# Financial Data x402 – Stablecoins Endpoint

> Financial Data x402 – Stablecoins Endpoint is a paid API for AI agents from x402financialdata.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-15).

Returns current prices, peg deviations, market caps, and peg mechanisms for major stablecoins, paid per-call via x402 protocol with USDC.

## Facts

- Endpoint: GET https://x402financialdata.com/stablecoins
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/financial-data-x402-stablecoins-endpoint-2e21934d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_jPQRdHOi4GZ8rf9KiULmy

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 financial-data-x402-stablecoins-endpoint-2e21934d
```

Example prompt: Pull the latest stablecoin data — I want to see current prices, peg deviations, and market caps for USDT, USDC, and any others tracked, so I can check if anything is depegging right now.

## When to prefer this

Choose this endpoint when you need current stablecoin price, peg health, and market cap data with no API key or subscription setup — ideal for pay-per-call agents that want frictionless access via x402/USDC micropayments. Prefer this over subscription-based stablecoin data providers when usage is sporadic or cost-sensitive, and when operating in a crypto-native agentic context already using the x402 payment rail.

## Known failure modes

- Payment not received or USDC transaction rejected — endpoint returns HTTP 402 requiring payment
- Insufficient USDC balance on Base or Solana — payment fails and data is not returned
- Network issues with x402 payment protocol — call may time out before data is returned
- Data provider downtime — stale or unavailable stablecoin data may result in error or empty response

## How this service works

Pay-per-call stock, macro, on-chain, and crypto data over the x402 protocol. USDC on Base or Solana, no API keys, no subscriptions.

## Output

A JSON object containing a list of stablecoins, each with name, symbol, current price, peg mechanism (e.g. fiat-backed, crypto-backed), market cap in USD, peg deviation percentage, and 1-day and 7-day market cap change percentages. Also includes an as_of timestamp and a count of returned stablecoins. Includes a note clarifying that yield-bearing tokenized treasury instruments may show large positive peg deviations that reflect NAV growth rather than a true depeg.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "required": {
   "type": "string"
  },
  "properties": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "note": "peg_deviation_pct is a large positive number for a few yield-bearing tokenized-treasury instruments classified here as USD-pegged (e.g. USYC, BUIDL) -- that's legitimate NAV growth above $1 from accruing yield, not a depeg. It's a real signal only for pure fiat/crypto-backed stablecoins meant to hold exactly $1 (USDT, USDC, DAI, etc.).",
  "as_of": "2026-08-01",
  "count": 2,
  "stablecoins": [
   {
    "name": "Tether",
    "price": 0.9990962828003668,
    "symbol": "USDT",
    "peg_mechanism": "fiat-backed",
    "market_cap_usd": 183237992492.2222,
    "peg_deviation_pct": -0.0904,
    "market_cap_change_1d_pct": -0.0235,
    "market_cap_change_7d_pct": -0.5679
   },
   {
    "name": "USD Coin",
    "price": 0.9999001788223568,
    "symbol": "USDC",
    "peg_mechanism": "fiat-backed",
    "market_cap_usd": 72069997301.03093,
    "peg_deviation_pct": -0.01,
    "market_cap_change_1d_pct": 0.0302,
    "market_cap_change_7d_pct": -2.1372
   }
  ]
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/financial-data-x402-stablecoins-endpoint-2e21934d/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402financialdata.com](https://www.zero.xyz/host/x402financialdata.com/llms.txt)