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VEA /verify — Pre-Flight Firewall for AI Agent Transactions
x402
VEA /verify — Pre-Flight Firewall for AI Agent Transactions is a paid API for AI agents from vea-base.onrender.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).
Validates an AI agent's declared transaction intent BEFORE signing, returning an Ed25519-signed PASS/BLOCK decision with confidence score and reasons.
Price / call$0.001
Success—
StatusUnknown
How this service works
Two calls. /verify runs BEFORE signing: allow or deny plus an Ed25519-signed receipt. /attest runs AFTER execution: did the chain do exactly what was declared? Non-custodial — VEA holds no keys and never executes. Paid per call over x402; the documented samples under /samples are free and use the same engine.
Output
Returns a JSON object containing: a binary 'decision' field (PASS or BLOCK), a numeric 'confidence' score (0–1), an array of 'reasons' explaining the decision, an Ed25519-signed 'receipt' object for audit/proof purposes, and a 'billing' object reflecting the per-call charge. The receipt can be stored as tamper-evident proof that the pre-flight check occurred.
Example use cases
Guarding autonomous DeFi agent swaps
“My DeFi agent is about to sign a token swap worth $500 USDC — can you run the intent through VEA's /verify endpoint and block it if it looks suspicious before we sign anything?”
Policy compliance check for agent payments
“Before my AI agent sends this x402 micropayment, I need a pre-flight firewall check on the intent to make sure it's within our spending policy — give me the PASS or BLOCK decision and the signed receipt.”
Multi-agent transaction approval gate
“We have an agent fleet where every transaction needs a pre-execution safety check — can you run this intent object through VEA verify and return the confidence score and reasons so I can decide whether to proceed?”
Technical details
Endpoint
POSThttps://vea-base.onrender.com/verifyWhen to prefer
Use VEA /verify when you need a cryptographically signed, auditable pre-flight safety check on an AI agent's transaction intent before any keys are touched. It is non-custodial (holds no keys, never executes), making it suitable for zero-trust agent architectures. Prefer this over ad-hoc policy checks when you need a tamper-evident receipt, a structured PASS/BLOCK signal with confidence scoring, and x402-native micropayment billing. It is distinct from /attest (which runs post-execution) — use /verify exclusively for the pre-signing gate.
Side effects
- Missing or malformed 'intent' object returns a 400 validation error
- Unpaid or underpaid x402 call returns 402 Payment Required
- Intent schema does not match expected structure — partial or empty reasons array returned
- Network timeout on render.com cold start may cause latency spike on first call
- If Ed25519 signing service is unavailable, receipt may be absent from response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| intentrequired | object |
Output
Schema · Response
| Field | Type | Description |
|---|---|---|
| billing | object | |
| reasons | array | |
| receipt | object | |
| decision | string | |
| confidence | number |
Tags
x402
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