Loading…
List, sell, show, compare, and close real estate transactions on Beycome.
Do not connect
A critical issue was found. Do not connect this server as-is.
Scanned 1 month 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 com.beycome/listing MCP server exposes 14 tools, focused primarily on communication capabilities. Its published description reads: "List, sell, show, compare, and close real estate transactions on Beycome". It communicates over Streamable HTTP using the 2025-06-18 protocol revision, and does not require authorization to connect. MCPGrade currently rates com.beycome/listing 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 com.beycome/listing's advertised tools, transport security, and authorization posture before connecting an autonomous agent or sharing sensitive context with it.
Add com.beycome/listing to an MCP client using the endpoint below. Review the grade and findings above before granting an autonomous agent access.
MCP endpoint
https://mcp.beycome.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.
Account stage — register a new beycome user (POST /auth/register). Use when the owner has no account yet. beycome is passwordless: registering automatically emails the user a 6-digit sign-in code, so
Account stage — send a one-time sign-in code (POST /auth/check-email). beycome is passwordless — never ask the user for a password. This emails the user a 6-digit code (a second, different code also g
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: beycome_signup
A tool exposes a free-text/webhook/feedback parameter with no honest purpose — a classic exfil channel.
yet. beycome is passwordless: registering automatically emails the userRecommendationRemove side-channel parameters; constrain tool inputs.
tool: beycome_signup
A tool description tries to alter the model’s use of another tool.
— do NOT call `beycome_signin_start` after signup, the code is already on its way.RecommendationDescriptions must describe only their own tool.
tool: beycome_signin_start
A tool exposes a free-text/webhook/feedback parameter with no honest purpose — a classic exfil channel.
l). beycome is passwordless — never ask the user for a password. This eRecommendationRemove side-channel parameters; constrain tool inputs.
tool: beycome_signin_start
A tool description tries to alter the model’s use of another tool.
his email; run `beycome_signup` instead (signup also sends a code). - HTRecommendationDescriptions must describe only their own tool.
tool: beycome_signin_verify
A tool exposes a free-text/webhook/feedback parameter with no honest purpose — a classic exfil channel.
me code for the access_token (POST /auth/validate-code). The gateway to theRecommendationRemove side-channel parameters; constrain tool inputs.
tool: beycome_signin_verify
A tool description tries to alter the model’s use of another tool.
d of asking the user to sign in again — that is what makes autonomous workRecommendationDescriptions must describe only their own tool.
tool: beycome_estimate
A tool description tries to alter the model’s use of another tool.
RecommendationDescriptions must describe only their own tool.
tool: beycome_rental_estimate
A tool description tries to alter the model’s use of another tool.
ed. Pairs with `beycome_estimate`, but this tool is SPECIFICALLY for rental estiRecommendationDescriptions must describe only their own tool.
tool: beycome_comps
A tool description tries to alter the model’s use of another tool.
cing alongside `beycome_estimate`. Slow endpoint: a cold query can take up to ~RecommendationDescriptions must describe only their own tool.
tool: beycome_questionnaire_link
A tool exposes a free-text/webhook/feedback parameter with no honest purpose — a classic exfil channel.
inly: 403 — the token is not the owner's; 422 — the listing is not paRecommendationRemove side-channel parameters; constrain tool inputs.
tool: beycome_questionnaire_link
A tool description tries to alter the model’s use of another tool.
property page (`beycome_submit_property_link`) or already had a paid listing with the questiRecommendationDescriptions must describe only their own tool.
tool: beycome_questionnaire_link
The input schema declares a parameter that asks the caller to hand over a password, key, token, or other secret — a credential-harvest / token-passthrough risk. (Bare pagination `token` params are excluded.)
parameter "access_token"RecommendationNever pass secrets as tool arguments; authenticate out-of-band and remove credential parameters from the schema.
tool: beycome_submit_property_link
A tool exposes a free-text/webhook/feedback parameter with no honest purpose — a classic exfil channel.
bad/unverified token. This page is THE way to create a listing — thRecommendationRemove side-channel parameters; constrain tool inputs.
tool: beycome_submit_property_link
A tool description tries to alter the model’s use of another tool.
