Polar
A developer-focused merchant of record that combines subscriptions, usage-based billing and digital product delivery behind a single API.
A percentage plus a fixed fee per transaction, with optional monthly plan tiers that lower the percentage as volume grows; a no-monthly-fee entry tier is available.
Open source
Appears in 1 guide
Where it ranks
Guides that include Polar.
Security headers
What Polar's website sends to your browser.
Scanned 2026-08-25. Grade headers B, scoring 70 out of 100.
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Content-Security-Policy is set
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Strict-Transport-Security is set
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No X-Content-Type-Options, so MIME sniffing is not disabled
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X-Frame-Options is set
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No Referrer-Policy, so full URLs may leak to third parties
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Permissions-Policy is set
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No Cross-Origin-Opener-Policy
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No Cross-Origin-Resource-Policy
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No server-version or X-Powered-By disclosure
This is one narrow, automated check of the HTTP response headers on the vendor's own website. It says nothing about how the product itself is built, how it stores your data, or whether it has ever been audited. A good grade here is a small signal that somebody was paying attention.