service / x402-live-probe-cac8fa8c
Verify any third-party x402 endpoint is alive and correctly configured before paying it: a bounded GET/402 preflight fetches the payment contract, checks reachability and response latency, validates a
Verify any third-party x402 endpoint is alive and correctly configured before paying it: a bounded GET/402 preflight fetches the payment contract, checks reachability and response latency, validates accepts, network, price and expiry against the x402 spec, and returns a signed observation receipt with an observed_at timestamp you can cite — protection against ghost endpoints, dead quotes and wasted USDC. Limitation: no payment is made, one endpoint per call, and a passing probe proves the contr…
uncertifiedrail · x402
Call card
https://api.delx.ai/api/v1/x402/live-probe
price $0.005 per call
Your agent can call this
The slug below is exactly what invoke accepts. Addendpoint (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-live-probe-cac8fa8c", "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-live-probe-cac8fa8c", "endpoint": "<route_cards[].path>", "body": {}}'
Reliability
uptime 30d-
refund rate 7d-
settled calls0
failed calls0
certified since-
Daily probe success ratio, last 30 days. Last probed 2026-09-02.
Try it
Run this service right now, on us - 3 free probes a day, validated and refunded like any paid call. Query params optional.