# Legal ChatGPT Plugins

> Source: https://aiwiki.ai/wiki/legal_chatgpt_plugins
> Updated: 2026-06-27
> Categories: AI History, ChatGPT
> License: CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/)
> From AI Wiki (https://aiwiki.ai), the free encyclopedia of artificial intelligence. Reuse freely with attribution to "AI Wiki (aiwiki.ai)".

*See also: [ChatGPT Plugins](/wiki/chatgpt_plugins), [ChatGPT Plugin Categories](/wiki/chatgpt_plugin_categories) and [Legal](/wiki/legal)*

**Legal ChatGPT Plugins** were a category of third-party extensions for [ChatGPT](/wiki/chatgpt) that connected the assistant to legislative trackers, regulatory feeds, statutory codes, court opinion databases, and contract review utilities during the plugin beta operated by [OpenAI](/wiki/openai) between March 23, 2023 and April 9, 2024.[1][10] FiscalNote, the legislative and regulatory data firm, was the only legal, political, and regulatory data provider in the inaugural slate of twelve third-party launch partners, and it described itself as "the sole provider of legal, political, and regulatory data and information" among them.[1][2] The category later included case-law and single-jurisdiction code search plugins such as midpage caselaw and California Law, and it gave practitioners, compliance teams, paralegals, students, and policy analysts a way to ask ChatGPT questions that required current statutes, recent congressional activity, or the verbatim text of court decisions rather than relying on the model's training data.

The category sat alongside related groupings such as [finance](/wiki/finance_chatgpt_plugins) and overlapped heavily with the closely related [law](/wiki/law_chatgpt_plugins) listing in the plugin store. The platform was deprecated on April 9, 2024 in favor of [Custom GPTs](/wiki/custom_gpts) distributed through the [GPT Store](/wiki/gpt_store), which OpenAI announced at its first DevDay on November 6, 2023 and opened to ChatGPT Plus, Team, and Enterprise subscribers on January 10, 2024.[9][12] The native Actions mechanism inside Custom GPTs is the direct successor of the plugin manifest format that legal developers used in 2023 and early 2024. This page is a historical reference.

## What are legal ChatGPT plugins?

Legal plugins shared the design pattern that defined every plugin in the beta. A developer published an `ai-plugin.json` manifest paired with an OpenAPI specification that described the available endpoints. ChatGPT, running on [GPT-4](/wiki/gpt-4), then used [function calling](/wiki/function_calling) style routing to decide when to invoke a plugin, what parameters to pass, and how to summarize the response. For a legal plugin, that meant an attorney could type a natural language question such as "summarize the holding in this Ninth Circuit case" and the model would call the relevant API rather than guess from older information inside its training corpus.

The legal category occupied a narrow but high stakes niche in the broader plugin store. By late 2023 the store offered roughly one thousand plugins across more than sixty topical groupings, with travel, shopping, search, and productivity dominating by volume.[1] Legal plugins were comparatively few in number, but they tended to address professional users with subscription products and live primary source data, which made the category notable in coverage from law firm publications, bar associations, and legal technology trade press during 2023.[7][8]

Two design goals from OpenAI's plugin announcement were especially relevant here. The first was extending [large language models](/wiki/large_language_model) past the static training cutoff with current, source of truth content. The second was anchoring outputs in verifiable text.[1] Several legal plugins explicitly returned direct quotations from statutes or judicial opinions alongside summaries, addressing the hallucination risk that had drawn attention from federal courts in 2023.

