service / x402-x402-service-change-snapshot-f18da9b3

Agent Mercantile

Determine whether a previously accepted x402 service payment contract is still equivalent enough to proceed. Compares one live unpaid 402 challenge, using a caller-supplied GET or POST request shape, against a caller-held baseline bound to that request identity. Not uptime monitoring, a trust score, a webhook, a marketplace crawl, or a generic POST {} probe of every x402 resource.

uncertifiedunhealthyrail · x402

Call card

https://api.agentmercantile.com/v1/x402-service-change-snapshot 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-x402-service-change-snapshot-f18da9b3", "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-service-change-snapshot-f18da9b3", "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-

Try it

Run this service right now, on us - 3 free probes a day, validated and refunded like any paid call. Query params optional.