# Halowerk Conversion Add-to-Cart Decision

> Halowerk Conversion Add-to-Cart Decision is a paid API for AI agents from conversion.halowerk.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-11-03).

Passively fetches public evidence from a target URL and evaluates whether its add-to-cart experience meets an actionable criterion, returning a verdict, observations, thresholds, and a recommended action.

## Facts

- Endpoint: POST https://conversion.halowerk.com/v1/add-to-cart-decision?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-11-03
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/halowerk-conversion-add-to-cart-decision-8f9d0282
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_UIpW3jWXtA33Q23KKaxYB

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 halowerk-conversion-add-to-cart-decision-8f9d0282 -d '<json body>'
```

Example prompt: Check https://www.example-shop.com/product/sneakers and give me a verdict on whether their add-to-cart experience meets conversion best practices — include the evidence you found and any limitations.

## When to prefer this

Choose this endpoint when you need a fast, passive, evidence-backed verdict on a specific URL's add-to-cart experience without interacting with the site (no login, no form submission, no purchase). It is ideal for CRO audits, competitive analysis, or pre-launch checks where you want a structured observation plus a recommended action rather than raw HTML or a generic performance score.

## Known failure modes

- Target URL is unreachable or returns non-200 status — endpoint cannot fetch evidence
- Target URL requires login or is behind a paywall — passive check cannot access protected content
- Malformed or non-HTTPS URL provided — normalized domain may fail resolution
- Target page has no discernible add-to-cart element — observation may return insufficient evidence
- Rate-limiting or bot-blocking on target site — evidence fetch may be incomplete

## How this service works

Add-to-cart action decision fetches current public evidence from the supplied target and evaluates the documented criterion. It returns the observation, threshold, verdict, exact evidence source, limitations and a mode-specific action. The check is passive: no login attempt, payload injection, exploit, purchase, form submission or load test is performed.

## Output

Returns a structured assessment including: a direct observation of the add-to-cart evidence found on the target page, the threshold used for evaluation, a pass/fail or scored verdict, the exact public evidence source, known limitations of the passive check, and a mode-specific recommended action. No authentication, form submission, or purchases are performed.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "target": {
   "type": "string",
   "maxLength": 2048,
   "minLength": 3,
   "description": "Public HTTP(S) URL or domain to inspect. A bare domain is normalized to HTTPS."
  },
  "context": {
   "type": "object",
   "description": "Optional non-secret correlation labels returned unchanged only in the request lifecycle.",
   "maxProperties": 12,
   "additionalProperties": {
    "type": [
     "string",
     "number",
     "boolean",
     "null"
    ]
   }
  },
  "baseline": {
   "type": [
    "object",
    "null"
   ],
   "description": "Optional baseline returned by a previous snapshot call.",
   "additionalProperties": true
  },
  "compare_url": {
   "type": "string",
   "maxLength": 2048,
   "minLength": 3,
   "description": "Optional public comparison URL. Used by change and monitoring services."
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/halowerk-conversion-add-to-cart-decision-8f9d0282/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from conversion.halowerk.com](https://www.zero.xyz/host/conversion.halowerk.com/llms.txt)