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Base Launch Guard
x402
Base Launch Guard is a paid API for AI agents from guard.facts402.com, paid per call via x402, $0.05/call, status unknown (last checked 2026-11-01).
Performs a comprehensive on-chain safety audit of a Base ERC-20 token, returning a SAFE/CAUTION/DANGER verdict with risk score and detailed findings on honeypot, taxes, liquidity, and rug pull indicators.
Price / call$0.05
Success—
StatusUnknown
How this service works
Use when an agent is about to buy a Base token or memecoin: honeypot check and rug check in one call. Simulated buy/transfer/sell, buy/sell tax, exit price impact at your size, sniper/bundle/insider forensics, deployer rug pull history, owner powers, LP lock. Returns SAFE/CAUTION/DANGER, risk_score 0-100 and reasons. $0.05 USDC on Base; invalid input is a 400 before payment; charged only on 2xx.
Output
Returns a JSON object with a top-level verdict (SAFE, CAUTION, or DANGER), a risk_score from 0–100, and an array of reason codes with severity levels. Detailed sub-reports cover: honeypot simulation (simulated buy/transfer/sell), buy and sell tax percentages, exit liquidity simulation showing net USD received and price impact at the given position size, LP lock status and locked percentage, market data (liquidity, volume, pool age, FDV), deployer history, and insider/sniper/bundle forensics.
Example use cases
Pre-buy rug pull screening
“Before I ape into this Base memecoin at 0x4ed4e862860bed51a9570b96d89af5e1b0efefed, can you check if it's a honeypot or rug pull risk? I'm thinking of putting in $1000.”
Exit liquidity check before selling
“I'm holding a position in the Base token at 0xabc1234567890abcdef1234567890abcdef1234 and I want to sell $2500 worth — can you simulate the exit liquidity and tell me the price impact and whether I'd actually get my money out?”
New launch insider forensics
“This token on Base just launched — 0xdef9876543210fedcba9876543210fedcba9876 — can you check for sniper activity, insider wallets, and whether the deployer has rugged projects before? I want to know the risk score before trading.”
Technical details
Endpoint
POSThttps://guard.facts402.com/v1/guard/check?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a comprehensive, all-in-one safety audit specifically for Base mainnet ERC-20 tokens before trading or as part of a DeFi agent workflow. It combines honeypot detection, tax analysis, exit liquidity simulation at a custom position size, LP lock verification, and deployer/insider forensics in a single call — making it superior to running these checks individually. Prefer it over generic token screeners when you need Base-specific rug pull intelligence and need a machine-readable verdict with risk score for automated decision-making.
Side effects
- Token not indexed — forensics and deployer data unavailable, returns DATA_UNAVAILABLE_NOT_INDEXED info codes
- Non-Base contract address — endpoint only supports chain id 8453
- Invalid contract address format — 400 error if not a valid 0x ERC-20 address
- Concentrated liquidity pool — LP lock percentage cannot be measured, returns LP_LOCK_UNKNOWN_CL
- Trade simulation reverted — honeypot or exit sim may return incomplete results
- Position size out of range (below $1 or above $10M) — validation error
- Payment failure — x402 payment of $0.05 USDC not completed
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| token | string | Base mainnet (chain id 8453) ERC-20 token contract address |
| position_usd | number | Position size in USD for the exit-liquidity simulation (default 500) |
Output
Schema · Response
{
"type": "json",
"example": {
"lp": {
"data": {
"kind": "cl",
"note": "concentrated-liquidity positions are NFTs; burn/lock cannot be measured from LP token balances",
"pool": "0xc9034c3e7f58003e6ae0c8438e7c8f4598d5acaa",
"burned_pct": null,
"locked_pct": null,
"lock_status": "unknown_cl",
"lockers_checked": [],
"lp_total_supply": null,
"burned_or_locked_pct": null
},
"detail": null,
"reason": null,
"status": "ok"
},
"exit": {
"data": {
"pool": {
"fee": 3000,
"kind": "uniswap_v3",
"stable": null,
"address": "0xc9034c3e7f58003e6ae0c8438e7c8f4598d5acaa",
"quote_token": "0x4200000000000000000000000000000000000006",
