curl --request POST \
  --url https://api.iotools.cloud/v1/tool/hash-collision-probability-calculator \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "hashSize": "256",
  "items": "1000000",
  "targetProbability": "50"
}
'

{
  "tool": "hash-collision-probability-calculator",
  "tool_version": "1.0.2",
  "outputs": {
    "results": [
      {
        "metric": "Hash / ID space",
        "value": "2^256 (≈ 1.16 × 10^77 possible values)"
      },
      {
        "metric": "Items entered (n)",
        "value": "≈ 1.00 × 10^6 (≈ 2^19.9)"
      },
      {
        "metric": "Probability of ≥1 collision",
        "value": "4.32e-64%"
      },
      {
        "metric": "Items for 50% collision risk",
        "value": "≈ 4.01 × 10^38 (≈ 2^128.2)"
      },
      {
        "metric": "Items for 1% collision risk",
        "value": "≈ 4.82 × 10^37 (≈ 2^125.2)"
      },
      {
        "metric": "Items for 0.01% collision risk",
        "value": "≈ 4.81 × 10^36 (≈ 2^121.9)"
      },
      {
        "metric": "Items for 50% collision risk (custom target)",
        "value": "≈ 4.01 × 10^38 (≈ 2^128.2)"
      }
    ]
  },
  "credits_used": 5,
  "credits_remaining": null
}