CourtListener
REMOTE · COURTLISTENER-MCP.VAQUILL.AI · SCANNED AUG 3
MCP for CourtListener: US federal and state opinions, dockets, judges, plus eCFR regulations.
Available components
How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. How we score →
Endpoint Security60
- The endpoint's TLS certificate is valid, in date, and uses a strong key. View diagnostics → Pass
- Authorisation not fully verified: no authorisation is required to call this server, and 34 tool(s) never declared a destructiveHint. The MCP spec treats an absent hint as destructive by default, so we cannot call this surface safe. See how to fix → View diagnostics → Unverified
- HTTPS is enforced; there's no plaintext access path. View diagnostics → Pass
- HSTS check failed: the Strict-Transport-Security header is absent. See how to fix → View diagnostics → Fail
- DNSSEC is configured correctly; the domain's records validate against the full chain to the root. View diagnostics → Pass
Transport & Reachability100
- Verified streamable-http transport via a live MCP handshake. View diagnostics → Pass
Schema Quality & AI Usability70
- AI-judged instruction clarity (good).Pass
- Tool/resource definitions use about 2987 tokens (~87/item across 34 items; 34 tools + 0 resources), lean.Pass
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management27
- Stability observed for 8 of 30 days with no destabilising changes; credit accrues until the full window elapses.Partial
Tool Coverage100
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 100% of tool parameters carry a description.Pass
- Structured output schemas are declared (100% of tools); any adoption earns full credit.Pass
Capabilities100
- Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.Pass
Add this component to your MCP client. Where a client-specific snippet is available, pick your client below and copy it straight into your config; otherwise use the connection detail shown.
remote · courtlistener-mcp.vaquill.ai
claude mcp add --transport http vaquill-ai-courtlistener-mcp https://courtlistener-mcp.vaquill.ai/mcp/
[mcp_servers.vaquill-ai-courtlistener-mcp] url = "https://courtlistener-mcp.vaquill.ai/mcp/"
{
"$schema": "https://opencode.ai/config.json",
"mcp": {
"vaquill-ai-courtlistener-mcp": {
"type": "remote",
"url": "https://courtlistener-mcp.vaquill.ai/mcp/",
"enabled": true
}
}
} openclaw mcp add vaquill-ai-courtlistener-mcp --url https://courtlistener-mcp.vaquill.ai/mcp/ --transport streamable-http
mcp_servers:
vaquill-ai-courtlistener-mcp:
url: "https://courtlistener-mcp.vaquill.ai/mcp/" {
"mcpServers": {
"vaquill-ai-courtlistener-mcp": {
"type": "http",
"url": "https://courtlistener-mcp.vaquill.ai/mcp/"
}
}
} The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.
Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.
- 3 Aug 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 23 to 27. That category is still filling its 30-day observation window: 7 days of observed history at the previous scan, 8 at this one. The score rises as the window fills, whether or not the server changes.
- 31 Jul 26 +1
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 29 Jul 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 7 to 10. That category is still filling its 30-day observation window: 2 days of observed history at the previous scan, 3 at this one. The score rises as the window fills, whether or not the server changes.
- 28 Jul 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 3 to 7. That category is still filling its 30-day observation window: 1 days of observed history at the previous scan, 2 at this one. The score rises as the window fills, whether or not the server changes.
- 27 Jul 26 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 26 Jul 26 63
First indexed and scored.
Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.
Captured 3 Aug 2026 · Probed https://courtlistener-mcp.vaquill.ai/mcp/
TLS valid
Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=vaquill.ai | CN=WE1,O=Google Trust Services,C=US | 21 Jul 2026 | 19 Oct 2026 | ECDSA 256 | ECDSA-SHA256 | 54eb5de5a227ced01373f8f88d87f439 |
| SANs: vaquill.ai, *.vaquill.ai | ||||||
| CN=WE1,O=Google Trust Services,C=US (CA) | CN=GTS Root R4,O=Google Trust Services LLC,C=US | 13 Dec 2023 | 20 Feb 2029 | ECDSA 256 | ECDSA-SHA384 | 7ff31977972c224a76155d13b6d685e3 |
| CN=GTS Root R4,O=Google Trust Services LLC,C=US (CA) | CN=GlobalSign Root CA,OU=Root CA,O=GlobalSign nv-sa,C=BE | 15 Nov 2023 | 28 Jan 2028 | ECDSA 384 | SHA256-RSA | 7fe530bf331343bedd821610493d8a1b |
DNSSEC secure
Validation of courtlistener-mcp.vaquill.ai. — Secure
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | trust_anchor | 20326, 38696 | 8, 8 | Verified |
| ai. | present | 3799 | 8 | Verified |
| vaquill.ai. | present | 2371 | 13 | Verified |
| courtlistener-mcp.vaquill.ai. | Verified address RRset verified with the apex keys |
Authentication No authorisation required
The endpoint answered without asking for a token. Anyone who knows the URL can reach it.
