> For the complete documentation index, see [llms.txt](https://docs.frequencychain.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.frequencychain.org/15.-apis-and-sdk-integration/15.8-api-security-considerations.md).

# 15.8 API Security Considerations

When integrating APIs, security must be carefully managed.

Developers should ensure that private keys are never exposed in client-side code, sensitive operations are handled in secure backend environments, API endpoints are protected against misuse and rate limiting and monitoring are implemented.

**Observability and Debugging**

FreCx interactions can be monitored through application logs, RPC responses and blockchain explorers.

Developers can verify transaction status, contract interactions and event emissions.

The API and SDK layer of FreCx provides developers with flexible and powerful tools to interact with the blockchain. By combining raw RPC access with higher-level abstractions such as ethers.js and custom SDKs, developers can build scalable, maintainable, and secure applications that leverage the full capabilities of the FreCx ecosystem.


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