Api Endpoint

api.x402node.dev

Check the ERC20 allowance an owner has granted a spender, returns raw and formatted amount with token symbol and decimals on five EVM chains. token allowance, erc20 approval check, spender allowance, approval audit, revoke helper data Accepts payment on Base or Solana — either network works.

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Offering

Provider: api.x402node.dev
Method: GET
Offering type: Api Endpoint
Transport type: http
Category: Blockchain And Crypto
Delivery: Not provided
Pricing model: Not provided
x402 version: 2

Endpoint context

URL: https://api.x402node.dev/chain/token-allowance
MIME type: application/json
First seen: 2026-10-16T01:58:48.885Z
Last seen: 2026-11-02T16:10:07.119Z
Tags: None supplied

Website

Payment pricing

x402 payment terms are the authoritative price for calling this endpoint.

Payment option 1: 0.005 USDC
Atomic price: 5000 · Network: eip155:8453 · Asset: USDC · Scheme: exact
Payment option 2: 0.005 USDC
Atomic price: 5000 · Network: solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp · Asset: USDC · Scheme: exact

Raw x402 terms

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "5000",
    "payTo": "0x4466d4A84b7c49a6A094ec6eef4a0712D6dd125e"
  },
  {
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "amount": "5000",
    "payTo": "9urRvUx69HqAopg1JGV9P9wR7JdKoztzdkuNyJ8Eo1up"
  }
]

Observed health

Status: Healthy
Latest latency: 183 ms
Average latency: 655 ms
HTTP status: 402
Last checked: 2026-11-02T16:10:07.113Z
Reachability: 100% over 10 checks

Latency is measured to the first response headers. A reachable result does not verify response accuracy or merchant identity.

Input schema

{
  "type": "object",
  "properties": {
    "type": {
      "type": "string",
      "const": "http"
    },
    "method": {
      "type": "string",
      "enum": [
        "GET"
      ]
    },
    "queryParams": {
      "type": "object",
      "properties": {
        "token": {
          "type": "string",
          "description": "ERC20 contract (required)"
        },
        "owner": {
          "type": "string",
          "description": "Owner address (required)"
        },
        "spender": {
          "type": "string",
          "description": "Spender address (required)"
        },
        "chain": {
          "type": "string",
          "description": "ethereum, base (default), arbitrum, optimism, polygon"
        }
      },
      "required": [
        "token",
        "owner",
        "spender"
      ]
    }
  },
  "required": [
    "type",
    "method"
  ],
  "additionalProperties": false
}

Output schema

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "type": "object",
  "properties": {
    "input": {
      "type": "object",
      "properties": {
        "type": {
          "type": "string",
          "const": "http"
        },
        "method": {
          "type": "string",
          "enum": [
            "GET"
          ]
        },
        "queryParams": {
          "type": "object",
          "properties": {
            "token": {
              "type": "string",
              "description": "ERC20 contract (required)"
            },
            "owner": {
              "type": "string",
              "description": "Owner address (required)"
            },
            "spender": {
              "type": "string",
              "description": "Spender address (required)"
            },
            "chain": {
              "type": "string",
              "description": "ethereum, base (default), arbitrum, optimism, polygon"
            }
          },
          "required": [
            "token",
            "owner",
            "spender"
          ]
        }
      },
      "required": [
        "type",
        "method"
      ],
      "additionalProperties": false
    }
  },
  "required": [
    "input"
  ]
}