| Result | No authorisation required |
|---|---|
| HTTP status | 200 |
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://courtlistener-mcp.vaquill.ai/mcp/ | Verified | 200 | |
| http (plaintext) | http://courtlistener-mcp.vaquill.ai/mcp/ | HTTPS enforced | 301 | https://courtlistener-mcp.vaquill.ai/mcp/ |
The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability.
citation_batch_lookup_citations ~60
Look up multiple legal citations in a single request. This is more efficient than making individual requests for each citation. Accepts up to 100 citations at once.
| Name | Type | Req | Description |
|---|---|---|---|
| citations | array | yes | List of citations to look up (max 100) |
Structured output declared, but exposes no named fields.
No examples provided.
citation_enhanced_citation_lookup ~83
Enhanced citation lookup combining citeurl parsing with CourtListener data. This tool first uses citeurl to parse and validate the citation format, then optionally queries the CourtListener API for additional case information.
| Name | Type | Req | Description |
|---|---|---|---|
| citation | string | yes | The citation to look up and analyze |
| include_courtlistener | boolean | — | Whether to also perform CourtListener API lookup |
Structured output declared, but exposes no named fields.
No examples provided.
citation_extract_citations_from_text ~66
Extract all legal citations from a block of text using citeurl. This tool finds and parses all legal citations within a given text, including both long-form and short-form citations (like 'id.' references).
| Name | Type | Req | Description |
|---|---|---|---|
| text | string | yes | Text containing legal citations to extract |
Structured output declared, but exposes no named fields.
No examples provided.
citation_lookup_citation ~120
Look up a legal citation to find the opinion it references in CourtListener. This tool accepts various citation formats including: - U.S. Reporter citations (e.g., "410 U.S. 113") - Federal Reporter citations (e.g., "123 F.3d 456") - WestLaw citations (e.g., "2023 WL 12345") - State reporter citations
| Name | Type | Req | Description |
|---|---|---|---|
| citation | string | yes | The citation to look up (e.g., '410 U.S. 113', '2023 WL 12345') |
Structured output declared, but exposes no named fields.
No examples provided.
citation_parse_citation_with_citeurl ~137
Parse a legal citation using citeurl's advanced citation recognition. This tool uses the citeurl library to parse legal citations and extract structured information including tokens, normalized format, and URL generation. Returns detailed information about the citation including: - Recognized citation format and source - Extracted tokens (volume, reporter, page, etc.) - Generated URL if available - Normalized citation text
| Name | Type | Req | Description |
|---|---|---|---|
| broad | boolean | — | Use broad matching for more flexible parsing |
| citation | string | yes | The citation to parse (e.g., '410 U.S. 113', '42 USC § 1988') |
Structured output declared, but exposes no named fields.
No examples provided.
citation_verify_citation_format ~87
Verify if a citation string is in a valid format using citeurl's advanced parsing. This tool performs validation using citeurl's comprehensive citation templates to check if a citation appears to be in a recognized legal citation format. This is much more accurate than simple regex matching. Returns information about the citation format and any detected issues.
| Name | Type | Req | Description |
|---|---|---|---|
| citation | string | yes | The citation to verify |
Structured output declared, but exposes no named fields.
No examples provided.
ecfr_get_ancestry ~92
Get the ancestry chain (title -> ... -> node) for a CFR node on a date.
| Name | Type | Req | Description |
|---|---|---|---|
| date | string | yes | Snapshot date (YYYY-MM-DD) |
| part | — | — | Restrict to a part, e.g. '75' |
| section | — | — | Restrict to a section, e.g. '75.1' |
| title | integer | yes | CFR title number (1-50) |
Structured output declared, but exposes no named fields.
