# klymax402 Event Resolver — Factual Claim Verifier

> klymax402 Event Resolver — Factual Claim Verifier is a paid API for AI agents from klymax402.com, paid per call via x402, $0.008/call, status unknown (last checked 2026-09-14).

Verifies a factual claim (e.g. about crypto prices or economic data) and returns a verdict, supporting evidence, and confidence score

## Facts

- Endpoint: GET https://klymax402.com/api/event-resolver/api/verify
- Price: $0.008/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/klymax402-event-resolver-factual-claim-verifier-40f0f479
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_D-UcnqPTBnig5qVUTf2m7

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 klymax402-event-resolver-factual-claim-verifier-40f0f479
```

Example prompt: Can you verify whether this claim is true: 'Bitcoin is above $90,000' — and tell me how confident you are along with the evidence?

## When to prefer this

Choose this endpoint when you need a structured, evidence-backed verdict on a specific factual claim — especially claims about crypto prices, DeFi metrics, or macroeconomic indicators. It is ideal for automated pipelines that need a machine-readable confidence score and evidence trail rather than a free-text answer. Prefer this over a general web search when you need a normalized, JSON-structured fact-check with a clear true/false verdict.

## Known failure modes

- Ambiguous or unverifiable claim returns low confidence or null verdict
- Claim about a very niche or unsupported data source may return empty evidence array
- Malformed or missing 'claim' parameter results in an error response
- Stale data may cause incorrect verdicts for rapidly changing metrics like live crypto prices
- Rate limiting or payment failure with x402 protocol results in 402 payment required response

## How this service works

One MCP endpoint gives your AI agent access to 100 APIs -- crypto, DeFi, web, AI, finance and utilities. No API keys, USDC on Base from $0.003/call.

## Output

A JSON object containing the original claim, a verdict (true/false or similar), an array of supporting evidence items, and a numeric confidence score between 0 and 1 indicating how certain the system is about the verdict.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "claim": {
   "type": "string",
   "description": "The factual claim to verify, e.g. 'Bitcoin is above $90,000' or 'The US unemployment rate is below 4%'"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "claim": "example",
  "verdict": "example",
  "evidence": [],
  "confidence": 1
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/klymax402-event-resolver-factual-claim-verifier-40f0f479/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from klymax402.com](https://www.zero.xyz/host/klymax402.com/llms.txt)