Tsoden
Public audit for apisubstack.com

Fast revenue-leak triage

apisubstack.com is 5 fixes away from more trial signups.

The site is usable but probably leaking qualified visitors because important buyer and machine-readable signals are incomplete.

Read from 5 live pages · metadata, crawlability, trust, CTA, schema, sitemap, robots, llms.txt

Questions about this audit? Reply to the email or write to us — a human answers same day.

5 fixable leaks6/8 selling signals live8/13 checks passed

The complete, prioritized plan to fix all 5 leaks above and win more trial signups — written for apisubstack.com, delivered instantly.

Book a free 30-min call See what's leaking ↓

What buyers and AI/search engines see right now

Pages checked55 read in full
How we read itRead as crawlers doSame view buyers & bots get
Response time2427msUnder the 2.5s target
Checks verified8/135 need fixing

Diagnostics

Full technical analysis

36 checks across six areas — search visibility, AI & answer engines, performance, security, conversion and trust — each measured against apisubstack.com's live site.

20 pass 7 warn 9 fail

Findability

11/12 pass · 92/100
Page title
47 chars
Pass
Meta description
130 chars
Pass
Single H1 heading
present (5/5 pages)
Pass
Heading structure (H1–H3)
H1:1 H2:2 H3:3
Pass
Canonical tag
missing
Issue
Indexable by search
indexable
Pass
Mobile viewport
set
Pass
Language declared
en
Pass
Image alt text
0/80 missing alt
Pass
Content depth
1,352 words
Pass
XML sitemap
found
Pass
robots.txt
found
Pass

AI & Answer Engines

0/5 pass · 0/100
Structured data (Schema.org)
none
Issue
FAQ / Q&A schema
missing
Issue
Open Graph (social preview)
missing
Issue
Twitter / X card
missing
Issue
llms.txt (AI summary)
missing
Issue

Performance

2/3 pass · 33/100
Server response time
2,427 ms
Warning
HTML page weight
180.9 KB
Warning
Compression (gzip/brotli)
enabled
Pass
Render-blocking scripts
1 blocking / 40 scripts
Issue
Browser caching
cache-control set
Pass

Security

2/2 pass · 54/100
HTTPS / SSL
enabled
Pass
HSTS
missing
Warning
Content-Security-Policy
missing
Warning
X-Content-Type-Options
missing
Warning
Clickjacking protection
missing
Warning
No mixed content
clean
Pass

Conversion

3/4 pass · 73/100
Clear value proposition
found: “The Posting API for authors to draft & publish!”
Pass
Primary call-to-action
found: “schedule”
Pass
Easy contact / booking
not found
Issue
Visible pricing signal
found: “Pricing”
Pass

Trust

2/3 pass · 43/100
Social proof
not found
Issue
Risk reversal
found: “free trial”
Pass
Legal / privacy pages
not found at /privacy /terms
Warning
Analytics installed
detected
Pass

Priorities

Top Leaks To Fix First

Ranked by revenue impact. Each one is something users — or an AI answer engine — need to see and currently can't. Fixing the top few moves your score the most.

01

Structured data

Add structured data (LocalBusiness / Organization schema: address, hours, phone, ratings) so search engines show you with rich results.

02

Contact or booking path

Make it easy to start a free trial from the homepage — a visible form, booking link, or tap-to-call number.

03

AI-readable llms.txt

Publish /llms.txt with a concise machine-readable product summary, audience, pricing, and docs links.

04

Trust/legal signals

Add the trust signals users look for — reviews, real cases or testimonials, credentials, and a privacy page.

05

Open Graph metadata

Add Open Graph tags so shared links render with a clear title and value proposition.

Conversion evidence

How The Page Sells

6 of 8 of the buying-decision signals we could verify are on your site today. The page already shows 6 of 8 buying-decision elements. The remaining lift is in sharpening the ones that are missing, not rebuilding the page.

Below is the breakdown: what's already working (with the exact text quoted from your page as proof), and the highest-impact additions to win more trial signups — in priority order.

Scope: an automated scan of the 5 pages we could read across your site. Every “found” item quotes the exact text on your page so you can verify it. It doesn't judge copy quality or design.

