# Caselaw Access Project Reporter Volume Metadata

> Caselaw Access Project Reporter Volume Metadata is a paid API for AI agents from api.companyrecords-api.workers.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-24).

Returns volume-level metadata (volume number, publisher, year, jurisdictions, volume ID) for a specified legal reporter series from the Caselaw Access Project.

## Facts

- Endpoint: GET https://api.companyrecords-api.workers.dev/api/gov/caselaw-access?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-24
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/caselaw-access-project-reporter-volume-metadata-0f8fd1dd
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Bb8qt-DYA8dZTXVNzUV8r

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 caselaw-access-project-reporter-volume-metadata-0f8fd1dd
```

Example prompt: Can you pull up the volume metadata for the Atlantic Reporter 2nd series (a2d) from the Caselaw Access Project — I need the volume numbers, publishers, publication years, and jurisdictions for the first 10 volumes?

## When to prefer this

Choose this endpoint when you need structured bibliographic metadata about legal reporter volumes (volume numbers, years, publishers, jurisdictions) from the Caselaw Access Project without needing full case text. Ideal for building legal research indexes, verifying reporter coverage, or cross-referencing volume IDs before fetching case documents from another source.

## Known failure modes

- Unknown or misspelled reporter slug returns empty volumes array or error
- Limit parameter outside 1–20 range may be rejected or clamped
- Reporter slug that exists on static.case.law but has no indexed metadata returns empty result
- Network timeout from upstream static.case.law data source
- Rate limiting or payment failure at the x402 paywall layer

## How this service works

Caselaw Access Project volume metadata for one reporter (for example a2d = Atlantic Reporter, 2nd series): volume number, publisher, year, jurisdictions and volume ID. Returns volume metadata only; case texts are not included.

## Output

A JSON object containing the reporter slug queried, the source URL on static.case.law, a checkedAt timestamp, the total number of volumes, and an array of volume objects each with volumeId, volumeNumber, publisher, publicationYear, jurisdictions array, reporterSlug, and a nullable title field.

## 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": [
      "reporter"
     ],
     "properties": {
      "limit": {
       "type": "string",
       "description": "Volumes to return, 1 to 20 (default 5)"
      },
      "reporter": {
       "type": "string",
       "description": "Reporter slug as used on static.case.law, e.g. a2d, a3d, us"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "source": "https://static.case.law/a2d/VolumesMetadata.json",
  "volumes": [
   {
    "title": null,
    "volumeId": "32044109578716",
    "publisher": "West Publishing Co.",
    "reporterSlug": "a2d",
    "volumeNumber": "100",
    "jurisdictions": [
     "District of Columbia",
     "Delaware"
    ],
    "publicationYear": 1954
   },
   {
    "title": null,
    "volumeId": "32044109578567",
    "publisher": "West Publishing Co.",
    "reporterSlug": "a2d",
    "volumeNumber": "101",
    "jurisdictions": [
     "District of Columbia",
     "Delaware"
    ],
    "publicationYear": 1954
   }
  ],
  "reporter": "a2d",
  "checkedAt": "2026-10-23T09:37:13.719Z",
  "totalVolumes": 967
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/caselaw-access-project-reporter-volume-metadata-0f8fd1dd/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.companyrecords-api.workers.dev](https://www.zero.xyz/host/api.companyrecords-api.workers.dev/llms.txt)