All servers · Payments & accounting · Agent payments (x402)

SpendPreflight

io.github.spendpreflight/spendpreflight · v1.0.0

Measured by MCP Station

Description written by the publisher, not verified

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

Connect

claude mcp add --transport http spendpreflight https://api.spendpreflight.com/mcp

{
  "mcpServers": {
    "spendpreflight": {
      "url": "https://api.spendpreflight.com/mcp"
    }
  }
}

Tools as reported by the server

• 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

Tool changes

• 2026-10-24: listing_guard, check_listing, find_rv_stations, size_solar, check_token, lint_endpoint, check_payee, preflight_payment, check_endpoint, get_service_info
• 2026-10-23: listing_guard, find_rv_stations, size_solar, check_token, lint_endpoint, check_payee, preflight_payment, check_endpoint, get_service_info
• 2026-10-19: lint_endpoint, check_payee, preflight_payment, check_endpoint, get_service_info
• 2026-10-16: check_payee, preflight_payment, check_endpoint, get_service_info

Website · JSON · Text for agents · Registry updated 2026-10-06