Selling well (detected, with proof)

  • Clear value proposition (headline) — found: “The Posting API for authors to draft & publish!”
  • Action-oriented primary CTA — found: “schedule”
  • Specific, quantified result — found: “12K+”
  • Risk reversal (trial / guarantee / no card) — found: “free trial”
  • Visible pricing / 'starting at' anchor — found: “Pricing”
  • Objection handling (FAQ) — found: “frequently asked questions”

Highest-impact additions to sell more

  • Social proof (testimonial / customers / rating) — Add a testimonial, customer logo, star rating, or an 'N customers' proof point near the top.
  • Easy lead-capture path — Give an easy capture path: short form, booking link, or contact route from the first screen.

Deliverable

Your complete fix pack is ready

We've already done the full work-up for apisubstack.com — every fix written out, with copy and code ready to paste. Here's what's inside:

Complete fix plan (every issue, step by step)

1. Structured data

Add structured data (LocalBusiness / Organization schema: address, hours, phone, ratings) so search engines show you with rich results.

  1. Add JSON-LD using the schema snippet below, edited with your real details.
  2. Validate it in Google's Rich Results Test before publishing.
  3. Keep it in sync with the on-page facts (name, address, phone, offers).

2. Contact or booking path

Make it easy to start a free trial from the homepage — a visible form, booking link, or tap-to-call number.

  1. Add a visible booking link, short form, or tap-to-call number on the first screen.
  2. Keep the form to 3 fields max; every extra field drops completion.
  3. Confirm submissions with a clear success state, not a silent reload.

3. AI-readable llms.txt

Publish /llms.txt with a concise machine-readable product summary, audience, pricing, and docs links.

  1. Publish /llms.txt with a plain-text product summary, audience, pricing and key links.
  2. Keep it concise — answer engines reward clear, factual structure.
  3. Update it when your offer or pricing changes.

4. Trust/legal signals

Add the trust signals users look for — reviews, real cases or testimonials, credentials, and a privacy page.

  1. Add 2–3 real testimonials or case results with names/logos near the CTA.
  2. Link a privacy policy and terms page in the footer.
  3. Show any credentials, guarantees, security or compliance badges you hold.

5. Open Graph metadata

Add Open Graph tags so shared links render with a clear title and value proposition.

  1. Add og:title, og:description, og:image and og:url to <head>.
  2. Use a 1200×630 share image with the value proposition baked in.
  3. Test the preview with the Facebook/LinkedIn debuggers.

Done-for-you assets — copy & paste

SEO title
Where to paste: Replace the <title> tag inside your page <head>.
API Substack — Effortless Posting for Authors
Meta description
Where to paste: In <head>, set <meta name="description" content="…"> to this (replace the old one).
Streamline your Substack posts with our API. Draft, publish, and schedule effortlessly. Start automating today!
H1 — main page heading
Where to paste: Make this the single <h1> at the top of the homepage (real text, not an image).
<span class="italic">The Posting API</span><br/>for authors to draft <span class="italic"…

— or one of these —
- Automate Your Substack Posting
- Effortless Drafting and Publishing
Primary CTA button
Where to paste: Use as the main button above the fold; repeat it after your proof/services section.
Get Started
JSON-LD structured data (Organization)
Where to paste: Paste this entire block right before </head> (or before </body>).
<script type="application/ld+json">
{
  "@context": "https://schema.org",
  "@type": "Organization",
  "name": "apisubstack.com",
  "url": "https://apisubstack.com/",
  "description": "API Substack provides a powerful API for Substack authors to manage their posts seamlessly.",
  "makesOffer": [
    {
      "@type": "Offer",
      "itemOffered": {
        "@type": "Service",
        "name": "Draft posts via Python SDK"
      }
    },
    {
      "@type": "Offer",
      "itemOffered": {
        "@type": "Service",
        "name": "Publish posts using CLI"
      }
    },
    {
      "@type": "Offer",
      "itemOffered": {
        "@type": "Service",
        "name": "Schedule posts with MCP"
      }
    },
    {
      "@type": "Offer",
      "itemOffered": {
        "@type": "Service",
        "name": "Integrate with Zapier for automation"
      }
    },
    {
      "@type": "Offer",
      "itemOffered": {
        "@type": "Service",
        "name": "Connect with N8N for workflow management"
      }
    }
  ]
}
</script>
llms.txt (for AI answer engines)
Where to paste: Create a plain text file at apisubstack.com/llms.txt with this content.
# apisubstack.com

> Streamline your Substack posts with our API. Draft, publish, and schedule effortlessly. Start automating today!

