Session Keys

A session key is a separate signer that a Deposit Wallet Owner authorizes to trade for a Deposit Wallet. It lets an integration perform routine trading without using the owner’s key. A session key cannot withdraw funds from the Deposit Wallet.

Session keys work only with Deposit Wallets. A dedicated migration flow from Safe Wallets and Proxy Wallets is planned.

A session key can be scoped to trade on specific supported venues or all venues:

CLOB: Place prediction market orders on the central limit order book.
Combos: Trade Combos through RFQs.
All: A shortcut that grants access to CLOB, Combos, and any future supported venues.

Authorize a Session Key

The Deposit Wallet Owner authorizes a session signer address with an expiration and scoped permissions.

Session keys are Externally Owned Accounts (EOAs). Keep their private keys secret to prevent unauthorized trading on behalf of your Deposit Wallet.

Authorizing a session key requires a Builder API key. See Create New Accounts to generate one.

During the initial rollout, contact the Polymarket team to authorize your Builder API key for session-key management.

TypeScript
Python
API

Generate a Session Key

First, generate a fresh EVM keypair for the session key.

import { generatePrivateKey, privateKeyToAccount } from "viem/accounts";

const sessionKeyPrivateKey = generatePrivateKey();
const { address: sessionKeyAddress } =
  privateKeyToAccount(sessionKeyPrivateKey);

Store your private key in a secrets manager or another secure key store.

Create the Deposit Wallet Owner Client

Then, create a SecureClient with the Deposit Wallet Owner’s private key and Builder API credentials.

import { createSecureClient } from "@polymarket/client";
import { builderApiKey } from "@polymarket/client/node";
import { privateKey } from "@polymarket/client/viem";

const secureClient = await createSecureClient({
  signer: privateKey(process.env.POLYMARKET_PRIVATE_KEY),
  wallet: process.env.POLYMARKET_DEPOSIT_WALLET!,
  apiKey: builderApiKey({
    key: process.env.POLYMARKET_BUILDER_API_KEY!,
    secret: process.env.POLYMARKET_BUILDER_SECRET!,
    passphrase: process.env.POLYMARKET_BUILDER_PASSPHRASE!,
  }),
});

Authorize the Session Key

Finally, call authorizeSessionKey() to authorize your session key with the desired expiration.

const authorization = await secureClient.authorizeSessionKey({
  address: sessionKeyAddress,
  validUntil: Math.floor(Date.now() / 1_000) + 2 * 60 * 60,
});

// authorization: AuthorizeSessionKeyResult

You can also authorize only the desired trading venues with the scopes parameter:

import { SessionKeyKnownScope } from "@polymarket/client";

const scopedAuthorization = await secureClient.authorizeSessionKey({
  address: sessionKeyAddress,
  scopes: [SessionKeyKnownScope.CLOB, SessionKeyKnownScope.COMBOSRFQ],
  validUntil: Math.floor(Date.now() / 1_000) + 2 * 60 * 60,
});

// scopedAuthorization: AuthorizeSessionKeyResult

Generate a Session Key

First, generate a fresh EVM keypair for the session key.

from eth_account import Account

session_key = Account.create()
session_key_private_key = "0x" + session_key.key.hex().removeprefix("0x")
session_key_address = session_key.address

Store your private key in a secrets manager or another secure key store.

Create the Deposit Wallet Owner Client

Then, create an AsyncSecureClient with the Deposit Wallet Owner’s private key and Builder API credentials.

import os

from polymarket import AsyncSecureClient, BuilderApiKey

secure_client = await AsyncSecureClient.create(
    private_key=os.environ["POLYMARKET_PRIVATE_KEY"],
    wallet=os.environ["POLYMARKET_DEPOSIT_WALLET"],
    api_key=BuilderApiKey(
        key=os.environ["POLYMARKET_BUILDER_API_KEY"],
        secret=os.environ["POLYMARKET_BUILDER_SECRET"],
        passphrase=os.environ["POLYMARKET_BUILDER_PASSPHRASE"],
    ),
)

Authorize the Session Key

Finally, call authorize_session_key() to authorize your session key with the desired expiration.

