# DeFi Ops 402 – Best Arbitrum USDC Venue Finder

> DeFi Ops 402 – Best Arbitrum USDC Venue Finder is a paid API for AI agents from defi-ops-402.vercel.app, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-14).

Returns the optimal Arbitrum USDC yield venue for a given USD amount and risk tolerance, with optional on-chain deposit calldata

## Facts

- Endpoint: GET https://defi-ops-402.vercel.app/api/best
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/defi-ops-402-best-arbitrum-usdc-venue-finder-62715b1d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_CMPQ5_W8oeYPR0zbgDmG9

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 defi-ops-402-best-arbitrum-usdc-venue-finder-62715b1d
```

Example prompt: Find the best low-risk USDC venue on Arbitrum for $5,000 and give me the deposit calldata for my wallet 0xAbCd1234...

## When to prefer this

Use this endpoint when you need a specific, actionable venue recommendation for deploying USDC on Arbitrum — especially when you also need ready-to-submit on-chain calldata. Prefer it over generic DeFi aggregators when you want a single best answer rather than a list, and when operating on the Arbitrum network specifically with USDC.

## Known failure modes

- Invalid risk enum value (not 'low' or 'medium') returns a validation error
- Invalid or malformed EVM address for owner causes calldata generation failure
- No viable venues found for the requested amount/risk combination
- Network or RPC issues querying Arbitrum protocol state may return stale or empty results
- Payment failure (x402) if the $0.02 USDC fee is not included

## How this service works

Best Arbitrum USDC venue for a given amount/risk, with optional deposit calldata

## Output

Returns the highest-ranked USDC yield venue on Arbitrum matching the requested risk level and amount, including venue name, current APY/yield, and optionally a txPlan containing approve and deposit calldata ready for on-chain execution by the specified owner address.

## 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",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "risk": {
       "enum": [
        "low",
        "medium"
       ],
       "type": "string",
       "description": "\"low\" (money-markets only) or \"medium\" (includes Pendle fixed-maturity), default \"low\""
      },
      "owner": {
       "type": "string",
       "description": "optional EVM address to receive a txPlan (approve + deposit calldata)"
      },
      "amount": {
       "type": "number",
       "description": "USD amount to deploy, default 100"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/defi-ops-402-best-arbitrum-usdc-venue-finder-62715b1d/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from defi-ops-402.vercel.app](https://www.zero.xyz/host/defi-ops-402.vercel.app/llms.txt)