ToolVet
75trust / 100

Defi Execution Snapshot

by Straelo Relay in Onchain & crypto

x402 APIPassing, checked 4 h ago

Compare read-only Base swap quotes from 1inch and KyberSwap, returning normalized comparable output, consensus, dispersion, quote evidence, and explicit provider limitations without executing a swap.

POST
https://relay.straelo.com/defi-execution-snapshot
Price
$0.02
per call in USDC
Uptime
100%
last 30 days
Response time
565 ms
676 ms slowest 5%
Last check
Passed
4 h ago, next any minute now

Run a free test callHow to call it

Reliability

All checks passedSome failedAll failedNot checked

Status and outage history · Atom feed · Watch with other listings

How to call it

POST https://relay.straelo.com/defi-execution-snapshot

Each call costs $0.02 in USDC on Base, paid with the request over x402.

Run a free test callOne unpaid request, the way an agent sends it. You see the payment challenge it gets back. Nothing is charged.

Example request

From the listing.

POST https://relay.straelo.com/defi-execution-snapshot
content-type: application/json

{
  "amount_in": "0.1",
  "chain": "base",
  "slippage_bps": 50,
  "token_in": "WETH",
  "token_out": "USDC"
}

Parameters

ParameterTypeRequiredDescription
amount_instringYesPositive decimal input amount, converted exactly to raw token units.
baseline_providerstringNoOptional provider used only for a direct economic comparison. One of: oneinch, kyberswap.
chainstringYesBase Mainnet only in this quote-only MVP. One of: base.
slippage_bpsintegerYesSlippage tolerance in basis points; it is not treated as a cost.
token_instringYesInput Base asset symbol. One of: USDC, USDT, ETH, WETH.
token_outstringYesOutput Base asset symbol; must differ from token_in. One of: USDC, USDT, ETH, WETH.

Example response

The provider's example. We can't check it without paying.

{
  "best_provider": "kyberswap",
  "confidence": "MEDIUM",
  "consensus": {
    "basis": "gross_output_only",
    "comparable_output_raw": 0
  },
  "economic_advantage": null,
  "economics": {
    "total_estimated_cogs_usd": null
  },
  "evidence_quality": {},
  "observed_at": "2026-01-01T00:00:00Z",
  "partial": false,
  "provider_failures": [],
  "quotes": [],
  "status": "COMPARISON_AVAILABLE",
  "usage": {
    "provider_calls": []
  }
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.02.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://relay.straelo.com/defi-execution-snapshot' \
  -H 'content-type: application/json' \
  --data-raw '{"amount_in":"0.1","chain":"base","slippage_bps":50,"token_in":"WETH","token_out":"USDC"}'

# x402 v2 sends the challenge base64-encoded in the PAYMENT-REQUIRED header (v1 sends it in the body).
# To read the header:
curl -sS -g -o /dev/null -D - -X POST 'https://relay.straelo.com/defi-execution-snapshot' \
  -H 'content-type: application/json' \
  --data-raw '{"amount_in":"0.1","chain":"base","slippage_bps":50,"token_in":"WETH","token_out":"USDC"}' \
  | grep -i '^payment-required:' | cut -d' ' -f2 | tr -d '\r' | base64 --decode
JavaScript: pay and call
// npm i @x402/fetch @x402/evm viem
import { wrapFetchWithPayment, x402Client } from "@x402/fetch";
import { registerExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

// Pays at most $0.02 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.02" });
registerExactEvmScheme(client, { signer: privateKeyToAccount(process.env.EVM_PRIVATE_KEY) });
const pay = wrapFetchWithPayment(fetch, client);

// Not sure it's safe to pay? ToolVet checks it first for $0.005. Pay for that from a separate
// client: this one is capped at $0.02 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Frelay.straelo.com%2Fdefi-execution-snapshot&method=POST
const res = await pay("https://relay.straelo.com/defi-execution-snapshot", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "amount_in": "0.1",
    "chain": "base",
    "slippage_bps": 50,
    "token_in": "WETH",
    "token_out": "USDC"
  }),
});
console.log(res.status, await res.text());
Python: pay and call
# pip install "x402[requests,evm]"
import os
from eth_account import Account
from x402 import x402ClientSync
from x402.http.clients import x402_requests
from x402.mechanisms.evm import EthAccountSigner
from x402.mechanisms.evm.exact.register import register_exact_evm_client

# Pays at most $0.02 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.02"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://relay.straelo.com/defi-execution-snapshot",
        json={
            "amount_in": "0.1",
            "chain": "base",
            "slippage_bps": 50,
            "token_in": "WETH",
            "token_out": "USDC",
        },
    )
    print(res.status_code, res.text)

Security scan

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Recent checks

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