recon

A passive domain-research tool that examines public internet metadata about an organisation’s email, cloud workspace, software, certificates, and security settings. It covers Microsoft 365, Google Workspace, DNS records, and several email-security standards.

In plain words
What is it for?
Use it to identify Microsoft 365 or Google Workspace tenants, inspect DMARC, DKIM, SPF, MTA-STS, and BIMI, fingerprint SaaS tools, review certificate-transparency data, and analyse security posture.
Why use it?
It helps gather a picture of a domain’s publicly visible technology and email-security setup without relying on private account access.

Plugin for Claude Code

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Claude Code
/plugin marketplace add blisspixel/recon
agentmods
npx agentmods add plugins/blisspixel/recon/claude-code
Clone the repo
git clone --depth 1 https://github.com/blisspixel/recon

Made for: Claude Code.

Per session not measured What this adds to a session before it is invoked.
When invoked not measured Not applicable: nothing here is loaded into a session.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Security

Grade A, and why

recon scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured yesterday.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

agents/claude-code/.claude-plugin/plugin.json · 23 lines

What it actually says

{
  "name": "recon",
  "version": "2.18.0",
  "description": "Public-metadata domain intelligence for Microsoft 365 / Google Workspace tenant identification, email security observation (DMARC, DKIM, SPF, MTA-STS, BIMI), SaaS fingerprinting, certificate-transparency findings, and posture analysis. Bundles the recon MCP server and its usage guidance.",
  "author": {
    "name": "blisspixel",
    "url": "https://github.com/blisspixel"
  },
  "homepage": "https://github.com/blisspixel/recon",
  "repository": "https://github.com/blisspixel/recon",
  "license": "Apache-2.0",
  "keywords": [
    "recon",
    "osint",
    "dns",
    "passive-recon",
    "m365",
    "google-workspace",
    "dmarc",
    "saas-fingerprinting"
  ]
}
Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. yesterday First seen · 23 lines scan A 38e601591395

Subscribe to this mod's changes

recon is a plugin published in the GitHub repository blisspixel/recon (4 stars, last pushed yesterday), licensed Apache-2.0. Its token cost is not measured: this kind of file is read by the harness, not the model. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.