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Browse free walking tours and activities in 200+ cities worldwide, check availability, and access detailed tour information.
Do not connect
A critical issue was found. Do not connect this server as-is.
Scanned 28 days ago Due for re-check
A server can change after it's graded. Re-run the automated scan to refresh this report.
This grade is deterministic and reproducible: the same server surface always yields the same grade under a given algorithm version. It is a real automated assessment computed by the MCPGrade engine from what the probe actually observed — not a fabricated or opinion score. It is not a manual human pentest, so it can miss context-specific risks.
Every signal below was measured directly by the automated probe. The grade is derived only from evidence like this — nothing is assumed.
The guruwalk MCP server exposes 9 tools, focused primarily on general-purpose capabilities. Its published description reads: "Browse free walking tours and activities in 200+ cities worldwide, check availability, and access detailed tour information". It communicates over Streamable HTTP using the 2025-06-18 protocol revision, and does not require authorization to connect. MCPGrade currently rates guruwalk F — a critical issue was found and the server should not be connected as-is. Its most notable findings include "Data-exfiltration parameters" and "Cross-tool shadowing". This report is a deterministic, reproducible automated assessment: the same observed surface always yields the same grade under a given algorithm version, and it is refreshed as new scans arrive and free to read — but it is not a substitute for a manual human security review. Always re-check guruwalk's advertised tools, transport security, and authorization posture before connecting an autonomous agent or sharing sensitive context with it.
Add guruwalk to an MCP client using the endpoint below. Review the grade and findings above before granting an autonomous agent access.
MCP endpoint
https://back.guruwalk.com/mcpStreamable HTTP transport. This is the MCP endpoint, not a website — paste it into your MCP client server list rather than a browser.
Captured passively during the read-only scan. Click any value to find servers that match it.
The tools this server advertises via tools/list — names, purposes, and the parameters each accepts, exactly as enumerated read-only.
Search a city to explore free walking tours and paid activities on GuruWalk, the world's largest free walking tour platform. Returns destination info, tour categories (free tours, food tours, day trip
Browse tours and activities within a specific category for a destination on GuruWalk. Categories include free walking tours, food tours, bike tours, day trips, skip-the-line tickets, and more. Returns
Sorted worst-first. Each finding shows its severity, what it means, its OWASP MCP Top-10 mapping, and a recommended fix — the check id links to the exact methodology row that produced it.
tool: search_tours_activities_by_destination
A tool exposes a free-text/webhook/feedback parameter with no honest purpose — a classic exfil channel.
CH AGAINST, all tokens must appear as prefix, tokens of <3 chars ignorRecommendationRemove side-channel parameters; constrain tool inputs.
tool: search_tours_activities_by_destination
A tool description tries to alter the model’s use of another tool.
r the city (e.g. 'eiffel tower' → Paris, 'colosseum' → Rome, 'sagrada famiRecommendationDescriptions must describe only their own tool.
tool: get_tours_activities_by_category
A tool description tries to alter the model’s use of another tool.
IDs returned by search_tours_activities_by_destination — never invent category IDs. Use this tool to dRecommendationDescriptions must describe only their own tool.
tool: discover_destination
A tool exposes a free-text/webhook/feedback parameter with no honest purpose — a classic exfil channel.
CH AGAINST, all tokens must appear as prefix, tokens of <3 chars ignorRecommendationRemove side-channel parameters; constrain tool inputs.
tool: discover_destination
A tool description tries to alter the model’s use of another tool.
Deprecated: use search_tours_activities_by_destinationRecommendationDescriptions must describe only their own tool.
tool: browse_category
A tool description tries to alter the model’s use of another tool.
Deprecated: use get_tours_activities_by_categoryRecommendationDescriptions must describe only their own tool.
tool: check_availability
A tool description tries to alter the model’s use of another tool.
