You can access the CourtListener Opinion Search v2 programmatically from your own applications by using the Apify API. You can also choose the language preference from below. To use the Apify API, you’ll need an Apify account and your API token, found in API & Integrations in Apify Console.

Python

JavaScript

CLI

OpenAPI

HTTP

MCP

1import { ApifyClient } from 'apify-client';
2
3// Initialize the ApifyClient with your Apify API token
4// Replace the '<YOUR_API_TOKEN>' with your token
5const client = new ApifyClient({
6    token: '<YOUR_API_TOKEN>',
7});
8
9// Prepare Actor input
10const input = {
11    "buyerQuery": "copyright",
12    "sourceMode": "startUrls",
13    "outputMode": "buyer-ready-records",
14    "startUrls": [
15        {
16            "url": "https://www.courtlistener.com/api/rest/v4/search/"
17        }
18    ],
19    "maxItems": 1,
20    "perSourceLimit": 1,
21    "maxTotalChargeUsd": 5,
22    "overallTimeoutSecs": 300,
23    "requestTimeoutSecs": 20,
24    "maxRequestRetries": 1,
25    "sinceLastRun": false,
26    "deltaMode": false
27};
28
29// Run the Actor and wait for it to finish
30const run = await client.actor("zentrafoundry/courtlistener-litigation-intelligence-v2").call(input);
31
32// Fetch and print Actor results from the run's dataset (if any)
33console.log('Results from dataset');
34console.log(`💾 Check your data here: https://console.apify.com/storage/datasets/${run.defaultDatasetId}`);
35const { items } = await client.dataset(run.defaultDatasetId).listItems();
36items.forEach((item) => {
37    console.dir(item);
38});
39
40// 📚 Want to learn more 📖? Go to → https://docs.apify.com/api/client/js/docs

CourtListener v2 patent infringement opinions API in JavaScript

The Apify API client for JavaScript is the official library that allows you to use CourtListener Opinion Search v2 API in JavaScript or TypeScript, providing convenience functions and automatic retries on errors.

Install the apify-client

$npm install apify-client

Other API clients include:

CourtListener Opinion Search v2 API in Python

CourtListener Opinion Search v2 API through CLI

CourtListener Opinion Search v2 OpenAPI definition

CourtListener Opinion Search v2 API

CourtListener Scraper - Case Law & Legal Opinions API

pink_comic/courtlistener-legal-opinions

Search CourtListener case law and US legal opinions by keyword, court, date, citation, docket number, and publication status. Export source-linked case metadata, judges, citations, opinion types, snippets, and document URLs for legal research, monitoring, compliance, and RAG.

Ava Torres

CourtListener Scraper - Case Law, PACER Dockets & Judges

parseforge/courtlistener-docket-scraper

Queries all six CourtListener indexes live: 8.3M case law opinions, 8.8M federal PACER dockets, 60M RECAP filings, 15k judges and 102k oral arguments. Filter by court, date, party, docket number, citation, nature of suit or citation count. No API key needed.

ParseForge

CourtListener Scraper

maximedupre/courtlistener

Search public CourtListener opinions, federal RECAP dockets, and oral arguments with one full-text query. Filter supported records by court, dates, judges, citations, or docket numbers, then save structured records with source links.

Maxime Dupré

CourtListener Legal Cases Scraper

ninhothedev/courtlistener-scraper

$0.5/1K 🔥 Fast CourtListener scraper! US court opinions & dockets by keyword — case name, court, date & citations. No key. JSON, CSV, Excel or API in seconds. Pull cases for legal research & litigation intel ⚡

ninhothedev

CourtListener Legal Opinions & Dockets Scraper

chrisp1211/courtlistener-scraper-max

Scrape US legal opinions, dockets and judges from CourtListener. Search case law by keyword and court. Returns case name, court, date, citation and snippet. Optional token raises limits. Pay per result; empty runs free.

Christian Pichichero

iTunes Podcast Snapshot

zentrafoundry/podcast-sponsor-prospect-finder

iTunes Search API podcast collections. Not extracted sponsors or host emails. $0.029 / show.

Zentra

CourtListener Scraper — US Case Law

ponderable_hydrometer/courtlistener-scraper

Search US court opinions and case law from CourtListener (Free Law Project) — case name, court, date, docket, citation and judge. Free, optional key for higher limits.

Ponderable Hydrometer

CourtListener Public Opinion Watch Scraper

taroyamada/courtlistener-public-docket-opinion-watch-scraper

Try for free → Input → Start (1 CourtListener query + 1 opinion ≈ USD 0.01–0.03/query). Monitor public CourtListener opinion search results with case names, courts, docket. From USD 0.01.