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Delx Set Diff
x402
Delx Set Diff 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).
Computes the set difference (a minus b), returning elements in array a that are not present in array b, along with a count.
Price / call$0.001
Success—
StatusUnknown
How this service works
Set difference a - b. Call when you remove blocked IDs from agent candidate lists. Returns difference items and count for $0.001 USDC via x402 on Base. No network, no keys, no retention; first-party local JSON only. Results are advisory; the caller owns budgets, auth, and production controls.
Output
Returns the set difference — an array of elements that appear in array a but not in array b — along with a count of those items. No data is retained server-side; results are computed locally on the fly.
Example use cases
Filter blocked users from candidates
“I have a list of candidate user IDs [10, 20, 30, 40, 50] and a blocklist of banned users [20, 40] — subtract the blocked ones and show me who remains eligible.”
Remove seen items from recommendations
“My recommendation engine returned item IDs [1001, 1002, 1003, 1004, 1005] but the user has already seen [1002, 1004] — give me only the unseen recommendations.”
Exclude processed records from queue
“I have a batch of pending job IDs [7, 14, 21, 28, 35, 42] and a set of already-processed ones [14, 28, 42] — subtract the completed ones so I know what still needs to run.”
Technical details
Endpoint
POSThttps://api.delx.ai/api/v1/x402/set-diffWhen to prefer
Choose this endpoint when you need a fast, cheap, stateless set-difference computation without standing up any infrastructure — ideal for agent workflows that need to subtract blocklists, deny lists, or already-processed IDs from candidate arrays in real time. It is purpose-built for agentic use: no API keys, no data retention, and payment via x402 on Base at $0.001 USDC per call.
Side effects
- Missing or malformed array a or b returns a validation error
- Non-array inputs cause a schema rejection
- Payment failure via x402 on Base prevents the call from executing
- Duplicate elements within a or b may affect result depending on implementation
- Empty array a always returns an empty difference with count zero
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| a | array | Input field: a. |
| b | array | Input field: b. |
Output
Schema · Response
{
"type": "json",
"example": {
"count": 2,
"items": [
1,
3
],
"schema": "delx/util-set-diff/v1"
}
}Tags
x402
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