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POST
/
v1
/
submit
/
sign-payload-passkey
Sign a payload (passkey auth)
curl --request POST \
  --url https://api.example.com/v1/submit/sign-payload-passkey \
  --header 'Content-Type: application/json' \
  --header 'X-Pubkey: <x-pubkey>' \
  --header 'X-Pubkey, X-Timestamp, X-Signature: <api-key>' \
  --header 'X-Signature: <x-signature>' \
  --header 'X-Timestamp: <x-timestamp>' \
  --data '
{
  "signedBody": {
    "type": "ACTIVITY_TYPE_SIGN_RAW_PAYLOAD_V2",
    "timestampMs": "<string>",
    "organizationId": "<string>",
    "parameters": {
      "signWith": "<string>",
      "payload": "<string>",
      "encoding": "PAYLOAD_ENCODING_HEXADECIMAL",
      "hashFunction": "HASH_FUNCTION_NO_OP"
    }
  },
  "transactionId": "550e8400-e29b-41d4-a716-446655440000",
  "webAuthnStamp": "<string>"
}
'
{
  "transactionId": "550e8400-e29b-41d4-a716-446655440000",
  "status": "completed",
  "broadcastedAt": "2025-11-19T21:16:02.894Z",
  "transactionReceipt": {
    "transactionHash": "0x123...",
    "transactionIndex": "<string>",
    "blockHash": "<string>",
    "blockNumber": "<string>",
    "gasUsed": "<string>",
    "effectiveGasPrice": "<string>",
    "blobGasUsed": "<string>",
    "blobGasPrice": "<string>",
    "from": "<string>",
    "to": "<string>",
    "contractAddress": "<string>"
  },
  "fiatDepositInstructions": {
    "currency": "usd",
    "bankName": "Lead Bank",
    "bankAddress": "1801 Main St., Kansas City, MO 64108",
    "paymentRails": [
      "achPush"
    ],
    "bankBeneficiaryName": "John Smith",
    "bankBeneficiaryAddress": "1234 Main St., Kansas City, MO 64108",
    "expectedDepositAmount": "123.456789",
    "bankAccountNumber": "1234567890",
    "bankRoutingNumber": "87654321",
    "iban": "FR12345678901234567890",
    "bic": "BICFR12345"
  },
  "destinationBankAccount": {
    "country": "FRA",
    "last4": "0804",
    "bic": "BICFR12345"
  }
}

Authorizations

​
X-Pubkey, X-Timestamp, X-Signature
string
header
required

Headers

​
X-Pubkey
string
required

Integrator's ECDSA public key (P-256 curve, compressed SEC1 format). Example: 0x038fedef7c12f93bbf342ad8943b7a825a3b41f61c9dc118b2c718efebabbf62fd

​
X-Timestamp
string
required

Unix timestamp in seconds (UTC). Must be within tolerance window (1 minute) to prevent replay attacks. Example: 1760375826

​
X-Signature
string
required

ECDSA signature (DER-encoded, hex with 0x prefix). Signs the message: {timestamp}{METHOD}{path_and_query}{json_body}. Example: 0x3045022100...

Query Parameters

​
chain_id
integer<int32>
required

Chain ID (1 for Ethereum, 8453 for Base)

Required range: x >= 0

Body

application/json

The payload body details signed by the user - passkey auth

​
signedBody
object
required

The object that needs to be signed by the end user to make a transaction.

​
transactionId
string<uuid>
required

A UUID string

Example:

"550e8400-e29b-41d4-a716-446655440000"

​
webAuthnStamp
string
required

Cryptographically passkey signed (stamped). For more info, see wallet authentication.

Response

Transaction sent successfully

​
transactionId
string<uuid>
required

A UUID string

Example:

"550e8400-e29b-41d4-a716-446655440000"

​
status
enum<string>
required

The current status of the transaction.

Available options:
created,
waiting_for_funds,
funds_in_transfer,
processing,
completed
Example:

"completed"

​
broadcastedAt
string<date-time> | null

Exact timestamp when the transaction was broadcasted on-chain. Only available for completed transactions.

Example:

"2025-11-19T21:16:02.894Z"

​
transactionReceipt
object

Ethereum transaction receipt

​
fiatDepositInstructions
object
​
destinationBankAccount
object

Bank account details where the funds will be transferred to (withdrawals only).