from datetime import UTC, datetime, timedelta

authorization = await secure_client.authorize_session_key(
    address=session_key_address,
    valid_until=datetime.now(UTC) + timedelta(hours=2),
)

# authorization: AuthorizeSessionKeyResult

You can also authorize only the desired trading venues with the scopes parameter:

from polymarket import SessionKeyKnownScope

scoped_authorization = await secure_client.authorize_session_key(
    address=session_key_address,
    scopes=(
        SessionKeyKnownScope.CLOB,
        SessionKeyKnownScope.COMBOSRFQ,
    ),
    valid_until=datetime.now(UTC) + timedelta(hours=2),
)

# scoped_authorization: AuthorizeSessionKeyResult

Authorize the session signer through the Relayer, then confirm that it is available for trading.

Generate a Session Key

First, generate a fresh EVM keypair for the session key:

$ cast wallet new
Successfully created new keypair.
Address: <session_signer_address>
Private key: <session_signer_private_key>

import { generatePrivateKey, privateKeyToAccount } from "viem/accounts";

const sessionSignerPrivateKey = generatePrivateKey();
const { address: sessionSignerAddress } = privateKeyToAccount(
  sessionSignerPrivateKey,
);

Store the <session_signer_private_key> in a secrets manager or another secure key store.

Fetch the Wallet Nonce

Then, fetch the Deposit Wallet’s WALLET nonce by passing the Deposit Wallet Owner address.

curl -G "https://relayer-v2.polymarket.com/v1/account/transactions/params" \
  --data-urlencode "address=<deposit_wallet_owner_address>" \
  --data-urlencode "type=WALLET"

The response includes the Deposit Wallet nonce:

Response

{
  "address": "<relayer_address>",
  "nonce": "<wallet_nonce>"
}

Define the Session Key Authorization

Then, encode the authorizeSessionSigner call that the Deposit Wallet will execute:

function authorizeSessionSigner(address sessionSigner, uint256 validUntil)

Set validUntil to a future whole Unix timestamp in seconds, no more than 180 days from now. The following example uses Viem:

Example

import { encodeFunctionData, parseAbi } from "viem"

const sessionSignerAddress = "<session_signer_address>" as `0x${string}`
const sessionExpiryUnixSeconds = BigInt("<session_expiry_unix_seconds>")

const calldata = encodeFunctionData({
  abi: parseAbi([
    "function authorizeSessionSigner(address sessionSigner, uint256 validUntil)",
  ]),
  functionName: "authorizeSessionSigner",
  args: [sessionSignerAddress, sessionExpiryUnixSeconds],
})

Prepare the Owner Authorization

Then, prepare the EIP-712 typed data for the Deposit Wallet Owner to approve:

walletBatchTypedData

{
  "domain": {
    "name": "DepositWallet",
    "version": "1",
    "chainId": 137,
    "verifyingContract": "<deposit_wallet_address>"
  },
  "types": {
    "Call": [
      { "name": "target", "type": "address" },
      { "name": "value", "type": "uint256" },
      { "name": "data", "type": "bytes" }
    ],
    "Batch": [
      { "name": "wallet", "type": "address" },
      { "name": "nonce", "type": "uint256" },
      { "name": "deadline", "type": "uint256" },
      { "name": "calls", "type": "Call[]" }
    ]
  },
  "primaryType": "Batch",
  "message": {
    "wallet": "<deposit_wallet_address>",
    "nonce": "<wallet_nonce>",
    "deadline": "<batch_deadline_unix_seconds>",
    "calls": [
      {
        "target": "<deposit_wallet_address>",
        "value": "0",
        "data": "<calldata>"
      }
    ]
  }
}

Where:

<deposit_wallet_address> is the Deposit Wallet address.
<wallet_nonce> is the nonce returned when fetching the Deposit Wallet nonce.
<batch_deadline_unix_seconds> is a future whole Unix timestamp in seconds after which the signed authorization request can no longer be executed. The Relayer requires at least 10 seconds of remaining validity.
<calldata> is the encoded authorization call from the previous step.

