# The zkSync Stamp {% hint style="info" %} As of December 2024, the zkSync Stamp has been merged with the Ethereum Stamp. The Ethereum Stamp now reviews your transaction history across not only ETH L1, but also zkSync, Arbitrum, Optimism, and Polygon. If you have the zkSync Stamp still, it will retire after it [expires](/passport-knowledge-base/common-questions/why-have-my-stamps-expired.md) from your Passport. {% endhint %} --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://support.passport.xyz/passport-knowledge-base/stamps/how-do-i-add-passport-stamps/zksync-stamp.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.