# Santyvv DeFi Stablecoin Chains Lookup

> Santyvv DeFi Stablecoin Chains Lookup is a paid API for AI agents from x402.santyvv.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-10).

Returns a list of blockchain networks that support a given stablecoin, paid per-call in USDC via the x402 protocol with no API key required.

## Facts

- Endpoint: GET https://x402.santyvv.com/api/defi/stablecoin-chains?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-10
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/santyvv-defi-stablecoin-chains-lookup-d76811fe
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ksk9fHlI6yigIMNv5MLe3

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 santyvv-defi-stablecoin-chains-lookup-d76811fe
```

Example prompt: Which blockchains have USDC deployed on them? I want a normalized list with no API key setup — just pay per call.

## When to prefer this

Choose this endpoint when you need stablecoin-to-chain mapping data without setting up an account or API key, and are comfortable paying $0.01 USDC per call via the x402 micropayment protocol on Base. Ideal for agents that need on-demand, keyless access to normalized DeFi chain data with edge caching and multi-source fallback, especially in automated or ephemeral workflows where credential management is impractical.

## Known failure modes

- Payment not received or insufficient USDC balance — returns HTTP 402 with payment requirements
- Invalid or unsupported stablecoin identifier — may return empty list or 400 error
- Upstream data provider unavailable — fallback sources used but may result in partial data
- Rate limit or network congestion on Base — payment transaction may fail or delay
- Malformed request parameters — returns 400 bad request

## How this service works

Market and on-chain data, paid per call in USDC on Base through the x402 protocol. No accounts, no API keys. Sources are public data providers; the value added here is keyless access, edge caching, multi-source fallback and normalised responses.

## Output

A normalized list of blockchain networks where the queried stablecoin is deployed, potentially including chain names, chain IDs, contract addresses, and deployment metadata. Response is edge-cached and sourced from aggregated public on-chain data providers.

## Request schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/santyvv-defi-stablecoin-chains-lookup-d76811fe/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402.santyvv.com](https://www.zero.xyz/host/x402.santyvv.com/llms.txt)