Sign as the Deposit Wallet Owner

Then, prove that the Deposit Wallet Owner approves the authorization by signing the typed data. The following example uses Viem:

TypeScript with Viem

import { privateKeyToAccount } from "viem/accounts"

const depositWalletOwner = privateKeyToAccount(
  process.env.DEPOSIT_WALLET_OWNER_PRIVATE_KEY as `0x${string}`,
)

const signature = await depositWalletOwner.signTypedData(walletBatchTypedData)

Build the Authorization Body

Then, build the request body that authorizes the session signer:

{
  "walletAddress": "<deposit_wallet_address>",
  "sessionSignerAddress": "<session_signer_address>",
  "scopes": ["CLOB", "COMBOSRFQ"],
  "validUntil": "<session_expiry_unix_seconds>",
  "nonce": "<wallet_nonce>",
  "deadline": "<batch_deadline_unix_seconds>",
  "signature": "<signature>"
}

Where:

<deposit_wallet_address> is the Deposit Wallet address.
<session_signer_address> and <session_expiry_unix_seconds> are the signer and expiration encoded in <calldata>.
scopes contains one or more venue literals ("CLOB" or "COMBOSRFQ"), or ["ALL"] by itself.
<wallet_nonce> and <batch_deadline_unix_seconds> match the values in the signed typed data.
<signature> is the value returned in the previous step.

Create the Builder Signature

Then, authorize the request with the Builder keys:

authorization_body = <exact_serialized_authorization_body>
request_timestamp = <unix_seconds>
method = "POST"
request_path = "/v1/session-signers/authorizations"

message = request_timestamp + method + request_path + authorization_body
builder_signature = urlsafeBase64WithPadding(
  HMAC-SHA256(base64Decode(<builder_api_secret>), message)
)

Submit the Authorization

Then, submit the authorization request to the Relayer:

curl -X POST "https://relayer-v2.polymarket.com/v1/session-signers/authorizations" \
  -H "Content-Type: application/json" \
  -H "POLY_BUILDER_API_KEY: <builder_api_key>" \
  -H "POLY_BUILDER_TIMESTAMP: <request_timestamp>" \
  -H "POLY_BUILDER_PASSPHRASE: <builder_api_passphrase>" \
  -H "POLY_BUILDER_SIGNATURE: <builder_signature>" \
  -H "Idempotency-Key: <idempotency_key>" \
  -d '{
    "walletAddress": "<deposit_wallet_address>",
    "sessionSignerAddress": "<session_signer_address>",
    "scopes": ["CLOB", "COMBOSRFQ"],
    "validUntil": "<session_expiry_unix_seconds>",
    "nonce": "<wallet_nonce>",
    "deadline": "<batch_deadline_unix_seconds>",
    "signature": "<signature>"
  }'

Where:

<idempotency_key> uniquely identifies this authorization request. Reuse it when retrying the same request.
<request_timestamp> is the Unix timestamp in seconds used to create the Builder signature.
<builder_api_key> is your Builder API key.
<builder_api_passphrase> is the passphrase for your Builder API key.
<builder_signature> is the signature created in the previous step.

The response includes the Relayer transaction ID used to confirm the authorization:

Response

{
  "operationId": "<operation_id>",
  "status": "SUBMITTED",
  "transactionHash": "<transaction_hash>",
  "transactionId": "<transaction_id>"
}

Confirm the Relayer Transaction

Then, poll the transaction endpoint using the returned <transaction_id>:

curl "https://relayer-v2.polymarket.com/v1/account/transactions/<transaction_id>"

Continue until state is STATE_CONFIRMED. Treat STATE_FAILED and STATE_INVALID as terminal failures.

Response

{
  "transaction_id": "<transaction_id>",
  "transaction_hash": "<transaction_hash>",
  "state": "STATE_CONFIRMED",
  "error_msg": null
}

Poll for the Session Key

Finally, poll the session keys endpoint until it returns the session key with the expected scopes and expiration:

curl "https://clob.polymarket.com/v1/user/session-signers" \
  -H "POLY_ADDRESS: <signer_address>" \
  -H "POLY_API_KEY: <clob_api_key>" \
  -H "POLY_PASSPHRASE: <clob_api_passphrase>" \
  -H "POLY_SIGNATURE: <clob_l2_signature>" \
  -H "POLY_TIMESTAMP: <clob_request_timestamp>"

Using the Deposit Wallet Owner’s CLOB credentials from API Authentication, create a fresh timestamp for each request and calculate <clob_l2_signature> from the exact request path:

clob_request_timestamp = <unix_seconds>
method = "GET"
request_path = "/v1/user/session-signers"

message = clob_request_timestamp + method + request_path
clob_l2_signature = urlsafeBase64WithPadding(
  HMAC-SHA256(base64Decode(<clob_api_secret>), message)
)

Continue until signers contains the requested session signer with the expected scopes and expiration. The authorization is ready for use only after the session signer appears in the response.

