# Forms — Duplicate Value Report

> Forms — Duplicate Value Report 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).

Scans an HTML form on a given page or supplied HTML and reports duplicate values for a specified attribute across form elements

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/assistant-bx-web-forms-duplicates?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/forms-duplicate-value-report-28499f13
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_MFT2YrIeGCH19ixngtCOn

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 forms-duplicate-value-report-28499f13 -d '<json body>'
```

Example prompt: Check this page for duplicate 'id' attribute values on any form elements matching 'checkout': https://example.com/checkout — I already know 'form-email' was a duplicate before, so flag anything beyond that.

## When to prefer this

Use this endpoint when you need a lightweight, static-parse check for duplicate attribute values within HTML forms on a single page — ideal for CI/CD form audits, accessibility checks, or pre-submission HTML validation where JavaScript rendering is not required and cost must be minimal ($0.01 per check).

## Known failure modes

- URL is unreachable or returns a non-200 status — no form data extracted
- Page requires JavaScript rendering — static parser returns incomplete or empty form structure
- HTML input exceeds 100,000 character limit — request rejected
- Attribute pattern does not match schema regex — validation error returned
- No forms found on the page — empty report returned
- term or attribute_value parameters too long — truncation or rejection

## How this service works

Forms — Duplicate value report: Duplicate value report for Forms. 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 duplicate value report result.

## Output

A bounded duplicate value report identifying which form elements on the page or in the supplied HTML share the same value for the specified attribute, including any matches against previously known values, scoped to the given search term.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "url": {
   "type": "string",
   "default": "",
   "maxLength": 2048
  },
  "html": {
   "type": "string",
   "default": "<!doctype html><html><head></head><body><form id=\"sample\" data-kind=\"example\">Example product guide</form></body></html>",
   "maxLength": 100000
  },
  "term": {
   "type": "string",
   "default": "product",
   "maxLength": 100,
   "minLength": 1
  },
  "attribute": {
   "type": "string",
   "default": "id",
   "pattern": "^[a-zA-Z][a-zA-Z0-9:_-]{0,49}$",
   "maxLength": 50
  },
  "previous_texts": {
   "type": "array",
   "items": {
    "type": "string",
    "default": "",
    "maxLength": 1000
   },
   "default": [
    "Older example"
   ],
   "maxItems": 200,
   "minItems": 0
  },
  "attribute_value": {
   "type": "string",
   "default": "sample",
   "maxLength": 200
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/forms-duplicate-value-report-28499f13/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from market.datapackvibe.com](https://www.zero.xyz/host/market.datapackvibe.com/llms.txt)