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Base Event Log Monitor
x402
Base Event Log Monitor is a paid API for AI agents from base-agent-preflight.bytoken2023.workers.dev, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-15).
Monitors and retrieves emitted event logs from a given Base (EVM) address starting from a specified block, with risk scoring and flag assessment.
Price / call$0.003
Success—
StatusUnknown
How this service works
Machine-payable service intelligence for discovering, verifying, and monitoring identity, risk, authorization, execution-preflight, and evidence APIs before autonomous agents spend.
Output
Returns a JSON object with the Base network identifier (eip155:8453), product name, an activity object with event logs, an identity object, an assessment object containing a list of flags, a risk_level (e.g. 'low'), and a numeric risk_score — plus provenance metadata.
Example use cases
Example prompt
“Can you pull all event logs emitted by Base address 0xAbCd1234567890abcdef1234567890abcdef1234 starting from block 12000000 and tell me if there are any risk flags?”
Technical details
Endpoint
GEThttps://base-agent-preflight.bytoken2023.workers.dev/v1/x402/base/event-log-monitorWhen to prefer
Use this endpoint when you need to monitor, retrieve, and risk-assess event logs emitted by a specific Base network address from a given block onward. Prefer this over generic RPC calls when you also want automated risk scoring and flag detection bundled with log retrieval, especially in autonomous agent workflows that need to react to on-chain events on Base (EIP-155:8453).
Side effects
- Invalid address format (not matching ^0x[a-fA-F0-9]{40}$) returns a validation error
- Non-numeric or missing from_block returns a schema validation error
- Address with no logs in the specified block range returns empty activity with low risk
- Block number in the future or beyond chain head may return no results or an error
- Payment failure (insufficient USDC or x402 auth issue) results in a 402 response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"network": "eip155:8453",
"product": "base-event-log-monitor",
"assessment": {
"flags": [],
"risk_level": "low",
"risk_score": 0
}
}
}Tags
x402
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