service / x402-grade-my-stall-bc50473a
stall-row
Grade My Stall — a seller-side report card for one x402 resource: a live unpaid probe (does it answer 402 with a parseable challenge?), the description measured against the 500-character limit, CDP listing presence in the newest catalog snapshot, Settled's record, the origin's x402scan ownership declaration, and payTo consistency across sources. Checks that cannot be performed report unverified, never a guess. Use this when you run a stall and want to know how buyers' tools see it.
uncertifiedrail · x402
Call card
https://stall-row-production.up.railway.app/v1/grade-my-stall
price $0.005 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-grade-my-stall-bc50473a", "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-grade-my-stall-bc50473a", "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 30d0.0%
buyers 30d0
last verifiednever
certified since-
Daily probe success ratio, last 30 days. Last probed 2026-11-05.
Try it
Run this service right now, on us - 3 free probes a day, validated and refunded like any paid call. Query params optional.