Response

{
  "wallet": "<deposit_wallet_address>",
  "signers": [
    {
      "address": "<session_signer_address>",
      "scopes": ["CLOB", "COMBOSRFQ"],
      "valid_until": 1800000000 // <session_expiry_unix_seconds>
    }
  ]
}

Place an Order

This section shows how to place an order using a session key. See Place Orders for the complete order workflow.

TypeScript
Python
API

Create the Session Client

First, create a SecureClient for the Deposit Wallet with the session signer.

import { createSecureClient } from "@polymarket/client";
import { privateKey } from "@polymarket/client/viem";

const sessionPrivateKey = process.env.POLYMARKET_SESSION_PRIVATE_KEY!;
const depositWallet = process.env.POLYMARKET_DEPOSIT_WALLET!;

const sessionClient = await createSecureClient({
  signer: privateKey(sessionPrivateKey),
  wallet: depositWallet,
});

Place an Order

Then, use the sessionClient to submit a limit order.

import { OrderSide } from "@polymarket/client";

const response = await sessionClient.placeLimitOrder({
  tokenId: yesTokenId,
  side: OrderSide.BUY,
  price: "0.52",
  size: "10",
});

// response: OrderResponse

The order buys 10 shares at a price of 0.52 USD per share. See Place Orders for market constraints, order types, and response handling.

Create the Session Client

First, create an AsyncSecureClient for the Deposit Wallet with the session key.

from polymarket import AsyncSecureClient

session_client = await AsyncSecureClient.create(
    private_key=os.environ["POLYMARKET_SESSION_PRIVATE_KEY"],
    wallet=os.environ["POLYMARKET_DEPOSIT_WALLET"],
)

Place an Order

Then, use the session_client to submit a limit order.

response = await session_client.place_limit_order(
    token_id=yes_token_id,
    side="BUY",
    price="0.52",
    size="10",
)

# response: OrderResponse

The order buys 10 shares at a price of 0.52 USD per share. See Place Orders for market constraints, order types, and response handling.

Authenticate with the CLOB using the session key, then place an order. See API Authentication for the complete signing flow.

Create a CLOB L1 Signature

First, create a <clob_l1_signature> with the session key to prove control of the session signer.

ClobAuth

{
  "domain": {
    "name": "ClobAuthDomain",
    "version": "1",
    "chainId": 137
  },
  "types": {
    "ClobAuth": [
      { "name": "address", "type": "address" },
      { "name": "timestamp", "type": "string" },
      { "name": "nonce", "type": "uint256" },
      { "name": "message", "type": "string" }
    ]
  },
  "primaryType": "ClobAuth",
  "message": {
    "address": "<session_signer_address>",
    "timestamp": "<unix_seconds>",
    "nonce": "<nonce>",
    "message": "This message attests that I control the given wallet"
  }
}

Create or Derive CLOB Credentials

Then, create CLOB credentials for the session signer. If credentials already exist, derive them instead.

curl -X POST "https://clob.polymarket.com/auth/api-key" \
  -H "POLY_ADDRESS: <session_signer_address>" \
  -H "POLY_SIGNATURE: <clob_l1_signature>" \
  -H "POLY_TIMESTAMP: <unix_seconds>" \
  -H "POLY_NONCE: <nonce>"

curl "https://clob.polymarket.com/auth/derive-api-key" \
  -H "POLY_ADDRESS: <session_signer_address>" \
  -H "POLY_SIGNATURE: <clob_l1_signature>" \
  -H "POLY_TIMESTAMP: <unix_seconds>" \
  -H "POLY_NONCE: <nonce>"

<nonce> identifies the credential set. Use 0 unless you manage multiple credential sets.The response contains the credentials used to authenticate the order request:

{
  "apiKey": "<clob_api_key>",
  "secret": "<clob_api_secret>",
  "passphrase": "<clob_api_passphrase>"
}

Create the Order Typed Data

Then, create the order typed data for the Deposit Wallet using these values. This example uses a limit order.