"quote_reserve_usd": 119650.42
},
"untaxed": false,
"exit_trap": false,
"sims_used": 4,
"position_usd": 500,
"amount_tokens": "574780000000000000000000",
"net_received_usd": 494.31,
"price_impact_pct": 0.84,
"net_received_quote": "216250000000000000",
"trade_simulation_reverted": false,
"max_position_usd_for_3pct_impact": 3620
},
"detail": null,
"reason": null,
"status": "ok"
},
"block": 53330000,
"chain": "base",
"token": "0x4ed4e862860bed51a9570b96d89af5e1b0efefed",
"cached": false,
"market": {
"data": {
"pairs": 1,
"fdv_usd": 31253993,
"buys_24h": 845,
"index_24h": null,
"main_pair": {
"address": "0xc9034c3e7f58003e6ae0c8438e7c8f4598d5acaa",
"dex_id_untrusted": "uniswap",
"labels_untrusted": [
"v3"
],
"pair_url_untrusted": "https://dexscreener.com/base/0xc9034c3e7f58003e6ae0c8438e7c8f4598d5acaa",
"quote_symbol_untrusted": "WETH"
},
"price_usd": 0.0008699,
"sells_24h": 1374,
"index_status": "DATA_UNAVAILABLE_NOT_INDEXED",
"liquidity_usd": 246931.3,
"content_origin": "third_party_untrusted",
"pool_age_hours": 24928.49,
"volume_24h_usd": 46179.42,
"pool_created_at": "2024-01-07T19:30:45+00:00",
"total_liquidity_usd": 246931.3
},
"detail": null,
"reason": null,
"status": "ok"
},
"verdict": {
"reasons": [
{
"code": "DATA_UNAVAILABLE_NOT_INDEXED",
"detail": "forensics unavailable: token or its pools are not in our index",
"severity": "info"
},
{
"code": "DATA_UNAVAILABLE_NOT_INDEXED",
"detail": "deployer unavailable: token is not in our index",
"severity": "info"
},
{
"code": "LP_LOCK_UNKNOWN_CL",
"detail": "concentrated-liquidity pool: LP burn/lock cannot be measured",
"severity": "info"
}
],
"verdict": "SAFE",
"risk_score": 0
},
"chain_id": 8453,
"contract": {
"data": {
"name": "Degen",
"owner": null,
"proxy": null,
"symbol": "DEGEN",
"scanned": "contract",
"decimals": 18,
"verified": null,
"is_contract": true,
"capabilities": [
{
"capability": "ownership_roles",
"signatures": [
"transferOwnership(address)",
"renounceOwnership()"
]
}
],
"total_supply": "36965961105223000000000000000",
"content_origin": "third_party_untrusted",
"owner_renounced": true,
"verified_reason": "DATA_UNAVAILABLE_BLOCKSCOUT_BLOCKED",
"bytecode_size_bytes": 6419,
"is_eip7702_delegated_eoa": false
},
"detail": null,
"reason": null,
"status": "ok"
},
"deployer": {
"data": null,
"detail": "token is not in our index",
"reason": "DATA_UNAVAILABLE_NOT_INDEXED",
"status": "unavailable"
},
"presence": {
"data": {
"socials": [
{
"url": "https://twitter.com/degentokenbase",
"type": "twitter"
},
{
"url": "https://t.me/degentokenbase",
"type": "telegram"
}
],
"website": [
"https://www.degen.tips/",
"https://farcaster.xyz/~/channel/degen"
],
"has_presence": true,
"domain_status": "ok",
"content_origin": "third_party_untrusted",
"domain_created": "2024-01-04T21:14:04+00:00",
"domain_age_days": 1030,
"domain_untrusted": "degen.tips",
"website_younger_than_pool": false
},
"detail": null,
"reason": null,
"status": "ok"
},
"forensics": {
"data": null,
"detail": "token or its pools are not in our index",
"reason": "DATA_UNAVAILABLE_NOT_INDEXED",
"status": "unavailable"
},
"disclaimer": "Automated on-chain facts and rules-based flags. Not investment advice.",
"simulation": {
"data": {
"pool": {
"fee": 3000,
"kind": "uniswap_v3",
"stable": null,
"address": "0xc9034c3e7f58003e6ae0c8438e7c8f4598d5acaa",
"quote_token": "0x4200000000000000000000000000000000000006",
"quote_reserve_usd": 119650.42
},
"buy_ok": true,
"gas_buy": 118402,
"sell_ok": true,
"gas_sell": 126930,
"honeypot": false,
"approve_ok": true,
"buy_tax_pct": 0,
"transfer_ok": true,
"gas_transfer": 34811,
"sell_tax_pct": 0,
"content_origin": "third_party_untrusted",
"transfer_tax_pct": 0,
"revert_reason_untrusted": null
},
"detail": null,
"reason": null,
"status": "ok"
},
"data_sources": [
"Base mainnet JSON-RPC (block-pinned eth_call / eth_getCode / eth_getStorageAt, state-override trade simulation)",
"Base Quartet index (pools, swaps, wallet funding, deployers)",
"DexScreener API (pairs, liquidity, volume, token info)",
"Blockscout API (source verification)",
"RDAP via the IANA bootstrap registry (domain registration date)"
],
"generated_at": "2026-10-31T12:00:00+00:00",
"position_usd": 500
}
}Tags
x402
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