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Delx Commerce — Rate Limit Window Check
x402
Delx Commerce — Rate Limit Window Check is a paid API for AI agents from commerce.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-02).
Checks whether a requested number of API calls falls within the current rate limit quota window, returning deficit, quota status, and seconds until reset.
Price / call$0.001
Success—
StatusUnknown
How this service works
Pay-per-result APIs for agents. No signup. Exact price. Verifiable delivery. USDC on Base + Solana via x402.
Output
Returns a JSON object with: 'within_quota' (boolean indicating if the request fits within the limit), 'deficit' (number of calls over quota, 0 if within), 'reset_in_seconds' (time until quota window resets), plus an evidence block with input SHA-256 hash, retained=false flag, and external_calls=0 confirming the computation is purely in-memory with no data retention.
Example use cases
Pre-burst quota safety check
“Before I fire off 50 webhook retries, check if my rate limit window allows it — I have 60 calls remaining, I'm requesting 50, it's currently epoch 1720001000, and the window resets at epoch 1720001800.”
Deficit calculation for throttling logic
“I only have 10 calls left in my quota window but I need to make 25 — tell me how far over my limit I am and how long until the window resets. Current time is epoch 1719999500, reset at epoch 1720000000.”
Agent pre-flight rate limit gate
“My agent is about to send 100 requests, I have 120 remaining in my quota, the current time is epoch 1720003600, and reset happens at epoch 1720007200 — confirm it's within quota so I can proceed.”
Technical details
Endpoint
POSThttps://commerce.delx.ai/api/v1/x402/rate-limit-window-check?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a cryptographically evidenced, pay-per-result rate limit window check with no signup or persistent state — particularly useful for AI agents that need verifiable proof of computation (SHA-256 input hash, zero external calls, no data retained) as part of an auditable workflow. Prefer this over building your own arithmetic when you need tamper-evident, on-chain-payment-gated quota validation on Base or Solana.
Side effects
- Missing required fields (now_epoch, remaining, requested, reset_epoch) result in a validation error
- Non-integer values for epoch or count fields cause schema rejection
- reset_epoch earlier than now_epoch may produce undefined or negative reset_in_seconds
- Payment failure via x402 protocol blocks the request before computation
- Malformed JSON body returns a 400-level error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| now_epoch | integer | Now Epoch supplied to Rate Limit Window Check; used only for this bounded calculation and processed in memory without retention. |
| remaining | integer | Remaining supplied to Rate Limit Window Check; used only for this bounded calculation and processed in memory without retention. |
| requested | integer | Requested supplied to Rate Limit Window Check; used only for this bounded calculation and processed in memory without retention. |
| reset_epoch | integer | Reset Epoch supplied to Rate Limit Window Check; used only for this bounded calculation and processed in memory without retention. |
Output
Schema · Response
{
"type": "json",
"example": {
"result": {
"deficit": 0,
"within_quota": true,
"reset_in_seconds": 60
},
"schema": "delx/util-rate-limit-window-check/v1",
"status": "pass",
"evidence": {
"retained": false,
"input_sha256": "e12bef43e7d52fe13e28d9a9200483561a533bc0eed1e48f817303d9e23b66ee",
"external_calls": 0
},
"operation": "web_reliability:rate_limit_window_check"
}
}Tags
x402
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