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Proofline CTA Check
x402
Proofline CTA Check is a paid API for AI agents from proofline-audit.chrismellado.chatgpt.site, paid per call via x402, $0.1/call, status unknown (last checked 2026-10-18).
Analyzes a public landing page URL for conversion friction, returning a score, verdict, and prioritized repair recommendations for the call-to-action.
Price / call$0.1
Success—
StatusUnknown
How this service works
Evidence-backed product validation and SaaS conversion audits, including a fixed $250 validation sprint with reproducible, Linear-ready defects.
Output
Returns a JSON object with: an integer score (0–100), a verdict ('clear', 'friction', or 'blocked'), a summary of findings, a list of issues each with id/category/severity/evidence/repair, the highest-priority firstRepair action, and a suggestedCta text string.
Example use cases
SaaS trial page friction audit
“Run a CTA audit on https://acme.io/free-trial and tell me if there's friction blocking signups, what issues were found, and what the top repair should be.”
Pre-launch landing page validation
“Before we go live tomorrow, can you check https://launchpad.example.com for any conversion blockers or CTA problems and give me a score?”
Competitor landing page benchmarking
“Audit https://competitor.com/pricing with Proofline and tell me their friction score and verdict — I want to see how their CTA holds up.”
Technical details
Endpoint
GEThttps://proofline-audit.chrismellado.chatgpt.site/api/x402/cta-check?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a fast, evidence-backed, machine-readable audit of a single landing page's call-to-action and conversion friction — especially when you want a prioritized, Linear-ready repair list rather than generic UX advice. Prefer this over general SEO or analytics tools when the goal is specifically diagnosing CTA and conversion flow problems on a public URL.
Side effects
- Non-public or auth-gated URL returns an error or incomplete analysis
- Malformed URL input causes validation failure
- URL that times out or returns non-200 may yield partial or empty results
- JavaScript-heavy SPAs may not be fully inspectable, reducing issue accuracy
- Rate limiting or payment failure returns 402 with no audit result
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"score": 64,
"issues": [
{
"id": "placeholder-action",
"repair": "Connect the action to the real next step and verify it on mobile.",
"category": "action",
"evidence": "The primary action points to #.",
"severity": "high"
}
],
"product": "Proofline CTA Check",
"summary": "3 evidence-backed friction point(s) found; repair the highest deduction first.",
"verdict": "friction",
"firstRepair": "Replace the placeholder CTA destination with the real next step and verify it on mobile.",
"suggestedCta": "See the product in action"
}
}Tags
x402
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