## When did legal ChatGPT plugins launch and shut down?

| Date | Event |
|------|-------|
| March 23, 2023 | OpenAI announces ChatGPT plugins in alpha with twelve third-party launch partners (Expedia, FiscalNote, Instacart, KAYAK, Klarna, Milo, OpenTable, Shopify, Slack, Speak, Wolfram, and Zapier) plus first-party browsing and code interpreter plugins. FiscalNote is the only provider of legal, political, and regulatory data among them.[1][2] |
| May 12, 2023 | OpenAI announces that web browsing and plugins will become available to all ChatGPT Plus subscribers the following week.[3] |
| May 19, 2023 | The plugin store opens to all ChatGPT Plus customers, making the catalog of third-party plugins generally accessible.[3] |
| June 11, 2023 | The midpage caselaw plugin and the California Law plugin are added to the store, expanding the legal category beyond the FiscalNote launch entry.[5][6] |
| Late 2023 | The plugin store grows past one thousand plugins. Legal plugins remain a small but professionally focused subset of the catalog.[1] |
| November 6, 2023 | OpenAI introduces Custom GPTs at DevDay. New plugin submissions wind down in the following weeks.[9] |
| January 10, 2024 | OpenAI opens the GPT Store to ChatGPT Plus, Team, and Enterprise subscribers, reporting that users have already created more than 3 million custom GPTs.[12] |
| March 19, 2024 | New plugin installs and new plugin powered conversations are disabled.[10] |
| April 9, 2024 | Existing plugin conversations are shut down. The plugin platform is fully deprecated.[10] |

## Which plugins helped with legal research?

The table below covers plugins that were verifiably published in the ChatGPT plugin store during the 2023 to 2024 beta and that fell within the legal, regulatory, legislative, or statutory scopes. Each entry was cross checked against the developer's own announcement, the plugin store listing, or contemporaneous press coverage.

| Plugin | Developer | Function |
|--------|-----------|----------|
| FiscalNote | FiscalNote Holdings, Inc. | Real time legal, political, and regulatory data accessed through the Roll Call API for congressional news, a Biden remarks API for presidential statements, and a calendar API for the White House schedule.[4] |
| midpage caselaw | Midpage | Searches, summarizes, and quotes from United States case law. The plugin description states that it detects legal propositions, extracts verbatim relevant quotes, and assesses the veracity of propositions based on the full text of cited cases.[5] |
| California Law | Independent (law-plugin.herokuapp.com) | Searches the codified law of California and returns the relevant statutory section together with a direct quote from the law and a short summary of how it applies to the user's question.[6] |
| AskYourPDF | AskYourPDF | General PDF question answering used by attorneys to extract clauses, compare draft versions, and surface defined terms inside contracts, court filings, and regulatory documents.[7] |

A few additional plugins from outside the legal category were widely recommended in 2023 articles aimed at lawyers, including the Wolfram plugin for computational analysis and Zapier for connecting ChatGPT to existing legal practice management tools.[7] Those plugins are documented in their respective category pages and are not counted as legal plugins for the purposes of this article.

### How did the FiscalNote plugin work?

FiscalNote was the only legal and regulatory data provider in the inaugural cohort of twelve third party launch partners that OpenAI named on March 23, 2023.[1][2] The Washington based company described itself in its own announcement as "the sole provider of legal, political, and regulatory data and information" among the trusted partners chosen for the alpha.[2] FiscalNote chairman, chief executive, and co founder Tim Hwang said the company had been "an early adopter and pioneer of AI" and had spent a decade aggregating and training models in the legal and political domain.[2]

The FiscalNote plugin drew on the company's portfolio of brands. CQ and Roll Call, both acquired by FiscalNote in earlier years, supplied congressional reporting and tracking. The plugin manifest exposed three named endpoints during the beta: a Roll Call API for news articles related to Congressional people and proceedings, a Biden remarks API for searching statements made by the sitting president, and a calendar API for the official White House calendar.[4] Together these gave ChatGPT the ability to answer questions about pending legislation, official remarks, and federal scheduling that fell well outside its training data window.

Lawyers, lobbyists, in house compliance staff, and policy analysts could use the plugin to ask conversational questions like "what did the president say about semiconductor export controls last week" or "what is the status of HR 1 in the House" and receive a summary built from FiscalNote sources rather than from the model's parametric memory. Other parts of the FiscalNote portfolio, including Oxford Analytica geopolitical briefs and the VoterVoice advocacy platform, were not surfaced through the plugin manifest itself.

### How did the midpage caselaw plugin work?

The midpage caselaw plugin was added to the ChatGPT plugin store on June 11, 2023.[5] It was published by Midpage, a New York and Berlin based legal technology startup focused on making language models useful and transparent for lawyers.[11] The plugin manifest was hosted at midpage-plugin.onrender.com and described the integration as a tool that lets ChatGPT interact with United States case law.[5]

Midpage's plugin was unusual in the legal category because it was explicit about hallucination control. Its public description stated that for United States case law the plugin "detects legal propositions, extracts verbatim relevant quotes, and assesses veracity of propositions based exclusively on the full text of the cited case."[5] When an attorney asked ChatGPT to confirm whether a stated rule actually came from a cited decision, the plugin retrieved the underlying opinion and graded the assertion against the source rather than allowing the chat model to answer from training data alone. Where a case was too long to return in full, the plugin could instead surface one to three verbatim quotes that supported or undermined the stated proposition.[5] Lawyers could paste a passage from a draft motion and ask ChatGPT to verify each citation. Midpage subsequently expanded the same product through a Custom GPT after the plugin platform was retired.

