4-hour starter checkFor SaaS websites

Find the friction.
Earn the next click.

Send one public URL. Get visible evidence around one CTA and one exact repair, with a four-hour target and a fixed $10 scope.

  • $10fixed starter scope
  • 4htarget delivery
  • 0logins required

Built for what can be verified

Visible evidenceExact repairsMobile realityClear boundaries

Recent validation case

Four defects.
107 passing tests.

A clean-environment Windows review turned reproducible onboarding failures into a focused compatibility patch and a fully passing regression suite.

04
confirmed defects
10
files in the patch
107/107
tests passing

AI-agent assisted. Every reported defect remained independently reproducible; hypotheses and untested behavior were not presented as facts.

Proofline evidence-first product validation case with four confirmed defects, 107 of 107 tests passing, and a 10-file compatibility patch
Clean environment → root cause → minimal patch → regression proof

The deliverable

Not more opinions.
A repair sequence.

Every finding connects a visible symptom to a user consequence, an exact change, and a priority.

01

Message clarity

Find where the page fails to name the buyer, explain the value, distinguish the offer, or make the next step obvious.

02

Trust and proof

Separate supported claims from empty confidence. Place evidence, boundaries, and risk answers where hesitation actually happens.

03

Interaction and mobile

Check forms, CTAs, links, error states, touch targets, and the small-screen journey—not only a polished desktop screenshot.

04

Exact repair order

Every finding receives evidence, a concrete change, and an impact/effort priority so the next work session starts with a decision.

Free directional screen

Eight checks.
Three minutes.

Answer from the page as it exists today. The result highlights the first visible gaps; it does not pretend to predict revenue.

01

Specific first promise

The first headline names the buyer, the problem, and the concrete outcome.

02

One obvious next step

A qualified visitor can identify the primary action without choosing between competing CTAs.

03

Proof beside the claim

Specific evidence, a source, or a product example appears close to the promise it supports.

04

Risk answered before the ask

The page resolves the biggest trust, setup, privacy, pricing, or switching objection before conversion.

05

Mobile path stays clear

Key copy, controls, forms, and the primary CTA remain readable and usable on a small screen.

06

Forms earn every field

The conversion form asks only for information needed at this stage and explains unusual requests.

07

Offer boundaries are visible

Visitors can tell what is included, what happens next, and what the offer does not promise.

08

Interaction survives reality

Links, validation, error states, loading, and keyboard or touch behavior work as expected.

Illustrative sample

From vague page
to clear evidence.

This is a fictional example of the output structure—not a fabricated client result.

BEFORE / INPUT01
acme.example/platform
H1

Transform your workflow with the power of AI

Our innovative platform helps modern teams work smarter, move faster, and unlock their potential.

Book a demo
  • ! Category and buyer are unclear
  • ! Claims have no evidence
  • ! CTA arrives before value
AFTER / DELIVERABLE02
IMPLEMENTATION-READY COPY
REWRITTEN H1

Turn support conversations into cited product answers.

For B2B product teams: connect approved docs, surface source-backed answers, and review every response before it reaches customers.

See a sourced answer
  • Category, buyer, and outcome named
  • Mechanism and trust control explained
  • CTA previews the actual value

The method

Four passes.
One fix order.

  1. PASS 01Frame

    Confirm the primary audience, conversion action, traffic context, and boundaries.

  2. PASS 02Inspect

    Review message, proof, interaction, mobile behavior, and the points where confidence drops.

  3. PASS 03Repair

    Write the exact copy, interface, or sequence change needed for the highest-priority issues.

  4. PASS 04Verify

    Recheck the evidence, rank impact and effort, and package the next actions without inflated claims.

Six fixed scopes

Start where the
friction lives.

Start with one $10 CTA repair, choose product validation, inspect one page or journey, or run a deeper launch review. Every package has a hard boundary and a usable deliverable.

2-day target

Product Validation Sprint

Staging releases and critical product flows

$250USD · FIXED

A focused validation pass that turns reproducible failures into evidence-backed, Linear-ready defects.

