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.
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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 |
|---|---|
| Groups Tool Display user group memberships on the system. Shows all groups a user belongs to for permission auditing and access control verification. | |
| Hash Tool Compute cryptographic hash values of files and text. Use for verifying file integrity, checksums, and data validation. | |
| Head Tool Display the first lines of files. Use for quickly previewing file contents, checking headers, or sampling data. | |
| Hex Tool Convert data between hexadecimal and other formats. Use for debugging binary data, examining file headers, and working with hex dumps. | |
| Hexdump Tool Display file contents in hexadecimal and ASCII format. Use for binary file analysis, forensic examination, and low-level data inspection. | |
| Hostname Tool Display or set the system hostname. Use for identifying the current machine on a network and configuring system identity. | |
| Id Tool Display user and group identity information. Shows real and effective user ID, group ID, and supplementary groups for the current process. | |
| Join Tool Join lines of text from multiple files based on a common field. Use for relational data operations similar to SQL JOIN on text files. | |
| Json Tool Validate, format, and transform JSON data. Use when user needs to pretty print JSON, validate JSON syntax, minify JSON, extract JSON paths, or convert JSON t... | |
| Kill Tool Terminate processes by sending signals. Use for stopping unresponsive programs, managing background tasks, and process lifecycle control. | |
| Less Tool View file contents with interactive scrolling and search. Use for reading log files, code, and large text documents with pagination. | |
| Ln Tool Create hard and symbolic links between files. Use for file referencing, shortcuts, and directory organization. | |
| Ls Tool List directory contents with detailed file information. Use for browsing files, checking permissions, and examining directory structure. | |
| Markdown Tool Convert Markdown text to HTML and other formats. Use for documentation generation, content formatting, and text transformation. | |
| Md5 Tool Compute MD5 cryptographic hash values for files and text. Use for file integrity verification and checksum validation. | |
| Mkdir Tool Create directories and directory hierarchies. Use for organizing files, setting up project structures, and managing filesystem layout. | |
| Mv Tool Move or rename files and directories. Use for file organization, relocation, and renaming operations. | |
| Nc Tool Read and write data across network connections using TCP or UDP. Use for network debugging, port scanning, and data transfer. | |
| Netstat Tool Display network connections, routing tables, and interface statistics. Use for network diagnostics and monitoring. | |
| Network Tool Display and manage network interfaces, connections, and routing information. Use for network diagnostics and configuration analysis. | |
| Nl Tool Number lines of text files, showing line numbers alongside content. Use for reference, indexing, and code line numbering. | |
| Notify Tool Send desktop notifications from command line scripts and automated tasks. Use for alerts, reminders, and process completion notifications. | |
| Notion Integration Work with Notion databases, pages, and APIs. Use when user needs to create, read, update, or delete Notion pages and databases; automate Notion workflows; sy... | |
| Nslookup Tool Query DNS servers to resolve domain names to IP addresses. Use for network troubleshooting and DNS diagnostics. | |
| Od Tool Dump file contents in octal, decimal, hexadecimal, and ASCII formats. Use for binary data inspection and low-level file analysis. | |
| Paste Tool Merge lines from multiple files side by side, creating columnar output. Use for combining data from separate sources into aligned tables. | |
| Ping Tool Test network connectivity to remote hosts by sending ICMP echo requests. Use for network diagnostics and latency measurement. | |
| Print Tool Output text and variable values to standard output. Use for displaying messages, script output, and debug information. | |
| Printf Tool Format and print data with precise control over output format. Use for formatted output with padding, precision, and type specifications. | |
| Ps Tool Display information about active processes. Use for monitoring running programs, checking resource usage, and system diagnostics. | |
| Pwd Tool Print the full path of the current working directory. Use for identifying your location in the filesystem. | |
| Random Tool Generate random numbers, passwords, and strings with configurable length and character sets. Use for security tokens, testing data, and randomization. | |
| Read Tool Read a line from standard input into a variable. Use for interactive shell prompts and script input handling. | |
| Readlink Tool Display the target of a symbolic link. Use for resolving symlinks to find the actual file or directory they point to. | |
| Realpath Tool Resolve relative paths and symbolic links to absolute canonical paths. Use for getting the full, unambiguous file path. | |
| Regex Tool Match and extract text patterns using regular expressions. Use for data validation, text parsing, and pattern-based extraction tasks. | |
| Rev Tool Reverse each line of text character by character. Use for text analysis, palindrome detection, and data format conversion. | |
| Reverse Tool Reverse the order of lines or characters in text input. Use for text transformation, palindrome checking, and data reordering. | |
| Rm Tool Remove files and directories permanently. Use for file deletion, cleanup, and disk space management. | |
| Rss Aggregator Parse, aggregate and process RSS/Atom feeds. Use when user wants to track multiple RSS feeds, create personalized news digest, monitor blog updates, or build... | |
| Schedule Task Schedule and run recurring tasks on Linux/Unix systems. Use when user wants to set up cron jobs, scheduled backups, periodic data sync, automated reports, or... | |
| Scp Tool Securely copy files between local and remote hosts over SSH. Use for file transfers, remote backups, and deployment tasks. | |
| Data Scraper Extract data from websites and APIs for analysis. Use when user needs to collect product prices from e-commerce sites, gather news articles, extract structur... | |
| Sed Tool Stream editor for filtering and transforming text using scripts. Use for find-and-replace, text manipulation, and batch file editing. | |
| Seq Tool Generate sequences of numbers with configurable start, end, and increment values. Use for creating numbered lists, loops, and ranges. | |
| Sha Tool Compute SHA family hash values for file integrity verification. Use for checksums, data validation, and security verification. | |
| Sha1 Tool Compute SHA-1 160-bit cryptographic hash values. Use for file integrity checking and data fingerprinting. | |
| Sha256 Tool Compute SHA-256 cryptographic hash values for files and text. Use for secure data verification and integrity checks. | |
| Shuf Tool Randomly shuffle lines of text input. Use for random sampling, data randomization, and selection tasks. | |
| Sleep Tool Delay execution for a specified amount of time. Use for timing in scripts, waiting between operations, and scheduling delays. |
25,951–26,000 of 108,824
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.