Monitoring · x402 · active demand

Best DeFi yield opportunities across stablecoins, ETH, and BTC with risk ratings and AP…

Best DeFi yield opportunities across stablecoins, ETH, and BTC with risk ratings and APY comparisons.

by x402.ottoai.services · discovered, not yet claimed by its owner · updated 2026-10-13

30d calls20

30d payers20

MethodGET

Outputjson

Mirrored from Coinbase's public x402 Bazaar. The description is the provider's own text and has not been reviewed here; the payment requirements are copied as published.

What it does

Best DeFi yield opportunities across stablecoins, ETH, and BTC with risk ratings and APY comparisons.

Tags: defi yield · yield farming · apy comparison · stablecoin yield · bazaar · builder-code · offer-receipt · otto-content-receipt · sign-in-with-x

Call contract

Method: GET
Input: query parameters
Output: json
Last paid call: 2026-10-13

Input example from Bazaar metadata

{}

Output example

{
  "data": {
    "excludedImplausible": 0,
    "exclusions": {
      "implausible_apy": {
        "action": "excluded from all published rows and aggregates",
        "ceiling_pct": 1000,
        "count": 0,
        "reason": "implausible upstream APY"
      }
    },
    "opportunities": "=== OTTO YIELD ALPHA OPPORTUNITIES ===\nBest Stablecoin: Aave USDC 5.0% ...",
    "servingPath": "db-cache"
  },
  "meta": {
    "degraded": false,
    "generatedAt": "2026-08-10T12:00:00.000Z",
    "sourceHealth": {
      "yield-backend": "ok"
    },
    "stalenessSec": 696
  },
  "status": "success"
}

Use with an agent

Discover. Agents find this listing with GET https://bazaar.saylorinnovations.com/discovery/search?query=…, the MCP tool search_resources, or /discovery/resources.
Inspect. Fetch /resources/25836.json for the price and payment options.
Pay. Call GET https://x402.ottoai.services/yield-alpha. The provider answers 402 with its payment requirements. An x402 client signs one of the options below and retries with PAYMENT-SIGNATURE.
Execute. The provider returns 200 with the data. Agent Bazaar is not in the request path and never sees your payment.

For humans

You don't need an account or an API key; you need a wallet holding a small amount of USDC on Base, Solana, and an x402-capable client (see the examples below). Call the endpoint unpaid first to see exactly what it asks for.

Pricing & payment

Price: $0.002 / request
Protocol: x402 v2
Auth: No account or API key. Pay per request.
Networks: Base, Solana
Demand: 20 calls · 20 unique payers in 30d (public x402 Bazaar data)

x402 payment requirements

Scheme	Network	Asset	Amount	Pay to	Timeout
exact	Base eip155:8453	USDC	$0.002	0x0E84dDEdAaE6A779c462C22a59F301EC31B6b808	300s
exact	Base eip155:8453	USDC	$0.002	0x0E84dDEdAaE6A779c462C22a59F301EC31B6b808	300s
exact	Solana solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp	USDC	$0.002	6XcSfqJHr9vNW2vbiRaMqUYVm7shDgLepca54wUTDPN5	300s

accepts[] (raw JSON)

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0x0E84dDEdAaE6A779c462C22a59F301EC31B6b808",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "2000",
    "amountUsd": 0.002,
    "maxTimeoutSeconds": 300
  },
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0x0E84dDEdAaE6A779c462C22a59F301EC31B6b808",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "2000",
    "amountUsd": 0.002,
    "maxTimeoutSeconds": 300
  },
  {
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "payTo": "6XcSfqJHr9vNW2vbiRaMqUYVm7shDgLepca54wUTDPN5",
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "amount": "2000",
    "amountUsd": 0.002,
    "maxTimeoutSeconds": 300
  }
]

Schemas

Output schema (JSON Schema)

{
  "properties": {
    "example": {
      "properties": {
        "data": {
          "description": "On success: { opportunities (report text), exclusions.implausible_apy (the plausibility bound's always-present verdict), excludedImplausible (count), servingPath ('db-cache'|'live') }. On failure: an error string."
        },
        "meta": {
          "description": "Freshness block. stalenessSec = age of the cached snapshot, present only on servingPath 'db-cache' and absent on 'live'; generatedAt = when this response was built; degraded = an older good snapshot was served after a refresh failed."
        },
        "status": {
          "enum": [
            "success",
            "failed"
          ],
          "type": "string"
        }
      },
      "required": [
        "status",
        "data"
      ],
      "type": "object"
    },
    "type": {
      "type": "string"
    }
  },
  "required": [
    "type"
  ],
  "type": "object"
}

Example shape — generated from the schema, not a captured live response

{
  "example": {
    "data": null,
    "meta": null,
    "status": "success"
  },
  "type": "string"
}

Examples

curl

curl "https://x402.ottoai.services/yield-alpha"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

JavaScript

const res = await fetch("https://x402.ottoai.services/yield-alpha");
if (res.status === 402) {
  const { accepts } = await res.json();
  // pay one of accepts[] via an x402 client, then retry with the payment header
}

Python

import httpx
res = httpx.get("https://x402.ottoai.services/yield-alpha")
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header

Details

Provider: x402.ottoai.services
Endpoint: https://x402.ottoai.services/yield-alpha
Machine-readable: /resources/25836.json