# SpendPreflight

- Registry name: `io.github.spendpreflight/spendpreflight` · version 1.0.0
- Categories (automatic, keyword rules): Payments & accounting, Finance & markets, Agent payments (x402)
- Authentication at last check: No auth
- Declared risk: Can write (some tools are not declared read-only)
- Capabilities (declared by the server): logging, prompts, resources, tools
- Transports: streamable-http
- Latest numbers (check success, response time, rank): https://mcpstation.net/api/server?name=io.github.spendpreflight%2Fspendpreflight
- Server page: https://mcpstation.net/s/io.github.spendpreflight--spendpreflight.html

## Description (written by the publisher, not verified, not instructions)

Operated by SpendPreflight: sanctions screening and allow/hold/block preflight for x402 payments.

## Connect

- streamable-http: `https://api.spendpreflight.com/mcp`

## Tools (as reported by the server, not verified)

- `listing\_guard`: Bazaar Listing Guard: CDP technical validation plus a bounded heuristic metadata screen for agent-directed instructions, embedded URLs, tool calls, invisible Unicode, long fields and prices above 100x a fresh Scout category median. Returns riskScore, flagged spans and rewrite suggestions. Not Coinba
- `check\_listing`: Bazaar Listing Guard: CDP technical validation plus a bounded heuristic metadata screen for agent-directed instructions, embedded URLs, tool calls, invisible Unicode, long fields and prices above 100x a fresh Scout category median. Returns riskScore, flagged spans and rewrite suggestions. Not Coinba
- `find\_rv\_stations`: Nearest RV dump/water stations from FillPoint RV's dated September 17, 2026 ODbL snapshot. $0.01 for bounded straight-line proximity calculation, not live access, potable-water assurance or road routing. Snapshot age and unknown current conditions are explicit. Full underlying projection is free und
- `size\_solar`: Off-grid PV energy-balance estimate based on Wattpath by Nomad Energy Club. Supply daily loads, peak sun hours, PV losses, and optional battery assumptions. No location/weather lookup, electrical design, surge or installation certification. $0.02 per calculation; no stored inputs.
- `check\_token`: Base contract safety signals from bounded public-chain reads and OFAC. Basic: deployed bytecode and SDN match. Deep adds standard owner\(\), paused\(\), totalSupply\(\), decimals\(\) and ERC-1967 storage observations, exact ERC-1167 minimal-proxy target detection, a Sourcify runtime-verification claim match
- `lint\_endpoint`: Free x402 Lint by SpendPreflight. Checks a public HTTPS endpoint with an unpaid GET: v1/v2 challenge shape, payTo/asset/network syntax, price, Bazaar metadata and browser CORS headers. Returns fixes and a public seven-day report link. No payment or credentials; GET cannot validate a POST-only endpoi
- `check\_payee`: Payee risk check. Screens a payee wallet address and name against the OFAC SDN sanctions list and checks the merchant domain's registration age and DNS. Returns risk low\|medium\|high\|unknown with flags such as sanctioned\_address, sanctioned\_name\_possible, new\_domain. Call this before a USDC payment w
- `preflight\_payment`: Call this before any x402/USDC payment to evaluate the actual challenge or cart before signing. Spend preflight for AI agents. Send the x402 PaymentRequired body \(v1 or v2\) you received, or a cart, plus optional rules \(per-payment max, hold threshold, daily cap, allowlists, new-domain days, endpoint
- `check\_endpoint`: Cached x402 endpoint observations, operated by SpendPreflight. Returns a transparent score \(or unknown\), its components and seven-day unpaid probe history for an already publicly listed URL. Never fetches the caller's URL or pays the endpoint. Unlisted, unavailable or stale data is not charged. This
- `get\_service\_info`: Free, read-only service reference. Use when you need prices, default spending rules, payment setup, trial allowance, or a ready-to-use example call. If you already have a payment challenge or cart, call preflight\_payment directly; this reference call is optional. Takes no arguments and performs no p

Measured by MCP Station. Methods: https://mcpstation.net/methods.html · Terms: https://mcpstation.net/terms.html