No examples provided.
ecfr_get_daily_search_counts ~50
Get search result counts broken down by date (daily histogram).
| Name | Type | Req | Description |
|---|---|---|---|
| date | — | — | As-of date (YYYY-MM-DD) |
| query | string | yes | Full-text search query over the CFR |
Structured output declared, but exposes no named fields.
No examples provided.
ecfr_get_hierarchy_search_counts ~49
Get search result counts distributed across the CFR hierarchy.
| Name | Type | Req | Description |
|---|---|---|---|
| date | — | — | As-of date (YYYY-MM-DD) |
| query | string | yes | Full-text search query over the CFR |
Structured output declared, but exposes no named fields.
No examples provided.
ecfr_get_search_count ~72
Get the total number of CFR sections matching a search query.
| Name | Type | Req | Description |
|---|---|---|---|
| agency_slugs | — | — | Restrict to agency slugs |
| date | — | — | As-of date (YYYY-MM-DD) |
| query | string | yes | Full-text search query over the CFR |
| title | — | — | Restrict to a title |
Structured output declared, but exposes no named fields.
No examples provided.
ecfr_get_search_suggestions ~35
Get search-term suggestions for a partial CFR query.
| Name | Type | Req | Description |
|---|---|---|---|
| query | string | yes | Partial query to get suggestions for |
Structured output declared, but exposes no named fields.
No examples provided.
ecfr_get_search_summary ~74
Get summary details (counts + metadata) for a CFR search query.
| Name | Type | Req | Description |
|---|---|---|---|
| agency_slugs | — | — | Restrict to agency slugs |
| date | — | — | As-of date (YYYY-MM-DD) |
| query | string | yes | Full-text search query over the CFR |
| title | — | — | Restrict to a title |
Structured output declared, but exposes no named fields.
No examples provided.
ecfr_get_source_xml ~201
Fetch the source regulation TEXT (XML) for a CFR node on a snapshot date. Pass a part or section to scope the request. Fetching an entire large title at once can time out on the eCFR side, so narrowing is strongly recommended. Returns the raw XML under ``content_xml``.
| Name | Type | Req | Description |
|---|---|---|---|
| appendix | — | — | Appendix identifier |
| chapter | — | — | Chapter, e.g. 'I' |
| date | string | yes | Snapshot date (YYYY-MM-DD) |
| part | — | — | Part to fetch, e.g. '75'. STRONGLY recommended: whole-title fetches can time out. |
| section | — | — | Section, e.g. '75.1' |
| subchapter | — | — | Subchapter, e.g. 'B' |
| subpart | — | — | Subpart, e.g. 'C' |
| subtitle | — | — | Subtitle, e.g. 'A' |
| title | integer | yes | CFR title number (1-50) |
Structured output declared, but exposes no named fields.
No examples provided.
ecfr_get_title_search_counts ~48
Get search result counts broken down by CFR title.
| Name | Type | Req | Description |
|---|---|---|---|
| date | — | — | As-of date (YYYY-MM-DD) |
| query | string | yes | Full-text search query over the CFR |
Structured output declared, but exposes no named fields.
No examples provided.
ecfr_get_title_structure ~56
Get the full hierarchical structure (title -> section) of a CFR title on a date.
| Name | Type | Req | Description |
|---|---|---|---|
| date | string | yes | Snapshot date (YYYY-MM-DD) |
| title | integer | yes | CFR title number (1-50) |
Structured output declared, but exposes no named fields.
No examples provided.
ecfr_get_title_versions ~39
List the available content versions (issue dates) for one CFR title.
| Name | Type | Req | Description |
|---|---|---|---|
| title | integer | yes | CFR title number (1-50) |
Structured output declared, but exposes no named fields.
No examples provided.
ecfr_list_agencies ~27
List all agencies that appear in the CFR, with their title/chapter references.
Input schema present but exposes no named parameters.
Structured output declared, but exposes no named fields.
No examples provided.
ecfr_list_all_corrections ~54
List CFR corrections, optionally filtered by title and/or effective date.
| Name | Type | Req | Description |
|---|---|---|---|
| date | — | — | Corrections in effect on this date (YYYY-MM-DD) |
| title | — | — | Restrict to a CFR title number |
Structured output declared, but exposes no named fields.
