What technology does oadoi.org use?

oadoi.org is built with Vue.js, Express, Node.js.

Is oadoi.org secure (HTTPS)?

Yes. oadoi.org uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Oct 5, 2026.

Hosting provider information for oadoi.org is not available yet.

What is oadoi.org's SEO score?

oadoi.org scored 45/100 for SEO in the latest analysis (poor).

What is oadoi.org's overall website score?

oadoi.org has an overall SiteGraph score of 71/100, combining SEO, performance, security, and accessibility.

oadoi.org

Unpaywall: An open database of 20 million free scholarly articles

Last scanned Aug 24, 2026, 1:21 PM

Overall score

Fair

Summary

This website uses Express. SEO is poor (45/100) and accessibility is good (80/100). Security scores fair (65/100) and performance excellent (100/100). Top issue: Title longer than 60 characters.

Top issues to fix

14 issues found · 4 high priority

Missing Strict-Transport-Security header
Security
Add HSTS so browsers always use HTTPS — this closes the protocol-downgrade attack window.
Missing Content-Security-Policy header
Security
Add a CSP to control which sources can run scripts — the strongest single defense against XSS.
Missing meta description
SEO
Add a ~150-character meta description to control your search-result snippet and lift click-through rate.
No H1 heading found
SEO
Add exactly one H1 describing the page's main topic — it anchors the document outline for search engines and screen readers.
Missing X-Content-Type-Options header
Security
Add X-Content-Type-Options: nosniff to stop MIME-sniffing attacks.
Missing X-Frame-Options header
Security
Add X-Frame-Options (or a CSP frame-ancestors rule) to prevent clickjacking via hidden iframes.

+8 more issues — details in the sections below.

SEO

8 issue(s) found

100

Performance

610 ms

Security

HTTPS & header checks

Accessibility

2 issue(s) found

Not enough scan history yet to show a trend — check back after this site has been re-scanned a few more times.

Organization

Company details published in this site's own structured data.

X (Twitter)

Contact

Email, phone, and address published on this site's own pages.

Email: support@openalex.org team@ourresearch.org

Meta tags

Title: Unpaywall: An open database of 20 million free scholarly articles
Description
Canonical
Language
Charset: utf-8
Viewport: width=device-width,initial-scale=1
Robots meta
Manifest

Technologies

Detected frameworks, languages, and tools.

Vue.js Express Node.js

Hosting & CDN

Hosting provider: —
CDN provider: —
IP address: —
ASN: —

DNS records

Type	Value
A	—
AAAA	—
MX	—
TXT	—
NS	—
CAA	—
CNAME	—
IPv6 support	No

TLS / SSL certificate

Version: TLS 1.3
Issuer: Let's Encrypt
Subject: unpaywall.org
Valid from: Jul 7, 2026
Valid to: Oct 5, 2026
Days until expiry: 41
SAN domains: unpaywall.org

Security headers

Strict-Transport-SecurityMissing
Content-Security-PolicyMissing
X-Frame-OptionsMissing
X-Content-Type-OptionsMissing
Referrer-PolicyMissing
Permissions-PolicyMissing

Compression: none · 0 cookie(s) observed

Content & assets

Headings

H1 0 · H2 4 · H3 3

Links

19 internal · 5 external · 20 broken

Images

4 total · 0 missing alt

Scripts / Styles

2 scripts · 6 stylesheets

JS / CSS size

0 B · 15.3 KB

Page size

1.4 KB

Robots.txt & Sitemap

robots.txt: Not found
Disallow rules: 0
sitemap.xml: Not found
URLs in sitemap: 0

SEO issues

Title longer than 60 characters
Missing meta description
Missing canonical link
No H1 heading found
No structured data (JSON-LD) found
Missing OpenGraph tags
robots.txt not found
sitemap.xml not found

Scan details

Requested URL: https://oadoi.org
Final URL: https://unpaywall.org/data
HTTP status: 200
HTTP version: HTTP/2
Response time: 610 ms
HTML size: 1.4 KB
Redirect chain: https://oadoi.org → http://unpaywall.org/data → https://unpaywall.org/data

See something wrong on this report? Request a correction

Same technology stack

zattini.com.br

Loja de Moda Online - Roupas, Calçados e Acessórios | Zattini

expressnginxgoogle-analytics

forever.com

Permanent Cloud Storage | FOREVER.com

expressnuxtvue

mego.travel

Купить дешевые авиабилеты онлайн: цены, поиск и покупка билетов на самолет - Mego.travel

expressvuenodejs

· CloudFront

bigolive.tv

BIGO LIVE - Live Stream, Live Games, Chat Rooms Online

expressnginxvue

bigo.tv

BIGO LIVE - Live Stream, Live Games, Chat Rooms Online

expressnginxvue

estantevirtual.com.br

Estante Virtual - Livros novos e usados com preços imbatíveis!

nginxexpressnodejs

Frequently asked questions

What technology does oadoi.org use?: oadoi.org is built with Vue.js, Express, Node.js.
Is oadoi.org secure (HTTPS)?: Yes. oadoi.org uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Oct 5, 2026.
Who hosts oadoi.org?: Hosting provider information for oadoi.org is not available yet.
What is oadoi.org's SEO score?: oadoi.org scored 45/100 for SEO in the latest analysis (poor).
What is oadoi.org's overall website score?: oadoi.org has an overall SiteGraph score of 71/100, combining SEO, performance, security, and accessibility.