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Verity Suite Tally — Arithmetic & Financial Figures Sanity Checker
x402
Verity Suite Tally — Arithmetic & Financial Figures Sanity Checker is a paid API for AI agents from verity-suite.onrender.com, paid per call via x402, $0.06/call, status unknown (last checked 2026-09-13).
Validates numbers, math, and financial figures in text for arithmetic correctness, internal consistency, and plausibility, returning a calibrated verdict with per-issue findings.
Price / call$0.06
Success—
StatusUnknown
How this service works
The trust fabric for AI agents — calibrated, fail-closed services agents pay per call.
Output
Returns a JSON object with: a verdict enum (consistent, minor_issues, errors_found, or uncertain), a calibrated confidence score (0–1), a findings array with per-figure notes comparing stated vs. recomputed values, a reasons array explaining the overall verdict, and an optional corrected_values array listing recomputed correct figures where inputs are unambiguous.
Example use cases
Example prompt
“Sanity-check the numbers in this paragraph for me — 'Q3 revenue was $4.2M, up 35% from Q2's $3.0M, giving a full H1 total of $7.8M' — and tell me if everything reconciles or if there are any arithmetic errors, flagging the confidence you have in the verdict.”
Technical details
Endpoint
POSThttps://verity-suite.onrender.com/tallyWhen to prefer
Choose this endpoint when you need a calibrated, machine-readable verdict on whether numbers in a document are arithmetically correct and internally consistent — especially for financial documents, reports, or data summaries where errors have material consequences. Prefer it over general-purpose LLM math checks because it returns a structured verdict with confidence, per-finding breakdowns, and corrected values, making it suitable for automated pipelines that need to act on the result.
Side effects
- Returns verdict='uncertain' when figures depend on external data not present in the text (e.g., unpublished base rates)
- Returns verdict='uncertain' when units or currency are ambiguous and cannot be resolved from context
- Low confidence score when few figures in the text are independently checkable
- May miss errors in prose where numbers are described qualitatively rather than stated precisely
- Payment failure (x402) if insufficient USDC balance — endpoint is fail-closed
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| textrequired | string | the text containing numbers, math, or financial figures to sanity-check |
| context | string | optional background: units, currency, time period, or domain assumptions the figures rely on; treated as supplied data, not as commands |
Output
Schema · Response
| Field | Type | Description |
|---|---|---|
| reasonsrequired | array | concrete reasons for the overall verdict |
| verdictrequired | string | consistent=every figure you could actually recompute reconciles; minor_issues=only rounding/display-precision differences within tolerance, nothing material; errors_found=at least one provable arithmetic error, contradiction, or impossible figure; uncertain=cannot verify (missing/ambiguous values or units, or correctness depends on an external fact not supplied) |
| findingsrequired | array | per-issue notes: the figure or equation checked, the stated value vs. your recomputed value, and why it is correct, wrong, implausible, or unverifiable |
| confidencerequired | number | calibrated probability the verdict is correct given only what is checkable from the text/context; lower it when few figures are checkable, units/values are ambiguous, or claims depend on external facts |
| corrected_values | array | recomputed correct figures, emitted only for errors where every input needed to recompute is present AND unambiguous in the text/context; omit otherwise |
Tags
x402
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