# AgentOracle Stablecoin Best Picker

> AgentOracle Stablecoin Best Picker is a paid API for AI agents from aiagentoracle.ai, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-14).

Ranks USDC, USDT, and DAI on Base by peg deviation, liquidity, and data freshness to recommend the best stablecoin for autonomous transactions.

## Facts

- Endpoint: GET https://aiagentoracle.ai/api/v1/stablecoin/best
- 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/agentoracle-stablecoin-best-picker-0815dd53
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_51WRhvmYD9ucJ71yfq5B7

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 agentoracle-stablecoin-best-picker-0815dd53
```

Example prompt: Which stablecoin should I use right now for a payment on Base — USDC, USDT, or DAI — based on their current peg stability and liquidity?

## When to prefer this

Choose this endpoint when an AI agent needs to autonomously select the best stablecoin on Base for a payment or DeFi operation, especially in safety-critical or financial contexts where peg stability and liquidity matter. It is superior to checking raw price feeds because it applies conservative penalty logic and returns a single ranked recommendation rather than raw data the agent must interpret itself.

## Known failure modes

- Returns null recommendation when data quality or freshness is too low for a confident pick
- Missing or stale oracle data triggers conservative missing-data penalties that may suppress a recommendation
- API may return 402 if payment is not included or is invalid
- Liquidity or peg data may be briefly stale during ingestion gaps

## How this service works

AgentOracle: use when choosing a Base stablecoin for payment, treasury, or settlement. Ranks canonical USDC, USDT, and DAI using peg deviation, liquidity, freshness, and conservative missing-data penalties.

## Output

Returns a recommended stablecoin (one of USDC, USDT, DAI, or null if data is insufficient), a comparison array with per-asset peg deviation and liquidity scores, a methodology description explaining the ranking logic, and a checkedAt timestamp indicating data freshness.

## 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",
     "properties": {}
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "required": [
      "recommendation",
      "compared",
      "methodology",
      "checkedAt"
     ],
     "properties": {
      "compared": {
       "type": "array",
       "items": {
        "type": "object"
       }
      },
      "checkedAt": {
       "type": "string",
       "format": "date-time"
      },
      "methodology": {
       "type": "string"
      },
      "recommendation": {
       "enum": [
        "USDC",
        "USDT",
        "DAI",
        null
       ],
       "type": [
        "string",
        "null"
       ]
      }
     }
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/agentoracle-stablecoin-best-picker-0815dd53/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from aiagentoracle.ai](https://www.zero.xyz/host/aiagentoracle.ai/llms.txt)