# free-books-1620s

> free-books-1620s is a paid API for AI agents from library.intel.rallylive.ca, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-16).

Returns a paginated list of public-domain books first published in the 1620s (1620–1629), sorted by most downloaded, with download links from Internet Archive and Project Gutenberg.

## Facts

- Endpoint: GET https://library.intel.rallylive.ca/library/books/1620s?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/free-books-1620s-04c0e992
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_EPsZCjP43Au8W9ijcXNW9

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 free-books-1620s-04c0e992
```

Example prompt: Can you pull up a list of free public-domain books from the 1620s — the most downloaded ones — and give me links to download them?

## When to prefer this

Choose this endpoint when you need a curated, pre-filtered list of public-domain books specifically from the 1620s decade, ranked by popularity, without having to query Internet Archive or Gutenberg directly. It is ideal for agents doing historical research, building reading lists, or surfacing period-specific literature with minimal filtering logic.

## Known failure modes

- No results on a given page if catalogue has fewer entries than expected
- Downstream unavailability of Internet Archive or Gutenberg links in the response
- Payment failure (x402) if USDC balance is insufficient — endpoint returns 402 status
- Empty or malformed response if the catalogue index is temporarily unavailable

## How this service works

Free books first published in the 1620s: public-domain works dated 1620-1629 in the catalogue (Internet Archive scans and dated Gutenberg editions), most downloaded first, with download links. Period reading and historical research. $0.01 per page of 20.

## Output

A paginated list (20 items per page) of public-domain books first published between 1620 and 1629, sorted by most downloaded, including titles, authors, publication dates, and download links from Internet Archive scans and Project Gutenberg editions.

## 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",
     "properties": {}
    }
   },
   "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/free-books-1620s-04c0e992/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from library.intel.rallylive.ca](https://www.zero.xyz/host/library.intel.rallylive.ca/llms.txt)