No examples provided.
ecfr_list_corrections_by_title ~37
List all corrections for a single CFR title.
| Name | Type | Req | Description |
|---|---|---|---|
| title | integer | yes | CFR title number (1-50) |
Structured output declared, but exposes no named fields.
No examples provided.
ecfr_list_titles ~26
List all 50 CFR titles with their latest amended/issue dates and status.
Input schema present but exposes no named parameters.
Structured output declared, but exposes no named fields.
No examples provided.
ecfr_search_regulations ~136
Full-text search over federal regulations, returning matching sections with hierarchy.
| Name | Type | Req | Description |
|---|---|---|---|
| agency_slugs | — | — | Restrict to one or more agency slugs (from list_agencies) |
| date | — | — | Search the CFR as of this date (YYYY-MM-DD) |
| order | — | — | Sort order: 'relevance', 'hierarchy', 'newest_first', 'oldest_first' |
| page | integer | — | Page number |
| per_page | integer | — | Results per page (max 20) |
| query | string | yes | Full-text search query over the CFR |
| title | — | — | Restrict to a CFR title number |
Structured output declared, but exposes no named fields.
No examples provided.
get_audio ~33
Get oral argument audio information by ID from CourtListener.
| Name | Type | Req | Description |
|---|---|---|---|
| audio_id | string | yes | The audio recording ID to retrieve |
Structured output declared, but exposes no named fields.
No examples provided.
get_cluster ~32
Get an opinion cluster by ID from CourtListener.
| Name | Type | Req | Description |
|---|---|---|---|
| cluster_id | string | yes | The opinion cluster ID to retrieve |
Structured output declared, but exposes no named fields.
No examples provided.
get_court ~42
Get court information by ID from CourtListener.
| Name | Type | Req | Description |
|---|---|---|---|
| court_id | string | yes | The court ID to retrieve (e.g., 'scotus', 'ca9') |
Structured output declared, but exposes no named fields.
No examples provided.
get_docket ~33
Get a specific court docket by ID from CourtListener.
| Name | Type | Req | Description |
|---|---|---|---|
| docket_id | string | yes | The docket ID to retrieve |
Structured output declared, but exposes no named fields.
No examples provided.
get_opinion ~33
Get a specific court opinion by ID from CourtListener.
| Name | Type | Req | Description |
|---|---|---|---|
| opinion_id | string | yes | The opinion ID to retrieve |
Structured output declared, but exposes no named fields.
No examples provided.
get_person ~36
Get judge or legal professional information by ID from CourtListener.
| Name | Type | Req | Description |
|---|---|---|---|
| person_id | string | yes | The person (judge) ID to retrieve |
Structured output declared, but exposes no named fields.
No examples provided.
search_audio ~158
Search oral argument audio recordings in CourtListener.
| Name | Type | Req | Description |
|---|---|---|---|
| argued_after | — | — | Filter arguments after this date (YYYY-MM-DD) |
| argued_before | — | — | Filter arguments before this date (YYYY-MM-DD) |
| case_name | — | — | Filter by case name |
| court | — | — | Court ID filter (e.g., 'scotus', 'ca9') |
| cursor | — | — | Pagination cursor from a prior response's next_cursor |
| judge | — | — | Filter by judge name |
| limit | integer | — | Max results from this page (upper bound; CL pages ~20) |
| order_by | string | — | Sort by 'score desc', 'dateArgued desc', or 'dateArgued asc' |
| q | string | yes | Search query for oral argument audio |
Structured output declared, but exposes no named fields.
No examples provided.
search_dockets ~182
Search federal cases (dockets) from PACER in CourtListener.
| Name | Type | Req | Description |
|---|---|---|---|
| case_name | — | — | Filter by case name |
| court | — | — | Court ID filter (e.g., 'scotus', 'ca9') |
| cursor | — | — | Pagination cursor from a prior response's next_cursor |
| date_filed_after | — | — | Filter dockets filed after this date (YYYY-MM-DD) |
| date_filed_before | — | — | Filter dockets filed before this date (YYYY-MM-DD) |
| docket_number | — | — | Specific docket number to search for |
| limit | integer | — | Max results from this page (upper bound; CL pages ~20) |
| order_by | string | — | Sort by 'score desc', 'dateFiled desc', or 'dateFiled asc' |
| party_name | — | — | Filter by party name |
| q | string | yes | Search query for docket text |
Structured output declared, but exposes no named fields.