ER signing in (`beycome_signin_verify`). User-scoped — no prop_id exists yet. ReturnsRecommendationDescriptions must describe only their own tool.
tool: beycome_submit_property_link
The input schema declares a parameter that asks the caller to hand over a password, key, token, or other secret — a credential-harvest / token-passthrough risk. (Bare pagination `token` params are excluded.)
parameter "access_token"RecommendationNever pass secrets as tool arguments; authenticate out-of-band and remove credential parameters from the schema.
tool: beycome_get_my_listings
A tool exposes a free-text/webhook/feedback parameter with no honest purpose — a classic exfil channel.
/properties). Token-scoped RESO list endpoint on the normal api basRecommendationRemove side-channel parameters; constrain tool inputs.
tool: beycome_get_my_listings
A tool description tries to alter the model’s use of another tool.
`prop_id`` for `beycome_questionnaire_link`. - As the entry point for a returning user wRecommendationDescriptions must describe only their own tool.
tool: beycome_get_my_listings
The input schema declares a parameter that asks the caller to hand over a password, key, token, or other secret — a credential-harvest / token-passthrough risk. (Bare pagination `token` params are excluded.)
parameter "access_token"RecommendationNever pass secrets as tool arguments; authenticate out-of-band and remove credential parameters from the schema.
tool: beycome_offers
A tool exposes a free-text/webhook/feedback parameter with no honest purpose — a classic exfil channel.
ive. Requires ``access_token``. Returns a paginated list (20 per page; passRecommendationRemove side-channel parameters; constrain tool inputs.
tool: beycome_offers
The input schema declares a parameter that asks the caller to hand over a password, key, token, or other secret — a credential-harvest / token-passthrough risk. (Bare pagination `token` params are excluded.)
parameter "access_token"RecommendationNever pass secrets as tool arguments; authenticate out-of-band and remove credential parameters from the schema.
tool: beycome_showings
A tool exposes a free-text/webhook/feedback parameter with no honest purpose — a classic exfil channel.
{"properties":{"access_token":{"description":"Bearer access token from beycoRecommendationRemove side-channel parameters; constrain tool inputs.
tool: beycome_showings
The input schema declares a parameter that asks the caller to hand over a password, key, token, or other secret — a credential-harvest / token-passthrough risk. (Bare pagination `token` params are excluded.)
parameter "access_token"RecommendationNever pass secrets as tool arguments; authenticate out-of-band and remove credential parameters from the schema.
tool: beycome_messages
A tool exposes a free-text/webhook/feedback parameter with no honest purpose — a classic exfil channel.
nly. Requires ``access_token``. Two modes: - Omit ``thread`` → lists the ~RecommendationRemove side-channel parameters; constrain tool inputs.
tool: beycome_messages
A tool description tries to alter the model’s use of another tool.
henticate with `beycome_signin_start` then `beycome_signin_verify`. To answer a messRecommendationDescriptions must describe only their own tool.
tool: beycome_messages
The input schema declares a parameter that asks the caller to hand over a password, key, token, or other secret — a credential-harvest / token-passthrough risk. (Bare pagination `token` params are excluded.)
parameter "access_token"RecommendationNever pass secrets as tool arguments; authenticate out-of-band and remove credential parameters from the schema.
tool: beycome_reply_message
A tool exposes a free-text/webhook/feedback parameter with no honest purpose — a classic exfil channel.
essage``, and ``access_token``. For a threaded reply pass the original ``thrRecommendationRemove side-channel parameters; constrain tool inputs.
tool: beycome_reply_message
A tool description tries to alter the model’s use of another tool.
henticate with `beycome_signin_start` then `beycome_signin_verify`.RecommendationDescriptions must describe only their own tool.
tool: beycome_reply_message
The input schema declares a parameter that asks the caller to hand over a password, key, token, or other secret — a credential-harvest / token-passthrough risk. (Bare pagination `token` params are excluded.)
parameter "access_token"RecommendationNever pass secrets as tool arguments; authenticate out-of-band and remove credential parameters from the schema.
tool: (server instructions)
A tool exposes a free-text/webhook/feedback parameter with no honest purpose — a classic exfil channel.
timates, comps, passwordless sign-in, listing links (create a listing anRecommendationRemove side-channel parameters; constrain tool inputs.
tool: (server instructions)
A tool description tries to alter the model’s use of another tool.
d of repeating the sign-in flow — this lets you act on the user's beycomeRecommendationDescriptions 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: beycome_signup
The server advertises open-world / broadly-scoped capabilities.
