RFS Stablecoin Yield Risk Index — x402 API

A 0–100 risk score and band for a stablecoin yield venue, paid per call in USDC. Built by RFS Consulting.

When to call it

Before parking or routing stablecoins into a lending pool, RWA, or yield product — and to re-check a venue you already hold.

Call it

With no payment you get a 402 carrying the price and payment instructions:

curl -i "https://syri.rfsrisk.ai/api/score?entity=usdc-aave-v3"

An x402-aware client or agent pays the quoted USDC and retries automatically, then receives:

{
  "entity": "USDC — Aave V3",
  "composite_score": 82,
  "tier": "Moderate",
  "view": "summary",
  "methodology_version": "SYRI-2026.2",
  "as_of": "..."
}

Price and network

• $0.05 USDC per entity, settled on Base mainnet via x402.
• One entity per paid call. An unmapped entity returns 404 and is not charged.

Coverage

Six stablecoin yield venues, including USDC on Aave V3, USDC on Morpho Steakhouse, sDAI (Sky Savings Rate), USDe (Ethena), OUSG (Ondo US Govt Bond) and eUSD.

The live, authoritative list — with slugs, pricing and methodology version — is free and unpaid, so an agent can read the menu before deciding to buy:

curl "https://syri.rfsrisk.ai/api/catalog"

What isn't sold here

The five-factor breakdown — Reserve Safety, Yield Quality, Oracle Integrity, Collateral Diversity, Liquidity — along with the reasoning behind a score, is not available through this endpoint. That is an RFS engagement. This API sells the number; the engagement sells the judgment.