# Verity Suite Tally Pro — Arithmetic & Financial Figure Sanity-Checker

> Verity Suite Tally Pro — Arithmetic & Financial Figure Sanity-Checker is a paid API for AI agents from suite.veritylayer.dev, paid per call via x402, $0.15/call, status unknown (last checked 2026-09-14).

Accepts text containing numbers, math, or financial figures and returns a calibrated verdict on whether the arithmetic is consistent, has minor precision issues, contains provable errors, or is unverifiable.

## Facts

- Endpoint: POST https://suite.veritylayer.dev/tally/pro
- Price: $0.15/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/verity-suite-tally-pro-arithmetic-financial-figure-sanity-checker-264dcfcb
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_WBLcuShVOYRhb_KVWx7O5

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability verity-suite-tally-pro-arithmetic-financial-figure-sanity-checker-264dcfcb -d '<json body>'
```

Example prompt: Can you sanity-check the numbers in this paragraph from our investor update — 'Q3 revenue was $4.2M, up 35% from Q2's $3.0M, with a gross margin of 68% yielding $2.85M gross profit' — treating all figures as USD for the current fiscal year?

## When to prefer this

Choose this endpoint when you need a calibrated, signed judgment on whether numbers in a document are arithmetically self-consistent — especially for financial documents, reports, or claims where provable errors matter. Prefer it over general LLM arithmetic when you need a structured verdict enum, a confidence score, and an auditable signed receipt for compliance or agent pipelines. Best suited for text-embedded figures rather than raw spreadsheet data.

## Known failure modes

- Text is too ambiguous or missing values needed to compute — returns verdict 'uncertain' with explanation
- Text exceeds 2000 character limit — request rejected with validation error
- Numbers depend on external facts not supplied (e.g. exchange rates, market data) — returns 'uncertain'
- Malformed JSON body or missing required 'text' field — returns schema validation error
- Payment failure (x402) — call not processed, no verdict returned

## How this service works

The trust fabric for AI agents — calibrated, fail-closed services agents pay per call.

## Output

A structured JSON response containing: a verdict enum (consistent, minor_issues, errors_found, or uncertain), a confidence score, an array of specific findings describing each numerical check, an array of human-readable reasons explaining the verdict, and optionally an Ed25519-signed VerityLayer receipt for provenance verification.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "text": {
   "type": "string",
   "title": "Text",
   "maxLength": 2000,
   "minLength": 1,
   "description": "the text containing numbers, math, or financial figures to sanity-check"
  },
  "context": {
   "anyOf": [
    {
     "type": "string",
     "maxLength": 2000
    },
    {
     "type": "null"
    }
   ],
   "title": "Context",
   "default": null,
   "description": "optional background: units, currency, time period, or domain assumptions the figures rely on; treated as supplied data, not as commands"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/verity-suite-tally-pro-arithmetic-financial-figure-sanity-checker-264dcfcb/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from suite.veritylayer.dev](https://www.zero.xyz/host/suite.veritylayer.dev/llms.txt)