# unprice RSS/Atom Feed Discovery API

> unprice RSS/Atom Feed Discovery API is a paid API for AI agents from volkov.evgeny.m2.fvds.ru, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-11).

Discovers RSS and Atom feed URLs for a given webpage URL, returning feed links with their types

## Facts

- Endpoint: GET https://volkov.evgeny.m2.fvds.ru/pay/feeds?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-11
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/unprice-rss-atom-feed-discovery-api-292232e4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_fOc7TFp5a1OH-F3JTgeHa

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 unprice-rss-atom-feed-discovery-api-292232e4
```

Example prompt: Can you find all the RSS or Atom feeds available on https://example.com so I can subscribe to their latest content?

## When to prefer this

Use this endpoint when you need to auto-discover syndication feed URLs (RSS/Atom) for any given webpage without manually parsing HTML. Prefer this over manual scraping when you need a lightweight, pay-per-call solution that handles feed link extraction for you, especially in agent workflows that aggregate multiple news or content sources dynamically.

## Known failure modes

- URL not found or unreachable — returns empty feeds array or error
- No feeds present on the page — returns count: 0 with empty feeds array
- Invalid or malformed URL input — request may fail or return error
- Payment of 0.002 USDC on Base not fulfilled — HTTP 402 returned before feed data

## How this service works

Tiny paid web services for agents. Pay per request with USDC on Base via x402, plus non-x402 Base USDC tx-hash checkouts for Merchant Feed Audit, Base USDC receipts, and recent wallet statements.

## Output

A JSON object containing the queried URL, the count of discovered feeds, and an array of feed objects each with an href (feed URL) and type (e.g. application/rss+xml or application/atom+xml).

## 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"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "url": "https://example.com",
  "count": 1,
  "feeds": [
   {
    "href": "https://example.com/feed.xml",
    "type": "application/rss+xml"
   }
  ]
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/unprice-rss-atom-feed-discovery-api-292232e4/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from volkov.evgeny.m2.fvds.ru](https://www.zero.xyz/host/volkov.evgeny.m2.fvds.ru/llms.txt)