the unofficial Postman mobile app - Cosmo
Use postman on the go.
Report generated on April 5, 2026
A note on how to read this
This report is ProdPoke's take on your site — think of it as a first impression from a very opinionated robot. We check real things (load times, broken links, accessibility patterns), but we also try to understand what your site is trying to do and whether the technical details support that goal. Some of our observations might not apply to your specific situation, and that's okay. We're getting sharper with every scan. If something feels off, tell us — it makes us better.
Key Insights for the unofficial Postman mobile app - Cosmo
Your 864KB signin.svg delays login by 605ms — users authenticating with Postman API keys wait unnecessarily.
Authentication is the critical first step for Cosmo users. Every millisecond of delay during login creates friction that could cause potential users to abandon the app before experiencing its privacy-first value proposition.
Four unlabeled interactive elements block screen reader users from accessing login and account management features.
Vision-impaired users cannot navigate Cosmo's authentication flow or manage their accounts — they literally cannot use the app. This excludes an audience segment entirely and creates legal accessibility compliance risk.
Missing og:description means when users share Cosmo on social media, potential adopters see no description of what the app actually does.
For an unofficial app relying on word-of-mouth adoption, social sharing previews are critical marketing. Without a compelling description tag, shared links appear incomplete and fail to convert curious clickers into users.
Missing lang attribute on <html> signals to search engines that your English landing page may not be in English.
Users searching for 'Postman mobile app' or 'unofficial Postman client' won't find Cosmo reliably in search results because indexing accuracy and ranking are undermined. This directly limits discoverability.
No robots.txt or sitemap means search engines have no roadmap to your documentation and account pages — they're essentially invisible to organic search.
Without these files, search engines may inefficiently crawl sensitive auth pages or miss documentation entirely. A sitemap would ensure your public pages rank, while robots.txt protects private areas.
What ProdPoke understands about the unofficial Postman mobile app - Cosmo
Cosmo is an unofficial mobile application for Postman that allows users to access and view their Postman data on mobile devices. The app requires users to provide their Postman API key for authentication, since Postman itself doesn't support OAuth flows. According to the FAQs, Cosmo prioritizes user privacy by storing API keys encrypted locally on the device, never sending them to external servers, and not storing any request/response data or collection information on its servers. The application is built with Next.js and Tailwind CSS, hosted on Netlify, and includes account management features with the ability to delete accounts via email request.
Based on exploring 1 page across the site
First Impression — How clear is your site?
Cosmo is a mobile app for Postman that allows users to "Access your Postman collections on the go" and "execute some API requests for your team or customers" when away from a computer. The site describes it as "Postman's best friend."
This score measures how quickly a first-time visitor understands what your site does — based on visible headings, navigation, and visual hierarchy alone.
Overall Score
Strong foundation.
Performance
92/100Large asset: 864KB — https://fetchcosmo.netlify.app/images/signin.svg
The signin.svg asset at 864KB is significantly oversized and takes 605ms to load. This delays the login experience for users trying to authenticate with their Postman API key and contributes to slower initial page load times on mobile devices.
Found: 864KB
SEO
75/100Missing Open Graph tags: og:description
When Cosmo is shared on social media or messaging platforms, the preview will be missing a compelling description. This is especially important for driving adoption of the app, as potential users won't see a clear summary of what Cosmo does when shared by current users.
Found: Missing: og:description
Missing lang attribute on <html>
The missing lang attribute means search engines and accessibility tools won't automatically recognize that Cosmo's landing page is in English, potentially affecting SEO rankings and screen reader functionality for vision-impaired users exploring the app.
Found: No lang attribute
No canonical URL specified
Without a canonical URL, search engines may create duplicate index entries for Cosmo's landing page if it's accessible via multiple URL variations, which could dilute search visibility for the app.
No robots.txt found
Without robots.txt, search engines have no explicit guidance on crawling Cosmo's pages, which could lead to inefficient indexing or unintended crawling of sensitive areas like authentication pages.
No sitemap.xml found
A sitemap would help search engines discover all pages of Cosmo's web presence (landing page, documentation, account management pages), improving visibility for users searching for the unofficial Postman mobile app.
Accessibility
92/1004 interactive element(s) without accessible names
Four interactive elements (likely buttons or controls) lack accessible names, meaning users relying on screen readers cannot understand their function. This prevents vision-impaired users from navigating the app's login and account management features.
Found: 4 missing: <a.flex>, <a.flex>, <input[type=hidden]>, <a.flex>
Functional
100/100Compliance
92/1001 finding suppressed (not relevant to this site type)
Key Metrics
Crawlability
Standards
Improvement Plan
Cosmo faces three distinct but interconnected problems: performance that damages the login experience, accessibility barriers that exclude vision-impaired users, and discovery issues that limit growth through social and organic channels. Start with the 864KB signin.svg asset — this is your highest-impact fix. Compress it to under 100KB using an SVG optimizer (like SVGO) or convert to WebP if it contains raster data. This single fix will reclaim 605ms of login latency on mobile, directly improving the critical path for your core feature: API key authentication.
Second, add accessible names to your four unlabeled interactive elements. Review your signin and account management forms — buttons and form controls need aria-label or visible text. This is non-negotiable: it removes a legal compliance risk and unlocks the app for screen reader users, expanding your addressable market. Both fixes should take 2-3 hours but will transform user experience for authentication flows.
Third, implement basic SEO infrastructure: add the lang="en" attribute to your <html> tag, add an og:description meta tag describing Cosmo as 'An unofficial Postman mobile app that lets you access your collections and requests on the go — with API keys encrypted locally for privacy,' and create a simple robots.txt (allow all public pages, disallow /admin or auth routes if applicable). These three additions take 30 minutes and dramatically improve how the app appears in social previews and search results.
Finally, create a sitemap.xml listing your landing page, documentation, and FAQ pages. This helps search engines prioritize your public content and improves rankings for queries like 'Postman mobile alternative.' Prioritize in this order: (1) compress signin.svg, (2) fix accessibility names, (3) add lang and og:description, (4) add robots.txt and sitemap. The first two directly serve your users; the last two serve your growth.
Suggested priority order:
- Large asset: 864KB — signin.svg
- 4 interactive element(s) without accessible names
- Missing Open Graph tags: og:description
- Missing lang attribute on <html>
- No robots.txt found
- No sitemap.xml found
- No canonical URL specified
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What is ProdPoke?Automated analysis generated on April 5, 2026. Not professional advice. Contact us to modify or remove this report.