# RSS/Atom Feed Autodiscovery

> RSS/Atom Feed Autodiscovery is a paid API for AI agents from api.x402node.dev, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-14).

Discovers RSS and Atom feed URLs declared in a website's HTML via link rel=alternate tags, returning an array of feed objects with URL, type, and title.

## Facts

- Endpoint: GET https://api.x402node.dev/feed/discover
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/api-x402node-dev-3858b234
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_fqmYceCfW0qfexTzcZL_Y

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 api-x402node-dev-3858b234
```

Example prompt: Find all the RSS and Atom feeds declared by The Verge's homepage at https://www.theverge.com so I can subscribe to them programmatically.

## When to prefer this

Use this endpoint when you need to programmatically discover the syndication feed URLs for any website without knowing them in advance. Ideal for agents building feed readers, podcast indexers, or content aggregators that need to subscribe to sites dynamically. Prefer this over manual feed guessing or scraping when you want structured, typed feed metadata from a single API call.

## Known failure modes

- Target URL has no link rel=alternate tags — returns empty array
- Target URL is unreachable or returns non-200 — likely returns error or empty result
- Malformed URL input — may return validation error
- Site uses JavaScript-rendered feeds not present in raw HTML — feeds not detected
- Payment not received or insufficient — 402 Payment Required

## How this service works

discover rss feed, find rss feed, rss autodiscovery, find atom feed, discover feeds from URL, rss feed finder, detect rss feed, rss feed discovery, atom feed discovery, website rss feeds, extract feed URLs, find subscribe URL. Discover RSS/Atom feed URLs declared by a website HTML link rel=alternate tags. Returns array of {url, type, title}. Use url param For AI agents subscribing to sites programmatically. Accepts payment on Base or Solana — either network works.

## Output

An array of feed objects, each containing the feed URL, MIME type (e.g. application/rss+xml or application/atom+xml), and title as declared in the site's HTML link rel=alternate tags.

## 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": {
      "url": {
       "type": "string",
       "description": "Target URL (optional)"
      }
     }
    }
   },
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/api-x402node-dev-3858b234/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.x402node.dev](https://www.zero.xyz/host/api.x402node.dev/llms.txt)