web-meta
Récupère une URL publique et renvoie ses métadonnées : titre, meta description, canonical, langue, balises OpenGraph et Twitter Card, favicon, flux RSS, titres h1. Adresses IP publiques uniquement.
Point de terminaison
GET|POST https://x402-gateway.forge-x402.workers.dev/api/web-meta
Outil MCP :: web_meta
Paramètres
| Nom | Obligatoire | Type | Description |
|---|---|---|---|
url | Obligatoire | string | — |
Exemple de requête (non payée — attendre un 402)
curl -sS -D - "https://x402-gateway.forge-x402.workers.dev/api/web-meta?url=https%3A%2F%2Fen.wikipedia.org%2Fwiki%2FHTTP_402"
Exemple de défi 402
Le même objet est aussi envoyé en en-tête PAYMENT-REQUIRED en base64. Les montants sont des unités USDC atomiques (6 décimales).
{
"x402Version": 2,
"error": "Payment required",
"resource": {
"url": "https://x402-gateway.forge-x402.workers.dev/api/web-meta",
"description": "Fetch a public URL and return its metadata: title, meta description, canonical, language, OpenGraph and Twitter card tags, favicon, RSS feeds, h1s. Public IPs only.",
"mimeType": "application/json"
},
"accepts": [
{
"scheme": "exact",
"network": "eip155:8453",
"amount": "2000",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"payTo": "0x7B8bf45ac6AcbA6D4CFB626b57D3f5fF3C9C89F7",
"maxTimeoutSeconds": 120,
"extra": {
"name": "USD Coin",
"version": "2"
}
}
]
}Réessayer avec paiement
curl -sS "https://x402-gateway.forge-x402.workers.dev/api/web-meta?url=https%3A%2F%2Fen.wikipedia.org%2Fwiki%2FHTTP_402" \ -H "PAYMENT-SIGNATURE: $PAYMENT"
Exemple de réponse
{
"url": "https://example.com",
"status": 200,
"title": "Example Domain",
"description": null,
"og": {},
"feeds": []
}Démo / échantillon gratuit
La passerelle d’origine ne sert pas ?demo=1. Un échantillon étiqueté de cet outil est publié sur ce hub en fichier statique (ce n’est pas une donnée réelle, rien n’est facturé).
curl -sS "https://agent-hub.dentreprise.workers.dev/demo/web-meta.json"
Réponse de démo étiquetée
{
"demo": true,
"demo_label": "DEMO / SAMPLE — not live data. This is a labelled example response and was not charged.",
"charged": false,
"tool": "/api/web-meta",
"docs": "https://agent-hub.dentreprise.workers.dev/tools/web-meta/",
"how_to_get_live_data": "Call the live URL on the original gateway with an x402 v2 client (@x402/fetch or the Python package x402). This file is a labelled sample only.",
"sample": {
"url": "https://example.com",
"status": 200,
"title": "Example Domain",
"description": null,
"og": {},
"feeds": []
}
}JavaScript — @x402/fetch
Client officiel x402 v2. Installez @x402/fetch et @x402/evm. L’ancien nom de paquet x402-fetch est la lignée v1 obsolète et ne doit pas servir pour ces points d’accès.
import { wrapFetchWithPaymentFromConfig } from "@x402/fetch";
import { ExactEvmScheme } from "@x402/evm";
import { privateKeyToAccount } from "viem/accounts";
// Official x402 v2 client. The older package name "x402-fetch" is the deprecated v1 line.
const account = privateKeyToAccount(process.env.EVM_PRIVATE_KEY);
const fetchWithPayment = wrapFetchWithPaymentFromConfig(fetch, {
schemes: [{ network: "eip155:8453", client: new ExactEvmScheme(account) }],
});
const res = await fetchWithPayment(
"https://x402-gateway.forge-x402.workers.dev/api/web-meta?url=https%3A%2F%2Fen.wikipedia.org%2Fwiki%2FHTTP_402"
);
console.log(await res.json());Python — x402
Paquet officiel PyPI x402. Utilisez x402HttpxClient (async) ou x402_requests (sync) après register_exact_evm_client avec EthAccountSigner.
