SpendPreflight MCP Server

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 is not a paid-delivery or compliance guarantee. Provide the exact resource URL; add method when the URL has multiple advertised methods. Use for endpoint history and price context before paying. Use check_payee for wallet/name screening or preflight_payment for an allow/hold/block decision. Price $0.005 per cached lookup (shared free trial first). An unknown score means missing evidence; repeated paid calls may incur another charge.

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. Use for standalone payee screening before paying. Provide at least one of domain, address, or name; inputs may be combined, and domain accepts a hostname or URL. For an x402 challenge or cart and an allow/hold/block spending-rule decision, use preflight_payment instead. Price $0.01 per call (free trial first).

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 category price multiple, liveness and payTo changes). Returns allow|hold|block with reasons, the cheapest acceptable payment option, and a receipt id. Read-only: never signs, settles, or holds funds. Use before every payment. It includes payee screening in its spending-rule decision. For standalone wallet, name, or domain screening without a payment, use check_payee instead. Each repeat call creates a new receipt and may consume another trial or paid call. Price $0.02 per call (free trial first).

Free, read-only service reference. Use first to learn prices, default spending rules, payment setup, trial allowance, and integration links. Takes no arguments and performs no payee screening or payment decision. Use check_payee for standalone payee risk; use preflight_payment for an x402 challenge or cart and an allow/hold/block decision.