OpenAI is turning its coding agent, Codex, into an everything agent. So we built a Midpage plugin to enable legal research and drafting in Codex.
With the integration connected, Codex can search case law, open opinions, check treatment, and return source-linked answers. It’s the same idea behind our Claude, ChatGPT, and Perplexity integrations: legal research should be available where the work is already happening.
Legal research where the work is
Codex is most useful when a task has context and a record to work with: a draft, a folder of documents, a spreadsheet, a set of notes, or a multi-step workflow.
With Midpage, Codex can:
- Find cases by issue, fact pattern, or proposition
- Pull verified quotes from opinions
- Check treatment through Midpage's citator
- Cite-check a draft against the cases it relies on
- Turn research into memos, issue charts, timelines, and argument outlines
With Midpage connected, Codex runs actual searches against our case law, reads the opinions, and returns answers anchored to hyperlinked sources, so you can click through and check the cases behind the answer instead of just trusting them.
Same Midpage, more places to use it
The Codex integration uses the same Midpage data and tools behind our other integrations: federal and state case law, including unpublished opinions and federal district court opinions, plus citator treatment to help check whether authority is still good law.
Midpage now works on our standalone platform and in Claude, ChatGPT, Perplexity, and Codex.
Getting started
The Midpage Codex integration is available today.
To start: Open Codex, click on Plugins, then search for Midpage. Click install and connect your account.
If you are new to Midpage, start a free trial, turn on the integration, and ask Codex to research a question against real case law.
