find-exposed-servers SKILL.md skillA
find-exposed-servers from tonydzi/second-brain-starter-kit is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add tonydzi/second-brain-starter-kit/find-exposed-servers@git:20261020.402f6b7Pins git:20261020.402f6b7 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- tonydzi/second-brain-starter-kit
- Path
skills/find-exposed-servers/SKILL.md- Versions recorded
- 4
- Latest version
- git:20261020.402f6b7, committed Oct 20, 2026
- First version recorded
- Sep 24, 2026
- Size
- 13,820 bytes
- Repository stars
- 14
- License
- MIT
- Find internet-exposed hosts, ports, services and devices using third-party internet-scan data instead of touching the target. Use when asked what a company has exposed to the internet, to check open ports on an IP or netblock, or to write a Shodan filter query.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Find exposed servers Internet-wide scanners already scanned your target. Querying their results is passive — you never send a packet to the target, so nothing appears in their logs and nothing is attributable to you. The cost is that every result is a claim about a moment in the past, and the beginner's mistake is reading a banner as the current state of a live host. ## Which platform first | You hold | Reach for | Why | |---|---|---| | An IP | Shodan host lookup, or the free InternetDB endpoint | One request gives ports, hostnames, and CPEs | | A netblock or ASN | Shodan `net:`/`asn:` with port faceting | Shows the shape of the estate before you look at individual hosts | | A hostname behind a CDN | Censys certificate-to-host joins | Censys links certs to observed hosts, which is how you find origins | | A cert or a distinctive page | Favicon hash and cert subject/serial searches | Finds sibling infrastructure the DNS never links | | An org name | `org:` on Shodan, `autonomous_system` on Censys | Both are attribution by network registration, so both inherit its errors | …
Read the whole file at its exact version.
How to install
mdr add tonydzi/second-brain-starter-kit/find-exposed-servers@sha256:d9642d59596dacc7The line at the top of this page pins the label git:20261020.402f6b7, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_xvcemztr4sdtu5zt)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 4 versions of this file, between Sep 24, 2026 and Oct 20, 2026, about one every 9 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261020.402f6b7 latest | 2026-10-20 | 402f6b7 | 13,820 B | A | view · diff |
| git:20261007.cd6c208 | 2026-10-07 | cd6c208 | 13,826 B | A | view · diff |
| git:20261003.a2d662f | 2026-10-03 | a2d662f | 13,827 B | A | view · diff |
| git:20260924.2784cb2 | 2026-09-24 | 2784cb2 | 12,712 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (13820 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
tonydzi/second-brain-starter-kit · 14 stars · license MIT · pushed 2026-11-06 · branch master
API
GET https://markdownregistry.com/api/v1/artifacts/art_xvcemztr4sdtu5zt GET https://markdownregistry.com/api/v1/resolve?ref=tonydzi/second-brain-starter-kit/find-exposed-servers GET https://markdownregistry.com/api/v1/blob/d9642d59596dacc7c2814e89eb4e34ce0da4367e8c6de0736142c350975599df
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.