URL Metadata Extractor
Fetch a public HTTP(S) page with private-network blocking and extract its title, description, Open Graph image, status, and content type.
Preview request
The preview path is rate-limited and does not charge. It executes the live source and returns the paid response shape while withholding decision-ready values. Production requests use the same parameters and return a standard x402 challenge when no payment signature is present.
curl --request GET \ "https://ai-data-marketplace-1042299154756.us-central1.run.app/api/v1/url_metadata?preview=true&url=https%3A%2F%2Fgithub.com"
Input contract
| Parameter | Type | Required | Description |
|---|---|---|---|
url | string | Yes | The URL to extract metadata from. |
Example deliverable
This is the documented response shape, not a promise that live values will match the example. The paid request returns current or declared-source results using the same contract.
{
"success": true,
"source": "live public web fetch",
"fetched_at": "2026-08-07T07:32:39.578Z",
"url": "https://github.com/",
"status_code": 200,
"content_type": "text/html; charset=utf-8",
"title": "GitHub · Change is constant. GitHub keeps you ahead. · GitHub",
"description": "Join the world's most widely adopted, AI-powered developer platform where millions of developers, businesses, and the largest open source community build software that advances humanity.",
"og_image": "https://images.ctfassets.net/8aevphvgewt8/4pe4eOtUJ0ARpZRE4fNekf/f52b1f9c52f059a33170229883731ed0/GH-Homepage-Universe-img.png",
"marketplace_metadata": {
"data_mode": "live_source",
"billable": true,
"availability": "operational",
"source": "live public web fetch"
}
}Purchase decision
Buy when: the active task needs this product's structured result, its declared source and freshness are sufficient, and 0.003 USDC is within the buyer's authorized per-request limit.
Skip when: a cached result is sufficient, the source or fields do not satisfy the task, or the buyer has not authorized payment. Do not bypass wallet, budget, or user-approval policy.
Guaranteed response metadata
Every successful product response identifies how the result was produced. Product-specific output fields are documented in the paid OpenAPI contract. The preview proves the live source and field types without returning the paid values.
{
"marketplace_metadata": {
"data_mode": "live_source",
"billable": true,
"availability": "operational",
"source": "live public web fetch"
}
}Agent payment flow
Fast path: install the public MCP package, configure a dedicated low-balance Base buyer wallet and a maximum per-request spend, then call this tool with auto_pay: true. The client handles the challenge, local signature, settlement, and retry in one tool call.
npx -y dopaminedesk-ai-data-marketplace-mcp
X402_AUTO_PAY=true
X402_EVM_PRIVATE_KEY=<dedicated buyer wallet key>
X402_MAX_PAYMENT_USDC=0.25
tool input: { "auto_pay": true }Manual path: request the product, read the base64 PAYMENT-REQUIRED challenge, sign with any compatible x402 v2 client, and retry with PAYMENT-SIGNATURE. A successful response includes PAYMENT-RESPONSE.