Base token risk / safety check (remote)

Remote, no install needed. One call reads Base mainnet chain state (no third-party risk database) and returns
contract risk signals, each with the block number and evidence.

Price

$0.009 USDC per call. Invalid addresses, bad checksums and EOAs (no contract code) are rejected with 400
before payment, so they are not charged.

Endpoint

GET /v1/onchain/base/token-risk?address=<token contract on Base>

• address (required): Token contract on Base mainnet (0x + 40 hex; mixed case must be a valid EIP-55 checksum). EOAs, bad checksums → 400 before payment (not charged)

What it checks (from the endpoint description): JSON contract risk signals with block+evidence: honeypot test (buy/sell simulation, taxes), rug-pull signals (owner, mint/pause/blacklist/fee functions, proxy+admin, owner-held supply, Uniswap v2/v3/v4 + Aerodrome pool depth), notChecked. Signals, not a safe verdict.

Response 200 includes riskLevel, summary (counts by severity), token, contract (proxy, owner, matched
selectors), liquidity (pools and approximate depth), supplyHeld, simulation (buyOk, sellOk, taxes),
signals[] (id, severity, title, method, block, evidence), checksRun, notChecked and a disclaimer.

How to read the result

• Treat it as evidence to weigh, not a guarantee: notChecked lists what could not be verified.
• simulation.sellOk: false or a high sellTaxPct is the classic honeypot signal.
• Owner-controlled mint, pause, blacklist or fee functions and an upgradeable proxy with an EOA admin are common
  rug-pull levers; check contract.owner.type (renounced, eoa, contract, undeclared, unknown).

How to call (remote, no install needed)

Nothing to install or host: this skill calls the remote 1gateway API over HTTPS. Each call is paid per request
with USDC on Base through the x402 protocol (HTTP 402). No signup, no API key.

1. Optional, free: see the exact price. An unpaid request returns HTTP 402 with a PAYMENT-REQUIRED header
   (base64 JSON quote). curl -i "https://1gateway.dev/v1/onchain/base/token-risk?address=0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
2. Pay and get the data with any x402 client that has a funded Base wallet, for example:
   • npx agentcash fetch "https://1gateway.dev/v1/onchain/base/token-risk?address=0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913" (AgentCash wallet)
   • npx awal x402 pay "https://1gateway.dev/v1/onchain/base/token-risk?address=0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913" (Coinbase Agentic Wallet)
   • Node: @x402/fetch, see below
3. Billing: payment settles only after a 2xx response. Any 4xx/5xx (bad input, no data, upstream error) is not
   charged. Inputs are validated before the 402 wherever possible.

// npm i @x402/fetch @x402/evm viem
import { wrapFetchWithPaymentFromConfig } from "@x402/fetch";
import { ExactEvmScheme } from "@x402/evm";
import { privateKeyToAccount } from "viem/accounts";
const payFetch = wrapFetchWithPaymentFromConfig(fetch, {
  schemes: [{ network: "eip155:8453", client: new ExactEvmScheme(privateKeyToAccount(process.env.X402_WALLET_KEY as `0x${string}`)) }],
  spendControls: { maxAmountPerPayment: "$0.01" }, // refuse anything pricier than expected
});
const res = await payFetch("https://1gateway.dev/v1/onchain/base/token-risk?address=0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913");
console.log(await res.json());

More

• Every route, parameter and response shape: https://1gateway.dev/agents.md · OpenAPI: https://1gateway.dev/openapi.json
• Remote MCP server (same tools): https://1gateway.dev/mcp (tools/list free, tools/call paid with x402)
• Status and uptime: https://1gateway.dev/status
• Prices here are from the 1gateway catalog as of 2026-10-17; the 402 quote is always authoritative.