Field	Value
`maker`	`<deposit_wallet_address>`
`signer`	`<deposit_wallet_address>`
`signatureType`	`3`

TypedDataSign Example

TypedDataSign

{
  "domain": {
    "name": "Polymarket CTF Exchange",
    "version": "2",
    "chainId": 137,
    "verifyingContract": "<exchange_address>"
  },
  "types": {
    "Order": [
      { "name": "salt", "type": "uint256" },
      { "name": "maker", "type": "address" },
      { "name": "signer", "type": "address" },
      { "name": "tokenId", "type": "uint256" },
      { "name": "makerAmount", "type": "uint256" },
      { "name": "takerAmount", "type": "uint256" },
      { "name": "side", "type": "uint8" },
      { "name": "signatureType", "type": "uint8" },
      { "name": "timestamp", "type": "uint256" },
      { "name": "metadata", "type": "bytes32" },
      { "name": "builder", "type": "bytes32" }
    ],
    "TypedDataSign": [
      { "name": "contents", "type": "Order" },
      { "name": "name", "type": "string" },
      { "name": "version", "type": "string" },
      { "name": "chainId", "type": "uint256" },
      { "name": "verifyingContract", "type": "address" },
      { "name": "salt", "type": "bytes32" }
    ]
  },
  "primaryType": "TypedDataSign",
  "message": {
    "contents": {
      "salt": "479249096354",
      "maker": "<deposit_wallet_address>",
      "signer": "<deposit_wallet_address>",
      "tokenId": "<yes_token_id>",
      "makerAmount": "5200000",
      "takerAmount": "10000000",
      "side": 0,
      "signatureType": 3,
      "timestamp": "<unix_milliseconds>",
      "metadata": "0x0000000000000000000000000000000000000000000000000000000000000000",
      "builder": "0x0000000000000000000000000000000000000000000000000000000000000000"
    },
    "name": "DepositWallet",
    "version": "1",
    "chainId": 137,
    "verifyingContract": "<deposit_wallet_address>",
    "salt": "0x0000000000000000000000000000000000000000000000000000000000000000"
  }
}

Sign the Order

Then, sign the order with the session key as shown in Sign the Order:

inner_signature = signTypedData(typed_data)
deposit_wallet_order_signature = wrapDepositWalletSignature(
  typed_data,
  inner_signature
)

Use the wrapDepositWalletSignature() helper from the linked example.

Add the Session Signer Envelope

Then, wrap <deposit_wallet_order_signature> with the session signer address:

signer_id = leftPadToBytes32(<session_signer_address>)
session_payload = abiEncode(
  ["bytes32", "bytes32", "bytes"],
  [signer_id, bytes32(0), <deposit_wallet_order_signature>]
)

session_wrapped_order_signature =
  session_payload +
  0x6492649264926492649264926492649264926492649264926492649264926492

Create the Order Request

Then, create the order request using <session_wrapped_order_signature>:

requestBody

{
  "deferExec": false,
  "order": {
    "builder": "0x0000000000000000000000000000000000000000000000000000000000000000",
    "expiration": "0",
    "maker": "<deposit_wallet_address>",
    "makerAmount": "5200000",
    "metadata": "0x0000000000000000000000000000000000000000000000000000000000000000",
    "salt": 479249096354,
    "side": "BUY",
    "signature": "<session_wrapped_order_signature>",
    "signatureType": 3,
    "signer": "<deposit_wallet_address>",
    "takerAmount": "10000000",
    "timestamp": "<unix_milliseconds>",
    "tokenId": "<yes_token_id>"
  },
  "orderType": "GTC",
  "owner": "<clob_api_key>"
}

