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Security report for weatherstack.com

apilayer · Technology · N/a

Medium risk. 4 critical or high findings in Security headers, GDPR outside view and 1 other check.

Security score

71/100

Risk levelMedium

0–100, higher is better. How it is calculated

weatherstack.com is a well-established weather data API provider offering real-time, historical, and forecast weather information globally. The company operates under the parent brand apilayer and serves a broad developer and business audience with a freemium API model. The website demonstrates a high level of professionalism, with clear service descriptions, client logos, and comprehensive documentation. Technically, the site uses modern JavaScript libraries, Google Tag Manager, Mixpanel analytics, and Stripe for payments, hosted behind Cloudflare DNS. Security posture is strong with HTTPS enforced and domain status locks, though DNSSEC is not enabled and explicit security policies are not publicly published. Privacy compliance is good with visible privacy and cookie policies and consent mechanisms. Overall, the site is trustworthy, performant, and well-optimized for mobile and SEO.

Scanned

NIS2 and GDPR posture

GDPR outside view
73/ 100 · Medium
Checks completed
7of 7

NIS2 Art. 21(2)

  1. (a) Risk analysis and security policies: Not visible from outside
  2. (b) Incident handling: One indicator
  3. (c) Business continuity, backups and crisis management: Not visible from outside
  4. (d) Supply chain security: Not visible from outside
  5. (e) Secure acquisition, development and maintenance, including vulnerability handling: Partly checked
  6. (f) Assessing the effectiveness of security measures: Not visible from outside
  7. (g) Cyber hygiene and security training: Not visible from outside
  8. (h) Cryptography and encryption: Partly checked
  9. (i) HR security, access control and asset management: One indicator
  10. (j) Multi-factor authentication and secured communications: Not visible from outside

This scan rated NIS2 with an earlier keyword method that is no longer shown; rescan for the per-article view. Risk management, continuity, supply chain, training, MFA, management oversight (Art. 20) and incident reporting (Art. 23) need internal evidence, and Guard cannot tell whether NIS2 applies to this organisation.

GDPR is indicative only, based on publicly visible signals: Articles 7, 12, 13 and 32 of Regulation (EU) 2016/679 and Article 5(3) of the ePrivacy Directive. Not a certification or legal assessment.

Priority findings

4 findings rated critical or high. Fix these first.

  1. Security headers

    Security headers are instructions your web server sends to every visitor’s browser. Missing ones leave visitors more exposed to attacks such as clickjacking and injected scripts.

    • High

      Missing Strict-Transport-Security header

      Forces HTTPS connections

      What to do: Add "Strict-Transport-Security: max-age=31536000; includeSubDomains; preload"

      • CWE-319
      • OWASP A04:2025
      • ASVS V3.4.1
    • High

      Missing Content-Security-Policy header

      Controls resources the browser is allowed to load

      What to do: Implement a Content-Security-Policy appropriate for your application

      • ASVS V3.4.3
      • OWASP Secure Headers: OWASP Secure Headers Project recommends Content-Security-Policy: default-src 'self'; form-action 'self'; base-uri 'self'; object-src 'none';…
  2. GDPR outside view

    These are the privacy signals visitors and data protection authorities look for under GDPR.

    • High

      No Cookie Consent Banner found

      GDPR requires explicit consent for non-essential cookies

      What to do: Implement a cookie consent banner that appears on first visit

  3. SSL/TLS

    TLS encrypts the connection and proves the site is really yours. Weak or expiring certificates trigger browser warnings and put traffic at risk.

    • High

      Weak SSL Key Length

      SSL certificate uses 256-bit key, which is considered weak

      What to do: Use at least 2048-bit RSA or 256-bit ECC key

      • CWE-326
      • OWASP A04:2025
      • Mozilla TLS: Mozilla Server Side TLS 6.0 intermediate: rsa_key_size 2048

Need hands-on remediation? Email guard@offseq.com

Keep watching weatherstack.com

This scan found 20 issues across 6 checks. Monitoring re-runs those checks daily, emails you when something material changes and records each fix, so you can show progress.

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  • TLS certificates and expiry
  • DNS records
  • SPF, DKIM and DMARC
  • Security headers
  • GDPR and NIS2 posture
  • Exposed services
  • Third-party trackers
  • Security score drift

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Results by check

Each check with its score, findings and the evidence it collected.

How this score is calculated

The security score runs 0–100, higher is better. It is the plain average of the security checks that completed in this scan, each counted equally. A check that could not run is left out: it counts neither as a pass nor as a fail.

Counted in this score

SSL/TLS
75
Security headers
35
Email security
60
DNS health
80
Network security
100
GDPR outside view
73
Average
71

Not counted

  • NIS2 outside view: Re-weights evidence from the TLS, email, DNS, network and hygiene checks, so counting it would count that evidence twice. Shown on its own.
  • OffSeq Observations: An AI reading of the site, useful context but not reproducible evidence. Shown on its own.

Findings that cap the score at 49

Each of these is serious on its own, so while any is present the site cannot rate better than high risk, however good the other checks are.

