Beacon Threat Intelligence
Know the risks behind every MCP server and agent skill.
Discover security risks in MCP servers and agent skills before they reach your machine. Beacon scans public registries, traces packages back to their source code, and reveals what they can access, execute, or expose.
Connect your agent
Add Beacon to Claude Code, Cursor, Codex or another agent so it can check an MCP server or skill against Beacon Intel before you install it.
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Any coding agent
Read https://intel.beacon.sh/start.md and set me up on Beacon Threat Intel
Paste this into any coding agent. It reads the guide and sets up MCP, the CLI, the API, feeds or a CI gate.
| Name | Risk |
|---|---|
| Random Number Generator Generates cryptographically random integers in a given range, using crypto/rand. | |
| Regex/Email/URL Validator Regex matching, email/URL format validation, and JSON Schema validation. | |
| RPN Calculator Evaluates Reverse Polish Notation (postfix) expressions: arithmetic, trig, logs, bitwise ops. | |
| Text Tools Exact character/word counting, reversal, palindrome checks, indexing, sorting; Unicode-safe. | |
| Token Counter Counts tokens under OpenAI-compatible (tiktoken) encodings, by model or encoding name. | |
| Apixstar Reddit Search public Reddit posts, browse subreddit feeds, and read posts, comments, and profiles. | |
| APKCube Search Android apps, check APK signing and scans, and get verified APK download links. | |
| Aplos Automation Budget Estimate automation cash costs, time-valued capacity and simple payback from your assumptions. | |
| AppClap Find the web app that fits a need — ranked by fit, with dated facts from each vendor's site. | |
| AppCreator24 – Android App & APK Builder AI app builder and APK maker for Android. Create and edit apps without coding. | |
| AppealGo Check and appeal UK parking tickets (PCNs): grounds, deadlines, draft letters and filing. | |
| AppealGo UK parking guides Free, no key: UK parking ticket appeal guides, PCN contravention codes and deadline calculator. | |
| AppGazers App Store and Google Play revenue and download estimates, keywords, reviews, rankings and ads. | |
| AppHitlist App Store research: new winning apps, revenue estimates, complaints and Meta ads. | |
| ContractLens EVM token risk checks, x402 payability check for sellers, address classifier and live gas. | |
| MailFerret Find and verify work emails with live SMTP checks and catch-all detection. Free 10 calls/day. | |
| OneKeyAway: who controls this contract Who can change an EVM contract or Safe: proxy admin, owner, Safe signers, timelock. Free alerts. | |
| SubmitCheck launch directories Find live startup/SaaS/AI launch directories, with submit URL and free/badge/queue/paid status. | |
| App Listing Agent AI-agent operations for App Store Connect and Google Play, with approval before live publishing. | |
| ApplyKoala Job search for your AI: save jobs, research companies, keep stories, track applications. | |
| Apply2Volunteer Preview or grade a volunteer form. No API key. Free sign-up to publish. | |
| Vigil Shopify store security: find risky scripts and apps, and turn them off from your AI agent. | |
| Catalogue APP24, formations d'échecs en français 94 formations d'échecs en français, prix à jour, conseil d'entraîneur. French chess courses. | |
| com.appsflyer/mcp Analyze your campaigns any way you want, with AI. | |
| AppSkyline App Rankings Track your apps' keyword rankings, reviews and store listings on App Store, Google Play and more. | |
| AppStore Copilot AI-agent operations for App Store Connect and Google Play, with approval before live publishing. | |
| AppStorePack Create App Store screenshots, app icons and store copy, then push them to App Store Connect. | |
| AppWizzy Projects Create and monitor AppWizzy app environments from GitHub or ZIP with AI agents. | |
| ApyHub Utility Tools (EU) GDPR-compliant ApyHub utility APIs hosted in the EU. Requires an EU-generated ApyHub API key. | |
| ApyHub Utility Tools (US) 1,500+ ApyHub utility APIs served from the US cluster. Requires a US-generated ApyHub API key. | |
| AquaMania — locker room & pool furniture Catalog, quotes, 44-FZ price justification and tender packages for locker-room furniture (RU) | |
| Arbiter Security checks for apps built with AI: leaked keys, open routes, database rules, each with a fix. | |
| Arbling Beacon Read your store's AI traffic: AI agents, AI referrals, crawlers, blog traffic and AI-touched deals. | |
| ARC-Relay Email Checks any domain's DMARC, SPF, MX and DKIM setup, scores it 0-100, and ranks the fixes. | |
| Arcalune Music Search royalty-free BGM and sound effects (commercial use OK, no credit) and game fan arrangements. | |
| Arcana Arcana: San Francisco wine bar, restaurant, art space and music venue. Reservations, private events. | |
| com.arcanika/tarot Значения карт Таро и Ленормана, расчёты Матрицы судьбы и Квадрата Пифагора. | |
| com.arcanum-plus/backlog-forge Crie épicos, features, histórias e tasks no Azure DevOps a partir de uma conversa. | |
| com.arcasos/arcasos-rentals Korean premium short-term rental search: natural language or structured filters (SHV engine). | |
