# EU Court Citation Graph

> EU Court Citation Graph is a paid API for AI agents from recht.halowerk.com, paid per call via x402, $0.007/call, status unknown (last checked 2026-09-16).

For a given EU Court of Justice or General Court decision, returns the legal acts and earlier rulings it cites (outbound) and the later rulings that cite it (inbound), each with CELEX number and date.

## Facts

- Endpoint: POST https://recht.halowerk.com/v1/court-citation-graph
- Price: $0.007/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/eu-court-citation-graph-4bd13ab5
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_thtduX1rVIl0m6L6NPBHz

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability eu-court-citation-graph-4bd13ab5 -d '<json body>'
```

Example prompt: Can you pull the citation graph for CJEU ruling C-362/14 — I want to see which legal acts and earlier judgments it cites, and how many later rulings have cited it back?

## When to prefer this

Choose this endpoint when you need to understand a specific EU court decision's position in the case law network — either tracing what it relied on or measuring its downstream influence by inbound citation count. It is the right tool for legal research, precedent analysis, and assessing doctrinal weight of CJEU or General Court rulings. Prefer it over full-text search when you already have a decision identifier and need structured citation relationships rather than document content.

## Known failure modes

- Unknown or malformed CELEX/decision identifier returns an error or empty result
- Decision not indexed in the citation graph returns empty citation lists
- Non-court documents (e.g. regulations, directives) may not be supported as the primary input
- Network or upstream data source unavailability returns a service error
- Very recent judgments may have zero inbound citations if not yet cited

## How this service works

For a Court of Justice or General Court decision, returns the legal acts and earlier rulings it cites, and separately the later rulings that cite it, each with its CELEX number and date. The inbound count is the substance: how often a ruling is cited is the best available measure of its weight in the case law, since a judgment thirty later ones rely on carries the doctrine while one nobody cites decided a single case, and the two are indistinguishable from the text alone.

## Output

Returns two structured lists: (1) outbound citations — the legal acts and earlier court rulings referenced by the queried decision, each with CELEX number and date; (2) inbound citations — the later court rulings that cite the queried decision, each with CELEX number and date, plus an inbound citation count reflecting the ruling's weight in EU case law.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "celex": {
   "type": "string",
   "maxLength": 30,
   "minLength": 5,
   "description": "CELEX of a court decision, e.g. 62019CJ0311."
  },
  "limit": {
   "type": "integer",
   "default": 50,
   "maximum": 150,
   "minimum": 5
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/eu-court-citation-graph-4bd13ab5/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from recht.halowerk.com](https://www.zero.xyz/host/recht.halowerk.com/llms.txt)