Api Endpoint

Riley Craig x402 Agent Store

How much of an ERC-20 token a spender is approved to move from an owner's wallet, via allowance, across Base, Ethereum, Optimism, Arbitrum, Polygon, Gnosis. The approval read every DeFi, swap and trading agent makes before (and after) a transaction to know if an approve is needed. Live public RPC; one paid call.

Open interactive test console

Offering

Provider: x402-agent-store.rileycraig14.workers.dev
Method: GET
Offering type: Api Endpoint
Transport type: http
Category: Api
Delivery: Not provided
Pricing model: Not provided
x402 version: 2

Endpoint context

URL: https://x402-agent-store.rileycraig14.workers.dev/chain/allowance
MIME type: Not provided
First seen: 2026-10-16T02:54:53.696Z
Last seen: 2026-11-04T09:04:10.296Z
Tags: Onchain, RPC, ERC20, allowance, approval, DeFi, Swap, Trading, Crypto, data-feed, Search, Utility

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": "0xc91cE6291eDC0713ec753BAFBA002506ffb2b95c"
  },
  {
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "amount": "5000",
    "payTo": "2147pBT4LxoszjvLeGRxyVzpRnMi986VH3FAoprSs8Ez"
  }
]

Observed health

Status: Healthy
Latest latency: 1426 ms
Average latency: 1638 ms
HTTP status: 402
Last checked: 2026-11-04T09:04:10.290Z
Reachability: 92.9% 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"
      ]
    },
    "queryParams": {
      "type": "object",
      "required": [
        "token",
        "owner",
        "spender"
      ],
      "properties": {
        "token": {
          "type": "string",
          "description": "ERC-20 token contract (0x...)"
        },
        "owner": {
          "type": "string",
          "description": "Token owner wallet (0x...)"
        },
        "spender": {
          "type": "string",
          "description": "Approved spender address (0x...)"
        },
        "chain": {
          "type": "string",
          "description": "base|ethereum|optimism|arbitrum|polygon|gnosis (default base)"
        }
      }
    }
  },
  "required": [
    "type",
    "method"
  ],
  "additionalProperties": false
}

Output schema

{
  "type": "object",
  "properties": {
    "type": {
      "type": "string"
    },
    "example": {
      "type": "object",
      "properties": {
        "allowance": {
          "type": "number"
        },
        "raw_allowance": {
          "type": "string"
        }
      }
    }
  },
  "required": [
    "type"
  ]
}