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POST
/
v1
/
wallets
/
{walletId}
/
sign-authorization
Sign Authorization (EIP-7702)
curl --request POST \
  --url https://api.beta.getpara.com/v1/wallets/{walletId}/sign-authorization \
  --header 'Content-Type: application/json' \
  --header 'X-API-Key: <api-key>' \
  --data '
{
  "authorization": {
    "chainId": 1,
    "nonce": 0,
    "address": "0x1234567890abcdef1234567890abcdef12345678",
    "contractAddress": "0x1234567890abcdef1234567890abcdef12345678"
  }
}
'
{
  "address": "0x1234567890abcdef1234567890abcdef12345678",
  "chainId": 1,
  "nonce": 0,
  "r": "0xa1b2c3...",
  "s": "0xd4e5f6...",
  "yParity": 0,
  "signature": "a1b2c3d4e5f6..."
}

Authorizations

​
X-API-Key
string
header
default:sk_your_secret_key_here
required

Your partner secret key (server-side only)

Headers

​
X-Request-Id
string<uuid>

UUID for request tracing. Para returns one if omitted.

​
Idempotency-Key
string

Unique key for safe retries on POST endpoints. If a request with the same key is received within 24 hours, the original response is returned without re-executing. Recommended format: UUID v4. Max length 256 characters. Returns 422 if the same key is reused with a different request body. Returns 409 if a request with the same key is still being processed.

Maximum string length: 256

Path Parameters

​
walletId
string
required

Wallet ID

Example:

"0a1b2c3d-4e5f-6789-abcd-ef0123456789"

Body

application/json
​
authorization
object
required

Response

Signed authorization

​
address
string
required

Contract address the authorization delegates to.

Example:

"0x1234567890abcdef1234567890abcdef12345678"

​
chainId
integer
required

Chain ID from the authorization.

Example:

1

​
nonce
integer
required

Nonce from the authorization.

Example:

0

​
r
string
required

ECDSA signature r component (hex with 0x prefix).

Example:

"0xa1b2c3..."

​
s
string
required

ECDSA signature s component (hex with 0x prefix).

Example:

"0xd4e5f6..."

​
yParity
enum<integer>
required

EIP-7702 parity bit (0 or 1). Unlike other signing endpoints that return v (27/28), this uses yParity per the EIP-7702 spec.

Available options:
0,
1
Example:

0

​
signature
string
required

Raw hex-encoded 65-byte signature without 0x prefix (r + s + v).

Example:

"a1b2c3d4e5f6..."