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Definition Descriptions — Attribute Presence Check
x402
Definition Descriptions — Attribute Presence Check is a paid API for AI agents from market.datapackvibe.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-16).
Checks whether a specified HTML attribute (optionally with a specific value) is present on definition description elements matching a given term in a webpage or supplied HTML.
Price / call$0.01
Success—
StatusUnknown
How this service works
Definition descriptions — Attribute presence check: Attribute presence check for Definition descriptions. One public HTTPS page or supplied HTML; static parsing, no JavaScript rendering, login or access bypass. Specialised preset in a shared 50-profile, 20-operation engine. 0.01 USDC includes one bounded attribute presence check result.
Output
Returns a bounded result indicating whether the specified HTML attribute (and optionally a specific attribute value) is present on definition description elements that match the given term, parsed statically from the provided URL or raw HTML without JavaScript rendering.
Example use cases
Glossary page attribute audit
“Look at https://mysite.com/glossary and tell me whether the definition description for the term 'cache' has the attribute 'id' present on it.”
HTML template validation
“Here's my HTML snippet — can you check if the definition description element containing 'product' has the attribute 'data-category' set to 'featured'? <!doctype html><html><body><dd data-category="featured">product details here</dd></body></html>”
Content compliance check
“I need to verify that on https://docs.company.com/terms the definition description for the term 'warranty' has a 'lang' attribute, to make sure our accessibility standards are met.”
Technical details
Endpoint
POSThttps://market.datapackvibe.com/x402/assistant-bx-web-definition-text-attribute-presence?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a lightweight, low-cost static check specifically for the presence of HTML attributes on definition description (<dd>) elements in a document, without needing full DOM rendering or JavaScript execution. It is ideal for HTML template validation, accessibility compliance auditing, content structure verification, or automated QA pipelines that scan glossary or definition-list pages for specific attribute patterns.
Side effects
- URL is inaccessible or returns a non-200 response — check fails to retrieve page
- HTML exceeds 100,000 character limit — input rejected
- Attribute name does not match the required pattern (must start with a letter, alphanumeric/colon/underscore/hyphen, max 50 chars) — validation error
- Term not found in any definition description element — presence check returns false/absent
- Page requires JavaScript rendering to display content — static parser returns no matching elements
- URL and HTML both empty — no content to parse
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| url | string | |
| html | string | |
| term | string | |
| attribute | string | |
| previous_texts | array | |
| attribute_value | string |
Tags
x402
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