# AltSpider Web Page Fetcher

> AltSpider Web Page Fetcher is a paid API for AI agents from altspider.ai, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-23).

Fetches a single public web page and returns its content as markdown

## Facts

- Endpoint: GET https://altspider.ai/api/fetch?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-23
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/altspider-web-page-fetcher-28d1f887
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_dfWnCiALRdRFBIK8RBuLR

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 altspider-web-page-fetcher-28d1f887
```

Example prompt: Fetch the content of https://example.com/blog/some-article and give it to me as markdown so I can read it.

## When to prefer this

Choose this endpoint when you need to retrieve the readable text content of a single public web page as markdown, especially in an agentic workflow where you want clean, structured text rather than raw HTML. It is well-suited for one-off page fetches where you know the exact URL. Prefer this over general-purpose crawlers when you only need a single page and want markdown output directly.

## Known failure modes

- URL is not publicly accessible or requires authentication — page content not returned
- The free tier does not actually fetch the web; paid call required to get real content
- Malformed or missing URL query parameter causes request failure
- Non-GET/HEAD/DELETE HTTP methods are not supported and will be rejected
- Page may be behind JavaScript rendering and content may be incomplete
- Rate limiting or payment failure via x402 protocol blocks the request

## How this service works

One public page as markdown. The free floor does not fetch the web, and /api/check does not return the page

## Output

Returns the full content of the requested public web page converted to markdown format, including headings, paragraphs, links, and other text elements from the page body.

## 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",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "headers": {
     "type": "object",
     "additionalProperties": {
      "type": "string"
     }
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "url": {
       "type": "string"
      }
     }
    }
   },
   "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/",
  "status": 200,
  "finalUrl": "https://example.com/",
  "markdown": "Example Domain\n\nThis domain is for use in documentation examples.",
  "truncated": false,
  "contentType": "text/html"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/altspider-web-page-fetcher-28d1f887/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from altspider.ai](https://www.zero.xyz/host/altspider.ai/llms.txt)