# Crest Stablecoins Overview

> Crest Stablecoins Overview is a paid API for AI agents from data.crestsystems.ai, paid per call via x402, $0.002/call, status down (last checked 2026-09-15).

Returns the top 15 stablecoins ranked by circulating supply, including peg type and number of supported chains.

## Facts

- Endpoint: GET https://data.crestsystems.ai/data/stablecoins
- Price: $0.002/call
- Payment: x402
- Status: down
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/data-crestsystems-ai-9f0acf58
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_w_q5OQjFc8DZaYfz1-DDz

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 data-crestsystems-ai-9f0acf58
```

Example prompt: Give me a rundown of the top 15 stablecoins right now — I want to see their circulating supply, what type of peg they use (fiat, algorithmic, etc.), and how many chains each one is on.

## When to prefer this

Use this endpoint when you need a quick ranked snapshot of the top stablecoin market — especially useful for DeFi dashboards, market overviews, or when comparing peg mechanisms and multi-chain adoption across the major stablecoins. Prefer this over a general crypto prices endpoint when the focus is specifically on stablecoins and their structural attributes (peg type, chain count) rather than price volatility.

## Known failure modes

- Payment required (402) if x402 micropayment header is missing or invalid
- Upstream data provider unavailable resulting in 503 or empty response
- Stale data if the underlying data source has not refreshed recently

## How this service works

Crest · stablecoins — Fetch top 15 stablecoins ranked by circulating supply. Returns name, supply, peg type, and chain count for USDT, USDC, DAI, and more.

## Output

A list of the top 15 stablecoins by circulating supply, each entry including the coin name (e.g. USDT, USDC, DAI), its circulating supply figure, peg type (e.g. fiat-backed, crypto-collateralized, algorithmic), and the number of blockchain networks it is deployed on.

## Example request

```json
{
 "input": {
  "type": "http",
  "method": "GET",
  "queryParams": {}
 }
}
```

## 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": {}
    }
   },
   "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/data-crestsystems-ai-9f0acf58/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from data.crestsystems.ai](https://www.zero.xyz/host/data.crestsystems.ai/llms.txt)