# Data Archive {% hint style="warning" %} Support for Data Archive ended on March 1, 2025. Mempool Data from Nov 1, 2019, until then will remain accessible to the community. [Click here to learn more](https://discord.com/channels/542403978693050389/542406724427055135/1339585307867091025). {% endhint %} Support for Mempool Archive ended on March 1, 2025. Data from Nov 1, 2019, until then will remain accessible to the community. [Click here to learn more](https://discord.com/channels/542403978693050389/542406724427055135/1339585307867091025). Blocknative logs all mempool transactions from nodes in multiple geographical regions for the Ethereum mainnet blockchain. This includes information on when transactions entered, exited, replaced, finalized, or were rejected. Currently there are two datasets: * [Mempool Archive](/data-archive/mempool-archive.md) which contains the history of Ethereum mempool transactions since November 2019. \[No longer maintained but data from Nov 1, 2019, until March 1 remain accessible] * [Blob Archive](/data-archive/blob-archive.md) which allows you to enter a blob hash to receive the full blob data or the blob summary of any blob that has entered the Ethereum mempool. \[No longer maintained] The Data Archive is available for public benefit to enable researchers and community good projects. It may be freely used for non-commercial purposes. \ \ If you want to use this data for commercial use, contact us at . [Terms and Conditions](https://www.blocknative.com/blocknative-data-program-data-terms-and-conditions) - [License CC BY-NC-SA 4.0](https://creativecommons.org/licenses/by-nc-sa/4.0/) ## Join the community The Mempool Data Program is a group of researchers and community contributors actively engaged with the Blocknative mempool data archive.\ \ If you want to connect with peers, share insights about your research, receive guidance on utilizing the data effectively, and connect with the Blocknative data science and product teams, join the community [on telegram](https://t.me/+Rv63OCi1pnYyZDk0).\ \ Visit the [Research page](https://www.blocknative.com/research) to view content from the Mempool Data Program community (posts, papers, tweets, etc). ## Use Cases The Blocknative Data Archive can be used to research: * Historic gas trends * Censorship * Transaction inclusion * MEV * Private transactions * Bug fixes * Block sequences of interest * Trading strategies * Third-party strategies * Malicious activity * Probes for potential exploitation * Blobs ## Questions If you have any questions please join the [Blocknative Mempool Research Telegram channel](https://t.me/+Rv63OCi1pnYyZDk0) where our team can provide guidance. --- # 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://docs.blocknative.com/data-archive.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.