Api Endpoint

Agent Chain Data: ERC-20 Token Balance & Allowance

Pre-flight check before a swap or transfer: ERC-20 allowance, balance, decimals and symbol in one call, read live from the chain at the latest block. Pass an amount and get a straight would_succeed verdict with the blocking reason and the action needed. Base, Ethereum, Arbitrum, Optimism, Polygon. A missing approval burns the gas of a failed transaction - this call costs a fraction of that.

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Offering

Provider: api.eucompliance.tools
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.eucompliance.tools/x402/token
MIME type: application/json
First seen: 2026-10-16T01:52:13.818Z
Last seen: 2026-11-02T17:42:20.229Z
Tags: token-balance, erc20-balance, ERC20, allowance, Wallet, DeFi, EVM, Onchain, agent-chain-data

Website

Payment pricing

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

Payment option 1: 0.002 USDC
Atomic price: 2000 · Network: eip155:8453 · Asset: USDC · Scheme: exact
Payment option 2: 0.002 USDC
Atomic price: 2000 · Network: eip155:42161 · Asset: USDC · Scheme: exact
Payment option 3: 0.002 USDC
Atomic price: 2000 · Network: eip155:137 · Asset: USDC · Scheme: exact
Payment option 4: 0.002 USDC
Atomic price: 2000 · Network: solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp · Asset: USDC · Scheme: exact

Raw x402 terms

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "2000",
    "payTo": "0x478bCdeA94b9CB5EA14C33e6f0d7E920743d39f2"
  },
  {
    "scheme": "exact",
    "network": "eip155:42161",
    "asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
    "amount": "2000",
    "payTo": "0x478bCdeA94b9CB5EA14C33e6f0d7E920743d39f2"
  },
  {
    "scheme": "exact",
    "network": "eip155:137",
    "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
    "amount": "2000",
    "payTo": "0x478bCdeA94b9CB5EA14C33e6f0d7E920743d39f2"
  },
  {
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "amount": "2000",
    "payTo": "9N5TAHbtp9s8Ksrcn4b9Kig4uTRnevZC13bSsMnMAQ4c"
  }
]

Observed health

Status: Healthy
Latest latency: 411 ms
Average latency: 1199 ms
HTTP status: 402
Last checked: 2026-11-02T17:42:20.216Z
Reachability: 100% over 14 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",
        "HEAD",
        "DELETE"
      ]
    },
    "queryParams": {
      "type": "object",
      "properties": {
        "chain": {
          "type": "string",
          "enum": [
            "base",
            "ethereum",
            "arbitrum",
            "optimism",
            "polygon"
          ]
        },
        "token": {
          "type": "string",
          "description": "ERC-20 contract address"
        },
        "owner": {
          "type": "string",
          "description": "wallet holding the tokens"
        },
        "spender": {
          "type": "string",
          "description": "contract that would spend them, optional"
        },
        "amount": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "number"
            }
          ],
          "description": "Exact decimal string preferred; JSON number remains accepted for backwards compatibility. Optional; returns a would_succeed verdict."
        }
      },
      "required": [
        "token",
        "owner"
      ]
    }
  },
  "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",
            "HEAD",
            "DELETE"
          ]
        },
        "queryParams": {
          "type": "object",
          "properties": {
            "chain": {
              "type": "string",
              "enum": [
                "base",
                "ethereum",
                "arbitrum",
                "optimism",
                "polygon"
              ]
            },
            "token": {
              "type": "string",
              "description": "ERC-20 contract address"
            },
            "owner": {
              "type": "string",
              "description": "wallet holding the tokens"
            },
            "spender": {
              "type": "string",
              "description": "contract that would spend them, optional"
            },
            "amount": {
              "anyOf": [
                {
                  "type": "string"
                },
                {
                  "type": "number"
                }
              ],
              "description": "Exact decimal string preferred; JSON number remains accepted for backwards compatibility. Optional; returns a would_succeed verdict."
            }
          },
          "required": [
            "token",
            "owner"
          ]
        }
      },
      "required": [
        "type",
        "method"
      ],
      "additionalProperties": false
    }
  },
  "required": [
    "input"
  ]
}