# Crucible Stablecoin Depeg Checker

> Crucible Stablecoin Depeg Checker is a paid API for AI agents from crucible.unitynodes.com, paid per call via x402, $0.03/call, status unknown (last checked 2026-09-14).

Checks one or more stablecoin contract addresses for price deviations from their peg, returning depeg status, deviation percentage, USD price, and risk score with cited evidence.

## Facts

- Endpoint: POST https://crucible.unitynodes.com/finance/depeg
- Price: $0.03/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/crucible-stablecoin-depeg-checker-e4932578
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_yDg7IYfrZo57nBysnN4ZG

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 crucible-stablecoin-depeg-checker-e4932578 -d '<json body>'
```

Example prompt: Check whether USDC (0xa0b86991c6218b36c1d19d4a2e9eb0ce3606eb48) and DAI (0x6b175474e89094c44da98b954eedeac495271d0f) are still pegged within a 0.5% threshold and flag any that have depegged.

## When to prefer this

Use this endpoint when you specifically need to verify whether stablecoins are maintaining their USD peg, especially before DeFi operations, portfolio risk checks, or automated depeg alerts. It is distinct from general token price lookups because it provides deviation-from-peg logic, a boolean depegged flag, a risk score, and cited evidence — not just a raw price. Prefer this over raw oracle calls when you need auditable, sourced depeg determinations with confidence scoring.

## Known failure modes

- Invalid or non-stablecoin contract address returns null price and deviation
- Network or oracle outage may return low confidence score
- Unsupported chain contract addresses may yield no pricing data
- Threshold value out of expected range (e.g. negative) may cause validation error
- Rate limiting or payment failure returns 402 Payment Required

## How this service works

Pay-per-call Web3 agent services: wallet, token and agent security audits; token prices, depeg checks and portfolio valuation; cited fact-checking and source research.

## Output

Returns an array of per-token checks each containing: whether the token is depegged (boolean), its current USD price, and deviation percentage from peg. Also includes an overall risk score (0-1), a confidence score, cited evidence claims with source URLs and content hashes for auditability, and the total cost of the call.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "tokens"
 ],
 "properties": {
  "tokens": {
   "type": "array",
   "description": "Stablecoin contract addresses"
  },
  "threshold": {
   "type": "number",
   "description": "Depeg deviation threshold (e.g. 0.01 = 1%)"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "cost": {
   "type": "number"
  },
  "data": {
   "type": "object",
   "properties": {
    "checks": {
     "type": "array",
     "items": {
      "type": "object",
      "properties": {
       "usd": {
        "type": "number",
        "nullable": true
       },
       "token": {
        "type": "string"
       },
       "depegged": {
        "type": "boolean"
       },
       "deviationPct": {
        "type": "number",
        "nullable": true
       }
      }
     }
    }
   }
  },
  "sources": {
   "type": "array",
   "items": {
    "type": "object",
    "properties": {
     "url": {
      "type": "string"
     },
     "hash": {
      "type": "string"
     },
     "name": {
      "type": "string"
     }
    }
   }
  },
  "evidence": {
   "type": "array",
   "items": {
    "type": "object",
    "properties": {
     "claim": {
      "type": "string"
     },
     "support": {
      "type": "string"
     },
     "sourceIndex": {
      "type": "number"
     }
    }
   }
  },
  "riskScore": {
   "type": "number"
  },
  "confidence": {
   "type": "number"
  },
  "contentHash": {
   "type": "string"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/crucible-stablecoin-depeg-checker-e4932578/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from crucible.unitynodes.com](https://www.zero.xyz/host/crucible.unitynodes.com/llms.txt)