In-depth architectural comparison of the Q402 MCP and Sandbox as a Service MCP servers. Compare execution transports, security boundaries, tool capabilities, quality scores, and ready-to-paste client installation snippets for Claude, Cursor, Windsurf, and VS Code.
At a Glance & Executive Verdict
Q402 MCP
Code Execution · Local stdio
Quality: 52/100 (Good) | Auth: No auth required
Sandbox as a Service
Code Execution · Local stdio
Quality: 45/100 (Fair) | Auth: No auth required
Verdict Summary: Choose Q402 MCP if you need specialized Code Execution tools running via a local process. Choose Sandbox as a Service if your workspace requires Code Execution integration with local subprocess execution. Both servers can be configured concurrently in your client's mcpServers manifest.
Which MCP Server Should You Choose?
Q
Choose Q402 MCP when:
You need dedicated capabilities in the Code Execution domain.
You prefer local stdio subprocess transport architecture.
Your security boundary fits: No auth required (Free / Open Source).
Single-recipient gasless transfer. Sandbox by default. In live mode, automatically runs a trust-check ($0.02) on the recipient before each payment when it is a first-time counterparty or the amount ≥ $1; verdict cached 7 days (no double-charge within TTL). Degrades to free basic verdict only when w…
q402_batch_pay
Up to 20 recipients per call. Trial: 5 - applies when paying with your own key (Mode A/B); server-managed Agent Wallet (Mode C) batch is paid Multichain-only. Same auto-routing as `q402_pay`. 6+ BNB batches with Trial set return `status="ambiguous"` so the agent asks how to split. xlayer + stable n…
Ready-to-Paste Client Configurations
Paste either (or both) of these JSON server blocks into your client config file (e.g. claude_desktop_config.json or ~/.cursor/mcp.json).
Q402 MCP is categorized under Code Execution and uses a local stdio subprocess. In contrast, Sandbox as a Service belongs to Code Execution using local stdio subprocess. Select Q402 MCP when you need capabilities focused on code execution and Sandbox as a Service when you require tools for code execution.
Fetch + locally verify a Trust Receipt (`rct_…` id, ECDSA against the relayer EOA).
q402_wallet_status
Per-chain EIP-7702 state for the EOA derived from `Q402_PRIVATE_KEY`.
q402_clear_delegation
Clear EIP-7702 delegation (Mode A/B local key OR Mode C api key, server-signed). Sponsored on every chain except Ethereum (billed to your Gas Tank). Two-phase consent (`consentToken`).
q402_agentic_info
Agent Wallet info (addresses, per-wallet caps, daily-spend used, ERC-8004 id). Drives Mode C.
q402_memory_summary
Treasury overview over a window: USD-stablecoin spend by chain/source, top vendors, schedules, open requests/escrow, failures. Read-only.
q402_vendor_history
Total paid to one vendor (or a vendor leaderboard) with recurring cadence. Read-only.
q402_agent_spend_report
Per-Agent-Wallet spend with each wallet's caps. Read-only.
+39 more tools listed on main page
Sandbox as a Service Tools (0)
No explicit tool names declared in metadata yet. Check project README on main listing page.