Lending Protocols

Overview

This endpoint lists the lending protocols supported on a given EVM chain. For each one, it returns the identifier, display name, and the number of pools currently tracked.

Business Value

• Protocol Discovery: Quickly identify which lending protocols are supported before querying protocol-specific endpoints.
• Coverage Insight: The poolCount field indicates the breadth of data available for each protocol, helping prioritize integration efforts.
• Cross-Protocol Comparison: Enables side-by-side comparison of protocol adoption and pool counts on a given chain.
• Integration Planning: Serves as an entry point for building dashboards or tools that aggregate lending data across multiple protocols.

Endpoint Details

URL:

https://api.cambrian.org/evm/lending/protocols

Method: GET
Authentication: Required via X-API-Key header

Query Parameters

Response Field Descriptions

Examples

1. List Supported Lending Protocols

Retrieve the list of supported lending protocols with a limit of 10 results.

curl -X GET "https://api.cambrian.org/evm/lending/protocols?limit=10" \
  -H "X-API-Key: YOUR_API_KEY" \
  -H "Content-Type: application/json"

Response:

[
  {
    "columns": [
      {
        "name": "chainId",
        "type": "UInt16"
      },
      {
        "name": "protocolId",
        "type": "LowCardinality(String)"
      },
      {
        "name": "protocolName",
        "type": "LowCardinality(String)"
      },
      {
        "name": "poolCount",
        "type": "UInt64"
      }
    ],
    "data": [
      [
        8453,
        "aave-v3",
        "Aave V3",
        15
      ],
      [
        8453,
        "euler-lend",
        "Euler Lend",
        419
      ],
      [
        8453,
        "morpho-blue",
        "Morpho Blue",
        4311
      ],
      [
        8453,
        "morpho-v1",
        "Morpho V1",
        511
      ],
      [
        8453,
        "morpho-v2",
        "Morpho V2",
        3500
      ]
    ],
    "rows": 5
  }
]

Result collections are limited to 10 items. This example returns 5 supported protocols on Base (chain ID 8453): Aave V3, Euler Lend, and three Morpho variants, along with the number of pools indexed for each.

x402 Payment Option

This endpoint also supports pay-per-use access through the x402 payment protocol (v2): pay $0.05 USDC per request using blockchain micropayments. No API key required.

Quick Start (TypeScript)

npm install @x402/fetch @x402/evm viem

import { x402Client } from "@x402/core/client";
import { ExactEvmScheme } from "@x402/evm/exact/client";
import { wrapFetchWithPayment } from "@x402/fetch";
import { privateKeyToAccount } from "viem/accounts";

const signer = privateKeyToAccount(process.env.EVM_PRIVATE_KEY as `0x${string}`);
const client = new x402Client();
client.register("eip155:*", new ExactEvmScheme(signer));

const fetchWithPayment = wrapFetchWithPayment(fetch, client);
const response = await fetchWithPayment(
  "https://x402.cambrian.org/evm/lending/protocols"
);
const data = await response.json();

Quick Start (Python)

pip install "x402[httpx]"

import asyncio, os
from eth_account import Account
from x402 import x402Client
from x402.http.clients import x402HttpxClient
from x402.mechanisms.evm import EthAccountSigner
from x402.mechanisms.evm.exact.register import register_exact_evm_client

async def main():
    client = x402Client()
    account = Account.from_key(os.getenv("EVM_PRIVATE_KEY"))
    register_exact_evm_client(client, EthAccountSigner(account))

    async with x402HttpxClient(client) as http:
        response = await http.get("https://x402.cambrian.org/evm/lending/protocols")
        print(response.json())

asyncio.run(main())

Payment Flow

1. Send a normal request to the endpoint (no API key needed)
2. Server returns 402 Payment Required with payment details
3. The x402 SDK automatically signs a payment authorization with your wallet
4. The SDK resubmits the request with the signed payment
5. Server verifies payment and returns the API response

The x402 SDK handles steps 2–5 automatically.

Network: Base (chain ID 8453) | Currency: USDC | Price: $0.05 per request