Tool detail

allowance-risk

Checks the ERC20 allowance an owner granted a spender and flags unlimited approvals that could let the spender drain the owner's tokens.

Categories: Security, Onchain data

Use when

check how much of a token a spender is approved to move
flag unlimited ERC20 approvals before a transaction
run a pre-transaction safety check on a token spender

Not for

not a revoke action — read-only risk check, no transactions sent

Inputs

GET query params: token, owner, spender (strings, required); address (string, optional).

Admitted input schema

{
  "type": "object",
  "properties": {
    "address": {
      "type": "string",
      "minLength": 0,
      "maxLength": 4096,
      "description": "EVM/chain address (optional)"
    },
    "owner": {
      "type": "string",
      "minLength": 0,
      "maxLength": 4096,
      "description": "Token owner (required)"
    },
    "spender": {
      "type": "string",
      "minLength": 0,
      "maxLength": 4096,
      "description": "Spender contract (required)"
    },
    "token": {
      "type": "string",
      "minLength": 0,
      "maxLength": 4096,
      "description": "ERC20 contract (required)"
    }
  },
  "required": [
    "token",
    "owner",
    "spender"
  ],
  "additionalProperties": false
}

Endpoint

Method: GET
URL: https://api.x402node.dev/chain/allowance-risk

Payment

Protocol: x402
Listed price: 0.005 USDC per call on Base; Solana also accepted per listing.
Payment method: exact
Network: eip155:8453
Asset: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

Listed terms are catalog metadata. The caller supplies inputs and calls the tool outside Onelayer. If payment is required, the caller uses a compatible wallet to pay.

Source

Directory: Coinbase x402 Bazaar
Record: GET https://api.x402node.dev/chain/allowance-risk
Retrieved: 2026-09-30T20:37:07.382Z
Catalog file SHA-256: 6837ccddf886f0007cf3727ea9d27faaa5047b51b4f425345c554ce1c271a524
Catalog built: 2026-09-30T22:31:58.034Z