Security · x402 · early usage

USDC yield, best lending rates now ($0.002): supply and borrow APY of USDC on every Aav…

USDC yield, best lending rates now ($0.002): supply and borrow APY of USDC on every Aave v3, Spark and Compound v3 market (Ethereum, Base, Arbitrum, Optimism, Polygon), utilization and size, highest APY first, read on chain every 10 minutes. Use to park idle…

by api.marketintelligenceapi.com · discovered, not yet claimed by its owner · updated 2026-10-08

30d calls4

30d payers3

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

Tags: usdc yield · stablecoin yield · lending rates · apy · aave · bazaar

Call contract

Method: GET
Input: HTTP request
Output: json
Last paid call: 2026-10-08

No input exampleProvider did not publish one in Bazaar metadata.

Output example

{
  "bestSupplyByAsset": {
    "USDC": {
      "chain": "base",
      "protocol": "compound_v3",
      "supplyApyPercent": 6.14
    }
  },
  "markets": [
    {
      "asset": "USDC",
      "borrowApyPercent": 7.6,
      "chain": "base",
      "protocol": "compound_v3",
      "stablecoin": true,
      "status": "ACTIVE",
      "supplyApyPercent": 6.14,
      "totalBorrowedUsd": 8775388,
      "totalSuppliedUsd": 9653893,
      "utilizationPercent": 90.9
    }
  ],
  "matching": 1
}

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/35204.json for the price and payment options.
Pay. Call GET https://api.marketintelligenceapi.com/api/v1/markets/usdc-yield. 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, Polygon, Arbitrum One, Solana, eip155:480, Base Sepolia, 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, Polygon, Arbitrum One, Solana, eip155:480, Base Sepolia
Demand: 4 calls · 3 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	0x48d5A78d480B4C32dE319C2aEF69e682Dc304615	60s
exact	Polygon eip155:137	USDC	$0.002	0x48d5A78d480B4C32dE319C2aEF69e682Dc304615	60s
exact	Arbitrum One eip155:42161	USDC	$0.002	0x48d5A78d480B4C32dE319C2aEF69e682Dc304615	60s
exact	Solana solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp	USDC	$0.002	9CAhY1vdaZfrfoto3KLQtRAo1dVWxNn5xAfmc2XbZVsf	60s
exact	eip155:480 eip155:480	0x79A02482A880bCE3F13e09Da970dC34db4CD24d1	2000	0x48d5A78d480B4C32dE319C2aEF69e682Dc304615	60s
exact	Base eip155:8453	0x60a3E35Cc302bFA44Cb288Bc5a4F316Fdb1adb42	1800	0x48d5A78d480B4C32dE319C2aEF69e682Dc304615	60s
exact	eip155:480 eip155:480	0x1C60ba0A0eD1019e8Eb035E6daF4155A5cE2380B	1800	0x48d5A78d480B4C32dE319C2aEF69e682Dc304615	60s
exact	Base Sepolia eip155:84532	USDC	2000	0x48d5A78d480B4C32dE319C2aEF69e682Dc304615	60s

accepts[] (raw JSON)

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0x48d5A78d480B4C32dE319C2aEF69e682Dc304615",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "2000",
    "amountUsd": 0.002,
    "maxTimeoutSeconds": 60
  },
  {
    "scheme": "exact",
    "network": "eip155:137",
    "payTo": "0x48d5A78d480B4C32dE319C2aEF69e682Dc304615",
    "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
    "amount": "2000",
    "amountUsd": 0.002,
    "maxTimeoutSeconds": 60
  },
  {
    "scheme": "exact",
    "network": "eip155:42161",
    "payTo": "0x48d5A78d480B4C32dE319C2aEF69e682Dc304615",
    "asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
    "amount": "2000",
    "amountUsd": 0.002,
    "maxTimeoutSeconds": 60
  },
  {
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "payTo": "9CAhY1vdaZfrfoto3KLQtRAo1dVWxNn5xAfmc2XbZVsf",
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "amount": "2000",
    "amountUsd": 0.002,
    "maxTimeoutSeconds": 60
  },
  {
    "scheme": "exact",
    "network": "eip155:480",
    "payTo": "0x48d5A78d480B4C32dE319C2aEF69e682Dc304615",
    "asset": "0x79A02482A880bCE3F13e09Da970dC34db4CD24d1",
    "amount": "2000",
    "maxTimeoutSeconds": 60
  },
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0x48d5A78d480B4C32dE319C2aEF69e682Dc304615",
    "asset": "0x60a3E35Cc302bFA44Cb288Bc5a4F316Fdb1adb42",
    "amount": "1800",
    "maxTimeoutSeconds": 60
  },
  {
    "scheme": "exact",
    "network": "eip155:480",
    "payTo": "0x48d5A78d480B4C32dE319C2aEF69e682Dc304615",
    "asset": "0x1C60ba0A0eD1019e8Eb035E6daF4155A5cE2380B",
    "amount": "1800",
    "maxTimeoutSeconds": 60
  },
  {
    "scheme": "exact",
    "network": "eip155:84532",
    "payTo": "0x48d5A78d480B4C32dE319C2aEF69e682Dc304615",
    "asset": "0x036CbD53842c5426634e7929541eC2318f3dCF7e",
    "amount": "2000",
    "maxTimeoutSeconds": 60
  }
]

Schemas

Output schema (JSON Schema)

{
  "additionalProperties": true,
  "properties": {
    "example": {
      "description": "Example JSON response returned by this endpoint"
    },
    "type": {
      "type": "string"
    }
  },
  "required": [
    "type"
  ],
  "type": "object"
}

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

{
  "example": null,
  "type": "string"
}

Examples

curl

curl "https://api.marketintelligenceapi.com/api/v1/markets/usdc-yield"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

JavaScript

const res = await fetch("https://api.marketintelligenceapi.com/api/v1/markets/usdc-yield");
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://api.marketintelligenceapi.com/api/v1/markets/usdc-yield")
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: api.marketintelligenceapi.com
Endpoint: https://api.marketintelligenceapi.com/api/v1/markets/usdc-yield
Machine-readable: /resources/35204.json