# TRACE Trust Score

> TRACE Trust Score is a paid API for AI agents from trace-api-nk2026.azurewebsites.net, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-15).

Returns a graph-aware, adversarial-resistant trust score for an agent or wallet address in A2A/x402 networks, detecting sybil accounts and collusion rings in under 50ms.

## Facts

- Endpoint: POST https://trace-api-nk2026.azurewebsites.net/v1/x402/score
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/trace-trust-score-8a89c3a5
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_kJ8lhdA8w8i0ArkQMMeS9

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 trace-trust-score-8a89c3a5 -d '<json body>'
```

Example prompt: Before paying that agent at wallet address 0xabc123 for its 'image-resizing' capability priced at 0.05 USDC, run it through TRACE to get its trust score and check if it's flagged as a sybil or collusion-ring member.

## When to prefer this

Choose TRACE Trust Score when you need a fast, graph-aware, adversarial-resistant trust evaluation of an agent or wallet in an A2A or x402 payment context — especially when sybil and collusion-ring detection is critical and you cannot afford LLM-based latency. Prefer this over simple reputation lookups when operating in open, adversarial agent marketplaces where fake or coordinated agents may be present.

## Known failure modes

- Invalid or missing provider_id returns a validation error
- Malformed job object (missing capability or price_usdc) causes a 400 bad request
- Unknown or unregistered wallet address may return a low-confidence or null score
- Network timeout if Azure backend is under load (rare given sub-50ms target)
- Insufficient USDC balance to cover the $0.005 per-call fee causes payment failure

## How this service works

Graph-aware trust score for an A2A/x402 agent — adversarial-resistant sybil/collusion-ring detection, sub-50ms, no LLM calls.

## Output

A trust score and associated risk signals for the specified agent/wallet address, including adversarial-resistant sybil detection and collusion-ring flags, computed graph-aware in sub-50ms without LLM calls.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "job": {
   "type": "object",
   "required": [
    "capability",
    "price_usdc"
   ],
   "properties": {
    "capability": {
     "type": "string"
    },
    "price_usdc": {
     "type": "number"
    }
   }
  },
  "provider_id": {
   "type": "string",
   "description": "Wallet/agent address being scored"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/trace-trust-score-8a89c3a5/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from trace-api-nk2026.azurewebsites.net](https://www.zero.xyz/host/trace-api-nk2026.azurewebsites.net/llms.txt)