  • The certificate is not trusted by browsers
  • The website is not served over HTTPS
  • A database, remote desktop, file-sharing or Telnet service is reachable from the internet
  • The page loads a script from a compromised source
  • The domain registration has expired
  • SPF authorises every server to send mail as the domain

Partial scans

When the site blocks Guard or most checks cannot run, the score covers only the checks that ran (usually DNS and email), is capped at 75 and is shown as partial, without a risk level.

Risk levels

  • Critical0–25
  • High26–49
  • Medium50–75
  • Low76–100

Breach exposure

Leaked credentials and lookalike domains from OffSeq Breach. The counts are free; the detailed lists are paid add-ons.

Dark web exposure

Add-on

Leaked records that mention weatherstack.com, from OffSeq Breach.

Total records
6,529
Employees
0
Customers
6,529
Third parties
0
Weak passwords
12%

4 subdomains affected

See the 10 newest leaked credentials

A one-off add-on to this report that lists the most recent identifier and password pairs OffSeq Breach holds for weatherstack.com.

Select it in the checkout above.

Breach keeps ingesting new leaks, so these numbers can grow between scans.

Technical appendix

Business context, site observations and technical notes gathered during the scan, and the standards behind each reference.

Business context

Business profile

The business targets developers and enterprises needing accurate weather data integration, leveraging a subscription-based API service model. It has a solid market position with over 75,000 customers and notable clients like Microsoft and Deloitte. The company benefits from a strong partnership ecosystem under apilayer, which operates multiple API services. Revenue streams include tiered API plans and enterprise offerings. The website's marketing and analytics tools indicate a mature digital marketing strategy. The absence of direct contact emails or phone numbers suggests a focus on digital self-service and support via forms.

Security posture

The website enforces HTTPS with a valid SSL certificate and uses domain status locks to prevent unauthorized changes. It employs reCAPTCHA for form protection and integrates security-focused headers implicitly. However, DNSSEC is not enabled, which is a recommended improvement. No public security policy or incident response contacts are found, which could be enhanced to improve transparency and trust. No vulnerabilities or exposed sensitive data were detected in the HTML content. Overall, the security posture is solid but could benefit from additional published policies and DNS security enhancements.

Recommendations

  1. Enable DNSSEC on the domain to improve DNS security and prevent spoofing.
  2. Publish a dedicated security policy page and provide incident response contact information.
  3. Add explicit security headers such as X-Frame-Options and X-Content-Type-Options if not already set at server level.
  4. Consider publishing a vulnerability disclosure or security.txt file to encourage responsible reporting.
  5. Maintain transparency on data retention and privacy practices to enhance GDPR compliance visibility.

Contact details published on the site

Addresses
Legal name
apilayer
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
apilayer
Description
weatherstack provides real-time, historical, and forecast weather data worldwide via a REST API.
Key services
Real-Time Weather API, Historical Weather API, Weather Forecast API, Location Autocomplete, Bulk API Endpoint, Marine API Endpoint
Content quality
excellent
Branding
consistent

Technology

Stack
JavaScript, Google Tag Manager, Mixpanel, Stripe, Cloudflare DNS
Performance
fast
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • No exposed sensitive data in HTML
  • Use of reCAPTCHA
  • Client-side input validation
  • Domain status includes clientDeleteProhibited etc.

Analytics and tracking

Services
Google Analytics, Mixpanel, Microsoft Clarity
Tracking level
moderate
Privacy practices
good

Advertising

Ad networks
Bing Ads
Tracking pixels
Microsoft Clarity, Mixpanel, Reddit Pixel
Marketing tools
Mixpanel
Transparency
good

Site quality

Design
excellent
User experience
excellent
Content relevance
excellent
Navigation
excellent
Professionalism
excellent
Trustworthiness
high

Key observations

  1. Website is professionally designed and well maintained.
  2. Clear API service offerings with detailed documentation.
  3. Strong brand presence with known clients displayed.
  4. Good use of modern web technologies and analytics.
  5. No signs of malicious or suspicious activity.
  6. No direct contact emails or phone numbers publicly listed; contact via form.
  7. No explicit security policy or incident response contacts published.
  8. No DNSSEC enabled; recommended for improved DNS security.
Technical notes

Notes

The website is built with a custom CMS or framework, leveraging modern JavaScript libraries and asynchronous loading of analytics and marketing scripts. It uses Google Tag Manager, Mixpanel, Microsoft Clarity, and Stripe for payments. Hosting appears to be cloud-based with Cloudflare DNS providing DNS services but without DNSSEC. The site is mobile-optimized with responsive design and good accessibility features. Performance is fast with preloading and preconnecting to key domains. SEO is well implemented with meta tags, Open Graph tags, and canonical URLs. No CMS like WordPress or Joomla detected, indicating a custom or proprietary platform.
Standards and sources

Reference chips under each finding point to the standard, regulation or specification the finding relates to. They are taken from the official datasets below and mapped conservatively: a finding with no defensible link shows none. NIS2 and GDPR references mark where a finding is relevant evidence, not a compliance verdict. Implementing Regulation (EU) 2024/2690 binds digital infrastructure and digital service providers; for other entities it is the most detailed public reading of the Article 21 measures. WCAG, EN 301 549, European Accessibility Act and Web Accessibility Directive references name the requirement an automated accessibility rule relates to; they are not a conformance verdict.

Retrieved 2026-10-25

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