# RFS SYRI – Stablecoin Yield Risk Index

> RFS SYRI – Stablecoin Yield Risk Index is a paid API for AI agents from syri.rfsrisk.ai, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-14).

Returns a 0–100 composite risk score and tier (Conservative / Moderate / Speculative) for a named stablecoin yield venue such as Aave, Morpho, Ondo, or Ethena.

## Facts

- Endpoint: GET https://syri.rfsrisk.ai/api/score
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/rfs-syri-stablecoin-yield-risk-index-64c99861
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_FRIyqBoHFKna84-tdsxji

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 rfs-syri-stablecoin-yield-risk-index-64c99861
```

Example prompt: Before I move $50k USDC into the Aave v3 lending pool, can you pull the SYRI risk score for usdc-aave-v3 and tell me whether it's Conservative, Moderate, or Speculative?

## When to prefer this

Use this endpoint when an AI agent or automated system needs a quick, structured risk signal before routing or parking stablecoins into a yield venue. It is the right choice when you need a pre-built, regularly updated index score rather than running your own on-chain analysis. Particularly valuable for Aave, Morpho, Ondo, Ethena, Sky, and Reserve protocols. Prefer this over generic DeFi data APIs when you need a single normalized risk number and tier rather than raw TVL or APY data.

## Known failure modes

- Unknown or misspelled entity slug returns an error or empty result
- Stale data if the venue has not been recently re-scored (check as_of timestamp)
- Payment failure (x402) if USDC balance is insufficient
- Rate limiting if too many calls are made in quick succession
- Newly launched protocols may not yet be covered

## How this service works

RFS Stablecoin Yield Risk Index (SYRI): a 0–100 risk score and band (Conservative / Moderate / Speculative) for a stablecoin yield venue. Call BEFORE parking or routing stablecoins into a lending pool, RWA, or yield product to check its risk. Covers Aave, Morpho, Ondo, Ethena, Sky, Reserve, and more. By RFS Consulting

## Output

Returns a JSON object containing: the entity slug, a composite_score (0–100 where higher = lower risk), a tier enum ('Conservative', 'Moderate', or 'Speculative'), a tier_label, an as_of timestamp, methodology_version, and optional disclaimer and license fields.

## 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",
     "required": [
      "entity"
     ],
     "properties": {
      "entity": {
       "type": "string",
       "examples": [
        "usdc-aave-v3",
        "ousg",
        "usde",
        "sdai",
        "usdc-morpho"
       ],
       "description": "Stablecoin yield venue to score — slug, token, protocol, or alias."
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "required": [
      "entity",
      "composite_score",
      "tier",
      "as_of"
     ],
     "properties": {
      "tier": {
       "enum": [
        "Conservative",
        "Moderate",
        "Speculative"
       ],
       "type": "string"
      },
      "view": {
       "type": "string"
      },
      "as_of": {
       "type": "string",
       "format": "date-time"
      },
      "entity": {
       "type": "string"
      },
      "license": {
       "type": "string"
      },
      "disclaimer": {
       "type": "string"
      },
      "tier_label": {
       "type": "string"
      },
      "composite_score": {
       "type": "number",
       "description": "SYRI 0–100; higher = lower risk."
      },
      "methodology_version": {
       "type": "string"
      }
     }
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/rfs-syri-stablecoin-yield-risk-index-64c99861/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from syri.rfsrisk.ai](https://www.zero.xyz/host/syri.rfsrisk.ai/llms.txt)