Submit the Order

Finally, submit the order request:

curl -X POST "https://clob.polymarket.com/order" \
  -H "Content-Type: application/json" \
  -H "POLY_ADDRESS: <session_signer_address>" \
  -H "POLY_API_KEY: <clob_api_key>" \
  -H "POLY_PASSPHRASE: <clob_api_passphrase>" \
  -H "POLY_SIGNATURE: <clob_l2_signature>" \
  -H "POLY_TIMESTAMP: <clob_request_timestamp>" \
  --data '<request_body>'

<clob_l2_signature> authenticates the request. Generate it from the exact serialized request body and a fresh <clob_request_timestamp>:

message = <clob_request_timestamp> + "POST" + "/order" + <request_body>
clob_l2_signature = urlsafeBase64WithPadding(
  HMAC-SHA256(base64Decode(<clob_api_secret>), message)
)

Fetch Session Keys

List the active session keys for a Deposit Wallet to see which signers can currently act on its behalf.

TypeScript
Python
API

Call fetchSessionKeys() on the Deposit Wallet Owner’s SecureClient:

const sessionKeys = await secureClient.fetchSessionKeys();

// sessionKeys: SessionKey[]

Output: SessionKey[]

type SessionKey = {
  address: EvmAddress;
  scopes: SessionKeyScope[];
  validUntil: number;
};

[
  {
    "address": "<session_signer_address>",
    "scopes": ["CLOB", "COMBOSRFQ"],
    "validUntil": 1800000000
  }
]

Call fetch_session_keys() on the Deposit Wallet Owner’s AsyncSecureClient. The synchronous SecureClient provides the same method without await.

session_keys = await secure_client.fetch_session_keys()

# session_keys: tuple[AuthorizedSessionKey, ...]

Output: tuple[AuthorizedSessionKey, ...]

class AuthorizedSessionKey:
    address: EvmAddress
    scopes: tuple[SessionKeyScope, ...]
    valid_until: datetime

[
  {
    "address": "<session_signer_address>",
    "scopes": ["CLOB", "COMBOSRFQ"],
    "valid_until": "2027-01-15T08:00:00Z"
  }
]

Authenticate the Deposit Wallet Owner with the CLOB, then fetch the Deposit Wallet’s active session keys. See API Authentication for the complete signing flow.

Create a CLOB L1 Signature

First, create a <clob_l1_signature> with the Deposit Wallet Owner to prove control of <deposit_wallet_owner_address>.

ClobAuth

{
  "domain": {
    "name": "ClobAuthDomain",
    "version": "1",
    "chainId": 137
  },
  "types": {
    "ClobAuth": [
      { "name": "address", "type": "address" },
      { "name": "timestamp", "type": "string" },
      { "name": "nonce", "type": "uint256" },
      { "name": "message", "type": "string" }
    ]
  },
  "primaryType": "ClobAuth",
  "message": {
    "address": "<deposit_wallet_owner_address>",
    "timestamp": "<unix_seconds>",
    "nonce": 0,
    "message": "This message attests that I control the given wallet"
  }
}

Create or Derive CLOB Credentials

Then, create CLOB credentials for the Deposit Wallet Owner. If credentials already exist, derive them instead.

curl -X POST "https://clob.polymarket.com/auth/api-key" \
  -H "POLY_ADDRESS: <deposit_wallet_owner_address>" \
  -H "POLY_SIGNATURE: <clob_l1_signature>" \
  -H "POLY_TIMESTAMP: <unix_seconds>" \
  -H "POLY_NONCE: 0"

curl "https://clob.polymarket.com/auth/derive-api-key" \
  -H "POLY_ADDRESS: <deposit_wallet_owner_address>" \
  -H "POLY_SIGNATURE: <clob_l1_signature>" \
  -H "POLY_TIMESTAMP: <unix_seconds>" \
  -H "POLY_NONCE: 0"

The response contains the credentials used to authenticate the session keys request:

Response

{
  "apiKey": "<clob_api_key>",
  "secret": "<clob_api_secret>",
  "passphrase": "<clob_api_passphrase>"
}

