CourtListener Legal Opinions & Case Law API
Search CourtListener legal opinions and case law by full text, court, filing date, citation, docket number, or source-reported status for precedent research, litigation analysis, and legal research workflows. Deterministic test: query=artificial intelligence copyright&maxResults=1 returns source-linked National Security Counselors v. Central Intelligence Agency evidence. CourtListener is a non-governmental public archive; results can be incomplete, delayed, duplicated, or corrected and are not official court copies, legal advice, identity verification, Shepardization/KeyCite treatment, or proof an opinion remains controlling law.
1 of 2 routes settlement-verified · $0.01 USDC/request · 2 endpoints / 1 tools · Data · base network · x402 protocol
Verified routes
/x402/v1/courtlistener-legal-opinions· $0.01 · Verified with a $0.01 test payment on 8 Aug 2026 · receipt
Other routes are unverified.
Networks: Base (settlement-verified)
Discovery is free. Agents search the catalogue here. Payment happens on the listing 402, not on PayAPI.
url https://payapi.market/mcpListing facts
- Provider
- AutoScrape
- Hosted at
autoscrape-api-seven.vercel.app- Category
- Data
- Price
- $0.01 USDC per request
- Endpoints
- 2
- MCP tools
- 1
- Payment networks
- Base
- Settlement-verified
- 1 route, last checked 2026-08-08
- Listed on PayAPI Market
- 2026-08-07
Try CourtListener Legal Opinions & Case Law API
Call a verified route without paying first. The server should answer HTTP 402 Payment Required with the price, the USDC asset, the network and the wallet to pay. An x402 client pays that amount on Base and retries with the payment header.
curl -i "https://autoscrape-api-seven.vercel.app/x402/v1/courtlistener-legal-opinions"About this API
CourtListener Legal Opinions & Case Law API is listed in the Data category with pricing at $0.01 USDC/request. One route has been settlement-verified by PayAPI Market on 2026-08-08. View receipt on Basescan.
Payments settle on base in USDC via the x402 protocol. AI agents discover this API through the PayAPI Market MCP server and pay per request without API keys or accounts.
This API exposes 2 endpoints. Only the verified route has been tested by PayAPI Market. Other routes are unverified.
Add this badge to your README
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<a href="https://payapi.market/api/courtlistener-legal-opinions-case-law-api"><img src="https://payapi.market/badge/courtlistener-legal-opinions-case-law-api.svg" alt="Settlement-verified on PayAPI Market" height="20"></a>
Questions about this API
What does CourtListener Legal Opinions & Case Law API do?
Search CourtListener legal opinions and case law by full text, court, filing date, citation, docket number, or source-reported status for precedent research, litigation analysis, and legal research workflows. Deterministic test: query=artificial intelligence copyright&maxResults=1 returns source-linked National Security Counselors v. Central Intelligence Agency evidence. CourtListener is a non-governmental public archive; results can be incomplete, delayed, duplicated, or corrected and are not official court copies, legal advice, identity verification, Shepardization/KeyCite treatment, or proof an opinion remains controlling law. It is provided by AutoScrape.
How much does CourtListener Legal Opinions & Case Law API cost?
CourtListener Legal Opinions & Case Law API is priced at $0.01 USDC per request, paid per call with no subscription. Verified with a $0.01 test payment on 8 Aug 2026. The exact amount for each call is in the HTTP 402 response before any money moves.
Do I need an API key or account to use CourtListener Legal Opinions & Case Law API?
No. CourtListener Legal Opinions & Case Law API uses the x402 protocol, so an agent pays per request in USDC on Base and gets the response, with no API key, account or signup.
Has CourtListener Legal Opinions & Case Law API been verified?
Yes, 1 route of its 2 endpoints. PayAPI Market paid for a real call from its own wallet, received real data back and recorded the USDC settlement on-chain, most recently on 2026-08-08. Routes that were not paid for are unverified.
How does an AI agent find CourtListener Legal Opinions & Case Law API?
Through the free PayAPI Market MCP server at https://payapi.market/mcp, using search_apis or get_api, or over plain HTTP at https://payapi.market/agent/search. Discovery is free; the agent pays the provider directly on the listing's own 402.
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