# LimitGuard Trust Score

> LimitGuard Trust Score is a paid API for AI agents from api.limitguard.ai, paid per call via x402, $0.1/call, status unknown (last checked 2026-09-14).

Returns a numeric trust score (0-100) with cluster assignment and recommendation for a given entity identifier.

## Facts

- Endpoint: POST https://api.limitguard.ai/v1/mcp/trust-score
- Price: $0.1/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/limitguard-trust-score-eba293db
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_p8Jafl9ANWXmByMLnALot

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 limitguard-trust-score-eba293db -d '<json body>'
```

Example prompt: Can you check the LimitGuard trust score for entity 'acme-corp-nl-12345'? I need to know their score, cluster, and whether they're recommended before I proceed with a transaction.

## When to prefer this

Use this endpoint when you need a fast, lightweight trust signal for a single entity and don't require a full compliance report. It's ideal as a first-pass gate before committing to more expensive full checks, or when you need a real-time trust score during inter-agent transactions in the agent economy.

## Known failure modes

- Missing entity_id returns a 400 validation error
- Unknown or unresolvable entity_id may return a low-confidence score or 404
- Payment failure (x402) if USDC balance is insufficient
- Rate limiting or quota exceeded returns a 429 error
- Malformed input schema returns a 422 unprocessable entity

## How this service works

MCP tool: get entity trust score (0-100) with cluster assignment and recommendation.

## Output

Returns a JSON object containing a numeric trust score between 0 and 100, a cluster label (e.g. 'verified'), and a recommendation indicating whether to proceed with or avoid the entity.

## Response schema (JSON Schema)

```json
{
 "example": {
  "cluster": "verified",
  "trust_score": 87
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/limitguard-trust-score-eba293db/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.limitguard.ai](https://www.zero.xyz/host/api.limitguard.ai/llms.txt)