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Pagination Contract Audit
x402
Pagination Contract Audit is a paid API for AI agents from api.zfinia.com, paid per call via x402, $0.24/call, status unknown (last checked 2026-10-19).
Audits a pagination contract definition to detect data-loss and row-duplication bugs including non-unique sort fields, mutable-sort offsets, unbounded page sizes, and mixed cursor/offset usage.
Price / call$0.24
Success—
StatusUnknown
How this service works
Audit a pagination contract for the ways it loses or repeats rows. The central finding is the one almost every paginated API has at first: a sort on a non-unique field with no unique tiebreaker, so rows that compare equal have no defined order and a caller walking the pages can get one row twice and never get its neighbour, with nothing failing. Also reports offset pagination over a mutable sort, an unbounded page size, contradictory bounds, and a cursor contract that also takes an offset.
Output
A structured audit report listing all detected pagination contract problems: non-unique sort fields lacking a unique tiebreaker (the central finding), offset pagination over mutable sorts, unbounded or contradictory page size bounds, and cursor contracts that also accept an offset parameter — each finding described with enough detail for the developer to understand the data-loss or row-duplication risk.
Example use cases
Catching duplicate rows in sort design
“I have a paginated API that sorts by 'updated_at' which isn't unique, uses offset pagination, and has a default page size of 50 with a max of 1000 — can you audit the contract and tell me if callers might see duplicate or missing rows?”
Validating cursor pagination safety
“My API uses cursor-based pagination and sorts by 'id' which is unique and immutable, with a page size max of 200 — audit this contract and check if there are any ways a client walking the pages could lose or repeat records.”
Reviewing mixed offset and cursor contract
“Our pagination design uses cursor style but we also accept an offset parameter as a fallback — sort is on 'score' which is not unique. Can you audit this contract and tell me what the risks are?”
Technical details
Endpoint
POSThttps://api.zfinia.com/x402/v1/pagination-contract-audit?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to programmatically verify that a paginated API contract is free of row-loss and row-duplication bugs before shipping or reviewing it — especially when the sort fields, pagination style, or page size bounds are developer-supplied and need a deterministic structural audit rather than a general code review.
Side effects
- Missing or malformed contract object returns a validation error
- Sort array items missing required fields like 'field' or 'unique' may cause incomplete analysis
- No findings returned if the contract appears sound — not an error, just a clean audit
- Sort array exceeding 20 items is rejected by schema limit
- Invalid enum value for style field causes request rejection
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| contract | object |
Tags
x402
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