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POST
/
v1
/
wallets
/
{id}
/
addresses
/
{addressId}
/
signing
/
message
Child Address Sign Message
curl --request POST \
  --url https://api.blockradar.co/v1/wallets/{id}/addresses/{addressId}/signing/message \
  --header 'Content-Type: application/json' \
  --header 'x-api-key: <api-key>' \
  --data '
{
  "message": "Verify ownership of deposit address for provider onboarding.",
  "reference": "address-verify-001",
  "metadata": {
    "provider": "iron",
    "addressType": "deposit"
  }
}
'
{
  "data": {
    "id": "880f9200-8449-5934-c2df-4769gd78ec20",
    "hash": "0xab123e7cbf335d730dee53f1064e71d462f57908cd5f76bcgdf4f086921f32446bb4929400ebd2f12cbec3ed9d6ac282f76e1d439d03848ef813eb0e87c990c42c",
    "status": "SUCCESS",
    "type": "SIGNED",
    "senderAddress": "0xA234567890abcdef1234567890abcDEF12345678",
    "recipientAddress": "0xA234567890abcdef1234567890abcDEF12345678",
    "signedTransaction": {
      "r": "0xab123e7cbf335d730dee53f1064e71d462f57908cd5f76bcgdf4f086921f3244",
      "s": "0x6bb4929400ebd2f12cbec3ed9d6ac282f76e1d439d03848ef813eb0e87c990c4",
      "v": 28,
      "signature": "0xab123e7cbf335d730dee53f1064e71d462f57908cd5f76bcgdf4f086921f32446bb4929400ebd2f12cbec3ed9d6ac282f76e1d439d03848ef813eb0e87c990c42c"
    },
    "reference": "address-verify-001",
    "metadata": {
      "provider": "iron",
      "addressType": "deposit"
    },
    "confirmed": true,
    "network": "testnet",
    "reason": "Verify ownership of deposit address for provider onboarding.",
    "blockchain": {
      "id": "85ffc132-3972-4c9e-99a5-5cf0ccb688bf",
      "name": "ethereum",
      "slug": "ethereum"
    },
    "wallet": {
      "id": "d236a191-c1d4-423c-a439-54ce6542ca41",
      "name": "Ethereum Master Wallet",
      "address": "0x947514e4B803e312C312da0F1B41fEDdbe15ae7a"
    },
    "createdAt": "2025-03-02T19:00:52.000Z"
  },
  "message": "Message signed successfully",
  "statusCode": 200
}

Authorizations

​
x-api-key
string
header
required

Path Parameters

​
id
string
required
Example:

"YOUR_WALLET_ID"

​
addressId
string
required
Example:

"ADDRESS_OR_ID"

Body

application/json
​
message
string
required

The plain text message to sign

Maximum string length: 4096
Example:

"Verify ownership of deposit address for provider onboarding."

​
reference
string

Internal tracking ID for idempotency

Example:

"address-verify-001"

​
metadata
object

Custom key-value pairs stored with the transaction

Example:
{
  "provider": "iron",
  "addressType": "deposit"
}

Response

Message signed successfully

​
data
object
​
message
string
Example:

"Message signed successfully"

​
statusCode
number
Example:

200