HTTP Headers Analysis for https://api.sheetmonkey.io

Detected Technologies from Headers

See all in URL Inspect 4

AWS

AWS API Gateway

AWS CloudFront

Express

HTTP Security Headers

Status

Strict-Transport-Security

Missing

Not configured

Content-Security-Policy

Good

default-src Analyze

Content-Security-Policy-Report-Only

Missing

Not configured Analyze

X-Frame-Options

Missing

Not configured

X-Content-Type-Options

Good

nosniff

Referrer-Policy

Missing

Not configured

Permissions-Policy

Missing

Not configured

Recommendations

• Add Strict-Transport-Security header with max-age of at least 1 year
• Strengthen CSP by removing 'unsafe-eval'
• Add X-Frame-Options: DENY or SAMEORIGIN to prevent clickjacking
• Add Referrer-Policy header (recommended: strict-origin-when-cross-origin)
• Consider adding Permissions-Policy to control browser features

Performance Headers

Connection

Performance

close

connection: close

Caching Headers

No caching headers found

Content Headers

Content-Length

Content

139

Content-Type

Content

text/html; charset=utf-8

content-length: 139
content-type: text/html; charset=utf-8

Server Headers

X-Powered-By

Server

Express

x-powered-by: Express

CORS Headers

Access-Control-Allow-Origin

Cors

*

access-control-allow-origin: *

Cookies Headers

No cookies headers found

Other Headers

Date

Other

Wed, 29 Apr 2026 22:05:01 GMT

Via

Other

1.1 94d91ef74fd7aa50877163a89eadc42c.cloudfront.net (CloudFront), 1.1 fd24baa8ef28b0365696ab4b52922460.cloudfront.net (CloudFront)

X-Amz-Apigw-Id

Other

cmkGGEIGyK4Eaew=

X-Amz-Cf-Id

Other

-Bj9gIehDN39hGDBlEZwI2IXCk9h8HJSwaQW_bo9ATJX1R18ng-zJg==

X-Amz-Cf-Pop

Other

IAD55-P2, IAD61-P13

X-Amzn-Remapped-Connection

Other

keep-alive

X-Amzn-Remapped-Content-Length

Other

139

X-Amzn-Remapped-Date

Other

Wed, 29 Apr 2026 22:05:01 GMT

X-Amzn-Requestid

Other

14de7590-99f7-4765-a723-002b15b8f5d8

X-Amzn-Trace-Id

Other

Root=1-69f2808d-3f9b887e270493914c6ec385;Parent=36ac9fa7bf1aa75d;Sampled=0;Lineage=1:a7d2b10d:0

X-Cache

Other

Error from cloudfront

date: Wed, 29 Apr 2026 22:05:01 GMT
via: 1.1 94d91ef74fd7aa50877163a89eadc42c.cloudfront.net (CloudFront), 1.1 fd24baa8ef28b0365696ab4b52922460.cloudfront.net (CloudFront)
x-amz-apigw-id: cmkGGEIGyK4Eaew=
x-amz-cf-id: -Bj9gIehDN39hGDBlEZwI2IXCk9h8HJSwaQW_bo9ATJX1R18ng-zJg==
x-amz-cf-pop: IAD55-P2, IAD61-P13
x-amzn-remapped-connection: keep-alive
x-amzn-remapped-content-length: 139
x-amzn-remapped-date: Wed, 29 Apr 2026 22:05:01 GMT
x-amzn-requestid: 14de7590-99f7-4765-a723-002b15b8f5d8
x-amzn-trace-id: Root=1-69f2808d-3f9b887e270493914c6ec385;Parent=36ac9fa7bf1aa75d;Sampled=0;Lineage=1:a7d2b10d:0
x-cache: Error from cloudfront

Recommendations

Enable compression (gzip/brotli) to improve performance

Add Cache-Control header to optimize caching

Consider removing X-Powered-By header to hide server technology