# DCL Evaluator – Fast Pre-Action Policy Audit

> DCL Evaluator – Fast Pre-Action Policy Audit is a paid API for AI agents from bazaar.fronesislabs.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-16).

Performs a fast policy audit of an agent's proposed HTTP action, returning a verdict, confidence score, and reason before the action is executed.

## Facts

- Endpoint: GET https://bazaar.fronesislabs.com/evaluate/fast
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/dcl-evaluator-fast-pre-action-policy-audit-f41da7ed
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_9qaRxbEesFDhR88IenhFz

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 dcl-evaluator-fast-pre-action-policy-audit-f41da7ed
```

Example prompt: Before my agent fires this GET request, run a fast DCL policy audit on it and tell me the verdict and confidence score — I need to know if it's safe to proceed.

## When to prefer this

Choose this endpoint when you need a low-latency (real-time) policy gate before a GET, HEAD, or DELETE action and can tolerate a slightly lower confidence bar in exchange for speed. Prefer the sibling 'Strict pre-action audit' endpoint when higher confidence is required and latency is acceptable. Use this fast variant inside tight agent loops where every millisecond counts and you want a quick pass/fail before committing to an action.

## Known failure modes

- Missing or malformed 'input' object returns a validation error
- Unsupported HTTP method (e.g. POST, PUT) rejected with enum constraint error
- Payment not provided or insufficient USDC causes 402 Payment Required response
- Policy service unavailable returns 503 or timeout
- Ambiguous or empty query params may reduce confidence score without failing the call

## How this service works

Low-latency pre-action screening for routine agent responses and tool-call decisions.

## Output

Returns a JSON object containing a verdict (pass/fail/flag), a confidence score (0–1), a human-readable reason string, a drift score and drift mode indicating how much the action deviates from baseline policy, the policy version used, an input hash for audit traceability, a chain index for sequencing in multi-step audits, and a transaction hash recording the x402 micropayment.

## 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",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {}
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "required": [
      "verdict",
      "confidence",
      "reason",
      "tx_hash",
      "chain_index"
     ],
     "properties": {
      "reason": {
       "type": "string"
      },
      "tx_hash": {
       "type": "string"
      },
      "verdict": {
       "type": "string"
      },
      "timestamp": {
       "type": "number"
      },
      "confidence": {
       "type": "number"
      },
      "drift_mode": {
       "type": "string"
      },
      "input_hash": {
       "type": "string"
      },
      "chain_index": {
       "type": "integer"
      },
      "drift_score": {
       "type": "number"
      },
      "policy_version": {
       "type": "string"
      }
     }
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/dcl-evaluator-fast-pre-action-policy-audit-f41da7ed/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from bazaar.fronesislabs.com](https://www.zero.xyz/host/bazaar.fronesislabs.com/llms.txt)