Deprecated: use get_product_availabilityRecommendationDescriptions must describe only their own tool.
tool: get_product_detail
A tool description tries to alter the model’s use of another tool.
tead of invoking this tool several times. Each successful entry returns deRecommendationDescriptions must describe only their own tool.
tool: get_product_detail
The text tells the model WHEN to call this tool relative to others ("always call first", "before any other tool", "chain to X tool") — a toxic-flow injection that hijacks the agent’s orchestration rather than describing the tool.
lated question. Always call this tool BEFORE answering questions about a specific tour — nevRecommendationTool metadata must describe only the tool, never sequence the agent’s calls.
tool: show_tours_activities
A tool description tries to alter the model’s use of another tool.
d of waiting to be asked. Don't re-render a selection you already showed uRecommendationDescriptions must describe only their own tool.
The server accepts tool enumeration (and likely invocation) with no authentication.
RecommendationRequire OAuth 2.1 authorization for any server exposing non-public tools.
tool: search_tours_activities_by_destination
The server advertises open-world / broadly-scoped capabilities.
annotations.openWorldHint = trueRecommendationScope tools to the minimum needed.
tool: get_tours_activities_by_category
The server advertises open-world / broadly-scoped capabilities.
annotations.openWorldHint = trueRecommendationScope tools to the minimum needed.
tool: get_product_availability
The server advertises open-world / broadly-scoped capabilities.
annotations.openWorldHint = trueRecommendationScope tools to the minimum needed.
tool: discover_destination
The server advertises open-world / broadly-scoped capabilities.
annotations.openWorldHint = trueRecommendationScope tools to the minimum needed.
tool: browse_category
The server advertises open-world / broadly-scoped capabilities.
annotations.openWorldHint = trueRecommendationScope tools to the minimum needed.
tool: check_availability
The server advertises open-world / broadly-scoped capabilities.
annotations.openWorldHint = trueRecommendationScope tools to the minimum needed.
tool: get_product_detail
The server advertises open-world / broadly-scoped capabilities.
annotations.openWorldHint = trueRecommendationScope tools to the minimum needed.
tool: show_tours_activities
The server advertises open-world / broadly-scoped capabilities.
annotations.openWorldHint = trueRecommendationScope tools to the minimum needed.
tool: get_support_guide
The server advertises open-world / broadly-scoped capabilities.
annotations.openWorldHint = trueRecommendationScope tools to the minimum needed.
tool: get_product_detail
An unusually long description is a common injection-padding tactic.
description length 2028 charsRecommendationKeep descriptions concise.
tool: get_support_guide
An unusually long description is a common injection-padding tactic.
description length 2037 charsRecommendationKeep descriptions concise.
The server exposes one or more ui:// (MCP Apps) resources whose HTML/JS renders inside the host client — a client-side injection / data-exposure surface most scanners ignore. Flagged for review, not damning on its own.
1 ui:// resource(s); e.g. ui://guruwalk/show-tours-activities.html?v=17RecommendationReview each ui:// resource’s markup and scripts; treat host-rendered UI as untrusted, sandbox it, and never expose secrets or conversation context to it.
Vantaj uptime monitoring via MCP — manage monitors, heartbeats, incidents, and status pages.
Unified gateway to Algeria's TKAWEN ecosystem: commerce, certification, and AI tools.
Provides access to the Cohereon Doctrine AI safety framework with governance components, tiered access, and agent onboarding.
Agentic rails for complex workflows with receipts, fees, and MCP tool access.
Structural TC39 spec lookup for ECMA-262 and ECMA-402 in AI agents, SHA-pinned and offline-first.
Structural TC39 spec lookup for ECMA-262 and ECMA-402 in AI agents, SHA-pinned and offline-first.
Affiliate integration for GuruWalk free walking tours. Discover destinations, browse tour categories, check availability, and generate attributed booking links across 100+ countries.
Check real-time availability for one or more tours or activities on GuruWalk in a single call. Pass an `items` array — each entry is independent and has its own type, product_id and date range. Return
Deprecated: use search_tours_activities_by_destination
Deprecated: use get_tours_activities_by_category
Deprecated: use get_product_availability
Get the full detail of one or more tours or activities on GuruWalk in a single call. Pass an `items` array — each entry has its own type, product_id and language, and is processed independently. Retur
Present a selection of tours or activities to the traveler as a visual list of cards (photo, rating, price, booking button) rendered inline in the conversation. Showing cards is the default way to pre
Returns an official GuruWalk support guide for a specific traveler-support topic. GuruWalk is a platform for free walking tours and paid activities; these guides are GuruWalk's own source of truth on