Fetch the Session Keys

Finally, fetch the active session keys:

curl "https://clob.polymarket.com/v1/user/session-signers" \
  -H "POLY_ADDRESS: <deposit_wallet_owner_address>" \
  -H "POLY_API_KEY: <clob_api_key>" \
  -H "POLY_PASSPHRASE: <clob_api_passphrase>" \
  -H "POLY_SIGNATURE: <clob_l2_signature>" \
  -H "POLY_TIMESTAMP: <clob_request_timestamp>"

<clob_l2_signature> authenticates the request. Generate it from the request path and a fresh <clob_request_timestamp>:

message = <clob_request_timestamp> + "GET" + "/v1/user/session-signers"
clob_l2_signature = urlsafeBase64WithPadding(
  HMAC-SHA256(base64Decode(<clob_api_secret>), message)
)

The response identifies the Deposit Wallet and lists its active session keys:

Response

{
  "wallet": "<deposit_wallet_address>",
  "signers": [
    {
      "address": "<session_signer_address>",
      "scopes": ["CLOB", "COMBOSRFQ"],
      "valid_until": 1800000000 // <session_expiry_unix_seconds>
    }
  ]
}

signers contains only usable, unexpired, non-revoked authorizations. An empty array means the request succeeded but there are no active session keys.

Revoke a Session Key

Revoke a session key when an integration no longer needs access or its private key may have been exposed. Revocation prevents further trading by that key and cancels its open orders without affecting orders placed by other session keys. Revocation completes after the session key’s open orders are canceled and the on-chain transaction is confirmed, which may take several minutes.

TypeScript
Python
API

Call revokeSessionKey() on the Deposit Wallet Owner’s SecureClient with the session key’s public address:

const revocation = await secureClient.revokeSessionKey({
  address: sessionKeyAddress,
});

// revocation: RevokeSessionKeyResult

The method resolves after order cleanup and on-chain confirmation. The result contains the confirmed transaction.

Call revoke_session_key() on the Deposit Wallet Owner’s AsyncSecureClient with the session key’s public address. The synchronous SecureClient provides the same method without await.

transaction = await secure_client.revoke_session_key(
    address=session_key_address,
)

# transaction: TransactionOutcome

The method returns the confirmed transaction after order cleanup and on-chain confirmation.

Authorize the revocation as the Deposit Wallet Owner, then submit it with Builder authentication.

Fetch the Wallet Nonce

First, fetch the Deposit Wallet’s WALLET nonce by passing the Deposit Wallet Owner address.

curl -G "https://relayer-v2.polymarket.com/v1/account/transactions/params" \
  --data-urlencode "address=<deposit_wallet_owner_address>" \
  --data-urlencode "type=WALLET"

The response includes the Deposit Wallet nonce:

Response

{
  "address": "<relayer_address>",
  "nonce": "<wallet_nonce>"
}

Define the Session Key Revocation

Then, encode the revokeSessionSigner call that the Deposit Wallet will execute:

function revokeSessionSigner(address sessionSigner)

The following example uses Viem:

Example

import { encodeFunctionData, parseAbi } from "viem"

const sessionSignerAddress = "<session_signer_address>" as `0x${string}`

const calldata = encodeFunctionData({
  abi: parseAbi([
    "function revokeSessionSigner(address sessionSigner)",
  ]),
  functionName: "revokeSessionSigner",
  args: [sessionSignerAddress],
})

Prepare the Owner Authorization

Then, prepare the EIP-712 typed data for the Deposit Wallet Owner to approve:

Batch

{
  "domain": {
    "name": "DepositWallet",
    "version": "1",
    "chainId": 137,
    "verifyingContract": "<deposit_wallet_address>"
  },
  "types": {
    "Call": [
      { "name": "target", "type": "address" },
      { "name": "value", "type": "uint256" },
      { "name": "data", "type": "bytes" }
    ],
    "Batch": [
      { "name": "wallet", "type": "address" },
      { "name": "nonce", "type": "uint256" },
      { "name": "deadline", "type": "uint256" },
      { "name": "calls", "type": "Call[]" }
    ]
  },
  "primaryType": "Batch",
  "message": {
    "wallet": "<deposit_wallet_address>",
    "nonce": "<wallet_nonce>",
    "deadline": "<batch_deadline_unix_seconds>",
    "calls": [
      {
        "target": "<deposit_wallet_address>",
        "value": "0",
        "data": "<calldata>"
      }
    ]
  }
}

Where:

<deposit_wallet_address> is the Deposit Wallet address.
<wallet_nonce> is the nonce returned when fetching the Deposit Wallet nonce.
<batch_deadline_unix_seconds> is a future whole Unix timestamp in seconds after which the signed revocation request can no longer be executed. The Relayer requires at least 10 seconds of remaining validity.
<calldata> is the encoded revocation call from the previous step.

