What x402station.io documents
x402station.io describes a continuously probed endpoint risk-signal service. Its published specification covers Preflight, seven-day Forensics, Watch webhooks and provider certificates. Its vocabulary includes unavailable endpoints, extreme prices, price changes and uncertain history. These are its documented signals, not findings we independently reproduced.
The API page lists Preflight at $0.001 USDC per call and a rate-limited free trial. Its Guard guide also describes npm middleware, MCP tools and prepaid credits. Read its current terms, quote and integration behavior before authorizing payment.
What SpendPreflight offers
Our free x402 Lint inspects an unpaid public challenge and produces a dated heuristic report. Its passive Security Check summary reports observable configuration and unknown areas; it does not execute replay or settlement attacks. The full Security Check costs 0.10 USDC and requires an existing complete, current Lint snapshot.
Quote Check costs 0.001 USDC for a usable comparison of a supplied quote with comparable cached observations; unknown is free. It compares amount, network, asset, recipient and method without fetching the seller. The evidence source, observation time and count matter. It is not a market price or payment approval.
| Need | SpendPreflight | x402station.io |
|---|---|---|
| Before-payment evidence | Quote comparison, explicit spending rules and payee screening; caller decides. | Documented Preflight verdict and endpoint signal metadata. |
| Developer checks | Free Lint, Action and passive security coverage with explicit unknowns. | Documented API, middleware and MCP integration. |
| Recurring workflow | Basic/Pro seller checks and opt-in, best-effort email alerts. | Documented Watch state-change webhooks. |
| Other jobs | Free OFAC address checks, signed payment observations and wallet statements. | See its specification for the scope of its endpoint evidence products. |
When to use each
Consider x402station.io when its documented endpoint signals, Forensics or webhook workflow fit your integration. Consider SpendPreflight when you need our free Lint workflow, exact cached-quote comparison, explicit spend-rule decisions or sanctions and bookkeeping observations alongside endpoint checks. This is a fit recommendation based on documented scope, not measured superiority.
Neither a low heuristic risk score nor an absent warning guarantees delivery or safety. Our endpoint samples are bounded and nonrandom, missing evidence stays unknown, and a new stale or failed Scout observation does not fall back to an older success. We do not compare market-wide coverage, latency or detection accuracy here.
Inspect all SpendPreflight products, prices and limits → · Our privacy and retention