# SiteCheck DeFi Stablecoins Lookup

> SiteCheck DeFi Stablecoins Lookup is a paid API for AI agents from api.sitecheck-api.workers.dev, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-15).

Returns current price, circulating supply, peg type, peg mechanism, and chain distribution for stablecoins, optionally filtered by symbol, sourced from DefiLlama.

## Facts

- Endpoint: GET https://api.sitecheck-api.workers.dev/api/defi/stablecoins?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/sitecheck-defi-stablecoins-lookup-94d6e1b2
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_n2mL2Ho-oZzYoMyn5O17X

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 sitecheck-defi-stablecoins-lookup-94d6e1b2
```

Example prompt: What's the current price and circulating supply of USDC, and which chains is it available on?

## When to prefer this

Use this endpoint when you need stablecoin-specific metadata — price, peg type, peg mechanism, chain availability, and circulating supply — especially when filtering by a specific symbol. Prefer this over generic crypto price endpoints when peg mechanism or chain distribution data is also needed. Backed by DefiLlama's stablecoin dataset with 30-minute caching for efficiency.

## Known failure modes

- Invalid or unknown symbol returns empty stablecoins array
- DefiLlama upstream API unavailability may cause stale or missing data
- Rate limiting or payment failure returns 402 Payment Required
- Cached data may be up to 30 minutes old, not reflecting real-time price changes

## How this service works

Stablecoins tracked by DefiLlama: circulating supply, peg type and mechanism, price, and the chains each one runs on. With symbol, that coin; without it the 50 largest. Attribution: Data: DefiLlama. Information only, not financial advice.

## Output

Returns a JSON object with a list of stablecoins, each including name, symbol, current price, peg type (e.g. peggedUSD), peg mechanism (e.g. fiat-backed), circulating supply in USD, and supported chains. Also includes count, data source attribution (DefiLlama), cache timestamp, and a disclaimer. Data is cached for 30 minutes.

## 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"
    },
    "queryParams": {
     "type": "object",
     "required": [],
     "properties": {
      "symbol": {
       "type": "string",
       "description": "Symbol, e.g. USDC (optional)"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "count": 1,
  "source": "DefiLlama stablecoins API (includePrices), trimmed and cached for 30 minutes",
  "checkedAt": "2026-10-14T04:49:21.903Z",
  "disclaimer": "Information only, not financial advice.",
  "attribution": "Data: DefiLlama",
  "stablecoins": [
   {
    "name": "USD Coin",
    "price": 0.999847,
    "chains": [
     "Manta",
     "RISE"
    ],
    "symbol": "USDC",
    "pegType": "peggedUSD",
    "pegMechanism": "fiat-backed",
    "circulatingUsd": 73123826903
   }
  ]
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/sitecheck-defi-stablecoins-lookup-94d6e1b2/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.sitecheck-api.workers.dev](https://www.zero.xyz/host/api.sitecheck-api.workers.dev/llms.txt)