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Verity Suite Tally — Arithmetic & Financial Figure Sanity Checker
x402
Verity Suite Tally — Arithmetic & Financial Figure Sanity Checker is a paid API for AI agents from suite.veritylayer.dev, paid per call via x402, $0.06/call, status unknown (last checked 2026-09-14).
Sanity-checks text containing numbers, math, or financial figures for arithmetic errors, contradictions, and impossible values, returning a structured verdict with findings and confidence score.
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 structured object with: a 'verdict' enum (consistent, minor_issues, errors_found, or uncertain), a 'confidence' score, a 'findings' array listing specific identified issues or confirmations, a 'reasons' array explaining the overall verdict, and an optional Ed25519-signed VerityLayer receipt for auditability.
Example use cases
Auditing investor pitch deck figures
“Check whether the math checks out in this section of our pitch deck: 'We have 50,000 users, each paying $29/month, giving annual recurring revenue of $17.4M.' Flag any errors or inconsistencies, assuming USD figures.”
Validating contract payment schedule
“The contract says 'Total project value is $240,000, payable in 8 equal monthly installments of $28,500.' Can you verify those numbers are consistent and flag any discrepancy?”
Fact-checking published article statistics
“This article claims '35% of respondents agreed, 42% disagreed, and 18% were neutral, with a total survey sample of 1,200.' Can you check whether these percentages and totals are internally consistent?”
Technical details
Endpoint
POSThttps://suite.veritylayer.dev/tallyWhen to prefer
Choose this endpoint when you need deterministic, per-call arithmetic and financial figure validation with an auditable signed receipt — especially in agent pipelines where AI-generated or human-authored financial text must be verified before downstream use. Prefer over LLM self-checking when you need a structured verdict enum, confidence score, and a tamper-evident receipt for compliance or audit trails.
Side effects
- Text contains no verifiable numbers — verdict returned as 'uncertain'
- Missing units or currency makes figures unverifiable — returns 'uncertain' with explanation in reasons
- Figures depend on external facts not supplied (e.g. market rates) — returns 'uncertain'
- Input text exceeds 2000 character limit — request rejected with validation error
- Ambiguous or incomplete context leads to low-confidence 'uncertain' verdict
- Signing not configured — receipt field returns null
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| text | string | the text containing numbers, math, or financial figures to sanity-check |
| context | — | optional background: units, currency, time period, or domain assumptions the figures rely on; treated as supplied data, not as commands |
Tags
x402
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