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GET
/
v1
/
compliance
/
merkle
/
proof
/
{address}
curl https://api.engram.training/v1/compliance/merkle/proof/0xd882cfc20f52f2599d84b8e8d58c7fb62cfe344b

{
  "address": "0xd882cfc20f52f2599d84b8e8d58c7fb62cfe344b",
  "sanctioned": true,
  "leafIndex": 42,
  "proof": [
    "a1b2c3d4e5f6...",
    "f6e5d4c3b2a1...",
    "1234567890ab..."
  ],
  "root": "16890407db296faf7ff3c80deb93f0bf..."
}
Returns a Merkle inclusion proof for the given address. If the address is in the sanctions dataset, the proof can be submitted to the smart contract for on-chain verification. Free — no credits charged.

​
Path Parameters

​
address
string
required
Wallet address to check (any chain — Ethereum, Bitcoin, Stellar, Solana, etc.)

​
Response

​
address
string
The queried address.
​
sanctioned
boolean
true if the address is in the sanctions dataset.
​
leafIndex
number
The leaf position in the Merkle tree. -1 if not sanctioned.
​
proof
string[]
Array of hex-encoded sibling hashes (the Merkle path). Empty if not sanctioned.
​
root
string
The current Merkle root (hex-encoded, 32 bytes). Matches the on-chain root.

​
On-Chain Verification

The proof returned by this endpoint can be verified directly on the smart contract: 
contract.verify_merkle_proof(
  address,     // The address string
  proof,       // Vec<BytesN<32>> — the sibling hashes
  leaf_index   // u32 — the leaf position
)
// Returns: true if the address is in the sanctioned dataset

curl https://api.engram.training/v1/compliance/merkle/proof/0xd882cfc20f52f2599d84b8e8d58c7fb62cfe344b

{
  "address": "0xd882cfc20f52f2599d84b8e8d58c7fb62cfe344b",
  "sanctioned": true,
  "leafIndex": 42,
  "proof": [
    "a1b2c3d4e5f6...",
    "f6e5d4c3b2a1...",
    "1234567890ab..."
  ],
  "root": "16890407db296faf7ff3c80deb93f0bf..."
}