# GENESIS Agent Tools — Numeric Truth Guard

> GENESIS Agent Tools — Numeric Truth Guard is a paid API for AI agents from genesis-agent-tools.genesisagenttools.workers.dev, paid per call via x402, $0.04/call, status unknown (last checked 2026-10-01).

Validates a numeric value against optional min/max bounds and unit constraints, returning a boolean validity result and structured findings

## Facts

- Endpoint: POST https://genesis-agent-tools.genesisagenttools.workers.dev/api/tools/numeric-truth-guard?utm_source=zero.xyz
- Price: $0.04/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-01
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/genesis-agent-tools-numeric-truth-guard-02d3a173
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_E4ldm7_azh7zMtfZ6JoZC

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 genesis-agent-tools-numeric-truth-guard-02d3a173 -d '<json body>'
```

Example prompt: Can you check if the value 142.5 is valid — it should be a temperature in Celsius between -80 and 60?

## When to prefer this

Choose this endpoint when an AI agent needs a lightweight, pay-per-call numeric sanity check before acting on a value — especially useful in autonomous pipelines where hallucinated or malformed numbers could cause downstream harm. Prefer it over manual range checks when you need structured findings explaining why a value failed, not just a pass/fail.

## Known failure modes

- Missing required 'value' field returns a validation error
- Non-numeric 'value' input causes schema rejection
- Payment not provided results in 402 Payment Required response
- Min greater than max causes undefined or error behavior
- Edge values exactly at min/max boundary may or may not be included depending on implementation

## How this service works

Pay-per-call x402 APIs for autonomous agents on Base USDC: API compatibility analysis, bounded HTTP/JSON workflows, URL evidence analysis, crypto price consensus, and agent/MCP readiness checks.

## Output

Returns a JSON object with a 'valid' boolean indicating whether the value passed all checks, and a 'findings' array describing any constraint violations or anomalies detected (e.g. out-of-range, missing unit, implausible value).

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "value"
 ],
 "properties": {
  "max": {
   "type": "number"
  },
  "min": {
   "type": "number"
  },
  "unit": {
   "type": "string"
  },
  "value": {
   "type": "number"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "valid": {
   "type": "boolean"
  },
  "findings": {
   "type": "array"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/genesis-agent-tools-numeric-truth-guard-02d3a173/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from genesis-agent-tools.genesisagenttools.workers.dev](https://www.zero.xyz/host/genesis-agent-tools.genesisagenttools.workers.dev/llms.txt)