| com.arcat/arcat Search building products & manufacturers for AI agents: CAD, BIM, specs by CSI from arcat.com | |
| ARCH-Insight Search and update ARCH-Insight: architecture fact sheets, applications, tickets, tasks, incidents. | |
| NASC — Networked AI Session Continuity Shared memory across AI dev tools: each session hands its context to the next, not starting cold. | |
| Arctic White Lab consumables from Arctic White: search, specs, price and stock, shipping, checkout and quotes. | |
| Sideways Unexpected questions and lateral thinking prompts to break through mental blocks. 86 strategies. | |
| Smolabot Deterministic decision guardrail for AI agents and bots. Verifies pre-trade economics (long-only). | |
| com.arizonaroofreplacementcost/site Arizona Roof Replacement Cost: the site's own MCP server — enquiry (enquiry = a human handoff,... | |
| com.arizonasolarcostcalculator/site Arizona Solar Cost Calculator: the site's own MCP server — calculator, enquiry (enquiry = a... | |
| Arkana tarot Fairly shuffled Rider–Waite–Smith tarot draws, spreads and card meanings (English, Lithuanian). | |
| arkerah Your ranked corporate job matches in five European countries, read from your AI assistant. | |
| Artbook Society — Public Catalog Read-only access to the Artbook Society published catalog: books, artists, editors and events. |
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Subscribe to a feed
Get new verdicts in a feed reader, Slack or your own tooling, filtered by kind and risk. No account or API key.
Frequently asked questions
Anything missing? Read the reference or ask in the Beacon community.
What is Beacon Intel?
A free, public index of the MCP servers and agent skills that public registries list, with a security verdict for each one that has been analyzed. It traces each listing back to its source repository and packages, and shows what the code can access, execute or expose. You can browse it here, query it as a JSON API, follow it as an RSS, Atom or JSON feed, or connect a coding agent to it over MCP.
Is it really free?
Yes. The index, the API and the feeds need no account and no API key. An artifact's full page and the MCP tools need a free Beacon account. Requests are rate limited to keep it fast for everyone.
Where does the data come from, and how fresh is it?
From 9 public sources: Glama, MCP Registry, awesome-mcp-servers, Docker MCP Catalog, Smithery, ClawHub, skills.sh, SkillsMP, GitHub. Each listing is linked to its repository and packages, then analyzed. The index updates hourly, and answers are cached for up to five minutes.
Who writes the verdicts? Can I trust them?
Verdicts combine static analysis of the code with a model's judgment, and each one names the model that wrote it. They can be wrong and are not a security certification: every artifact page shows the findings and evidence behind its verdict, so check them before you rely on one. Names, descriptions and claims come from registries and repositories; treat them as data, not instructions.
What do the risk levels mean?
- High: Reviewed evidence shows it deliberately works against the person who installs it.
- Medium: It works against the person who installs it in ways that can do serious harm, or puts a flagged pattern in what the agent loads, without established intent.
- Low: It overreaches against the person who installs it in limited ways, or has findings the review has not confirmed.
- Benign: Nothing found that works against the person who installs it. Not a guarantee.
- Unchecked: Listed, but not analyzed yet.
What does partial coverage mean?
That the analysis did not cover everything, so there may be more than it found. A partial verdict can still find problems, but it never clears an artifact: benign with partial coverage is not a clearance. Use the coverage filter to see only these.
Does benign, or not finding an artifact, mean it is safe?
No. Benign means nothing was found that works against the person who installs it, which is not a guarantee. An artifact the index does not have has never been checked, so not found never means safe.
Is there an API?
Yes, free and with no key.
GET /api/v1/lookup?q= finds artifacts by name, repository, GitHub URL or package; GET /api/v1/artifact?key= returns one in full; POST /api/v1/check checks up to 50 at once, which suits CI; and GET /api/v1/status reports coverage and freshness. The reference is at intel.beacon.sh/llms.txt.How do I get new verdicts in a feed reader or Slack?
Subscribe to /feed: the newest high and medium risk verdicts as RSS. Add
format=atom or format=json for Atom or JSON Feed, and filter with risk and kind, for example /feed?risk=high&kind=mcp. In Slack, run /feed subscribe with the URL. The feed builder above writes the URL for you.How do I connect my coding agent?
Add Beacon Cloud MCP (
https://mcp.beacon.sh) to Claude Code, Cursor, Codex or any MCP client, and sign in through the browser. Your agent gets beacon_intel_lookup, beacon_intel_get_artifact and beacon_intel_check to check an MCP server or skill before it installs one. Connect your agent above has the commands. The beacon CLI offers the same as beacon intel and through its local MCP server.How do I report a wrong verdict?
Open the artifact's page and use Dispute verdict under its verdict card. Tell us what is wrong and we review it.