Security · x402 · early usage

Pre-trade sellability / honeypot check for Base tokens: simulates a buy, a wallet trans…

Name: Pre-trade sellability / honeypot check for Base tokens: simulates a buy, a wallet transfer
Price: 0.02 USD
Availability: InStock

by api.x402risk.com · discovered, not yet claimed by its owner · updated 2026-09-28

30d calls1

30d payers1

MethodPOST

Outputjson

Mirrored from Coinbase's public x402 Bazaar. The description is the provider's own text and has not been reviewed here; the payment requirements are copied as published.

What it does

Pre-trade sellability / honeypot check for Base tokens: simulates a buy, a wallet transfer and a sell of a Base ERC-20 on live Base state (Uniswap v2/v3 or Aerodrome; nothing is signed or spent). Returns buy/sell/transfer success, measured tax %, revert reason and a simulation-driven verdict (ok/caution/avoid/unknown); owner/holder flags go in risk_flags. $0.02 USDC. Invalid input is not charged. Informational, not financial advice.

Tags: base · token · honeypot · sellability · tax · bazaar

Call contract

Method: POST
Input: json
Output: json
Last paid call: 2026-09-28

Input example from Bazaar metadata

{
  "amount_usd": 100,
  "token": "0x532f27101965dd16442E59d40670FaF5eBB142E4"
}

Output example

{
  "block_number": 35000000,
  "buy_ok": true,
  "buy_tax_pct": 0,
  "cached": false,
  "chain": "base",
  "chain_id": 8453,
  "disclaimer": "Informational, not financial advice. Simulation of a hypothetical buy/transfer/sell against public Base state at the stated block; it is not a guarantee that a real trade will succeed or be taxed the same way (token owners can change rules at any time). Heuristic flags can be wrong; do your own research.",
  "gas": {
    "buy": 150000,
    "sell": 133537,
    "transfer": 40000
  },
  "pool": "0xBA3F945812a83471d709BCe9C3CA699A19FB46f7",
  "product": "pretrade-check",
  "reasons": [
    "buy, transfer and sell simulated successfully with < 1% tax"
  ],
  "revert_reason": null,
  "risk_flags": [
    {
      "flag": "HAS_ACTIVE_OWNER",
      "note": "contract has an active (non-renounced) owner"
    }
  ],
  "route": "uniswap_v3:fee_10000 WETH",
  "schema_version": "1.0",
  "sell_ok": true,
  "sell_tax_pct": 0,
  "status": "ok",
  "token": "0x532f27101965dd16442E59d40670FaF5eBB142E4",
  "token_check_risk_level": "low",
  "transfer_ok": true,
  "transfer_tax_pct": 0,
  "verdict": "ok"
}

Use with an agent

Discover. Agents find this listing with GET https://bazaar.saylorinnovations.com/discovery/search?query=…, the MCP tool search_resources, or /discovery/resources.
Inspect. Fetch /resources/36558.json for the price and payment options.
Pay. Call GET https://api.x402risk.com/v1/pretrade-check. The provider answers 402 with its payment requirements. An x402 client signs one of the options below and retries with PAYMENT-SIGNATURE.
Execute. The provider returns 200 with the data. Agent Bazaar is not in the request path and never sees your payment.

For humans

You don't need an account or an API key; you need a wallet holding a small amount of USDC on Base, and an x402-capable client (see the examples below). Call the endpoint unpaid first to see exactly what it asks for.

Pricing & payment

Price: $0.02 / request
Protocol: x402 v2
Auth: No account or API key. Pay per request.
Networks: Base
Demand: 1 calls · 1 unique payers in 30d (public x402 Bazaar data)

x402 payment requirements

Scheme	Network	Asset	Amount	Pay to	Timeout
exact	Base eip155:8453	USDC	$0.02	0x8F9C3f91628497E2A72D6740022D46f87A9eB417	180s

accepts[] (raw JSON)

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0x8F9C3f91628497E2A72D6740022D46f87A9eB417",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "20000",
    "amountUsd": 0.02,
    "maxTimeoutSeconds": 180
  }
]

