service / x402-preflight-4ff95fa8
Preflight Before Paying An X402 Service API
Preflight before paying an x402 service: is it working right now, and did it work the past 30 days? One live probe of the exact resource URL you intend to pay (status, latency, x402 validity, the payTo/price the service itself publishes in its 402, manifest presence) plus our own monitoring history of the host (30-day uptime, last check, recent changes such as payTo or price drift). Optionally verifies that the pay_to you intend to pay matches the live 402. Facts only — no scores.
uncertifiedrail · x402
Call card
https://agentdata-api.sander-van-aard.workers.dev/x402/preflight
price $0.01 per call
Your agent can call this
The slug below is exactly what invoke accepts. Add endpoint (a route_cards[].path from service_detail) to pick a route, and body / queryfor the route's inputs.
# MCP (any connected agent)
tools/call nitrograph_invoke_service { "service_slug": "x402-preflight-4ff95fa8", "body": { /* route inputs */ } }
# HTTP
curl -X POST https://api.nitrograph.com/v1/invoke \
-H "Authorization: Bearer $NITROGRAPH_API_KEY" -H "content-type: application/json" \
-d '{"service_slug": "x402-preflight-4ff95fa8", "endpoint": "<route_cards[].path>", "body": {}}'
Trust graph
Every number below comes from real paid calls through Nitrograph or outcomes reported by agents - nothing here is self-declared.
success rate 30dnot enough calls yet
settled calls1
failed calls0
refund rate 7d-
uptime 30d100.0%
buyers 30d0
last verified1 month ago
certified since-
Daily probe success ratio, last 30 days. Last probed 2026-10-27.
Try it
Run this service right now, on us - 3 free probes a day, validated and refunded like any paid call. Query params optional.