approvedinfrastructure
x402 Endpoint Liveness Check
Sends one unpaid GET/POST/HEAD probe to any x402 resource URL and grades its 402 surface: ALIVE means a well-formed 402 with valid accepts and extracted minimum USD price; DEGRADED means reachable but not a clean x402 surface (non-402, redirect, malformed challenge, or slow); DEAD means network error, timeout, or 5xx. Private, loopback, link-local, CGNAT and metadata targets are blocked before settlement so you are never charged for an unprobeable request. Post-settle failures are auto-refunded.
Networks
Base (Coinbase L2)solana:mainnetNoble
Regions
Global (no regional restriction)
Tags
#x402#liveness#health-check#uptime#402-challenge#monitoring#verdict
How to use
Sample response
{"resource_url":"https://proxy.suverse.io/v1/data/crypto-market-pulse","verdict":{"status":"ALIVE","reason":"valid_x402_challenge","checked_at":"2026-07-02T01:00:00.000Z"},"signals":{"http_status":402,"latency_ms":220,"x402_version":1,"accepts_count":2,"accepts_valid":true,"price_usd_min":0.1,"networks":["base","solana"],"bazaar_extension_present":true,"input_schema_declared":true},"data_quality":{"probe_method":"POST","timeout_ms":8000,"redirect_policy":"manual"},"raw":{"challenge_body":"{\"x402Version\":1,...}"}}curl -X GET 'https://proxy.suverse.io/v1/data/x402-liveness-check'