no annotations on write-capable tool "beycome_signup"RecommendationScope tools to the minimum needed.
tool: beycome_signin_start
The server advertises open-world / broadly-scoped capabilities.
no annotations on write-capable tool "beycome_signin_start"RecommendationScope tools to the minimum needed.
tool: beycome_signin_verify
The server advertises open-world / broadly-scoped capabilities.
no annotations on write-capable tool "beycome_signin_verify"RecommendationScope tools to the minimum needed.
tool: beycome_estimate
The server advertises open-world / broadly-scoped capabilities.
no annotations on write-capable tool "beycome_estimate"RecommendationScope tools to the minimum needed.
tool: beycome_rental_estimate
The server advertises open-world / broadly-scoped capabilities.
no annotations on write-capable tool "beycome_rental_estimate"RecommendationScope tools to the minimum needed.
tool: beycome_questionnaire_link
The server advertises open-world / broadly-scoped capabilities.
no annotations on write-capable tool "beycome_questionnaire_link"RecommendationScope tools to the minimum needed.
tool: beycome_submit_property_link
The server advertises open-world / broadly-scoped capabilities.
no annotations on write-capable tool "beycome_submit_property_link"RecommendationScope tools to the minimum needed.
tool: beycome_get_my_listings
The server advertises open-world / broadly-scoped capabilities.
no annotations on write-capable tool "beycome_get_my_listings"RecommendationScope tools to the minimum needed.
tool: beycome_offers
The server advertises open-world / broadly-scoped capabilities.
no annotations on write-capable tool "beycome_offers"RecommendationScope tools to the minimum needed.
tool: beycome_showings
The server advertises open-world / broadly-scoped capabilities.
no annotations on write-capable tool "beycome_showings"RecommendationScope tools to the minimum needed.
tool: beycome_messages
The server advertises open-world / broadly-scoped capabilities.
no annotations on write-capable tool "beycome_messages"RecommendationScope tools to the minimum needed.
tool: beycome_reply_message
The server advertises open-world / broadly-scoped capabilities.
no annotations on write-capable tool "beycome_reply_message"RecommendationScope tools to the minimum needed.
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.
Account stage — exchange the one-time code for the access_token (POST /auth/validate-code). The gateway to the listing flow. Call after `beycome_signin_start` or `beycome_signup` (both send the code)
Discovery stage — is this state served by beycome MLS? (GET /mls/is-covered). No account or prop_id needed. Use before listing to confirm beycome operates in the property's state; ``is_active: true``
Discovery stage — estimate a property's SALE value (beycome CMA + Zillow Zestimate). No account or prop_id needed. Returns both estimates plus suggested pricing strategies (fast / balanced / max). Use
Discovery stage — estimate a property's monthly RENT (POST /gemini-estimate). No account or prop_id needed. Pairs with `beycome_estimate`, but this tool is SPECIFICALLY for rental estimates: use it ON
Discovery stage — sold comparable listings near a location (GET /comps). No account or prop_id needed. Supports price / beds / baths / area / lot / type filters. Use during discovery to support pricin
Questionnaire stage — mint a pre-authorized link to the MLS questionnaire form (POST /api/mls/questionnaire-link). Requires a PAID listing (premium active, Flat/Yes) — whether the user just paid on th
Listing-creation stage — mint a pre-authorized link to the submit-property page (POST /api/mls/submit-property-link). Call AFTER signing in (`beycome_signin_verify`). User-scoped — no prop_id exists y
Recovery stage — the signed-in user's properties (GET /properties). Token-scoped RESO list endpoint on the normal api base. Two main uses: - After the user finishes the submit-property page (`beycome_
Post-publish stage — offers received on the owner's listings (GET /offers). Used once a listing is live. Requires ``access_token``. Returns a paginated list (20 per page; pass ``page`` to advance) of
Post-publish stage — calendar of showings, open houses, and offer deadlines (GET /calendar/events). Used once a listing is live. The API requires the date range, so it defaults to today → +90 days whe
Post-publish stage — read the owner's buyer/inquiry messages (GET /messages). Read-only. Requires ``access_token``. Two modes: - Omit ``thread`` → lists the ~20 most recent conversations, newest first
Post-publish stage — reply to a buyer/inquiry message (POST /messages/reply). Sends a real message and queues a real email notification to the recipient, so the text you send is final — treat this as