  • One critical product flow
  • Desktop and mobile validation
  • Reproducible evidence
  • Linear-ready defect reports
  • Retest notes for supplied fixes
Start Product Validation Sprint View or contract through Contra
12h target

Rapid Evidence Check

A low-risk first proof

$39USD · FIXED

A compact inspection of one public page, built to expose the first fixable friction without commissioning a full audit.

  • One public URL
  • Desktop and mobile spot-check
  • Up to five prioritized findings
  • Annotated proof for the top issues
  • Exact repair recommendations
Start Rapid Evidence Check Start directly without an account
24h target

Signal Scan

One high-stakes page

$79USD · FIXED

A fast, evidence-backed read of the page most responsible for the next click.

  • One URL or screen
  • Desktop + mobile review
  • Up to 10 prioritized findings
  • Annotated evidence
  • Three exact copy repairs
Start Signal Scan View or contract through Contra
48h target

Funnel Sprint

A short conversion journey

$149USD · FIXED

Follow the visitor from promise to action and expose the friction between pages.

  • Up to five URLs or screens
  • Cross-page consistency
  • Up to 20 prioritized findings
  • Copy and interaction repairs
  • 90-minute fix sequence
Start Funnel Sprint View or contract through Contra
72h target

Evidence Audit

Launches and redesigns

$379USD · FIXED

A deeper audit with implementation checks for the highest-impact repairs.

  • Up to ten URLs or screens
  • Up to 35 prioritized findings
  • Exact copy rewrites
  • Impact / effort / confidence
  • Top-ten acceptance checks
Start Evidence Audit View or contract through Contra
Clear boundaries

Not included: implementation, analytics setup, paid media, legal certification, guaranteed lifts, or an open-ended retainer. Those require a separate scope after the audit.

Choose the contracting route

Use Contra for a familiar project and payment workflow. Native USDC on Base remains available for an invoice agreed in the private thread.

For coding agents / x402

Diff risk check. $0.25 per review.

Send a bounded unified diff and receive redacted line evidence, severity counts, a risk score, and one prioritized repair queue. The submitted code is inspected as text and is never executed.

Read the diff-review contract
For launch agents / x402

Multipage launch risk check. $2.00 per report.

Send one to three public pages and receive page-level evidence, cross-page action and trust checks, and one ranked repair queue. Payment settles on Base only after the complete report is produced.

Read the launch-risk contract
For autonomous agents / x402

Evidence-first CTA check. $0.10 per call.

Send one public URL and receive a structured score, quoted page evidence, the highest-priority repair, and suggested CTA copy. Payment settles on Base only after a valid audit is produced.

Read the API contract
For x402 sellers / interoperability

x402 readiness check. $0.05 per call.

Send one public endpoint and receive transport, payment-option, resource-metadata, and Bazaar discovery evidence. The check makes one unpaid request and never pays the inspected endpoint.

Read the readiness contract
For autonomous workers / x402

Proofline Funded Task Scan. $0.10 per scan.

Conservatively scan eight public reward markets for actionable work. TaskMarket escrow is independently verified when suitable on-chain evidence is available, while unverified opportunities stay clearly separated for review.

Read the funded-task contract

Start without an account

Send the URL.
Get a fix order.

Describe the page or journey. A private project thread is created instantly so replies and scope can stay in one place—no inbox, login, or social account required.

  • 01 Fixed scopes starting at $10
  • 02 First response within 24 hours
  • 03 Contra or direct USDC after scope approval

Choose a fixed package or send the journey and Proofline will recommend the smallest useful scope.

No signup. No mailing list. AI-agent assisted; every finding is independently reproduced before delivery.

Questions, plainly answered

Before you
book.

01Do you guarantee a conversion lift?

No honest audit can guarantee a numerical lift without controlled traffic and experimentation. The deliverable is a concrete, prioritized evidence report with clearly stated confidence—not invented certainty.

02Do you need analytics or admin access?

No for the core audit. A public page, staging link, or supplied screens are enough. If supporting data is shared, it is used only within the agreed scope.

03Will you implement the fixes?

Not in these fixed packages. The report is designed for a designer, copywriter, or developer to implement. A separate implementation scope can follow.

04Is this a legal or accessibility certification?

No. The audit can identify visible usability and accessibility friction, but it is not legal compliance certification.