## Services
- Draft posts via Python SDK
- Publish posts using CLI
- Schedule posts with MCP
- Integrate with Zapier for automation
- Connect with N8N for workflow management

## Links
- https://apisubstack.com/

Page-by-page findings

PageWhat to fix
/looks healthy
/how-to-post-to-substack-via-apilooks healthy
/is-substack-have-api-for-postinglooks healthy
/how-to-post-to-substack-via-make-comlooks healthy
/how-to-post-to-substack-via-n8nlooks healthy

Action order

48-Hour Fix Plan

  • Add structured data (LocalBusiness / Organization schema: address, hours, phone, ratings) so search engines show you with rich results.
  • Make it easy to start a free trial from the homepage — a visible form, booking link, or tap-to-call number.
  • Publish /llms.txt with a concise machine-readable product summary, audience, pricing, and docs links.
  • Add the trust signals users look for — reviews, real cases or testimonials, credentials, and a privacy page.
  • Add Open Graph tags so shared links render with a clear title and value proposition.

Why it matters

The fastest users do not read every page. They scan the first screen, trust signals, pricing cues and how easy it is to start a free trial. Missing signals make the offer harder to understand and easier to ignore.

Packages

Turn this into more trial signups

You've seen the leaks. Most owners start with the €49 full report — the same fixes we'd implement for €199, written out so you can do them yourself. Want it hands-off? Step up a tier.

Do it yourselfFree

The complete evidence report and the prioritized, step-by-step plan for apisubstack.com — every fix written out with copy & code ready to paste. It is on this page. Nothing to buy, nothing to unlock.

Read the full plan ↑
Done-for-you — 48h€199

We implement the highest-impact fixes for apisubstack.com — metadata, schema, CTA, llms.txt, trust signals — in 48 hours. You keep every bit of the lift, no lock-in.

Have us do it — €199
Ongoing monitor€499/mo

Weekly re-checks of apisubstack.com + drift alerts so the fixes compound and never silently slip back.

Start monitoring

Not sure which fits? Book a free 30-min call and we'll tell you straight. · 48-hour turnaround · no lock-in · every claim verified.

Verification

Evidence Snapshot

Every signal below was read from your live site — nothing is estimated. We checked 5 pages; “couldn’t verify” means a signal needs JavaScript to read and we won’t guess.

What we read

TitleAPI Substack — Posting API for Substack authors
Meta description130 chars
H1 heading Found 5/5
Structured data Missing

Crawl & AI files

robots.txt Found
sitemap.xml Found
llms.txt (AI) Missing
Response time2427ms

Pages we checked

/
API Substack — Posting API for Substack authors
Read
/how-to-post-to-substack-via-api
How to post to Substack via API
Read
/is-substack-have-api-for-posting
Is Substack have API for posting?
Read
/how-to-post-to-substack-via-make-com
How to post to Substack via Make.com
Read
/how-to-post-to-substack-via-n8n
How to post to Substack via N8N
Read

Vragen over de bevindingen? Reply to the email, or reach us directly — we answer same day.

Email

Who we are

Tsoden — a full-service web studio

We don't just audit — we build and rank websites end-to-end. Web development & design, plus SEO & AEO, so your business shows up in Google and in AI answers like ChatGPT, Perplexity and Gemini. This report is where we start; we can implement every fix below and grow your visibility on a full-service basis.

Web development & redesign — fast, conversion-first sites
SEO — rank in Google for what your buyers actually search
AEO — get found & cited by AI answer engines (ChatGPT, Perplexity, Gemini)
Ongoing monitoring & growth — we keep it improving
Work with Tsoden →or email support@tsoden.ai

Curious how a competitor scores?

Run the same free check on any site — the same buying signals, the same evidence quoted from the page itself. About a minute, no email needed to see the result.

Disclaimer

This service is a marketing and informational tool based on public website signals. It is not legal, financial, tax, investment, security, or professional advice. Scores and recommendations are estimates, not guarantees of revenue, rankings, AI visibility, deliverability, or business outcomes. You remain responsible for reviewing, approving, and implementing any changes and for complying with laws that apply to your business.

Full disclaimer · Terms · Privacy

This audit is from 1 Aug 2026 — we re-run it fresh when you order apisubstack.com · Grade C · 56/100
Done-for-you — €199 Book a free 30-min call