Sign as the Deposit Wallet Owner

Then, prove that the Deposit Wallet Owner approves the revocation by signing the typed data. The following example uses Viem:

TypeScript with Viem

import { privateKeyToAccount } from "viem/accounts"

const depositWalletOwner = privateKeyToAccount(
  process.env.DEPOSIT_WALLET_OWNER_PRIVATE_KEY as `0x${string}`,
)

const signature =
  await depositWalletOwner.signTypedData(walletBatchTypedData)

Build the Revocation Body

Then, build the request body that revokes the session signer:

{
  "walletAddress": "<deposit_wallet_address>",
  "sessionSignerAddress": "<session_signer_address>",
  "nonce": "<wallet_nonce>",
  "deadline": "<batch_deadline_unix_seconds>",
  "signature": "<signature>"
}

Where:

<session_signer_address> is the session key to revoke.
<wallet_nonce> and <batch_deadline_unix_seconds> match the values in the signed typed data.
<signature> is the value returned in the previous step.

Create the Builder Signature

Then, authorize the request with the Builder keys:

revocation_body = <exact_serialized_revocation_body>
request_timestamp = <unix_seconds>
method = "POST"
request_path = "/v1/session-signers/revocations"

message = request_timestamp + method + request_path + revocation_body
builder_signature = urlsafeBase64WithPadding(
  HMAC-SHA256(base64Decode(<builder_api_secret>), message)
)

Submit the Revocation

Then, submit the revocation request to the Relayer:

curl -X POST "https://relayer-v2.polymarket.com/v1/session-signers/revocations" \
  -H "Content-Type: application/json" \
  -H "POLY_BUILDER_API_KEY: <builder_api_key>" \
  -H "POLY_BUILDER_TIMESTAMP: <request_timestamp>" \
  -H "POLY_BUILDER_PASSPHRASE: <builder_api_passphrase>" \
  -H "POLY_BUILDER_SIGNATURE: <builder_signature>" \
  -H "Idempotency-Key: <idempotency_key>" \
  -d '{
    "walletAddress": "<deposit_wallet_address>",
    "sessionSignerAddress": "<session_signer_address>",
    "nonce": "<wallet_nonce>",
    "deadline": "<batch_deadline_unix_seconds>",
    "signature": "<signature>"
  }'

Where:

<idempotency_key> uniquely identifies this revocation request. Reuse it when retrying the same request.
<request_timestamp> is the Unix timestamp in seconds used to create the Builder signature.
<builder_api_key> is your Builder API key.
<builder_api_passphrase> is the passphrase for your Builder API key.
<builder_signature> is the signature created in the previous step.

The accepted response contains the identifiers used to track the revocation:

Response

{
  "fenced": true,
  "operationId": "<operation_id>",
  "status": "<revocation_status>",
  "transactionId": "<transaction_id>"
}

Confirm the Relayer Transaction

Finally, poll the transaction endpoint using the returned <transaction_id>:

curl "https://relayer-v2.polymarket.com/v1/account/transactions/<transaction_id>"

Continue until state is STATE_CONFIRMED. Treat STATE_FAILED and STATE_INVALID as terminal failures.

Response

{
  "transaction_id": "<transaction_id>",
  "transaction_hash": "<transaction_hash>",
  "state": "STATE_CONFIRMED",
  "error_msg": null
}

At that point, the session key’s open orders have been canceled and its on-chain revocation is confirmed.

Getting Started

Core Concepts

Market Data

Trading

Programs

Resources

Authorize a Session Key

Place an Order

Fetch Session Keys

Revoke a Session Key

​Authorize a Session Key

​Place an Order

​Fetch Session Keys

​Revoke a Session Key

Authorize a Session Key

Place an Order

Fetch Session Keys

Revoke a Session Key