### How did the California Law plugin work?

The California Law plugin was added on June 11, 2023.[6] It was hosted at law-plugin.herokuapp.com and was listed in the store's legal and news categories. Its manifest described it as a tool "used for searching California laws," and instructed the model to use the plugin for "ALL questions about California law," including topics such as tenants rights, criminal cases, and tax issues.[6]

Responses returned a direct quote from the relevant statutory section together with a short summary describing how the cited section applied to the user's question. The plugin therefore functioned as a primary source citation tool for the California Codes rather than as a generative drafting aid. Its public listing carried the standard disclaimer that the information returned was "not legal advice and is not a substitute for the advice of a licensed attorney," a disclaimer that became common among legal plugins as bar associations warned members about the risks of unsupervised consumer chatbot use in 2023.[6] The plugin illustrated how independent developers could publish a useful single jurisdiction code search tool by wrapping public statutory text with a thin OpenAPI interface.

### What did AskYourPDF do for lawyers?

AskYourPDF was published in the ChatGPT plugin store in May 2023 and quickly became one of the most widely used productivity plugins among lawyers, paralegals, and compliance staff. Although it was not formally classified as a legal plugin in the store, its role in legal workflows was broad enough that nearly every contemporaneous law firm guide to ChatGPT plugins recommended it.[7]

The plugin let a user upload a PDF, then ask ChatGPT questions about its contents through ordinary conversational prompts. Lawyers used AskYourPDF to extract clauses from contracts, summarize court filings, compare draft versions of agreements, and locate defined terms inside regulatory documents. Because the plugin returned page references, attorneys could also use it to cite check long memoranda and verify where in a document a particular passage appeared.

## How did the legal category overlap with other categories?

The ChatGPT plugin store categorized listings by topic, but the boundaries between categories were imperfect. The legal category overlapped with several adjacent categories during the beta.

| Adjacent category | Overlap |
|-------------------|---------|
| News | FiscalNote and California Law both appeared in news categorizations because they returned current legislative or regulatory items. |
| Government | Federal and state government data plugins frequently served legal use cases. |
| Finance | Regulatory feeds were classified under both legal and finance, especially when the underlying data covered securities rules, tax filings, or banking regulation. |
| Productivity | Tools such as AskYourPDF were typically filed under productivity but performed legal research work in practice. |

This page focuses on plugins whose primary purpose involved law, regulation, or legislative tracking. The closely related entry [Law ChatGPT Plugins](/wiki/law_chatgpt_plugins) covers the primary-source side of the same category (statutes, codes, and case opinions) for the same historical period, while this article emphasizes the practitioner-services and regulatory-tracking framing. The two listings share several plugins, including FiscalNote, midpage caselaw, and California Law, and some directories used the terms interchangeably during the beta.

## How did lawyers and bar associations react to legal plugins?

Law firm and bar association coverage during the plugin era treated legal ChatGPT plugins with a mix of enthusiasm and caution. Practitioner guides published in May and June 2023, including commentary in the Minnesota Lawyer and the New York Daily Record, recommended a small set of plugins as starting points for attorneys: FiscalNote for legislative and regulatory tracking, AskYourPDF for document review, Wolfram for computational tasks, Zapier for workflow integration, and KeyMate.AI Search and Web Pilot for general live retrieval.[7][8]

The enthusiasm was tempered by 2023 incidents in United States federal courts in which attorneys submitted ChatGPT generated briefs that contained fabricated citations to nonexistent decisions. Plugins that explicitly anchored their output in primary sources, such as midpage caselaw or California Law, were viewed as partial mitigations of the hallucination problem because they pulled directly from official statutory text or court opinions rather than allowing the model to invent supporting authority.[5][6] None of the plugins in this category claimed to provide legal advice; each carried the standard disclaimer that the information returned was for informational purposes only.

