One Key Shared by a Team Got Banned: How to Contain the Blast Radius

Why Sharing a Single Key Is Risky

When multiple team members share one API key, any violation of the provider's terms—such as exceeding rate limits, using the key from multiple regions, or accidental misuse—can lead to a ban. That ban stops every application and user relying on that key, creating a single point of failure.

Design for Isolation

To limit the impact of a ban, treat each user or service as a separate entity with its own credentials and limits.

• Separate keys per user or per service: Issue a unique API key for each team member, application, or environment. This way, if one key is banned, others remain unaffected.
• Use a gateway or proxy: Route API calls through a gateway that maps internal identities to external keys. This adds a layer of control and allows rotating keys without changing client code.
• Logical partitioning: Even if you use a single provider account, create logical partitions (e.g., projects) with distinct keys and quotas. This prevents cross‑contamination of violations.

Implement Per‑User Key Management

On our platform, you can top up with USDC on Base without KYC and call many models (Claude, GPT, DeepSeek, Qwen, GLM, Kimi) with one API key. However, for team use, we recommend issuing separate API keys to each member. This way, if one key is compromised or banned, others continue to work.

• Onboarding: When a new team member joins, create a new API key for them rather than sharing an existing one.
• Offboarding: When someone leaves, revoke their key immediately. This prevents unauthorized use and reduces the risk of a ban due to their actions.
• Monitoring: Track usage per key to detect anomalies early. Unusual patterns might indicate a compromised key or a violation that could lead to a ban.

Handling a Ban Gracefully

If a key is banned, have a plan to recover quickly:

• Fallback keys: Keep backup keys ready to switch to, but ensure they are not used for the same potentially violating activity.
• Automated rotation: Implement automatic key rotation on ban detection. Your gateway can detect authentication failures and switch to a backup key.
• User notification: Inform the affected user and provide a way for them to request a new key or appeal the ban.

Benefits of Containment

• Reduced downtime: A ban on one key doesn't take down the entire team.
• Better security: Individual keys limit the scope of a compromised credential.
• Easier compliance: You can enforce different policies for different users or applications.

Conclusion

Sharing a single API key across a team is convenient but risky. By designing for isolation, managing keys per user, and preparing for bans, you can contain the blast radius and keep your operations running smoothly. Remember, our platform charges users official price × 1.3, and key contributors are credited official price × 1.1 (premium × 1.2) in USDC—so using separate keys also helps track contributions accurately.