Are Read-Only Crypto Exchange API Keys Safe?
Read-only exchange API keys reduce trading and withdrawal risk, but they still expose portfolio data and must be stored, restricted, and rotated securely.
Read-only API keys are safer than keys that can trade or withdraw, but they are not harmless. A correctly restricted key should let a portfolio tracker retrieve account data without allowing it to place orders or move funds. If that key leaks, the attacker may still see balances, positions, order history, and other private account information.
So the answer is conditional. Read-only keys can be appropriate for portfolio monitoring when permissions are restricted, the credentials are stored securely, and the user can revoke them quickly.
They should still be treated as passwords.
What “read-only” actually means
An exchange API key is a credential used by software to make authenticated requests to an account. Most exchanges divide access into separate permissions rather than giving every key the same powers.
Official API documentation from Binance separates private account data from trading endpoints. Its USER_DATA endpoints include private information such as order status and trading history, while TRADE endpoints can place and cancel orders. The documentation says a new key cannot trade by default until trading is enabled in API Management.
OKX documents three permission categories: Read, Trade, and Withdraw. Read access covers account information such as bills and order history; the other two permissions allow orders, certain transfers, settings changes, or withdrawals.
A read-only key should therefore be limited to the account-data permissions needed by the application. It should not include trading, internal-transfer, or withdrawal scopes.
The exact labels vary between exchanges. The principle does not.
What a leaked read-only key cannot normally do
If permissions are configured correctly and the exchange enforces them as documented, a read-only credential should not be able to:
place, modify, or cancel orders.
open or close futures positions.
transfer funds between accounts.
add withdrawal addresses.
withdraw assets.
That sharply reduces the financial damage possible from a credential leak. A portfolio tracker does not need execution access just to retrieve balances, positions, fills, funding payments, and transfer records.
Permission boundaries matter more than the name given to the key. A key labeled “portfolio tracker” is not safe if trading or withdrawal access was enabled during setup.
What a leaked read-only key may expose
Read-only does not mean anonymous.
Depending on the exchange and enabled scope, the credential may reveal:
account balances and asset allocation.
open positions, leverage, and liquidation data.
open and historical orders.
trade fills and funding payments.
deposits, withdrawals, and transfer history.
subaccount or account-structure information.
This data cannot directly sign an on-chain transaction or authorize a withdrawal if the key is genuinely read-only. It can still be valuable to an attacker.
A detailed portfolio reveals how much capital the user controls, which venues they use, and where their positions are vulnerable. That information can support targeted phishing, impersonation, extortion, or social-engineering attempts.
The API secret is therefore still a secret. Binance’s own documentation says both the API key and secret key are sensitive and should never be shared. OKX likewise tells users to keep the API key, secret, and passphrase safe.
Are read-only API keys safe for crypto tracking?
They are a reasonable security trade-off when the application genuinely needs private account data. They are not as safe as providing no credentials at all.
The risk depends on four layers:
Exchange permissions. The key must be restricted to read access.
Network restrictions. An IP allowlist can limit where the key is accepted.
Application security. The tracker must protect the secret during submission, storage, and use.
User operations. Old and unused keys need to be reviewed, rotated, and revoked.
Weakness in any layer can undermine the others. Strong encryption at the portfolio tracker does not fix a key that was created with withdrawal permission. An IP allowlist does not help if the approved server itself is compromised.
Read-only access limits impact. It does not eliminate the need for credential security.
How to configure a read-only Binance API key
A portfolio-monitoring key should have only the permission needed to read account data. Do not enable spot trading, margin trading, futures trading, transfers, or withdrawals for a tracker that does not execute trades.
Binance’s Spot API documentation distinguishes USER_DATA from TRADE and says API keys can be configured for specific secure endpoint types. That separation allows monitoring software to read private account information without receiving order-placement access.
After creating the key, verify its permissions in the exchange interface rather than relying on the application’s setup instructions. Check again after editing the key, changing an account type, or reconnecting the integration.
Use a separate key for each service. If two applications share one key, it becomes harder to identify which one leaked it and impossible to revoke access for only one service without disrupting the other.
If the exchange and tracker support IP restrictions, bind the key to the tracker’s documented addresses. OKX explicitly recommends linking API keys to IP addresses as a security measure. Do not guess an IP range or use one supplied through an unofficial support message.
How a crypto portfolio tracker should keep an API key safe
The tracker needs the secret to authenticate private API requests, so marketing language such as “bank-grade security” is not enough. The storage and access model matters.
