Page metadata

Fetch page metadata for a URL: title, description, OpenGraph, Twitter cards, canonical URL, favicon. Send GET /api/meta with the required field url and pay $0.002 per call over x402 or MPP (there is no free tier). It returns a JSON object with url, title, description, canonical, og and 1 more.

Category: Web & documents · Tags: metadata opengraph seo

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Parameters

Example request

curl -i "https://agent402.tools/api/meta?url=https%3A%2F%2Fagent402.tools"

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

Example response

{
  "url": "https://agent402.tools/",
  "title": "Agent402: 500+ pay-per-call tools for AI agents over x402 and MPP",
  "description": "Agentic Finance for AI agents: 500+ pay-per-call tools, metered models and finished reports over x402 and MPP, or by card.",
  "canonical": "https://agent402.tools/",
  "og": {
    "type": "website",
    "site_name": "Agent402",
    "title": "Agent402: 500+ pay-per-call tools for AI agents over x402 and MPP"
  },
  "twitter": {
    "card": "summary_large_image"
  }
}

From an MCP client

catalog.call {
  "slug": "meta",
  "params": {
    "url": "https://agent402.tools"
  }
}

The hosted connector at https://agent402.tools/mcp needs a payment for meta; 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 POST with a JSON body to /api/meta is served as this GET, with the body as the input.
• 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/meta?url=https%3A%2F%2Fagent402.tools");

Part of these workflows

Page metadata is one step in these 6 skill packs, each sold as a single call:

• Content extraction - Turn arbitrary URLs and PDFs into clean structured text - articles, page metadata, PDF pages, OCR'd images, browser-rendered SPAs.
• Link preview card - The 'turn a URL into a card-shaped preview' workflow. Pull OpenGraph/Twitter card metadata, fetch the article body as a description fallback, normalize the og:image into a standard 1200×630 social card variant and a 400×400 square thumbnail, and extract URL/mention entities from the body for related-link surfacing. Five tools, one structured card payload ready for chat embeds, social shares, or RSS-to-card pipelines.
• Technical SEO audit - Can search engines and AI crawlers actually index this page? One pass over reachability, TLS, robots policy, sitemap health, meta/OpenGraph tags, and the on-page link graph.
• Competitor scan - What's a competitor using? Tech stack, HTTP headers, WHOIS, and page metadata in one call.
• Page audit - Full page SEO + security audit: content extraction, metadata, HTTP headers, robots policy, and sitemap health in one call.
• URL inspector - Quick URL health and metadata check - parse the URL structure, verify reachability, and pull page metadata in one pass.

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