],
          "properties": {
            "body": {
              "type": "object",
              "required": [
                "min",
                "max"
              ],
              "properties": {
                "max": {
                  "type": "integer",
                  "description": "upper bound, inclusive (>= min)"
                },
                "min": {
                  "type": "integer",
                  "description": "lower bound, inclusive"
                },
                "count": {
                  "type": "integer",
                  "description": "how many integers, 1..1000 (default 1; alias n)"
                },
                "request_id": {
                  "type": "string",
                  "description": "your own tag; mixed into the DRNG seed so you can recompute this exact draw"
                }
              }
            },
            "type": {
              "type": "string",
              "const": "http"
            },
            "method": {
              "enum": [
                "POST"
              ],
              "type": "string"
            },
            "bodyType": {
              "enum": [
                "json"
              ],
              "type": "string"
            }
          }
        },
        "output": {
          "type": "object",
          "required": [
            "type"
          ],
          "properties": {
            "type": {
              "type": "string"
            },
            "example": {}
          }
        }
      }
    },
    "discoverable": true
  },
  "animica": {
    "name": "Uniform random integers",
    "price": "0.005808",
    "terms": {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "pay_to": "0x5D17c40FD6b119dc6006C4Ab3C20a917FCaB2aCD",
      "scheme": "exact",
      "network": "eip155:8453",
      "chain_id": 8453,
      "amount_atomic": "5808"
    },
    "catalog": "https://animica.dev/.well-known/x402",
    "openapi": "https://animica.dev/x402/openapi.json",
    "product": "random_int",
    "currency": "USDC",
    "provider": "Animica",
    "free_trial": {
      "url": "https://animica.dev/x402/random/int/trial",
      "note": "Same code and same response shape as the paid endpoint. No payment, no payment headers. Quota is per client per UTC day; when it is spent this endpoint says so and points back here.",
      "price": "0",
      "endpoint": "POST /x402/random/int/trial",
      "limit_per_day": 3
    },
    "description": "Uniform integers in [min, max] derived from ONE verified randomness draw by rejection sampling (never modulo bias) — up to 1000 per request. The response carries the raw draw, the node's source/health/attestation and the exact rule, so you can recompute every integer offline.",
    "content_type": "application/json",
    "x402_version": 2,
    "documentation": "https://animica.dev/x402#product-random_int"
  },
  "discovery": {
    "info": {
      "input": {
        "type": "http",
        "method": "POST",
        "bodyType": "json",
        "bodyFields": {
          "max": {
            "type": "integer",
            "required": true,
            "description": "upper bound, inclusive (>= min)"
          },
          "min": {
            "type": "integer",
            "required": true,
            "description": "lower bound, inclusive"
          },
          "count": {
            "type": "integer",
            "required": false,
            "description": "how many integers, 1..1000 (default 1; alias n)"
          },
          "request_id": {
            "type": "string",
            "required": false,
            "description": "your own tag; mixed into the DRNG seed so you can recompute this exact draw"
          }
        }
      },
      "output": {
        "type": "json",
        "description": "result {ints}, randomness (hex raw draw), source, health, attestation, verification, derivation {rules, steps, recompute} for offline recomputation, payment metadata"
      },
      "entropy": {
        "note": "observed on the gateway's own readiness draw, published unpaid so the trust model is knowable before purchase; the same fields ride verbatim on every paid response",
        "model": "os.urandom CSPRNG",
        "source": "software-fallback",
        "vendor": "os",
        "attested": false,
        "is_quantum": false,
        "is_hardware": false,
        "observed_at": "2026-08-22T08:41:02.928Z",
        "health_passed": true,
        "signer_backend": "software",
        "min_entropy_per_byte": 7.7725
      }
    },
    "discoverable": true
  }
}

Provenance

Seen in the source catalog

2026-08-22 08:41Z

Last indexed by Roundhouse

2026-09-19 00:30Z

Last enriched (probe, favicon, geo)

2026-09-23 19:45Z

x402 version

2

Max timeout

60s

Liveness probe

HTTP 0