# zhuanqian research API – Web Page Metadata Extractor

> zhuanqian research API – Web Page Metadata Extractor is a paid API for AI agents from research-api-production-d642.up.railway.app, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-29).

Fetches a public URL and returns structured metadata (title, author, publication date, description, word count) about the page.

## Facts

- Endpoint: GET https://research-api-production-d642.up.railway.app/paid/meta?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-29
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/zhuanqian-research-api-web-page-metadata-extractor-8b7b3778
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_NA9WBQ0vbHufwDp2qa_i3

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 zhuanqian-research-api-web-page-metadata-extractor-8b7b3778
```

Example prompt: Can you pull the metadata for this article — title, author, publish date, and word count — from https://techcrunch.com/2024/05/01/openai-new-model/?

## When to prefer this

Choose this endpoint when you need lightweight structured metadata (title, author, date, word count, description) from a public web page without needing the full article body. It is ideal for citation building, content triage, or pre-summarization checks. Prefer it over full-text extractors when you only need header-level metadata and want a fast, low-cost ($0.002 USDC) call.

## Known failure modes

- Non-public or paywalled URLs may return null for most fields
- URLs that require JavaScript rendering may yield incomplete or missing metadata
- Malformed or inaccessible URLs will return an error
- Rate limiting on free /v1/* tier; paid /paid/* tier requires valid x402 USDC payment on Base
- Private or localhost URLs will be rejected as they require a public HTTPS URL

## How this service works

Research digest (HN/GitHub/arXiv) and web page → markdown extractor. Paid x402 (USDC on Base) routes under /paid/*; free rate-limited demo under /v1/*.

## Output

A JSON object containing the page's canonical URL, title, author (or null if not found), published date (or null), word count as an integer, and a short description (or null if unavailable).

## 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",
     "required": [
      "url"
     ],
     "properties": {
      "url": {
       "type": "string",
       "description": "public https URL"
      }
     }
    }
   },
   "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",
  "title": "Example Domain",
  "author": null,
  "published": null,
  "word_count": 20,
  "description": null
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/zhuanqian-research-api-web-page-metadata-extractor-8b7b3778/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from research-api-production-d642.up.railway.app](https://www.zero.xyz/host/research-api-production-d642.up.railway.app/llms.txt)