# ForgeMesh Library — QC Shelf (Science)

> ForgeMesh Library — QC Shelf (Science) 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 in the QC (physics/science) Dewey category, with drill-down routes for full-text retrieval.

## Facts

- Endpoint: POST https://library.forgemesh.io/qc
- 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-qc-shelf-science-909bfb40
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_P1rBmXyr3ksrkOB3hGNID

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-qc-shelf-science-909bfb40 -d '<json body>'
```

Example prompt: Can you show me up to 30 public-domain science books from the QC shelf — things like old physics texts, weather science books, or electrical apparatus guides?

## When to prefer this

Use this endpoint when you need to browse or list public-domain science/physics books curated under the QC Dewey classification. Prefer it over full-text search when you want a curated shelf overview rather than passage-level results, and when you don't have a specific query but want to discover available titles in the science domain.

## Known failure modes

- limit exceeds 50 returns an error or is clamped to max
- no books found for the shelf (unlikely given 166 known entries)
- payment not processed results in 402 response
- malformed request body returns validation error

## How this service works

Curated shelf: QC — 166 public-domain books including The Boy with the U. S. Weather Men, How Two Boys Made Their Own Electrical Apparatus Containing Complete Directions for Making All Kinds of Simple Apparatus for the Study of Elementary Electricity, The Book of the Damned. 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 books in the QC (science/physics) Dewey category — up to 50 titles — each with metadata and drill-down routes for retrieving the full text of any title.

## 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 Boy with the U. S. Weather Men",
    "author": "Rolt-Wheeler, Francis",
    "book_id": 22156,
    "subjects": [],
    "download_count": 9654
   }
  ],
  "count": 5,
  "shelf": "QC",
  "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-qc-shelf-science-909bfb40/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)