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Pay-per-call data tools for AI agents on Base, priced via x402 USDC micropayments.
Do not connect
A critical issue was found. Do not connect this server as-is.
Scanned 8 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 xsignal MCP server exposes 6 tools, focused primarily on general-purpose capabilities. Its published description reads: "Pay-per-call data tools for AI agents on Base, priced via x402 USDC micropayments". It communicates over Streamable HTTP using the 2026-07-28 protocol revision, and does not require authorization to connect. MCPGrade currently rates xsignal F — a critical issue was found and the server should not be connected as-is. Its most notable findings include "Data-exfiltration parameters" and "Data-exfiltration parameters". 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 xsignal's advertised tools, transport security, and authorization posture before connecting an autonomous agent or sharing sensitive context with it.
Add xsignal to an MCP client using the endpoint below. Review the grade and findings above before granting an autonomous agent access.
MCP endpoint
https://xsignal-production.up.railway.app/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.
FLAGSHIP. An outcome-priced momentum verdict that ABSTAINS below your confidence bar - the only x402 signal that refuses to answer (honestly) when it is not sure. Post {addr, min_confidence 0-1} then
A fused MEAL: one call combines Base token market intel + real-time social signal into a single "what is happening with $TOKEN right now" brief - market flags + top CITED social posts + a plain-langua
Real-time X/social signal for a topic: scored (virality + freshness) and CITED (source urls), deduped and ranked. Input: query (topic) OR candidates[] (bring your own posts to score). x402-paid at GET
Base token MARKET data (liquidity, 24h volume, price + change, pool age, buy/sell flow, mechanical flags) from public DEX pools. Market data, NOT a trust/safety rating. Best used as an input to get_to
The Base PREFLIGHT: one call fuses MainStreet on-chain SAFETY (SAFE/WATCH/AVOID + rug flags) with xsignal MOMENTUM (the abstaining read) into a single recommendation (GO / CAUTION / AVOID / AVOID_ENTR
BATCH watchlist screen: run the preflight (safety ⊕ momentum) over up to 10 Base tokens in one call → which are GO (safe + moving), plus a per-token verdict + a summary count. For an agent screening a
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: get_intent
A tool exposes a free-text/webhook/feedback parameter with no honest purpose — a classic exfil channel.
ption":"0x Base token address to read momentum for"},"min_confidence"RecommendationRemove side-channel parameters; constrain tool inputs.
tool: get_token_brief
A tool exposes a free-text/webhook/feedback parameter with no honest purpose — a classic exfil channel.
l combines Base token market intel + real-time social signal into a sRecommendationRemove side-channel parameters; constrain tool inputs.
tool: get_signal
A tool description tries to alter the model’s use of another tool.
RecommendationDescriptions must describe only their own tool.
tool: get_token_intel
A tool exposes a free-text/webhook/feedback parameter with no honest purpose — a classic exfil channel.
oken_intel Base token MARKET data (liquidity, 24h volume, price + chaRecommendationRemove side-channel parameters; constrain tool inputs.
tool: get_token_intel
A tool description tries to alter the model’s use of another tool.
as an input to get_token_brief. x402-paid at GET/POST /token ($0.01; 3 free peRecommendationDescriptions must describe only their own tool.
tool: get_preflight
A tool exposes a free-text/webhook/feedback parameter with no honest purpose — a classic exfil channel.
wering "is this token safe to touch AND moving?". Safety GATES momentRecommendationRemove side-channel parameters; constrain tool inputs.
tool: get_screen
A tool exposes a free-text/webhook/feedback parameter with no honest purpose — a classic exfil channel.
r up to 10 Base tokens in one call → which are GO (safe + moving), pluRecommendationRemove side-channel parameters; constrain tool inputs.
The server accepts tool enumeration (and likely invocation) with no authentication.
RecommendationRequire OAuth 2.1 authorization for any server exposing non-public tools.
tool: get_intent
The server advertises open-world / broadly-scoped capabilities.
no annotations on write-capable tool "get_intent"RecommendationScope tools to the minimum needed.
tool: get_token_brief
The server advertises open-world / broadly-scoped capabilities.
no annotations on write-capable tool "get_token_brief"RecommendationScope tools to the minimum needed.
tool: get_signal
The server advertises open-world / broadly-scoped capabilities.
no annotations on write-capable tool "get_signal"RecommendationScope tools to the minimum needed.
tool: get_token_intel
The server advertises open-world / broadly-scoped capabilities.
no annotations on write-capable tool "get_token_intel"RecommendationScope tools to the minimum needed.
tool: get_preflight
The server advertises open-world / broadly-scoped capabilities.
no annotations on write-capable tool "get_preflight"RecommendationScope tools to the minimum needed.
tool: get_screen
The server advertises open-world / broadly-scoped capabilities.
no annotations on write-capable tool "get_screen"RecommendationScope tools to the minimum needed.
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