# Mercury Trust Quick-Check

> Mercury Trust Quick-Check is a paid API for AI agents from merc-trust.vercel.app, paid per call via x402, $0.005/call, status down (last checked 2026-09-15).

Evaluates candidate wallets for trustworthiness and readiness for agent handoffs using on-chain signals like MERC/USDC balances and transaction history

## Facts

- Endpoint: POST https://merc-trust.vercel.app/api/trust/quick-check
- Price: $0.005/call
- Payment: x402
- Status: down
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/merc-trust-vercel-app-d8e6d176
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap__X_pRkwPdVgpZ_nxJckE8

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 merc-trust-vercel-app-d8e6d176 -d '<json body>'
```

Example prompt: Before handing off this task, run a quick trust check on these two candidate wallets — 0xABC...123 (MERC balance 50, USDC balance 10, 12 recent transactions, has used paid services, 3 recent USDC transfers, active on Base) and 0xDEF...456 (MERC balance 0, USDC balance 2, 1 recent transaction, no paid service usage) — and tell me which one is safe to delegate to.

## When to prefer this

Use this endpoint when orchestrating multi-agent systems and needing a fast, low-friction signal about whether a candidate wallet/agent can be trusted for task delegation. Ideal when you have on-chain metadata already available (balances, transaction counts) and want a composite trust verdict rather than building scoring logic yourself. Prefer this over generic identity checks when the delegation context involves MERC/USDC ecosystems or Base network activity.

## Known failure modes

- Missing required 'candidates' array returns a validation error
- Empty candidates array may return an empty or error response
- Wallet addresses that are malformed or unresolvable may yield low-confidence scores
- Network issues or upstream on-chain data unavailability can cause timeouts or degraded scoring
- Payment failure (x402) if USDC payment is not properly authorized prior to call

## How this service works

Mercury Trust quick-check for agent handoffs: low-friction delegation, provenance, and memory triage with next-step routing.

## Output

Returns a trust assessment for each candidate wallet, including delegation readiness signals, provenance scores derived from on-chain activity (balances, transaction counts, Base activity), and a next-step routing recommendation indicating which wallet(s) are suitable for agent handoffs.

## 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": [
      "POST"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "candidates"
     ],
     "properties": {
      "wallet": {
       "type": "string"
      },
      "candidates": {
       "type": "array",
       "items": {
        "type": "object",
        "required": [
         "wallet"
        ],
        "properties": {
         "wallet": {
          "type": "string"
         },
         "mercBalance": {
          "type": "number"
         },
         "usdcBalance": {
          "type": "number"
         },
         "recentTransactions": {
          "type": "number"
         },
         "hasUsedPaidServices": {
          "type": "boolean"
         },
         "recentUsdcTransfers": {
          "type": "number"
         },
         "hasRecentBaseActivity": {
          "type": "boolean"
         }
        }
       }
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/merc-trust-vercel-app-d8e6d176/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from merc-trust.vercel.app](https://www.zero.xyz/host/merc-trust.vercel.app/llms.txt)