RSS/Atom feed parser

Fetch an RSS 2.0, Atom, or RSS 1.0 feed URL and parse it into normalized JSON: feed title/description/link plus items (title, link, id, published, author, plain-text summary, categories). Send POST /api/feed-parse with the required field url and pay $0.004 per call over x402 or MPP (there is no free tier). It returns a JSON object with url, format, title, description, link and 4 more.

Deterministic pure-XML parse with a lenient recovery pass for common malformations (reported in a warnings array). Item count is bounded (default 20, max 50). SSRF-guarded.

Category: Web & documents · Tags: web rss atom feed parse monitoring news

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Parameters

Example request

curl -i -X POST https://agent402.tools/api/feed-parse \
  -H "Content-Type: application/json" \
  -d '{"url":"https://agent402.tools/changelog.xml","limit":5}'

Without payment this returns HTTP 402 Payment Required with the exact price for feed-parse; any x402 v2 or MPP client pays it and retries.

Example response

{
  "url": "https://agent402.tools/changelog.xml",
  "format": "rss2",
  "title": "Agent402 Changelog",
  "description": "Recent additions to Agent402: new tools, skill packs, framework adapters, and platform features.",
  "link": "https://agent402.tools/changelog",
  "updated": null,
  "itemCount": 36,
  "items": [
    {
      "title": "Live payments view",
      "link": "https://agent402.tools/changelog",
      "id": "agent402-changelog-2026-09-30",
      "published": "Wed, 30 Sep 2026 12:00:00 GMT",
      "author": null,
      "summary": "Item summary…",
      "categories": []
    }
  ],
  "warnings": []
}

From an MCP client

catalog.call {
  "slug": "feed-parse",
  "params": {
    "url": "https://agent402.tools/changelog.xml",
    "limit": 5
  }
}

The hosted connector at https://agent402.tools/mcp needs a payment for feed-parse; the stdio package pays it from a wallet or from AGENT402_CREDITS_KEY. Local install: npx -y agent402-mcp.

Errors and behavior

• url is required. An input the tool rejects returns an HTTP 4xx whose body carries error, tool, expected, required and example, so the caller can correct it.
• A paid call that ends in any status of 400 or above is not charged over x402, MPP or a prepaid credits key: settlement is cancelled when the tool fails. The exception is a Tempo push credential, a transfer the buyer sent before the call: it settles before the tool runs, so if the tool then fails the payment is recorded as a refund owed to the paying wallet.
• Wallet-only: this tool reaches the network or stored state, so it has no proof-of-work tier. A prepaid card-credits key issued earlier (Authorization: Bearer a402_...) also pays it.
• A GET or HEAD to /api/feed-parse returns the same 402 quote, so the price can be read without a body.
• An Idempotency-Key header makes a retried paid call replay the first 200 instead of charging again (an answer larger than 1 MB is not replayed).

Paid call (JavaScript agent)

import { wrapFetchWithPayment } from "@x402/fetch";
import { x402Client } from "@x402/core/client";
import { registerExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

const client = new x402Client();
client.setSpendControls?.(false); // keep your own spending ceiling in code
registerExactEvmScheme(client, { signer: privateKeyToAccount(KEY) });
const payFetch = wrapFetchWithPayment(fetch, client);

const res = await payFetch("https://agent402.tools/api/feed-parse", {
  method: "POST",
  headers: { "Content-Type": "application/json" },
  body: JSON.stringify({
    "url": "https://agent402.tools/changelog.xml",
    "limit": 5
  }),
});

Part of these workflows

RSS/Atom feed parser is one step in this skill pack, each sold as a single call:

• Feed watch - Monitor an RSS/Atom feed in one call: parse the feed, read the top story in full, extract the keywords driving the cycle, and diff the item list against your last run to isolate what's new.

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