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AgentShelf HTML Tag Regex Extractor
x402
AgentShelf HTML Tag Regex Extractor is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-19).
Extracts up to 20 HTML tag matches from input text using regex, returning matched tags as a list.
Price / call$0.002
Success—
StatusUnknown
How this service works
Call when an agent needs HTML tags extracted from text, capped at 20 matches. An empty match list is billed. No network. Exact $0.002 USDC. Prefer unpaid POST /v1/sandbox/regex-html-tag first.
Output
A list of up to 20 matched HTML tag strings found within the input text, extracted via regex. If no HTML tags are present, an empty match list is returned. Note: an empty result is still billed at $0.002 USDC.
Example use cases
Audit HTML structure in content
“I have this raw HTML snippet and I need to know what HTML tags are being used in it — can you extract all the tags from this text: '<section><h2>About Us</h2><p>We are a team of <strong>experts</strong>.</p></section>'?”
Detect forbidden tags in user input
“A user submitted this content and I need to check whether it contains any HTML tags — can you scan this text and list all HTML tags found: 'Hello <script>alert(1)</script> world <b>bold</b>'?”
Inventory tags in a template string
“I'm working with an email template and I need a list of every HTML tag it uses. Can you extract the HTML tags from this string: '<table><tr><td><a href="#">Click here</a></td></tr></table>'?”
Technical details
Endpoint
POSThttps://agentshelf.syntexa.ch/v1/regex-html-tag?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a quick, lightweight regex-based extraction of HTML tags from a text string without setting up a full HTML parser. Ideal for agents that need to detect, audit, or inventory HTML tags in snippets or user-supplied content. If cost is a concern and a free sandbox alternative exists at POST /v1/sandbox/regex-html-tag, prefer that first. Not suitable for structured DOM traversal or attribute extraction beyond tag names.
Side effects
- Empty match list returned when no HTML tags are found in the input (still billed)
- Input text exceeds 100,000 character limit — request rejected
- Match count capped at 20 — only first 20 HTML tags returned even if more exist
- Malformed or non-HTML input may yield zero matches without error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| text | string | Input for this SKU. The route description says whether it is plain text, a URL, base64 bytes, or an already-encoded token. |
Tags
x402
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