No examples provided.
search_dockets_with_documents ~201
Search federal cases (dockets) with up to three nested documents. If there are more than three matching documents, the more_docs field will be true.
| Name | Type | Req | Description |
|---|---|---|---|
| case_name | — | — | Filter by case name |
| court | — | — | Court ID filter (e.g., 'scotus', 'ca9') |
| cursor | — | — | Pagination cursor from a prior response's next_cursor |
| date_filed_after | — | — | Filter dockets filed after this date (YYYY-MM-DD) |
| date_filed_before | — | — | Filter dockets filed before this date (YYYY-MM-DD) |
| docket_number | — | — | Specific docket number to search for |
| limit | integer | — | Max results from this page (upper bound; CL pages ~20) |
| order_by | string | — | Sort by 'score desc', 'dateFiled desc', or 'dateFiled asc' |
| party_name | — | — | Filter by party name |
| q | string | yes | Search query for federal cases |
Structured output declared, but exposes no named fields.
No examples provided.
search_opinions ~195
Search case law opinion clusters with nested Opinion documents in CourtListener.
| Name | Type | Req | Description |
|---|---|---|---|
| case_name | — | — | Filter by case name |
| cited_gt | — | — | Minimum number of times opinion has been cited |
| cited_lt | — | — | Maximum number of times opinion has been cited |
| court | — | — | Court ID filter (e.g., 'scotus', 'ca9') |
| cursor | — | — | Pagination cursor from a prior response's next_cursor |
| filed_after | — | — | Only show opinions filed after this date (YYYY-MM-DD) |
| filed_before | — | — | Only show opinions filed before this date (YYYY-MM-DD) |
| judge | — | — | Filter by judge name |
| limit | integer | — | Max results from this page (upper bound; CL pages ~20) |
| order_by | string | — | Sort by 'score desc', 'dateFiled desc', or 'dateFiled asc' |
| q | string | yes | Search query for full text of opinions |
Structured output declared, but exposes no named fields.
No examples provided.
search_people ~154
Search judges and legal professionals in the CourtListener database.
| Name | Type | Req | Description |
|---|---|---|---|
| appointed_by | — | — | Filter by appointing authority |
| cursor | — | — | Pagination cursor from a prior response's next_cursor |
| limit | integer | — | Max results from this page (upper bound; CL pages ~20) |
| name | — | — | Filter by person's name |
| order_by | string | — | Sort by 'score desc' or 'name asc' |
| political_affiliation | — | — | Filter by political affiliation |
| position_type | — | — | Filter by position type (e.g., 'jud' for judge) |
| q | string | yes | Search query for judges and legal professionals |
| school | — | — | Filter by school attended |
| selection_method | — | — | Filter by selection method |
Structured output declared, but exposes no named fields.
No examples provided.
search_recap_documents ~202
Search federal filing documents from PACER in the RECAP archive.
| Name | Type | Req | Description |
|---|---|---|---|
| attachment_number | — | — | Specific attachment number to search for |
| case_name | — | — | Filter by case name |
| court | — | — | Court ID filter (e.g., 'scotus', 'ca9') |
| cursor | — | — | Pagination cursor from a prior response's next_cursor |
| docket_number | — | — | Specific docket number to search for |
| document_number | — | — | Specific document number to search for |
| filed_after | — | — | Filter documents filed after this date (YYYY-MM-DD) |
| filed_before | — | — | Filter documents filed before this date (YYYY-MM-DD) |
| limit | integer | — | Max results from this page (upper bound; CL pages ~20) |
| order_by | string | — | Sort by 'score desc', 'dateFiled desc', or 'dateFiled asc' |
| party_name | — | — | Filter by party name |
| q | string | yes | Search query for RECAP filing documents |
Structured output declared, but exposes no named fields.
No examples provided.
status ~33
Check the status of the CourtListener MCP server. Returns: A dictionary containing server status, system metrics, and service information.
Input schema present but exposes no named parameters.
Structured output declared, but exposes no named fields.
No examples provided.