curl --request POST \
  --url https://api.iotools.cloud/v1/tool/merkle-tree-generator \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "merkleLeaves": "a\nb\nc\nd",
  "merkleHash": "sha-256",
  "merkleLeafEncoding": "utf8",
  "merkleOddRule": "duplicate",
  "merkleConcat": "bytes"
}
'

{
  "tool": "merkle-tree-generator",
  "tool_version": "1.0.1",
  "outputs": {
    "merkleRoot": "0x14ede5e8e97ad9372327728f5099b95604a39593cac3bd38a343ad76205213e7",
    "merkleLevels": [
      {
        "node": "Leaf 0",
        "leaf-input": "a",
        "hash-hex": "ca978112ca1bbdcafac231b39a23dc4da786eff8147c4e72b9807785afee48bb"
      },
      {
        "node": "Leaf 1",
        "leaf-input": "b",
        "hash-hex": "3e23e8160039594a33894f6564e1b1348bbd7a0088d42c4acb73eeaed59c009d"
      },
      {
        "node": "Leaf 2",
        "leaf-input": "c",
        "hash-hex": "2e7d2c03a9507ae265ecf5b5356885a53393a2029d241394997265a1a25aefc6"
      },
      {
        "node": "Leaf 3",
        "leaf-input": "d",
        "hash-hex": "18ac3e7343f016890c510e93f935261169d9e3f565436429830faf0934f4f8e4"
      },
      {
        "node": "L1 · 0",
        "leaf-input": "—",
        "hash-hex": "e5a01fee14e0ed5c48714f22180f25ad8365b53f9779f79dc4a3d7e93963f94a"
      },
      {
        "node": "L1 · 1",
        "leaf-input": "—",
        "hash-hex": "bffe0b34dba16bc6fac17c08bac55d676cded5a4ade41fe2c9924a5dde8f3e5b"
      },
      {
        "node": "Root",
        "leaf-input": "—",
        "hash-hex": "14ede5e8e97ad9372327728f5099b95604a39593cac3bd38a343ad76205213e7"
      }
    ]
  },
  "credits_used": 3,
  "credits_remaining": null
}