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Stablecoin Market Data API (x402)
x402
Stablecoin Market Data API (x402) is a paid API for AI agents from kr-x402-mvp.kgy5612.workers.dev, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-31).
Returns real-time stablecoin market metrics including peg deviation, supply trends, dominance, and liquidity verdict for top stablecoins, paid per-call via x402 USDC micropayment.
Price / call$0.001
Success—
StatusUnknown
How this service works
Pay-per-call crypto microdata for trading/onchain AI agents via x402 (USDC on Base): Base gas, token risk, balances, multi-venue prices, Hyperliquid book/funding, kimchi premium. No API keys.
Output
Returns a JSON object with a list of stablecoin entries (symbol, USD price, Kraken reference price, peg deviation in basis points, total supply USD, dominance %, 1d/7d supply change %, Base chain supply), plus aggregate fields: total stablecoin supply, 7-day flow (USD and %), liquidity trend label, overall verdict (e.g. ALL_PEGGED), any active alerts, data sources, and timestamp.
Example use cases
Depeg risk check before trade
“Before I swap into USDC, can you quickly check if it's holding its peg and whether there are any stablecoin alerts I should know about?”
Stablecoin dominance comparison
“Show me the top 5 stablecoins by supply right now — I want to see their dominance percentages and whether any are gaining or losing ground over the past 7 days.”
Onchain agent liquidity sanity check
“Pull the current stablecoin market overview for USDC and USDT — I need peg deviation in basis points, 7-day supply flow, and the overall verdict before my agent executes a large swap.”
Technical details
Endpoint
GEThttps://kr-x402-mvp.kgy5612.workers.dev/v1/crypto/stablecoins?utm_source=zero.xyzWhen to prefer
Choose this endpoint when your agent needs real-time stablecoin peg health, supply dynamics, and market dominance without requiring an API key — especially useful for trading bots or onchain agents that already transact in USDC on Base and can pay the $0.001 micropayment via x402. Prefer this over general crypto price APIs when stablecoin-specific signals (peg deviation bps, supply flow, depeg verdict) are the primary concern.
Side effects
- Payment not submitted or x402 handshake fails — 402 Payment Required response
- Invalid symbol string causes empty coins array
- top parameter out of 1-30 range — 400 Bad Request
- Upstream DefiLlama or Kraken API unavailable — stale or missing data
- Rate limit or worker timeout on high-load periods
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"coins": [
{
"status": "OK",
"symbol": "USDC",
"price_usd": 0.99948,
"kraken_usd": 0.9999,
"supply_usd": 71356496475,
"peg_dev_bps": -5.2,
"dominance_pct": 24.6,
"supply_1d_pct": 0.089,
"supply_7d_pct": -1.74,
"base_supply_usd": 4100000000
}
],
"alerts": [],
"flow_7d": {
"pct": -0.72,
"usd": -2100000000
},
"sources": [
"https://stablecoins.llama.fi",
"https://api.kraken.com"
],
"verdict": "ALL_PEGGED",
"updated_at": "2026-10-29T12:30:00Z",
"liquidity_trend": "flat",
"total_usd_stablecoin_supply": 290000000000
}
}Tags
x402
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