service / x402-preflight-093f6b2d
x402 Pre-Payment Safety Check
Should an agent pay this x402 endpoint? One read-only call (never pays): validates the 402 + accepts[] (will it settle), labels liveness LIVE|ZOMBIE|DEAD, flags a >=$1000 price-trap honeypot (=> AVOID), scans resource + MCP tools for LLM01/LLM08 injection, screens payTo vs OFAC/scam, checks price (live vs advertised: MATCH|OVERCHARGE|UNDERCHARGE) and Attack-III cache-leakage posture. Returns PAY|CAUTION|AVOID + fix hints. Not a settlement guarantee.
uncertifiedrail · x402
Call card
https://x402-data-api.sigrunner.workers.dev/x402/preflight
price $0.001 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-093f6b2d", "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-093f6b2d", "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 calls0
failed calls0
refund rate 7d-
uptime 30d-
buyers 30d0
last verifiednever
certified since-
Daily probe success ratio, last 30 days. Last probed 2026-11-06.
Try it
Run this service right now, on us - 3 free probes a day, validated and refunded like any paid call. Query params optional.