service / x402-sign-read-e2f71d23
stall-row
Sign Reader — read one x402 endpoint's 402 challenge: both wire formats (v2 PAYMENT-REQUIRED header, v1 JSON body) parsed and normalized (network, asset, amount atomic and exact decimal, payTo, scheme), malformed fields named, declared-vs-live mismatches (method included) when you pass your catalogue entry, and a compatibility verdict for the official Python and TypeScript x402 SDKs. Probe is unpaid. Use this when a checker's parser keeps choking on sellers' signs.
uncertifiedunhealthyrail · x402
Call card
https://stall-row-production.up.railway.app/v1/sign-read
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-sign-read-e2f71d23", "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-sign-read-e2f71d23", "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 2026-11-03 (last probe failed).
Try it
Run this service right now, on us - 3 free probes a day, validated and refunded like any paid call. Query params optional.