# ForgeMesh Library Shelf D501 — WWI Military History Books

> ForgeMesh Library Shelf D501 — WWI Military History Books is a paid API for AI agents from library.forgemesh.io, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-13).

Returns a ranked list of up to 50 public-domain books from the D501 shelf (WWI naval, military, and air force history) with drill-down routes for full-text retrieval.

## Facts

- Endpoint: POST https://library.forgemesh.io/d501
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/forgemesh-library-shelf-d501-wwi-military-history-books-78b5b210
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_XJtkA3mI5BST03t3Rbu53

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 forgemesh-library-shelf-d501-wwi-military-history-books-78b5b210 -d '<json body>'
```

Example prompt: Show me up to 30 books from the D501 shelf on ForgeMesh Library — I'm looking for public-domain titles about WWI naval and military history, including texts about the Royal Air Force and fallen soldiers.

## When to prefer this

Use this endpoint when you need to browse or list a curated set of public-domain WWI military, naval, or air force history books from the D501 shelf. Prefer this over full-text search when you want a ranked browsable catalog rather than passage-level results. Ideal for research agents building reading lists or citation databases around WWI history topics.

## Known failure modes

- Requesting more than 50 books returns only 50 (max enforced)
- Payment failure (x402) if USDC balance is insufficient
- Empty or partial result if shelf index is temporarily unavailable
- Drill-down routes may require additional calls to retrieve full text

## How this service works

Curated shelf: D501 — 811 public-domain books including The Roll of Honour, Volume 1 : $b A biographical record of all members of His Majesty's naval and military forces who have fallen in the war, The silent Baltic : $b or, Detained near Kiel, The War in the Air; Vol. 1 The Part played in the Great War by the Royal Air Force. Returns a ranked list with drill-down routes for full-text retrieval. No license, no API key required.

## Output

A ranked list of public-domain book entries from the D501 shelf (up to 50), each with title, author, and drill-down routes to retrieve the full text. No license or API key required.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "limit": {
   "type": "integer",
   "description": "Max books to return (default 20, max 50)"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "books": [
   {
    "year": null,
    "title": "The Roll of Honour, Volume 1 : $b A biographical record of all members of His Majesty's naval and military forces who have fallen in the war",
    "author": "Ruvigny et Raineval, Melville Henry Massue, marquis de",
    "book_id": 75883,
    "subjects": [],
    "download_count": 28307
   }
  ],
  "count": 5,
  "shelf": "D501",
  "coverage": {
   "target": 61015,
   "indexed": 61015
  },
  "drill_down": [
   "/book-metadata",
   "/book-chapter",
   "/book-quotes",
   "/literature-search"
  ]
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/forgemesh-library-shelf-d501-wwi-military-history-books-78b5b210/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from library.forgemesh.io](https://www.zero.xyz/host/library.forgemesh.io/llms.txt)