A credible service should be able to explain:
whether trading and withdrawal permissions are rejected or merely discouraged.
how secrets are encrypted at rest.
how encryption keys are managed.
which systems or employees can access decrypted credentials.
whether secrets can appear in logs, analytics, or support tools.
how keys are deleted when an account is disconnected.
what happens after a suspected breach.
OWASP treats API keys as secrets and recommends centralized storage, controlled access, auditing, rotation, revocation, and protection against plaintext logging.
Encryption at rest is useful, but it is only one control. The application has to decrypt or otherwise use the credential when contacting the exchange. Access to that operation should be limited to the systems that need it, with logs designed not to capture the raw secret.
Please never send API keys or other credentials.
That includes email, chat, screenshots, shared documents, issue trackers, and unofficial support forms. A legitimate setup flow should collect the credential through the product’s secured connection interface, not through a conversation with a support agent.
Warning signs when choosing a tracker
Do not connect an account if the service asks for withdrawal permission. A portfolio dashboard has no need to move assets.
Trading permission also deserves scrutiny. Some products combine tracking and execution, so the permission may match their design. That creates a different risk profile from a read-only tracker. Users should not enable it accidentally because a setup guide says to select every checkbox.
Other warning signs include:
asking users to paste secrets into support chat;
no clear explanation of required permissions;
storing credentials in browser local storage without a documented reason;
no way to delete or rotate a connection;
recommending one key for several third-party services;
asking users to disable exchange security controls;
refusing to explain how credentials are encrypted and accessed.
A polished dashboard does not compensate for vague credential handling.
IP restrictions help, but have limits
An IP allowlist tells the exchange to accept the API key only from specified network addresses. A stolen key used from an unapproved address should then fail authentication.
This can materially reduce exposure, and OKX recommends binding keys to IP addresses. It works best when the tracker publishes stable outbound IPs and has a process for announcing changes.
The control is not universal. Some services use dynamic infrastructure, and some exchange integrations may not support the same restriction. An allowlist also cannot stop abuse from a compromised server whose IP is already approved.
Use it as another barrier, not as a replacement for read-only permissions or secure storage.
Key rotation and incident response
API keys should not remain active forever simply because they still work.
OWASP recommends that secrets exist only as long as necessary, remain revocable, and have a rotation process. For an individual trader, that means reviewing connected applications periodically and deleting keys that are no longer used.
Rotate a key when:
the secret may have appeared in a message, screenshot, log, or repository;
a device used during setup was compromised;
the portfolio service reports a security incident;
the service changes its infrastructure or required permissions;
a team member who had access leaves;
the key is old and its purpose is unclear.
If exposure is suspected, revoke first and investigate second. Creating a replacement is easier than recovering funds or containing a targeted attack.
Binance advises users who notice unusual account activity to revoke API keys and contact support.
How ArbLens handles exchange connections
ArbLens uses read-only exchange API keys to retrieve portfolio data from supported venues. It does not require trading or withdrawal permissions and cannot place, modify, or cancel orders.
The connected data is used to consolidate free and locked balances, open positions, paired arbitrage legs, PnL, funding payments, fills, and transfer history. ArbLens states that API credentials are encrypted using KMS-backed storage.
Read-only permissions reduce the impact of a credential compromise, while managed encryption protects stored secrets. Neither makes the key public or disposable. Users should still create a dedicated key, verify its permissions at the exchange, apply IP restrictions where supported, and revoke the connection when it is no longer needed.
A short security checklist
Before connecting any portfolio tracker:
verify the website domain and avoid links sent by unsolicited accounts;
create a new key used only for that tracker;
enable read access and nothing else;
confirm that trading, transfers, and withdrawals are disabled;
add the provider’s documented IP addresses where supported;
never save the secret in an unencrypted note or screenshot;
check the connection against the exchange’s API-management page;
revoke keys you no longer recognize or use.
Repeat the permission check after any configuration change. It takes less time than investigating an account compromise.
Safer does not mean risk-free
Read-only API keys are designed to separate account visibility from account control. That makes them suitable for portfolio tracking when the exchange and application enforce the restriction correctly.
The remaining risk is mostly data exposure and credential handling. A leaked read-only key can reveal a detailed financial and trading profile even if it cannot move funds.
Use the least privilege available, restrict the network when possible, choose a tracker with a clear secrets-management model, and keep revocation simple. That is what makes a read-only integration reasonably safe.