# AgentShelf Profile Meta Charset Extractor

> AgentShelf Profile Meta Charset Extractor is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-11).

Extracts meta charset values from a public URL or raw HTML string, with SSRF protection.

## Facts

- Endpoint: POST https://agentshelf.syntexa.ch/v1/profile-meta-charset?utm_source=zero.xyz
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-11
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/agentshelf-profile-meta-charset-extractor-54eaf95d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_lzUkApQJhFJ0TazBzaxyC

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 agentshelf-profile-meta-charset-extractor-54eaf95d -d '<json body>'
```

Example prompt: Can you extract the meta charset value declared in the HTML of https://example.com for me?

## When to prefer this

Choose this endpoint when you need to programmatically determine the character encoding declared in a webpage's meta charset tag, either by providing a public URL (SSRF-safe fetch) or raw HTML. Prefer the free sandbox endpoint (/v1/sandbox/profile-meta-charset) for testing or low-volume use before paying $0.005 USDC per call.

## Known failure modes

- URL is unreachable or returns non-200 status — extraction fails
- No meta charset tag present in the HTML — returns empty or null result
- SSRF-blocked URL (private IP ranges, localhost) — request rejected for security
- HTML input exceeds 200,000 character limit — request rejected
- URL shorter than 8 characters or longer than 2048 — validation error
- Malformed HTML with no parseable head section — charset cannot be extracted

## How this service works

Call when an agent needs meta charset values extracted from a public page or HTML (SSRF-safe). Send JSON fields html (string). Exact $0.005 USDC on Base. Try unpaid POST /v1/sandbox/profile-meta-charset first.

## Output

Returns the character encoding value declared in the HTML page's meta charset tag (e.g. 'UTF-8', 'ISO-8859-1'), parsed either from a fetched public URL or a provided raw HTML string.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "url": {
   "type": "string",
   "maxLength": 2048,
   "minLength": 8,
   "description": "Public page to fetch. The selector or profile is fixed by the SKU. Provide url or html."
  },
  "html": {
   "type": "string",
   "examples": [
    "<!doctype html><html lang=\"en\"><head><title>Hello</title>\n<meta name=\"description\" content=\"Desc\"><meta property=\"og:title\" content=\"OG\">\n<link rel=\"canonical\" href=\"https://example.com/\"><link rel=\"icon\" href=\"/favicon.ico\">\n</head><body><h1>Hello</h1><a href=\"https://example.com/a\">A</a></body></html>"
   ],
   "maxLength": 200000,
   "minLength": 1,
   "description": "HTML to extract from locally. Provide html or url. When both are set, html is used."
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/agentshelf-profile-meta-charset-extractor-54eaf95d/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agentshelf.syntexa.ch](https://www.zero.xyz/host/agentshelf.syntexa.ch/llms.txt)