# Stablecoin Supply & Chain Breakdown API

> Stablecoin Supply & Chain Breakdown API is a paid API for AI agents from api.kadec0.xyz, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-13).

Returns circulating supply, peg mechanism, peg currency, and per-chain breakdown for stablecoins via DefiLlama

## Facts

- Endpoint: GET https://api.kadec0.xyz/v1/stablecoins
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/stablecoin-supply-chain-breakdown-api-cd6ae54d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_f1nSiBm83q25ACvR_nmF2

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-supply-chain-breakdown-api-cd6ae54d
```

Example prompt: Can you pull the circulating supply of all fiat-backed USD stablecoins — like USDC and USDT — and show me how their supply is broken down across different chains? Filter for peggedUSD mechanism and show me the top 25.

## When to prefer this

Use this endpoint when you need stablecoin-specific supply data with peg mechanism and per-chain breakdowns, especially when filtering by peg type (USD, EUR) or mechanism (fiat-backed, algorithmic, crypto-backed). Prefer this over generic DeFi TVL endpoints when the question is specifically about stablecoin circulating supply rather than protocol TVL.

## Known failure modes

- No stablecoins match the provided name/symbol filter — empty result set returned
- Invalid pegType or mechanism enum value results in a 400 bad request
- DefiLlama upstream data unavailable causes a 502 or 503 error
- maxItems set to 0 or negative integer causes a 400 validation error
- Payment not processed correctly results in a 402 payment required response

## How this service works

Stablecoin supply data. Returns circulating supply for stablecoins broken down across chains via DefiLlama, filterable by peg type and by collateral mechanism, so you can compare fiat-backed against crypto-backed and algorithmic stablecoins. For stablecoin market share, depeg watch, and chain-level supply tracking. Keyless.

## Output

Returns a list of stablecoins with their circulating supply totals, peg currency, peg mechanism (fiat-backed, crypto-backed, or algorithmic), and a per-chain supply breakdown sourced from DefiLlama.

## 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",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [],
     "properties": {
      "q": {
       "type": "string",
       "description": "name/symbol substring filter"
      },
      "pegType": {
       "type": "string",
       "description": "e.g. peggedUSD|peggedEUR"
      },
      "maxItems": {
       "type": "string",
       "default": "25"
      },
      "mechanism": {
       "type": "string",
       "description": "fiat-backed|crypto-backed|algorithmic"
      }
     }
    }
   },
   "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/stablecoin-supply-chain-breakdown-api-cd6ae54d/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.kadec0.xyz](https://www.zero.xyz/host/api.kadec0.xyz/llms.txt)