A Leaked Aggregator Key Isn't a Vendor Ban: Mapping the Real Blast Radius Before You Panic

When an aggregator API key leaks, the first instinct is often to fear a vendor ban. But an aggregator key is not the same as a provider key. Understanding what it can and cannot do helps you respond proportionally and focus on the real blast radius.

What a leaked aggregator key can do

An aggregator key authenticates requests to the aggregator's API, which then routes them to various model providers. With a leaked key, an attacker can:

• Make API calls to any model available through the aggregator, consuming your account balance.
• Incur charges for usage, which you are responsible for paying.
• Potentially access usage logs or account information if the key has broader permissions (depends on the aggregator's key scoping).

However, the key does not grant direct access to the underlying provider accounts. The aggregator acts as a middleman, so the attacker never sees your provider credentials or contracts.

What a leaked aggregator key cannot do

Contrary to common fear, a leaked aggregator key typically cannot:

• Get your account banned by model vendors like OpenAI, Anthropic, or others. Vendors ban accounts for policy violations (e.g., abusive content), not because an aggregator key leaked. The aggregator manages its own relationship with vendors.
• Expose your payment methods or personal data beyond what the aggregator stores. Most aggregators do not store full payment details; they use top-ups like USDC on Base, which are not reversible but also not directly linked to your identity if you use no-KYC methods.
• Allow the attacker to impersonate you to vendors directly. The key only works within the aggregator's system.

How it differs from a leaked provider key

A leaked provider key (e.g., an OpenAI API key) is more dangerous because it gives direct access to the provider's API under your account. That can lead to:

• Immediate charges on your provider bill.
• Potential account suspension if the attacker violates the provider's usage policies.
• Loss of access to the provider's services.

In contrast, an aggregator key leak is contained to the aggregator's platform. The aggregator may have its own terms of service, but the blast radius is limited to your balance and the aggregator account.

What to check in usage logs first

Before panicking, review your usage logs to assess the actual impact:

• Unusual activity patterns: Look for spikes in requests, unfamiliar models, or requests from unexpected IP addresses or regions.
• Timing: Check if the anomalous usage aligns with when the key might have been exposed.
• Volume and cost: Estimate the financial impact by reviewing token usage and associated charges.
• Model access: See if the attacker tried to access models you don't normally use.

If you find no suspicious activity, the key may not have been used. Still, rotate it as a precaution.

Immediate steps to take

1. Revoke the leaked key immediately through your aggregator dashboard.
2. Generate a new key and update your applications.
3. Review and adjust spending limits if the aggregator supports them.
4. Monitor usage closely for the next few days.
5. Contact support if you suspect fraudulent charges; some aggregators may offer assistance.

Preventing future leaks

• Store keys in environment variables or secret managers, never in code repositories.
• Use separate keys for different applications or environments.
• Rotate keys periodically.
• Enable any available key restrictions (e.g., IP allowlisting, model restrictions) if your aggregator provides them.

Remember, a leaked aggregator key is a security incident, but it's not a vendor ban sentence. Act quickly, review the logs, and rotate the key to minimize impact.