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Executes x402 payment-gated tasks with signed receipts and Filecoin proofs via MCP.
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 yieldagentx402 MCP server exposes 19 tools, focused primarily on developer and communication capabilities. Its published description reads: "Executes x402 payment-gated tasks with signed receipts and Filecoin proofs via MCP". It communicates over Streamable HTTP using the 2026-07-28 protocol revision, and does not require authorization to connect. MCPGrade currently rates yieldagentx402 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 yieldagentx402's advertised tools, transport security, and authorization posture before connecting an autonomous agent or sharing sensitive context with it.
Add yieldagentx402 to an MCP client using the endpoint below. Review the grade and findings above before granting an autonomous agent access.
MCP endpoint
https://api.yieldagentx402.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.
Returns every tool available on this server, what each one does, and when to use it. Call this first when connecting to understand the platform.
Runs any agent action — email, API call, on-chain tx, or workflow — with policy enforcement and TEE attestation. Returns a run ID, policy decision, and signed Filecoin-anchored receipt.
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: yax_run_secure_workflow
A tool exposes a free-text/webhook/feedback parameter with no honest purpose — a classic exfil channel.
parameter "webhook_url"RecommendationRemove side-channel parameters; constrain tool inputs.
tool: yax_process_x402_payment
A tool exposes a free-text/webhook/feedback parameter with no honest purpose — a classic exfil channel.
y spend cap."},"token":{"type":"string","description":"Token symbol tRecommendationRemove side-channel parameters; constrain tool inputs.
tool: yax_verify_receipt
A tool description tries to alter the model’s use of another tool.
RecommendationDescriptions 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: yax_run_secure_workflow
The server advertises open-world / broadly-scoped capabilities.
annotations.destructiveHint = trueRecommendationScope tools to the minimum needed.
tool: yax_delegate_to_agent
The server advertises open-world / broadly-scoped capabilities.
annotations.destructiveHint = trueRecommendationScope tools to the minimum needed.
tool: yax_process_x402_payment
The server advertises open-world / broadly-scoped capabilities.
annotations.destructiveHint = trueRecommendationScope tools to the minimum needed.
tool: yax_verify_receipt
The server advertises open-world / broadly-scoped capabilities.
annotations.openWorldHint = trueRecommendationScope tools to the minimum needed.
tool: yax_control_workflow
The server advertises open-world / broadly-scoped capabilities.
annotations.destructiveHint = trueRecommendationScope tools to the minimum needed.
tool: yax_score_leads
The server advertises open-world / broadly-scoped capabilities.
annotations.openWorldHint = trueRecommendationScope tools to the minimum needed.
tool: yax_enrich_lead_data
The server advertises open-world / broadly-scoped capabilities.
annotations.openWorldHint = trueRecommendationScope tools to the minimum needed.
tool: yax_build_email_sequence
The server advertises open-world / broadly-scoped capabilities.
annotations.openWorldHint = trueRecommendationScope tools to the minimum needed.
tool: yax_monitor_churn_risk
The server advertises open-world / broadly-scoped capabilities.
annotations.openWorldHint = trueRecommendationScope tools to the minimum needed.
tool: yax_collect_ar_invoices
The server advertises open-world / broadly-scoped capabilities.
annotations.openWorldHint = trueRecommendationScope 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.
Delegates work to another agent by spawning a child orchestration run linked to your parent run. Optional hireFeeUsd triggers policy-gated x402 or ledger hire payment. Child runs inherit min(parent, c
Sends an x402 payment to any EVM, NEAR, or Stacks address. Validates against your spend cap before signing. Returns transaction hash and signed receipt.
Checks if an action would be approved by your policy without running it. Returns approved/denied, remaining spend cap, and whether human approval is required.
Fetches the full signed receipt for any past run. Returns policy result, TEE attestation, input/output hashes, and Filecoin + BTFS proof CIDs.
Confirms a receipt's cryptographic signature is valid and its Filecoin anchor exists. Returns verified: true/false, signature status, and anchor CIDs.
Lists recent agent runs with status and policy result. Filter by outcome (approved/denied/escalated) to audit activity or find run IDs for receipt lookup.
Approve or deny a pending policy approval token for the authenticated agent.
Stop (cancel) or resume (approve human gate) an orchestration workflow run for this agent.
Returns the agent's wallet balance, spend cap, remaining cap for this period, and wallet address. Use before a payment to confirm funds are available.
Scores inbound leads by conversion likelihood and syncs enriched records to your CRM. Returns each lead with a score (0–100), tier (hot/warm/cold), and enrichment data.
Parses a raw lead email, form submission, or webhook payload into a structured contact record, enriches it, and logs it to your CRM. Returns name, email, company, phone, and ICP score.
Builds a personalized cold email sequence for a list of prospects. Researches each prospect and writes tailored copy. Returns subject lines, body, and send schedule per prospect.
Flags customers at risk of churning based on usage and payment patterns, and drafts a re-engagement email per account. Returns a prioritized risk list with churn score and outreach copy.
Checks whether the TEE enclave is operational. Returns enclave status, the verifiable mrEnclave hash, and timestamp of last attestation. Use before high-value actions.
Audits recent agent activity against your policy rules and flags violations. Returns compliant vs flagged run counts, violation details, and a Filecoin-anchored compliance report CID.
Analyzes open invoices by age (30/60/90+ days) and sends escalating follow-up emails to overdue clients. Returns invoice count, total overdue amount, and emails sent per bucket.
Generates a week-by-week cash flow forecast across base, optimistic, and pessimistic scenarios. Returns inflow/outflow projections and a Filecoin-anchored report CID for board or lender use.