# Script Master Labs — Content Trust Score API

> Script Master Labs — Content Trust Score API is a paid API for AI agents from mcp-x402.onrender.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).

Scores the trustworthiness of a given piece of content, with optional sender wallet context, using U.S. federal data sources, paid per-call in USDC via x402.

## Facts

- Endpoint: POST https://mcp-x402.onrender.com/x402/content-trust-score
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/script-master-labs-content-trust-score-api-933a9e8f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_NdNwpJuCssny8GAWZcTY0

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 script-master-labs-content-trust-score-api-933a9e8f -d '<json body>'
```

Example prompt: Can you run a content trust score on this article text: 'The FDA announced a new drug approval on Monday...' — I want to know how credible it is before I share it?

## When to prefer this

Choose this endpoint when you need a per-call, pay-as-you-go trust or credibility score for textual content anchored to U.S. federal data sources. It is especially useful for fact-checking pipelines, content moderation systems, or sender verification workflows where you want government-backed signal rather than purely model-based heuristics. At $0.01 USDC per call it suits high-volume spot checks without subscription overhead.

## Known failure modes

- Missing required 'content' field returns a 400 validation error
- Payment not settled via x402 returns a 402 Payment Required response
- Empty or extremely short content may yield low-confidence or undefined scores
- Invalid sender_wallet format may cause processing errors or be ignored
- Service downtime on Render hosting may cause 503 errors
- Content in unsupported languages may return low-quality or null scores

## How this service works

Pay-per-call crypto, RWA, federal, SEC, Section 8/HUD housing, and compliance APIs via x402. Primary: USDC on Base (eip155:8453). Also accepts Global Dollar (USDG) on Robinhood Chain (eip155:4663) via sovereign X-PAYMENT-TX. Hyphen routes only (e.g. /x402/gas-tracker, /x402/pha-lookup, /x402/sec-8k). MARKETPLACE REVIEW: use free /x402/playground/* (no key, no payment). Production /x402/* returns 402 unless paid via x402 or X-Api-Market-Key / X-API-Key from seller dashboard.

## Output

Returns a numerical or categorical trust score indicating the credibility of the submitted content, potentially cross-referenced against U.S. federal datasets. May include confidence indicators or breakdown of scoring factors.

## Request schema (JSON Schema)

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

## Response schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/script-master-labs-content-trust-score-api-933a9e8f/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from mcp-x402.onrender.com](https://www.zero.xyz/host/mcp-x402.onrender.com/llms.txt)