Tradingcalc
Free, instant trading calculators across options, forex, risk and statistics, prediction markets, on-chain safety, and crypto futures with live prices from 17 exchanges, plus a free API & MCP server for AI agents. No signup.
What we found
- Analytics set tracking cookies before any opt-in, and we found no consent manager.
- It sends three of the six security headers we check; Referrer-Policy is among those missing.
- Built with Next.js and React, the site is hosted on Vercel.
- It welcomes AI crawlers and publishes an llms.txt.
Built with: 16 technologies · Indie stack
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For light pages
<a href="https://firstsited.com/launch/3cyaxs61/tradingcalc-1"><img src="https://firstsited.com/badge/3cyaxs61/stack.svg" alt="Tradingcalc tech stack on FirstSited" height="28"></a>
For dark pages
<a href="https://firstsited.com/launch/3cyaxs61/tradingcalc-1"><img src="https://firstsited.com/badge/3cyaxs61/stack.svg?theme=dark" alt="Tradingcalc tech stack on FirstSited" height="28"></a>
How it fits together
Each technology runs on, or extends, the one it sits under.
| Technology | Type |
|---|---|
| Infrastructure | |
Namecheap DNS
|
DNS |
Vercel
|
Hosting |
| HSTS | Security |
Zoho Mail
(2)
|
Business email |
Namecheap Email Forwarding
|
Email forwarding |
Brevo
(2)
|
Email marketing |
Resend
|
Transactional email |
| Build & Framework | |
Tailwind CSS
|
CSS framework |
React
(2)
|
Framework |
Next.js
(6)
|
Meta-framework |
Lucide Icons
|
UI library |
| Analytics & Marketing | |
Google Analytics
(5)
|
Analytics |
PostHog
(5)
|
Analytics |
Google Search Console
|
SEO |
Google Tag Manager
(3)
|
Tag management |
| Business Tools | |
Sentry
(2)
|
Error tracking |
Each technology links to its own page: which other new sites launched with it.
Site checks
| Custom title and meta description | |
| Open Graph tags (title, image, description) | |
| Twitter card meta tags | |
| Canonical URL declared | |
| Responsive viewport meta tag | |
| Favicon present | |
| Semantic HTML (nav, main, article) | |
| Page title is 66 characters Google only shows about 60 characters of the title in search results; aim for 50–60 to keep the whole thing visible. | |
| Meta description is 269 characters Google only shows about 155–160 characters of the description in desktop search results (less on mobile); anything past that won't appear. |
| Referrer-Policy | |
| X-Frame-Options | |
| Permissions-Policy experimental | |
| X-Content-Type-Options | |
| Content-Security-Policy | |
| Strict-Transport-Security | |
| X-XSS-Protection deprecated, not counted |
| Privacy policy /privacy | |
| Terms of service /terms | |
| Consent manager not detected; analytics set tracking cookies on our visit with no opt-in step |
Mentions: Cookies, Updated: OCTOBER 28, 2026
| robots.txt | |
| sitemap.xml 319 URLs | |
| security.txt | |
| llms.txt | |
| ads.txt | |
| humans.txt optional |
| llms.txt published | |
| No AI bots blocked in robots.txt | |
| Content-Signal none declared | |
| Link headers none advertised |
| State | Record | Status |
|---|---|---|
| SPF ~all | Soft-fail (~all), common and accepted | |
| DMARC p=quarantine | Quarantine | |
| DKIM | Found | |
| MTA-STS | Not deployed | |
| TLS-RPT | Not configured |
Hosting and network
| Network | AMAZON-02 - Amazon.com, Inc., US AS16509, US |
|---|---|
| DNS | Namecheap DNS authoritative nameservers |
| DNSSEC | Not enabled DNS answers are unsigned |
| Certificate | Let's Encrypt valid 10 Nov 2026 to 8 Feb 2027, as captured |
| Green hosting | No record per The Green Web Foundation |
| Page build | 27 JS files, 2 CSS files 7 third-party domains, code splitting |
| Brand colours |
Storage: 8 items
| Name | Lifetime | Set by |
|---|---|---|
| ph_phc_MVsnsThcOBuRhQTahsH5D8bhGdhBPRTO2Uz8UMfiRQ7_posthog | 12mo | - |
| _ga | 1y | Google Analytics |
| _ga_8KHZW74CGP | 1y | Google Analytics |
| Key | Size | Set by |
|---|---|---|
| ph_phc_MVsnsThcOBuRhQTahsH5D8bhGdhBPRTO2Uz8UMfiRQ7_posthog | 1.4 KB | PostHog |
| Key | Size | Set by |
|---|---|---|
| ph_phc_MVsnsThcOBuRhQTahsH5D8bhGdhBPRTO2Uz8UMfiRQ7_posthog | 90 B | PostHog |
| ph_phc_MVsnsThcOBuRhQTahsH5D8bhGdhBPRTO2Uz8UMfiRQ7_primary_window_exists | 4 B | PostHog |
| ph_phc_MVsnsThcOBuRhQTahsH5D8bhGdhBPRTO2Uz8UMfiRQ7_session_registered_properties | 74 B | PostHog |
| ph_phc_MVsnsThcOBuRhQTahsH5D8bhGdhBPRTO2Uz8UMfiRQ7_window_id | 38 B | PostHog |
Performance
| Measure | This site | Reading |
|---|---|---|
| Server response | 413 ms | good, faster than 34% of sites |
| Largest contentful paint | 8,560 ms | slow |
| Layout shift | 0.00 | good |
| Page weight | 1.4 MB | fair |
| Image weight | 82 KB | light |
| Images | 18 | 13 larger than shown, 1 without width and height, 14 without alt text |
| Third-party domains | 7 | |
| Console errors | 0 | none |
| Failed requests | 0 | none |
From a single automated render of the home page. A quick guide, not a substitute for Lighthouse or field data. How we measure
Notes
-
Looks AI-built: few AI signals.
How much the site looks AI-generated. It is a pattern match shown for interest, not a verdict.
Which signals fired
Signal Points AI onboarding signals +5 AI stack signals +10 - Analytics set tracking cookies on our visit and no consent manager was detected. UK and EU GDPR require opt-in before tracking runs, and more than 20 US states require honouring opt-out requests.
- Performance comes from one render on 11 November 2026 and will vary between visits.
How we know
FirstSited records what new websites are built with, usually within a day of going live. Most we find ourselves, by watching public internet infrastructure for brand-new sites; the rest come from Product Hunt, Hacker News and PeerPush. We checked this one in full: its tech stack, DNS, security headers and page basics. This page is what we saw on 11 November 2026; the live site may have changed since.
Every technology below links to its own page: which other new sites launched with it. Watch any of them and get every new site that uses it as it goes live, from £15 a month.