## What replaced ChatGPT plugins?

OpenAI announced Custom GPTs and the GPT Store at DevDay on November 6, 2023.[9] Plugins were not removed immediately, but the company signaled that the manifest plus OpenAPI design would be replaced by Actions inside individual GPTs. The GPT Store opened to ChatGPT Plus, Team, and Enterprise subscribers on January 10, 2024, by which point users had created more than 3 million custom GPTs.[12] The plugin store stopped accepting new submissions soon afterward. New plugin installs and new plugin powered conversations were disabled on March 19, 2024, and the platform was fully deprecated on April 9, 2024.[10]

Legal developers responded in different ways. Midpage and FiscalNote both maintained legal research and policy intelligence offerings inside the GPT Store after the plugin platform closed, often pointing at the same backend services through the new Actions mechanism. Independent maintainers of smaller plugins, such as the California Law tool, did not always migrate. As a result, the plugin category snapshot from late 2023 represents the high water mark of legal plugin breadth.

Several patterns observed in legal plugins, including verbatim source quotation, jurisdiction limited search, and explicit hallucination disclaimers, became standard features of legal Custom GPTs and the legal vertical inside the [GPT Store](/wiki/gpt_store). The plugin manifest format itself was retired, but the user expectation that ChatGPT could fetch primary legal sources rather than rely on training data, refined through [prompt engineering](/wiki/prompt_engineering) practices in the beta, carried forward.

## See also

- [ChatGPT Plugins](/wiki/chatgpt_plugins)
- [ChatGPT Plugin Categories](/wiki/chatgpt_plugin_categories)
- [Law ChatGPT Plugins](/wiki/law_chatgpt_plugins)
- [Finance ChatGPT Plugins](/wiki/finance_chatgpt_plugins)
- [Custom GPTs](/wiki/custom_gpts)
- [GPT Store](/wiki/gpt_store)
- [GPT-4](/wiki/gpt-4)
- [Large Language Model](/wiki/large_language_model)
- [Prompt Engineering](/wiki/prompt_engineering)

## References

1. OpenAI, "ChatGPT plugins," announcement, March 23, 2023, naming the twelve third-party launch partners alongside first-party browsing and code interpreter plugins.
2. FiscalNote Holdings, Inc., "FiscalNote Selected by OpenAI for Collaboration As Inaugural Launch Partner for OpenAI's ChatGPT Plug-in," press release, March 23, 2023, distributed via Business Wire, including the "sole provider of legal, political, and regulatory data and information" description and the Tim Hwang quotation.
3. OpenAI, "ChatGPT release notes," entries for May 12, 2023 and May 19, 2023, announcing the broad rollout of plugins to ChatGPT Plus subscribers.
4. Plugin store listing for FiscalNote, describing the Roll Call API, Biden remarks API, and White House calendar API endpoints.
5. Plugin store listing for midpage caselaw, hosted at midpage-plugin.onrender.com, with the description of legal proposition detection and verbatim quotation from cited cases; added June 11, 2023.
6. Plugin store listing for California Law, hosted at law-plugin.herokuapp.com, including the disclaimer that the plugin's output is "not legal advice and is not a substitute for the advice of a licensed attorney"; added June 11, 2023.
7. Nicole Black, "Unlocking the potential of ChatGPT plugins in your law practice," New York Daily Record, June 2, 2023, listing FiscalNote, AskYourPDF, Wolfram, Zapier, and other plugins useful for attorneys.
8. Nicole Black, "Commentary: Unlocking potential of ChatGPT plugins in your practice," Minnesota Lawyer, June 9, 2023.
9. OpenAI, "Introducing GPTs," announcement at DevDay, November 6, 2023, signaling the transition from plugins to Custom GPTs.
10. OpenAI Help Center, "Winding down the ChatGPT plugins beta," with March 19, 2024 and April 9, 2024 deprecation milestones.
11. Midpage company materials describing the company as a New York and Berlin based legal technology firm focused on transparency and reliability of language model output for lawyers.
12. OpenAI, "Introducing the GPT Store," January 10, 2024, opening the store to ChatGPT Plus, Team, and Enterprise subscribers and reporting more than 3 million custom GPTs created.