admintoolkit.io gives admins browser-based DNS, mail authentication, TLS, HTTP, public IP, CIDR, and EDID checks with local parsing and explicit live lookups.
admintoolkit.io gives admins browser-based DNS, mail authentication, TLS, HTTP, public IP, CIDR, and EDID checks with local parsing and explicit live lookups.
Who it is for
System administrators, engineers and AI-agent developers
The solution
admintoolkit.io brings together essential browser tools for admins, engineers and AI agents: DNS, mail security, TLS, HTTP headers, public IP checks, CIDR, EDID, and agent-readable web metadata such as robots.txt, llms.txt, A2A Agent Cards, and WebMCP tool definitions. The tools are built for traceable diagnostics with local parsing where possible, explicit live lookups, and WebMCP support for AI agents.
Features5 listed
DNS and network diagnostics
Mail security checks
TLS and HTTP header checks
Robots and llms.txt validation
Agent metadata validation
Details
Built for
System administrators, engineers and AI-agent developers
In IndieTools' mobile lab test on November 12, 2026, the admintoolkit website scored 100 out of 100 (good). All 5 lab metrics were rated good. It placed #21 overall in the finalized week 2026-W45.
Measured (UTC)
LCPLargest Contentful Paint
937 ms
Good
TBTTotal Blocking Time
0 ms
Good
CLSCumulative Layout Shift
0.000
Good
FCPFirst Contentful Paint
937 ms
Good
Ranked #21 overall in 2026-W45, best #3.
admintoolkit lab metrics
Speed metrics for admintoolkit, measured November 12, 2026
Metric
Result
Status
Trend
Mobile lab testMid-range phone on a throttled 4G connection, two runs averaged. Changes compare with the run on Nov 11.
Performance score
GoodAbout the same
100 / 100
GoodAbout the same
First Contentful PaintFCP
GoodAbout the same
937 ms
GoodAbout the same
Largest Contentful PaintLCP
GoodAbout the same
937 ms
GoodAbout the same
Speed IndexSI
GoodAbout the same
937 ms
GoodAbout the same
Total Blocking TimeTBT
GoodAbout the same
0 ms
GoodAbout the same
Cumulative Layout ShiftCLS
GoodAbout the same
0.000
GoodAbout the same
Unthrottled observationsTimed on the test machine's own fast connection, so they read lower than the lab metrics above.
Page loadLoad
58 ms slower
330 ms
58 ms slower
Server responseTTFB
About the same
4 ms
About the same
admintoolkit performance history
55 comparable mobile lab runs since September 27, 2026. Choose a metric and a range, then move along the line to read each run.
admintoolkit Speed ranking
Weekly Speed standing for admintoolkit
Weekly standingLatest finalized week 2026-W45. Bests cover the last 52 finalized weeks.
Stored lab observations from controlled test runs, not real-user Core Web Vitals or a guarantee of search rankings. Weekly standings remain attached to their finalized edition.Method psi-mobile-two-sample-mean-v1, 2 samples per reading. Lab results can vary between runs.
Model difference−5. DR4 is 5 points lower than DR3.
Measured · admintoolkit.io
What do DR4, DR3 and the model difference mean?
DR4:
Ahrefs' newer model. It gives more weight to links from sites with organic search traffic and rates a subdomain on its own links.
DR3:
The previous model, shown in the Ahrefs app until 1 December 2026.
Model difference:
DR4 minus DR3 for the same domain. The models calculate differently, so this is not growth or a drop; the “since” lines compare each model with itself.