Top DEX pools by TVL

Top DEX pools (Uniswap, Sushi, Curve, Aerodrome, etc.) ranked by current TVL - filterable by chain and project. Send POST /api/dex-top-pools with no required fields (3 optional) and pay $0.001 per call over x402 or MPP (there is no free tier). It returns a JSON object with source, chain, project, count and pools.

Sourced from an open DeFi analytics yields API (keyless). Each row carries chain, project slug, symbol pair, TVL in USD, current APY, and pool ID for follow-up queries.

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Parameters

Example request

curl -i -X POST https://agent402.tools/api/dex-top-pools \
  -H "Content-Type: application/json" \
  -d '{"chain":"Base","project":"uniswap-v3","limit":5}'

Without payment this returns HTTP 402 Payment Required with the exact price for dex-top-pools; any x402 v2 or MPP client pays it and retries.

Example response

{
  "source": "defillama-yields",
  "chain": "Base",
  "project": "uniswap-v3",
  "count": 5,
  "pools": [
    {
      "pool": "abc123",
      "chain": "Base",
      "project": "uniswap-v3",
      "symbol": "WETH-USDC",
      "tvlUsd": 45000000,
      "apy": 12.3
    }
  ]
}

From an MCP client

catalog.call {
  "slug": "dex-top-pools",
  "params": {
    "chain": "Base",
    "project": "uniswap-v3",
    "limit": 5
  }
}

The hosted connector at https://agent402.tools/mcp needs a payment for dex-top-pools; the stdio package pays it from a wallet or from an AGENT402_CREDITS_KEY issued earlier. Local install: npx -y [email protected].

Errors and behavior

• Every field is optional. An input the tool rejects returns an HTTP 4xx whose body carries error, tool, expected, required and example.
• A paid call that ends in any status of 400 or above is not charged over x402, MPP or a prepaid credits key: settlement runs after the tool and only on a successful response. The exception is a Tempo push credential, a transfer the buyer sent before the call: it settles before the tool runs, so if the tool then fails the payment is recorded as a refund owed to the paying wallet.
• Wallet-only: this tool reaches the network or stored state, so it has no proof-of-work tier. A prepaid card-credits key issued earlier (Authorization: Bearer a402_...) also pays it.
• A GET or HEAD to /api/dex-top-pools returns the same 402 quote, so the price can be read without a body.
• An Idempotency-Key header makes a retried paid call replay the first 200 instead of charging again (an answer larger than 1 MB is not replayed).

Paid call (JavaScript agent)

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

const client = new x402Client();
client.setSpendControls?.({ maxAmountPerPayment: "$0.001" }); // refuse any quote above this tool's price
registerExactEvmScheme(client, { signer: privateKeyToAccount(KEY) });
const payFetch = wrapFetchWithPayment(fetch, client);

const res = await payFetch("https://agent402.tools/api/dex-top-pools", {
  method: "POST",
  headers: { "Content-Type": "application/json" },
  body: JSON.stringify({
    "chain": "Base",
    "project": "uniswap-v3",
    "limit": 5
  }),
});

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