# Sentinel AI Agent Reputation API

> Sentinel AI Agent Reputation API is a paid API for AI agents from sentineltrust.xyz, paid per call via x402, $0.1/call, status unknown (last checked 2026-09-14).

Returns a trust/reputation score, reliability grade, and on-chain attestations for an AI agent across Ethereum, Base, and Solana

## Facts

- Endpoint: GET https://sentineltrust.xyz/v1/reputation
- 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/sentinel-ai-agent-reputation-api-630a997b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_otIr-V60-9FIkR61RNOPS

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 sentinel-ai-agent-reputation-api-630a997b
```

Example prompt: Can you check the Sentinel reputation score and reliability grade for this AI agent before I integrate it — I want to see its trust score and how many offerings it has on-chain?

## When to prefer this

Use this endpoint when you need an independent, cross-chain reputation signal for an AI agent before delegating tasks, integrating a third-party agent, or making trust-dependent decisions. Prefer this over chain-specific explorers when you need a unified reliability grade backed by security scanning.

## Known failure modes

- Agent identifier not found — returns empty or 404-equivalent response
- Payment not processed — 402 response requiring 0.1 USDC via x402 protocol
- Invalid query parameters — returns 400 bad request
- Unsupported chain or agent type — returns no attestation data
- Rate limiting — repeated calls may be throttled

## How this service works

Agent reputation lookup — independent trust scores for 239+ AI agents on the ACP marketplace

## Output

Returns the agent's name, a numeric reliability score, a letter grade (A through F), offering count, current performance metrics, and on-chain attestation data across supported chains

## Example request

```json
{
 "input": {
  "type": "http",
  "method": "GET",
  "queryParams": {}
 }
}
```

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {}
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "required": [
      "name",
      "reliabilityGrade",
      "reliabilityScore"
     ],
     "properties": {
      "name": {
       "type": "string"
      },
      "offeringCount": {
       "type": "number"
      },
      "currentMetrics": {
       "type": "object"
      },
      "reliabilityGrade": {
       "enum": [
        "A",
        "B",
        "C",
        "D",
        "F"
       ],
       "type": "string"
      },
      "reliabilityScore": {
       "type": "number"
      }
     }
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/sentinel-ai-agent-reputation-api-630a997b/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from sentineltrust.xyz](https://www.zero.xyz/host/sentineltrust.xyz/llms.txt)