Schemas

Output schema (JSON Schema)

{
  "properties": {
    "example": {
      "properties": {
        "block_number": {
          "type": [
            "integer",
            "null"
          ]
        },
        "buy_ok": {
          "type": [
            "boolean",
            "null"
          ]
        },
        "buy_tax_pct": {
          "type": [
            "number",
            "null"
          ]
        },
        "cached": {
          "type": "boolean"
        },
        "chain": {
          "type": "string"
        },
        "disclaimer": {
          "type": "string"
        },
        "errors": {
          "type": "array"
        },
        "gas": {
          "type": [
            "object",
            "null"
          ]
        },
        "pool": {
          "type": [
            "string",
            "null"
          ]
        },
        "product": {
          "type": "string"
        },
        "reasons": {
          "items": {
            "type": "string"
          },
          "type": "array"
        },
        "revert_reason": {
          "type": [
            "object",
            "null"
          ]
        },
        "risk_flags": {
          "description": "Token-check owner/holder/contract flags; informational, do not affect verdict",
          "items": {
            "properties": {
              "flag": {
                "type": "string"
              },
              "note": {
                "type": "string"
              }
            },
            "type": "object"
          },
          "type": "array"
        },
        "route": {
          "type": [
            "string",
            "null"
          ]
        },
        "schema_version": {
          "type": "string"
        },
        "sell_ok": {
          "type": [
            "boolean",
            "null"
          ]
        },
        "sell_tax_pct": {
          "type": [
            "number",
            "null"
          ]
        },
        "sellability": {
          "type": "object"
        },
        "sources": {
          "type": "array"
        },
        "status": {
          "enum": [
            "ok",
            "partial",
            "error"
          ],
          "type": "string"
        },
        "token": {
          "type": "string"
        },
        "token_check": {
          "type": "object"
        },
        "token_check_risk_level": {
          "type": [
            "string",
            "null"
          ]
        },
        "transfer_ok": {
          "type": [
            "boolean",
            "null"
          ]
        },
        "transfer_tax_pct": {
          "type": [
            "number",
            "null"
          ]
        },
        "verdict": {
          "description": "Driven only by the simulation: sellability, buy/sell/transfer taxes, drained/no liquidity",
          "enum": [
            "ok",
            "caution",
            "avoid",
            "unknown"
          ],
          "type": "string"
        }
      },
      "required": [
        "schema_version",
        "token",
        "status",
        "verdict",
        "reasons",
        "risk_flags",
        "disclaimer"
      ],
      "type": "object"
    },
    "type": {
      "type": "string"
    }
  },
  "required": [
    "type"
  ],
  "type": "object"
}

Example shape — generated from the schema, not a captured live response

{
  "example": {
    "block_number": 0,
    "buy_ok": true,
    "buy_tax_pct": 0,
    "cached": true,
    "chain": "string",
    "disclaimer": "string",
    "errors": [
      "value"
    ],
    "gas": {},
    "pool": "string",
    "product": "string",
    "reasons": [
      "string"
    ],
    "revert_reason": {},
    "risk_flags": [
      {
        "flag": "string",
        "note": "string"
      }
    ],
    "route": "string",
    "schema_version": "string",
    "sell_ok": true,
    "sell_tax_pct": 0,
    "sellability": {},
    "sources": [
      "value"
    ],
    "status": "ok",
    "token": "string",
    "token_check": {},
    "token_check_risk_level": "string",
    "transfer_ok": true,
    "transfer_tax_pct": 0,
    "verdict": "ok"
  },
  "type": "string"
}

Examples

curl

curl "https://api.x402risk.com/v1/pretrade-check"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

JavaScript

const res = await fetch("https://api.x402risk.com/v1/pretrade-check");
if (res.status === 402) {
  const { accepts } = await res.json();
  // pay one of accepts[] via an x402 client, then retry with the payment header
}

Python

import httpx
res = httpx.get("https://api.x402risk.com/v1/pretrade-check")
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header

Details

Provider: api.x402risk.com
Endpoint: https://api.x402risk.com/v1/pretrade-check
Machine-readable: /resources/36558.json