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Base Withdrawal Decoder & Finalizer (post-Beryl)
x402
Base Withdrawal Decoder & Finalizer (post-Beryl) is a paid API for AI agents from 402.com.tr, paid per call via x402, $0.04/call, status unknown (last checked 2026-09-14).
Decodes a Base withdrawal-initiation transaction to extract the L2ToL1MessagePasser event details and estimates finalization windows under post-Beryl (2026-06-25) rules.
Price / call$0.04
Success—
StatusUnknown
How this service works
🆕 Beryl (2026-06-25) cut the single-proof withdrawal window from 7 days to 5, with a dual-proof fast path at ~1 day. Given a Base withdrawal-initiation tx, this decodes the L2ToL1MessagePasser event (the withdrawalHash, target & value needed to prove/finalize on L1) and estimates the finalization windows under the post-Beryl rules. For agents managing cross-chain liquidity.
Output
Returns the decoded L2ToL1MessagePasser event fields (withdrawalHash, target, value) from the withdrawal-initiation transaction, plus estimated timing windows for the single-proof path (~5 days) and the dual-proof fast path (~1 day) under post-Beryl rules, helping agents know when to trigger prove/finalize calls on L1.
Example use cases
Example prompt
“I just initiated a Base withdrawal — can you decode tx 0x4a3f...c2b1 and tell me the withdrawalHash, target, value, and when I'll be able to prove and finalize it on L1 under the new Beryl rules?”
Technical details
Endpoint
GEThttps://402.com.tr/api/x402/base-withdrawalWhen to prefer
Use this endpoint when managing cross-chain liquidity on Base and you need to programmatically determine the parameters and timing required to prove and finalize a withdrawal on L1, especially after the Beryl upgrade changed the withdrawal windows. Prefer this over manual RPC calls when you need structured, decoded output with timing estimates ready for automation.
Side effects
- Invalid or non-existent transaction hash returns an error
- Transaction hash is not a withdrawal-initiation tx (wrong event type)
- Base RPC unavailable causing lookup failure
- Tx not yet indexed or too recent
- Payment not processed — 402 payment required error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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