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ZayGuard Transaction Assessment
x402
ZayGuard Transaction Assessment is a paid API for AI agents from zayguard.onrender.com, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-14).
Simulates and assesses a proposed Base blockchain transaction read-only, returning a risk/safety evaluation before execution.
Price / call$0.05
Success—
StatusUnknown
How this service works
Agent-facing assessment intelligence: pay $0.05 USDC through x402 for a read-only Base transaction result.
Output
Returns a read-only assessment of the proposed Base transaction, including risk signals, simulation outcome, and safety verdict — without executing or modifying any on-chain state.
Example use cases
Pre-sign DeFi contract safety check
“I'm about to call a DeFi contract on Base — can you assess this transaction for me before I sign? From 0xAaBb112233445566778899aAbBcCdDeEfF001122, to 0x1111111254EEB25477B68fb85Ed929f73A960582, with calldata 0x12aa3caf and zero ETH value.”
Suspicious airdrop contract screening
“Someone sent me an airdrop link and I want to make sure the contract isn't a drain. Can you assess the transaction with ZayGuard — sender 0xUserWallet000000000000000000000000000001, contract 0xSuspect00000000000000000000000000000099, calldata 0x23b872dd, 0 wei on Base?”
Agent wallet transaction pre-clearance
“My agent is about to execute a token approval on Base — run a ZayGuard assessment first. From address 0xAgentWallet00000000000000000000000000AA, to 0xTokenContract000000000000000000000000BB, calldata 0x095ea7b3, no ETH value attached.”
Technical details
Endpoint
POSThttps://zayguard.onrender.com/v1/assessmentsWhen to prefer
Choose ZayGuard when you need a lightweight, pay-per-call transaction pre-flight check on Base before committing a signature. It is ideal for AI agents that autonomously execute on-chain actions and need a safety gate, or for wallets wanting a second opinion on suspicious contract calls. Prefer it over general blockchain explorers when you need a structured machine-readable risk assessment rather than raw transaction data.
Side effects
- Invalid Ethereum address format for from_address or to_address returns a 400 validation error
- Malformed calldata not matching hex pattern returns a 400 schema error
- Non-Base chain specified returns a 400 error since only 'base' is supported
- Unpayable or missing x402 payment header results in a 402 Payment Required response
- Service unavailability on Render hosting may return 503 errors
- Calldata referencing contracts not deployed on Base may return inconclusive or error results
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| data | string | Optional calldata. |
| chain | string | Network being assessed. Base or Arbitrum One. |
| value_wei | integer | Optional proposed native-value amount in wei. |
| to_address | string | Proposed recipient or contract: canonical lowercase or valid EIP-55 checksummed EVM address. |
| from_address | string | Proposed transaction sender: canonical lowercase or valid EIP-55 checksummed EVM address. |
Tags
x402
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