Nishvault x402 Pre-Send Guard
Verification0.01 USDC on Base for pre-send EVM transaction simulation for AI agents. Returns an x402 v2 challenge and, after payment, a preflight result and proof receipt; never broadcasts the transaction.
ASSESSMENT
updated 3h agoEvidence-backed signals, not a single score. Click any chip for the proof. Measured values stay read-only; unknown is honest.
reliability 0%
- uptime 24h
- -
- uptime 7d
- -
- uptime 30d
- -
- uptime 90d
- -
- response p95
- -
- avg response
- -
- total checks
- 1
compliance unknown, stale (probe failing)
x402 compliance not evaluated yet.
price -
- price (min)
- -
- category percentile (min)
- -
- endpoints / prices
- 0 / 0
- model
- unknown
- stability
- -
risk clean
No deterministic risk flag. Risk fires only on an exact blocklist match, or a reserved-brand name with a mismatched verified payTo. Never from low uptime, a high price, or a model guess.
traction ---
No settlement address is mapped for this service yet, so on-chain volume cannot be measured. Shown as unmeasured, not zero.
WHAT IT DOES
ai-derivedProvides transaction preflight simulation to verify transactions before sending
- category
- transaction-verification
AI-generated summary. The measured data is never altered by it.
ENDPOINTS
| METHOD | PATH | DESCRIPTION | PRICE | NETWORK | ASSET |
|---|---|---|---|---|---|
| GET | /simulate/transaction-preflight | --- | USDC |
REQUEST / RESPONSE EXAMPLE
An unpaid request to GET /simulate/transaction-preflight returns HTTP 402 with the payment terms. Settle onchain via your facilitator, then retry with the X-Payment header.
curl -i 'https://x402-discovery.nishvault.com/simulate/transaction-preflight'
No 402 response body has been captured for this service yet.
UPTIME
RECENT CHECKS
OVER TIME
All charts share the 7d window selected here. Every series is also served as JSON at /api/v1/services/nishvault-x402-pre-send-guard/price, /scores, /volume and /buyers. On-chain volume and distinct buyers are measured over the service's settlement address and are a conservative undercount (only settlements that reach a measured facilitator are counted). The on-chain series roll up hourly, so the latest day can be up to about an hour behind; distinct buyers are counted per payout address, so a service that settles to more than one address is an upper bound.
COMPLIANCE
not evaluated · stale (probe failing)- 402 payload captured
- accepts[] array present
- payTo address recoverable
- payTo at accepts[0].payTo (conformant shape)
- payTo is a valid on-chain address
- atomic price declared
- atomic price in a sane range
- asset (token) address declared
- network resolves to CAIP-2
- payment scheme declared
- served over HTTPS
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