Citations that survive scrutiny
Search and verify legal and academic citations across 180+ jurisdictions, in real time, against the primary sources themselves. Built for law firms, publishers, and compliance teams.
Request
{"citation": "Adams v. Meridian [2021] EWCA Civ 392",
"jurisdictions": ["gb", "de", "eu"]}
Response
{
"status": "valid",
"authority": "EWCA Civ",
"citing": { "gb": 47, "de": 12, "eu": 9 },
"superseded": false
}
One request returns validity, the citing authority, and the count of citing works per jurisdiction.
Registry size2.4 billion
Jurisdictions180+
Verification speedunder 50ms
Uptime SLA99.98%
What the registry does
Citation quality and provenance across jurisdictions, without maintaining 180 different sources yourself.
Search Query
Case law, regulations, and academic citations across EU, UK, US, APAC, and 175+ other jurisdictions, searched simultaneously.
- Jurisdiction-aware result ranking
- Parallel search across regional corpora
- Reporter and citation format normalization
us212k sources
eu94k sources
apac76k sources
uk58k sources
Verification On the record
Real-time validity checks against primary sources catch retracted papers, superseded regulations, and broken references before they land in a filing or a manuscript.
- Retraction and supersession detection
- Broken and mismatched reference discovery
- Scheduled re-checks with change alerts
Adams v. Meridian [2021] EWCA Civ 392 valid
Directive (EU) 2019/770 superseded
doi:10.1038/s41586-021-03419-6 retracted
Bell v. Tesco [1985] 1 WLR 12 valid
The graph Traverse
Walk forward and backward through citation networks across borders. Identify authoritative sources, orphaned references, and citation clusters programmatically.
- Forward and backward traversal, unlimited depth
- Authority scoring per node
- Cluster and pattern detection
Meridian [2019]authority 0.97
Adams [2021]authority 0.91
Huber [2018]authority 0.64
cross-border61 edges
Analytics Measure
Citation velocity, geographic spread, and downstream influence tracked per jurisdiction. Batch audits run asynchronously with webhook completion, and everything is SOC 2 Type II audited.
- Citation velocity and geographic spread
- Async batch audits with webhooks
- SOC 2 Type II, SSO/SAML, audit logs
gb41% of citing works
eu27% of citing works
us19% of citing works
other13% of citing works
The API
A small, predictable interface. Everything is scoped to a citation. Everything returns provenance.
POST/v1/searchMulti-jurisdiction citation search
POST/v1/verifyLive validity check against primary sources
GET/v1/verify/{id}Retrieve an async verification result
GET/v1/graphForward and backward citation traversal
GET/v1/analyticsImpact, velocity, and geographic spread
POST/v1/batchAsync batch verification with webhooks
Live in five lines
Install the client, search, verify. No infrastructure to stand up.
# pip install crossbordercite
from crossbordercite import Client
client = Client(api_key="cbc_live_...")
results = client.search(
query="product liability, autonomous systems",
jurisdictions=["gb", "de", "us"],
source_types=["case_law", "regulation"],
)
for hit in results:
client.verify(hit.citation)
Works alongside the reference managers and corpora your team already uses: Zotero, Mendeley, EndNote, Scopus, Crossref, Westlaw, Lexis+, and Overton. Official clients for Python (pip install crossbordercite) and TypeScript (npm install @crossbordercite/sdk).
Fee schedule
Verification is included at every tier. Billing tracks lookups and graph traversal, nothing else.
Professional · most requested
$199/mo
100,000 citation lookups/mo
- All 180+ jurisdictions
- Full citation graph traversal
- Batch API and webhooks
- Impact analytics
- Priority support
- SOC 2 Type II report on request
Researcher
$49/mo
10,000 citation lookups/mo
- 20 jurisdictions
- Citation graph (depth 3)
- CSV export
- Email support
Enterprise
Custom
For institutions and platform integrators
- Unlimited lookups
- Private deployment
- SLA + SSO/SAML
- Dedicated CSM
- Custom data sources
Verify every citation you file.
Run your first multi-jurisdiction search in minutes.