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Block Time ETA
x402
Block Time ETA is a paid API for AI agents from api.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).
Estimates seconds until a target block height is reached given current block height offset and average block time, returning ETA and remaining block count.
Price / call$0.001
Success—
StatusUnknown
How this service works
Estimate seconds to target block from current height and block time. Call when scheduling waits or SLA checks for confirmation targets. Returns eta_seconds and blocks remaining as deterministic JSON for $0.001 USDC via x402 on Base. First-party local math only—no RPC, live market feed, API keys, storage, or mediagen. Advisory only; the caller owns capital, risk, and production controls.
Output
Returns a deterministic JSON object containing eta_seconds (estimated seconds until target block) and blocks_remaining, computed purely from local arithmetic with no RPC or live data calls.
Example use cases
Ethereum transaction confirmation wait
“We're waiting for a transaction to reach 20 confirmations and average block time is 12 seconds — how long should my workflow sleep before checking again?”
L2 finality SLA check
“Our SLA requires finality within 300 seconds. If we have 25 blocks left and each block takes 2 seconds, will we make it?”
Scheduling a timed on-chain action
“I want to trigger a contract call after 100 more blocks on a chain with 3 seconds per block — give me the ETA in seconds so I can set a timer.”
Technical details
Endpoint
POSThttps://api.delx.ai/api/v1/x402/block-time-etaWhen to prefer
Choose this endpoint when you need a fast, cheap ($0.001 USDC), deterministic estimate of block confirmation time without setting up RPC infrastructure or live chain feeds. Ideal for scheduling agent sleeps, SLA preflight checks, and confirmation-target planning where advisory math is sufficient and no live node access is available.
Side effects
- Missing or non-integer 'blocks' field returns validation error
- Missing or non-integer 'seconds_per_block' field returns validation error
- Zero or negative seconds_per_block may produce undefined or error result
- Payment not included or insufficient USDC via x402 returns 402 Payment Required
- Result is advisory only — actual block times vary; caller assumes all timing risk
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| blocks | integer | Input field: blocks. |
| seconds_per_block | integer | Input field: seconds per block. |
Output
Schema · Response
{
"type": "json",
"example": {
"blocks": 10,
"schema": "delx/util-block-time-eta/v1",
"eta_seconds": 20,
"seconds_per_block": 2
}
}Tags
x402
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