rt_check_oauth

MCP tool from MCP Security Scanner by badchars

Test if HTTP/SSE server validates OAuth tokens — sends no token, invalid token, and forged JWT (alg:none)

How to use it

rt_check_oauth is exposed by the MCP Security Scanner MCP server. Add the server to your MCP client (Claude Desktop, Cursor, Windsurf and others), and the rt_check_oauth tool becomes available to the model automatically. See the full listing for setup details and every tool this server provides.

Install MCP Security Scanner

$npx -y mcp-security-scanner

FULL MCP SECURITY SCANNER LISTING

Other tools in MCP Security Scanner (39)

cfg_audit_mcp_config

Deep audit of an MCP config file — env var exposure, stdio vs SSE transport, argument injection

cfg_auto_discover

Auto-discover all MCP configuration files — Claude Desktop, Cursor, VS Code, Windsurf, custom paths

cfg_check_context_oversharing

Check for context oversharing — configs exposing too many tools or resources to the agent

cfg_check_shadow_servers

Detect shadow MCP servers — unauthorized servers in config that shouldn't be there

cfg_scan_env_files

Scan .env files for secrets, oversharing, and insecure variable patterns

rt_check_ansi_injection

Detect ANSI escape sequences in tool descriptions that can manipulate terminal output or hide content

rt_check_auth

Analyze server authentication and authorization mechanisms

rt_check_callbacks

Detect callback/webhook URL parameters that could enable SSRF — checks for missing URL constraints

rt_check_capabilities

Inspect server capabilities — experimental features, dynamic tool changes (listChanged), logging, sampling

rt_check_cross_origin

Check for cross-origin tool invocation risks between multiple connected MCP servers

rt_check_http_security

Check HTTP response headers — HSTS, CORS, X-Content-Type-Options, Cache-Control, cookie flags

rt_check_instructions

Analyze server instructions from initialization for poisoning, social engineering, excessive length

rt_check_prompt_injection

Fetch prompt content via getPrompt() and scan for injection patterns, template syntax, dangerous arguments

rt_check_protocol_version

Check server name/version from initialization — flags missing info, outdated SDK versions

rt_check_rate_limiting

Send rapid ping() bursts to test rate limiting — flags servers accepting unlimited requests

rt_check_resource_content

Read actual resource content via readResource() and scan for poisoning, ANSI, Unicode stego, oversized content

rt_check_resource_exposure

Check for sensitive resource exposure through MCP resource endpoints

rt_check_scope_creep

Analyze tool schemas for excessive permissions — tools requesting more access than their description implies

rt_check_tls

Inspect TLS certificate — expired, self-signed, weak signature (SHA-1), short key (<2048 bits), plain HTTP

rt_check_tool_mutation

Dual-snapshot comparison with configurable delay — detect tool additions, removals, description changes (rug pull)

rt_check_tool_poisoning

Scan tool descriptions for 15+ poisoning patterns — hidden instructions, prompt injection, data exfiltration triggers

rt_check_tool_shadowing

Detect tools that shadow or override standard tool names to intercept agent actions

rt_check_unicode_steganography

Detect zero-width Unicode characters used to hide instructions in tool descriptions (steganography)

rt_fuzz_tools

Fuzz-test tools with edge-case inputs — path traversal, command injection, SQL injection, type confusion (dry-run by default)

rt_inspect_server

Connect to a running MCP server (stdio/HTTP/SSE) and enumerate all tools, schemas, resources, and prompts

rt_pin_tools

Generate SHA-256 pins for all tool definitions — descriptions, schemas, and metadata

rt_verify_pins

Verify current tool definitions against previously saved pins to detect rug pull modifications

sast_code_execution

Detect code execution vulnerabilities — eval(), Function(), vm.runInNewContext() with user input

sast_command_injection

Detect command injection vulnerabilities — taint tracking from tool inputs to exec/spawn/execFile sinks

sast_hardcoded_secrets

Detect hardcoded secrets — API keys, passwords, tokens, connection strings in source code

sast_info_disclosure

Detect information disclosure — stack traces, debug output, verbose errors exposed to clients

sast_insecure_crypto

Detect insecure cryptographic usage — MD5, SHA1, ECB mode, hardcoded IVs, weak key sizes

sast_missing_logging

Audit logging coverage — detect tool handlers missing audit logging for security events

sast_path_traversal

Detect path traversal vulnerabilities — taint tracking from tool inputs to fs.readFile/writeFile sinks

sast_prototype_pollution

Detect prototype pollution vectors — unsafe object merging, bracket notation with user input

sast_regex_dos

Detect ReDoS-vulnerable regular expressions — catastrophic backtracking patterns

sast_scan_directory

Full SAST scan of a directory — runs all 11 analyzers with AST-based taint tracking via ts-morph

sast_ssrf

Detect SSRF vulnerabilities — taint tracking from tool inputs to fetch/http.request/axios sinks

sast_unsafe_regex

Detect unsafe regex patterns — unescaped user input in RegExp constructors