curl --request POST \
  --url https://api.iotools.cloud/v1/tool/leveling-rise-fall-calculator \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "startingRL": "100.000",
  "readings": "BM to CP1, 1.505, 0.845\nCP1 to CP2, 2.315, 1.865\nCP2 to B, 1.030, 0.675",
  "finalKnownRL": ""
}
'

{
  "tool": "leveling-rise-fall-calculator",
  "tool_version": "1.0.2",
  "outputs": {
    "results": [
      {
        "setup": "BM to CP1",
        "bs": "1.505",
        "fs": "0.845",
        "rise": "0.660",
        "fall": "-",
        "reduced-level": "100.660"
      },
      {
        "setup": "CP1 to CP2",
        "bs": "2.315",
        "fs": "1.865",
        "rise": "0.450",
        "fall": "-",
        "reduced-level": "101.110"
      },
      {
        "setup": "CP2 to B",
        "bs": "1.030",
        "fs": "0.675",
        "rise": "0.355",
        "fall": "-",
        "reduced-level": "101.465"
      }
    ],
    "summary": "Starting RL 100.000 → Final RL 101.465 (net rise 1.465)\nTotal rise 1.465 · Total fall 0.000\nArithmetic check: ΣBS − ΣFS = 1.465 = ΣRise − ΣFall = 1.465 — OK"
  },
  "credits_used": 5,
  "credits_remaining": null
}