# ERC-20 Token Risk Analyzer (x402) > ERC-20 Token Risk Analyzer (x402) is a paid API for AI agents from freetier-agent-api.pages.dev, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-30). Analyzes an ERC-20 token contract address on Base or Ethereum and returns a risk score, flags, liquidity data, and a safety verdict using on-chain heuristics. ## Facts - Endpoint: GET https://freetier-agent-api.pages.dev/api/token-risk?utm_source=zero.xyz - Price: $0.005/call - Payment: x402 - Status: unknown - Last checked: 2026-10-30 - Activations on Zero: 0 - Tags: x402 - Canonical page: https://www.zero.xyz/c/erc-20-token-risk-analyzer-x402-4898f5dc - Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_YNZT571eTEkQn6MnMsiwU Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently. ## How to call it through Zero Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`): ```sh zero fetch --capability erc-20-token-risk-analyzer-x402-4898f5dc ``` Example prompt: Can you run a risk check on this token — contract address 0x4ed4e862860bed51a9570b96d89af5e1b0efefed on Base — and tell me the risk score, any red flags like pausable transfers, and whether the owner has been renounced? ## When to prefer this Choose this endpoint when you need a fast, pay-per-call (no signup) on-chain token risk assessment for Base or Ethereum ERC-20 tokens. It is ideal for AI agents that need to programmatically screen tokens before trades, surface rug-pull signals, or audit token contracts without setting up API keys. Prefer this over manual block explorer inspection or expensive subscription risk APIs when operating in an autonomous, low-friction crypto research workflow. ## Known failure modes - Invalid or non-contract address returns isContract: false or an error - Unsupported chain value returns a validation error - Token with no on-chain liquidity may return null liquidity fields - Payment failure via x402 (insufficient USDC balance) results in 402 response - RPC node timeout or unavailability may cause partial or failed response - Contract with obfuscated bytecode may result in incomplete flag detection ## How this service works Invoice-to-JSON, on-chain tools (transaction explainer + payment check, wallet profile, contract ABI, ERC-20 token risk), company contacts and web-to-RAG for AI agents. Pay per call with x402 (USDC on Base). No signup, no API key. ## Output Returns a JSON object with the token's name, symbol, chain, contract address, a numeric risk score (0–100), a verdict string (e.g. 'no_major_red_flags_found'), an array of risk flags with severity levels and evidence, liquidity pool data (pools, approximate liquidity in USD, burned percentage, owner share), whether the contract is a proxy, whether the owner is renounced, total supply, decimals, and a disclaimer. Also includes the RPC used, the block at which it was checked, and a list of checks not performed (e.g. honeypot sell simulation). ## Request schema (JSON Schema) ```json { "type": "object", "$schema": "https://json-schema.org/draft/2020-12/schema", "required": [ "input" ], "properties": { "input": { "type": "object", "required": [ "type", "method" ], "properties": { "type": { "type": "string", "const": "http" }, "method": { "enum": [ "GET" ], "type": "string" }, "queryParams": { "type": "object", "required": [ "address" ], "properties": { "chain": { "enum": [ "base", "ethereum" ], "type": "string" }, "address": { "type": "string", "description": "token contract address 0x..." } } } } }, "output": { "type": "object", "required": [ "type" ], "properties": { "type": { "type": "string" }, "example": { "type": "object", "properties": { "rpc": { "type": [ "string", "null" ] }, "name": { "type": [ "string", "null" ] }, "chain": { "type": [ "string", "null" ] }, "flags": { "type": "array", "items": { "type": [ "object", "null" ] } }, "owner": { "type": [ "string", "null" ] }, "proxy": {}, "method": { "type": [ "string", "null" ] }, "symbol": { "type": [ "string", "null" ] }, "address": { "type": [ "string", "null" ] }, "sources": { "type": "array", "items": { "type": [ "object", "null" ] } }, "verdict": { "type": [ "string", "null" ] }, "decimals": { "type": [ "number", "null" ] }, "liquidity": { "type": "object", "properties": { "pools": { "type": [ "array", "null" ] }, "ethUsd": { "type": [ "number", "null" ] }, "burnedPct": { "type": [ "number", "null" ] }, "poolSharePct": { "type": [ "number", "null" ] }, "ownerSharePct": { "type": [ … (truncated) ``` ## Response schema (JSON Schema) ```json { "type": "json", "example": { "rpc": "https://base-rpc.publicnode.com", "name": "Degen", "chain": "base", "flags": [ { "key": "pause", "label": "Transfers can be paused", "evidence": { "selectors": [ "0x8456cb59" ] }, "severity": "medium" } ], "owner": "0x704ec5c12ca20a293c2c0b72b22619a4231f3c0d", "method": "Deterministic heuristics over public on-chain data via JSON-RPC (bytecode selector scan, EIP-1967/1167 proxy slots, owner(), DEX factory lookups, Chainlink E...", "symbol": "DEGEN", "address": "0x4ed4e862860bed51a9570b96d89af5e1b0efefed", "sources": [ { "url": "https://www.publicnode.com/", "name": "Public JSON-RPC endpoints (publicnode, Tenderly, Blast, base.org, with failover; batched): eth_call, eth_getCode, eth_getStorageAt; Uniswap v2/v3, Aerodrome ..." } ], "verdict": "no_major_red_flags_found", "decimals": 18, "liquidity": { "pools": [ { "dex": "uniswap-v2", "pool": "0x7c327d692b72f60b28aecedbcc1ba784712fe7b2", "quote": "WETH", "quoteBalance": 0.0208, "quoteSideUsd": 48, "tokenBalance": 53144.7496 } ], "ethUsd": 2323.21697782, "burnedPct": 0, "poolSharePct": 0.78, "ownerSharePct": 0.52, "approxLiquidityUsd": 489006 }, "riskScore": 16, "disclaimer": "Automated heuristic check of public on-chain data. Not financial advice; a clean result does not mean a token is safe.", "isContract": true, "notChecked": [ "honeypot sell simulation" ], "totalSupply": 35957026406.6835, "scoreMeaning": "Sum of flag weights (high 30, medium 12, low 4), capped at 100. Measures what an owner/admin can do to holders and how thin liquidity is; it is not a scam pr...", "checkedAtBlock": 53038058, "ownerRenounced": false } } ``` ## More - Live health (JSON, refreshed every minute): https://www.zero.xyz/c/erc-20-token-risk-analyzer-x402-4898f5dc/health.json - [Zero catalog index](https://www.zero.xyz/llms.txt) - [Other services from freetier-agent-api.pages.dev](https://www.zero.xyz/host/freetier-agent-api.pages.dev/llms.txt)