service / x402-x402-paid-endpoint-ae95152a
Saylor Innovations Guide Library
x402 Paid Endpoint Builder. A build method for x402-payable endpoints: defining the paid unit and free preview, choosing scheme/network/asset/price, implementing the unpaid 402 challenge, verifying and settling before irreversible fulfillment, making retries idempotency-safe, publishing discovery metadata, and passing a full negative-test gate before mainnet. Includes a worked margin-negative pricing example.
uncertifiedrail · x402
Call card
https://saylorinnovations.com/api/kb/x402-paid-endpoint
price $10000.00 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-x402-paid-endpoint-ae95152a", "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-x402-paid-endpoint-ae95152a", "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 30d98.0%
buyers 30d0
last verifiednever
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.