import asyncio
import os
from eth_account import Account
from x402 import x402Client
from x402.http.clients import x402HttpxClient
from x402.mechanisms.evm import EthAccountSigner
from x402.mechanisms.evm.exact.register import register_exact_evm_client
# Official PyPI package: x402
account = Account.from_key(os.environ["EVM_PRIVATE_KEY"])
client = x402Client()
register_exact_evm_client(client, EthAccountSigner(account))
async def main():
async with x402HttpxClient(client) as http:
res = await http.get("https://x402-gateway.forge-x402.workers.dev/api/web-meta?url=https%3A%2F%2Fen.wikipedia.org%2Fwiki%2FHTTP_402")
print(res.json())
asyncio.run(main())
# Sync alternative:
# from x402 import x402ClientSync
# from x402.http.clients import x402_requests
# client = x402ClientSync()
# register_exact_evm_client(client, EthAccountSigner(account))
# with x402_requests(client) as session:
# print(session.get("https://x402-gateway.forge-x402.workers.dev/api/web-meta?url=https%3A%2F%2Fen.wikipedia.org%2Fwiki%2FHTTP_402").json())Serveur MCP — forge-agent-mcp
Le mode stdio couvre tout le catalogue (les deux hôtes d’API). Clonez forge-agent-mcp et pointez votre client MCP vers src/server.mjs. Le remote Streamable HTTP hébergé sur la passerelle d’origine n’expose toujours que les outils de cette passerelle.
{
"mcpServers": {
"forge-agent-hub": {
"command": "node",
"args": ["/path/to/forge-agent-mcp/src/server.mjs"]
},
"forge-agent-api": {
"url": "https://x402-gateway.forge-x402.workers.dev/mcp",
"transport": "streamable-http"
}
}
}Wrapper d’outil LangChain
Enveloppez les mêmes clients x402 en outil LangChain avec DynamicStructuredTool (@langchain/core) ou @tool (langchain_core).
import { DynamicStructuredTool } from "@langchain/core/tools";
import { z } from "zod";
import { wrapFetchWithPaymentFromConfig } from "@x402/fetch";
import { ExactEvmScheme } from "@x402/evm";
import { privateKeyToAccount } from "viem/accounts";
const account = privateKeyToAccount(process.env.EVM_PRIVATE_KEY);
const fetchWithPayment = wrapFetchWithPaymentFromConfig(fetch, {
schemes: [{ network: "eip155:8453", client: new ExactEvmScheme(account) }],
});
export const web_meta = new DynamicStructuredTool({
name: "web_meta",
description: "Fetch a public URL and return its metadata: title, meta description, canonical, language, OpenGraph and Twitter card tags, favicon, RSS feeds, h1s.",
schema: z.object({}),
func: async (input) => {
const res = await fetchWithPayment("https://x402-gateway.forge-x402.workers.dev/api/web-meta" + "?" + new URLSearchParams(input));
return JSON.stringify(await res.json());
},
});import os
from langchain_core.tools import tool
from eth_account import Account
from x402 import x402ClientSync
from x402.http.clients import x402_requests
from x402.mechanisms.evm import EthAccountSigner
from x402.mechanisms.evm.exact.register import register_exact_evm_client
account = Account.from_key(os.environ["EVM_PRIVATE_KEY"])
client = x402ClientSync()
register_exact_evm_client(client, EthAccountSigner(account))
@tool
def web_meta() -> str:
"""Fetch a public URL and return its metadata: title, meta description, canonical, language, OpenGraph and Twitter card tags, favicon, RSS feeds, h1s."""
with x402_requests(client) as session:
return session.get("https://x402-gateway.forge-x402.workers.dev/api/web-meta").textPoints de terminaison liés
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rss-to-json
Conversion de flux RSS 2.