Show HN: Chrome extension that blocks API keys from being pasted into AI tools

Description and use

**Brief Summary (2‑3 sentences)**
The “Show HN: Chrome extension that blocks API keys from being pasted into AI tools” is an open‑source browser add‑on that intercepts clipboard paste events and prevents accidental leakage of secret API keys when users interact with web‑based AI services. By warning or blocking the paste, it helps developers and teams prototype AI features—such as RAG or autonomous agents—without risking credential exposure.

**Value**

• **Security‑first workflow:** Stops a common human error that can instantly compromise cloud‑based AI services, saving time and cost associated with key rotation and breach remediation.
• **Low‑friction integration:** Works out‑of‑the‑box in Chrome, requiring only the extension install; no code changes are needed in existing AI prototypes or internal tools.
• **Supports rapid prototyping:** Teams can experiment with LLM APIs, RAG pipelines, or agent frameworks while keeping their secrets safe, accelerating the “build‑and‑test” cycle.

**Practical Adoption Path**

1. **Evaluation:** Clone the repo, run the extension locally, and test it against your typical AI web‑apps (e.g., ChatGPT, Claude, custom UI). Verify that the warning/block behavior aligns with your security policy.
2. **Policy configuration:** If needed, adjust the whitelist/blacklist patterns in the source code or via the extension’s options page to accommodate internal domains or specific key formats.
3. **Pilot rollout:** Deploy the extension to a small group of developers or a sandbox environment; collect feedback on false positives/negatives and update the detection rules.
4. **Organization‑wide install:** Publish the packaged extension to your internal Chrome Web Store or use enterprise policy management (e.g., Google Admin console) to force‑install it for all relevant users.
5. **Ongoing maintenance:** Monitor the upstream repository for updates, security patches, and compatibility with new Chrome releases; periodically review the detection heuristics as your API key formats evolve.

**Production Readiness**

• **Maturity:** Medium. The extension is functional and updated as of 2026‑05‑13, but metadata is sparse (few topics, limited documentation, and unknown release cadence).
• **Risks:** Limited quality signals mean you should verify the license, test for stability across Chrome versions, and assess the maintainers’ activity before relying on it in critical environments.
• **Recommended use:** Ideal for internal prototypes, sandbox environments, or as a safety net during early‑stage development. For production‑grade deployments, supplement the extension with additional secret‑management controls (e.g., environment variable vaults, server‑side key validation) and establish a process for monitoring upstream changes.

Use in a workflow

Show HN: Chrome extension that blocks API keys from being pasted into AI tools helps add AI capability without starting from a blank model stack.

• prototype AI features
• build RAG or agent workflows
• evaluate model tooling

Limitations and review notes

Medium: useful for prototypes or internal workflows, with dependency and maintenance checks before production.