# ScriptMasterLabs AI Fact Check API

> ScriptMasterLabs AI Fact Check API is a paid API for AI agents from acp-x402-discovery.onrender.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-22).

Performs AI-assisted fact-checking on claims or content, paid per-call in USDC via the x402 protocol on Base

## Facts

- Endpoint: GET https://acp-x402-discovery.onrender.com/x402/ai-fact-check?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-22
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/scriptmasterlabs-ai-fact-check-api-36c87b66
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_YkQMFvJ505Hm2H8uie0CX

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 scriptmasterlabs-ai-fact-check-api-36c87b66
```

Example prompt: Can you fact-check this claim for me: 'The US Federal Reserve raised interest rates 11 times between 2022 and 2023'?

## When to prefer this

Choose this endpoint when you need lightweight, pay-per-call AI fact-checking without a subscription, especially in crypto, RWA, federal, or SEC/compliance domains. It is best for one-off claim verifications where cost predictability matters ($0.001 per call). Avoid if you need guaranteed structured output schemas, high reliability SLAs, or bulk fact-checking workflows.

## Known failure modes

- Missing or malformed 'properties' input parameter returns an empty or error response
- 402 Payment Required if USDC payment via x402 is not attached or fails
- Service unavailability due to hosting on Render free tier (cold starts, sleep cycles)
- Vague or ambiguous claims may return low-confidence or inconclusive results
- Response schema is undocumented ({}) so output structure may be inconsistent

## How this service works

Pay-per-call crypto, RWA, federal, SEC, and compliance APIs. Settled in USDC on Base via x402. Hyphen routes only (e.g. /x402/rwa-aggregates, /x402/gas-tracker).

## Output

Returns an AI-generated fact-check assessment of the provided claim, including a verification status (true/false/unverifiable), supporting evidence or reasoning, and a confidence score. The response schema is minimal and results may vary in structure.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "properties": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "example": {}
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/scriptmasterlabs-ai-fact-check-api-36c87b66/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from acp-x402-discovery.onrender.com](https://www.zero.xyz/host/acp-x402-discovery.onrender.com/llms.txt)