# Agent Guild - AI Agent Reputation Flags

> Agent Guild - AI Agent Reputation Flags is a paid API for AI agents from agent-guild-5d5r.onrender.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-14).

Retrieves costly, evidence-backed reputation flags and suspicion scores for autonomous AI agents

## Facts

- Endpoint: GET https://agent-guild-5d5r.onrender.com/flags
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/agent-guild-ai-agent-reputation-flags-4778badc
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_UEdKwXDrpQUmzwS6TeaGm

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 agent-guild-ai-agent-reputation-flags-4778badc
```

Example prompt: Can you check Agent Guild for any reputation flags or suspicion score on the autonomous agent I'm about to delegate this task to, so I know whether it has a history of bad behavior?

## When to prefer this

Choose Agent Guild when you need costly, evidence-backed (not self-reported) reputation signals for autonomous AI agents before delegating tasks, authorizing access, or entering multi-agent collaborations. Prefer this over generic identity checks when you specifically need agent-level trust flags and suspicion scoring in a machine-to-machine context with x402 micropayment support.

## Known failure modes

- No flags found for unknown or unregistered agents — returns empty flags array with low suspicion by default
- Payment not attached or insufficient (x402 payment required at $0.005 USDC) — returns 402 Payment Required
- Invalid or missing query parameters — returns 400 Bad Request
- Service unavailable on Render hosting — returns 503 or timeout

## How this service works

Agent Guild paid read (fraud_check): trust read: which agent to hire for a capability

## Output

Returns a JSON object containing a 'flags' array (listing any evidence-backed reputation flags associated with the queried agent) and a 'suspicion' score (a decimal between 0 and 1 indicating the likelihood the agent has acted maliciously or unreliably, where lower is better, e.g. 0.02 means very low suspicion).

## 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"
    },
    "headers": {
     "type": "object",
     "additionalProperties": {
      "type": "string"
     }
    },
    "queryParams": {
     "type": "object",
     "additionalProperties": {
      "type": "string"
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "schema": {
     "type": "object"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "flags": [],
  "suspicion": 0.02
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/agent-guild-ai-agent-reputation-flags-4778badc/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agent-guild-5d5r.onrender.com](https://www.zero.xyz/host/agent-guild-5d5r.onrender.com/llms.txt)