Security · x402 · early usage

Decode an off-chain SIGNATURE REQUEST before you sign it: EIP-712 typed data (eth_signT…

by sign.cyberwarex.com · discovered, not yet claimed by its owner · updated 2026-10-13

30d calls40

30d payers3

MethodGET

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

Decode an off-chain SIGNATURE REQUEST before you sign it: EIP-712 typed data (eth_signTypedData_v4) or a plain personal_sign string. Turns the opaque request into a human-readable summary plus security risk flags for the drainer patterns wallets miss - gasless unlimited token approvals (EIP-2612 Permit, DAI permit, Uniswap Permit2) and asset-transferring marketplace orders (Seaport). Keyless, deterministic, zero network.

Tags: signature · eip712 · permit · permit2 · seaport · bazaar

Call contract

Method: GET
Input: query parameters
Output: json
Last paid call: 2026-10-13

Input example from Bazaar metadata

{
  "typed_data": {
    "domain": {
      "chainId": 1,
      "name": "USD Coin",
      "verifyingContract": "0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48",
      "version": "2"
    },
    "message": {
      "deadline": 9999999999,
      "nonce": 0,
      "owner": "0x0000000000000000000000000000000000000001",
      "spender": "0x1111111254EEB25477B68fb85Ed929f73A960582",
      "value": "115792089237316195423570985008687907853269984665640564039457584007913129639935"
    },
    "primaryType": "Permit"
  }
}

Output example

{
  "disclaimer": "Deterministic, keyless decode of a signature request only. This is not financial advice and not a guarantee: it reads the request you were given, it cannot know the intent of the site that produced it. Never sign a request you do not understand.",
  "domain": {
    "chainId": 1,
    "name": "USD Coin",
    "verifyingContract": "0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48",
    "version": "2"
  },
  "kind": "typed_data",
  "primaryType": "Permit",
  "risk": {
    "flags": [
      {
        "code": "unlimited_token_approval_via_permit",
        "detail": "spender gets an effectively unlimited allowance of USD Coin.",
        "severity": "danger"
      }
    ],
    "level": "danger"
  },
  "summary": "Gasless UNLIMITED token approval (EIP-2612 permit) of USD Coin to spender 0x1111..."
}

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/28393.json for the price and payment options.
Pay. Call GET https://sign.cyberwarex.com/decode. 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: $0.002 / request
Protocol: x402 v2
Auth: No account or API key. Pay per request.
Networks: Base
Demand: 40 calls · 3 unique payers in 30d (public x402 Bazaar data)

x402 payment requirements

Scheme	Network	Asset	Amount	Pay to	Timeout
exact	Base eip155:8453	USDC	$0.002	0x058D0Cc5CC97e61e8A9f38D6d6365bce525921B2	300s

accepts[] (raw JSON)

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0x058D0Cc5CC97e61e8A9f38D6d6365bce525921B2",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "2000",
    "amountUsd": 0.002,
    "maxTimeoutSeconds": 300
  }
]

Schemas

Output schema (JSON Schema)

{
  "properties": {
    "example": {
      "properties": {
        "disclaimer": {
          "type": "string"
        },
        "domain": {
          "description": "EIP-712 domain (name, chainId, verifyingContract).",
          "type": "object"
        },
        "kind": {
          "description": "typed_data or personal_sign.",
          "type": "string"
        },
        "primaryType": {
          "type": "string"
        },
        "risk": {
          "description": "level (none|caution|danger) + flags.",
          "type": "object"
        },
        "summary": {
          "description": "human-readable statement of what signing does.",
          "type": "string"
        }
      },
      "type": "object"
    },
    "type": {
      "type": "string"
    }
  },
  "required": [
    "type"
  ],
  "type": "object"
}

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

{
  "example": {
    "disclaimer": "string",
    "domain": {},
    "kind": "string",
    "primaryType": "string",
    "risk": {},
    "summary": "string"
  },
  "type": "string"
}

Examples

curl

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

JavaScript

const res = await fetch("https://sign.cyberwarex.com/decode");
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://sign.cyberwarex.com/decode")
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: sign.cyberwarex.com
Endpoint: https://sign.cyberwarex.com/decode
Machine-readable: /resources/28393.json