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POST
/
v1
/
signature
/
sign-hash
Sign Hash
curl --request POST \
  --url https://api.example.com/v1/signature/sign-hash \
  --header 'Content-Type: application/json' \
  --data '
{
  "keyId": "<string>",
  "hash": "<string>",
  "coinType": 123,
  "accountIndex": 123,
  "algorithm": "<string>"
}
'
{
  "signature": "<string>",
  "algorithm": "<string>"
}

​
Sign Hash

Sign a raw hash without protocol-specific processing. Use this for custom signing scenarios or when you’ve already computed the message hash.

​
Request

​
keyId
string
required
KMS key identifier
​
hash
string
required
Hash to sign in hex format (32 bytes for secp256k1)
​
coinType
integer
required
BIP-44 coin type
​
accountIndex
integer
required
Account index for key derivation
​
algorithm
string
Signing algorithm (default: secp256k1)

​
Response

​
signature
string
Signature in hex format
​
algorithm
string
Algorithm used

​
Example

curl -X POST https://api.axonvault.io/v1/signature/sign-hash \
  -H "X-Access-Key: ak_live_abc123" \
  -H "X-Signature: 5d41402abc4b2a76b9719d911017c592" \
  -H "X-Timestamp: 2024-01-15T10:30:00Z" \
  -H "Content-Type: application/json" \
  -d '{
    "keyId": "key_xyz789",
    "hash": "0xabc123def456789...",
    "coinType": 60,
    "accountIndex": 0,
    "algorithm": "secp256k1"
  }'

​
Response Example

{
  "signature": "0x1234567890abcdef...",
  "algorithm": "secp256k1"
}

​
Use Cases

Use CaseDescription
EIP-712Sign typed data messages
Personal SignSign arbitrary messages
Custom ProtocolsSign for non-standard chains

​
Errors

Error TypeStatusDescription
invalid_request400Invalid hash format
key_not_found404Key ID not found
unsupported_algorithm400Algorithm not supported