# Stablecoin Market Data API

> Stablecoin Market Data API is a paid API for AI agents from crypto.apitoll.cloud, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-15).

Returns stablecoin market data ranked by USD-equivalent circulating supply, including peg type, mechanism, currency, price, and chain distribution, sourced from DefiLlama

## Facts

- Endpoint: GET https://crypto.apitoll.cloud/v1/crypto/stablecoins
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/stablecoin-market-data-api-e58d2276
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_92F3--6RaHVwbF9Ig_XIg

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 stablecoin-market-data-api-e58d2276
```

Example prompt: Show me the top 10 stablecoins ranked by circulating supply, and filter it to only ones available on Ethereum — I want to see their peg type, mechanism, and current price.

## When to prefer this

Use this endpoint when you need structured stablecoin market data including peg type, mechanism, currency, supply, and chain distribution. Prefer it over generic crypto price APIs when the user specifically cares about stablecoin segmentation (fiat-backed vs algorithmic), multi-chain presence, or EUR/JPY-pegged assets. Ideal for DeFi dashboards, risk analysis, or stablecoin market monitoring.

## Known failure modes

- Invalid or unrecognized chain name returns empty stablecoin list
- Symbol substring that matches nothing returns zero results
- Limit parameter outside 1–100 range results in validation error
- Payment failure or missing x402 USDC payment returns 402 error
- DefiLlama upstream unavailability may cause stale or failed response

## How this service works

Stablecoin market data ranked by USD-equivalent circulating supply: each coin returns its symbol, peg type and mechanism (fiat-backed, crypto-backed, algorithmic), peg currency (USD, EUR, JPY…), current peg price, native circulating supply, USD-converted supply, and the chains it lives on. Filter by symbol or chain. Track USDT, USDC, DAI, USDe, EURC and the rest of the stablecoin market. Sourced from DefiLlama.

## Output

A JSON object containing a list of stablecoins each with: symbol, name, peg type (fiat-backed, crypto-backed, algorithmic), peg mechanism, peg currency (USD, EUR, etc.), current peg price, native circulating supply, USD-equivalent circulating supply, and an array of chains they are deployed on. Also includes total count, total matching count, applied filters, and total circulating USD across all returned stablecoins. Sourced from DefiLlama.

## Example request

```json
{
 "input": {
  "type": "http",
  "method": "GET",
  "queryParams": {
   "chain": "Ethereum",
   "limit": 10,
   "symbol": "USDC"
  }
 }
}
```

## 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",
     "properties": {
      "chain": {
       "type": "string",
       "description": "Filter to stablecoins present on a chain (exact, case-insensitive): Ethereum, Solana, Base…"
      },
      "limit": {
       "type": "integer",
       "maximum": 100,
       "minimum": 1,
       "description": "Max stablecoins returned (1–100, default 20)."
      },
      "symbol": {
       "type": "string",
       "description": "Filter by symbol/name substring: USDC, USDT, DAI…"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "count": {
       "type": "number"
      },
      "source": {
       "type": "object",
       "properties": {
        "name": {
         "type": "string"
        }
       }
      },
      "filters": {
       "type": "object",
       "properties": {
        "chain": {},
        "symbol": {
         "type": "string"
        }
       }
      },
      "stablecoins": {
       "type": "array",
       "items": {
        "type": "object",
        "properties": {
         "name": {
          "type": "string"
         },
         "price": {
          "type": "number"
         },
         "chains": {
          "type": "array",
          "items": {
           "type": "string"
          }
         },
         "symbol": {
          "type": "string"
         },
         "pegType": {
          "type": "string"
         },
         "circulating": {
          "type": "number"
         },
         "pegCurrency": {
          "type": "string"
         },
         "pegMechanism": {
          "type": "string"
         },
         "circulatingUsd": {
          "type": "number"
         }
        }
       }
      },
      "totalMatching": {
       "type": "number"
      },
      "totalCirculatingUsd": {
       "type": "number"
      }
     }
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "count": 1,
  "source": {
   "name": "DefiLlama"
  },
  "filters": {
   "chain": null,
   "symbol": "usdc"
  },
  "stablecoins": [
   {
    "name": "USD Coin",
    "price": 0.9997,
    "chains": [
     "Ethereum",
     "Solana",
     "Base"
    ],
    "symbol": "USDC",
    "pegType": "peggedUSD",
    "circulating": 35000000000,
    "pegCurrency": "USD",
    "pegMechanism": "fiat-backed",
    "circulatingUsd": 34989500000
   }
  ],
  "totalMatching": 1,
  "totalCirculatingUsd": 60000000000
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/stablecoin-market-data-api-e58d2276/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from crypto.apitoll.cloud](https://www.zero.xyz/host/crypto.apitoll.cloud/llms.txt)