# x402helper.xyz US Court Case Lookup

> x402helper.xyz US Court Case Lookup is a paid API for AI agents from x402helper.xyz, paid per call via x402, $0.039/call, status unknown (last checked 2026-10-22).

Search US federal and state court cases, opinions, and dockets by business name, returning case metadata including court, date, citation, docket number, and nature of suit.

## Facts

- Endpoint: GET https://x402helper.xyz/89e509/legal/litigation?utm_source=zero.xyz
- Price: $0.039/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-22
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402helper-xyz-us-court-case-lookup-cb9fd7d1
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_cGD048P4rvmyKjruo85Zv

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 x402helper-xyz-us-court-case-lookup-cb9fd7d1
```

Example prompt: Can you look up all US court cases naming Theranos as a party — I need the case name, court, filing date, docket number, citation, and nature of suit for each one?

## When to prefer this

Choose this endpoint when you need structured US litigation data for a specific business entity, especially for due diligence, vendor risk screening, or competitive research. It is well-suited for agents that need case metadata (docket, citation, court, date) in a machine-readable format rather than raw court website scraping. Prefer this over general web search when you need structured, citable legal records.

## Known failure modes

- Business name not found in court records — returns empty result set
- Ambiguous business name matching multiple entities — may return broad or irrelevant results
- Rate limit or payment failure via X402 protocol — returns 402 Payment Required
- Partial results for very common business names due to query limits
- Underlying court database may not be fully current or may exclude some state courts

## How this service works

Find US court cases, opinions and dockets naming a business, with case name, court, date, citation, docket number and nature of suit.

## Output

Returns a list of US court cases naming the queried business, each with: case name, court (e.g. district or circuit), filing or decision date, legal citation, docket number, and nature of suit classification.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [],
     "properties": {
      "cik": {
       "type": "string",
       "default": null,
       "description": "Optional SEC CIK id hint"
      },
      "qid": {
       "type": "string",
       "default": null,
       "description": "Optional Wikidata QID id hint"
      },
      "name": {
       "type": "string",
       "default": null,
       "description": "Business entity / party name to search"
      },
      "type": {
       "enum": [
        "o",
        "r",
        "d"
       ],
       "type": "string",
       "default": null,
       "description": "Record type: opinions, RECAP dockets, or dockets"
      },
      "limit": {
       "type": "integer",
       "default": null,
       "maximum": 25,
       "minimum": 1,
       "description": "Max records to return, default 10"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402helper-xyz-us-court-case-lookup-cb9fd7d1/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402helper.xyz](https://www.zero.xyz/host/x402helper.xyz/llms.txt)