SERVICE / DETAILother

ERC-20 Allowance

GET store.agentexchange.work/chain/allowance

OPEN SERVICE ↗
SONAR SCORE0.644
LIVE PRICE0.090000
BAZAAR LIVEcompatible
CDP INDEXEDno
DECISION EVIDENCE

Why an agent can trust this route.

17 observations in the last 24h
HANDSHAKE SUCCESS100.0%402 challenge reachable
PAID DELIVERY0.0%settlement observed
P90 LATENCY3532msrecent response window
PRICE DRIFT0.0%advertised vs observed

Sonar evidence is advisory. Paid delivery is shown as verified only when paid probes are available; otherwise route estimates use the unpaid handshake as a clearly labeled proxy.

SONAR PROBE HISTORY / 30D

Observed outcomes

JSON ↗
LIVE ENDPOINT METADATA

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.

Resource: store.agentexchange.work/chain/allowance

Network: eip155:8453, solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp · Asset: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 · Pay to: 0xc91cE6291eDC0713ec753BAFBA002506ffb2b95c

Payment methods: — · Last validation: 2026-09-14 16:42:33.094+00

{
  "input": {
    "type": "object",
    "required": [
      "type",
      "method"
    ],
    "properties": {
      "type": {
        "type": "string",
        "const": "http"
      },
      "method": {
        "enum": [
          "GET"
        ],
        "type": "string"
      },
      "queryParams": {
        "type": "object",
        "required": [
          "token",
          "owner",
          "spender"
        ],
        "properties": {
          "chain": {
            "type": "string",
            "description": "base|ethereum|optimism|arbitrum|polygon|gnosis (default base)"
          },
          "owner": {
            "type": "string",
            "description": "Token owner wallet (0x...)"
          },
          "token": {
            "type": "string",
            "description": "ERC-20 token contract (0x...)"
          },
          "spender": {
            "type": "string",
            "description": "Approved spender address (0x...)"
          }
        }
      }
    },
    "additionalProperties": false
  },
  "output": {
    "type": "object",
    "required": [
      "type"
    ],
    "properties": {
      "type": {
        "type": "string"
      },
      "example": {
        "type": "object",
        "properties": {
          "allowance": {
            "type": "number"
          },
          "raw_allowance": {
            "type": "string"
          }
        }
      }
    }
  },
  "paymentRequirements": [
    {
      "raw": {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0xc91cE6291eDC0713ec753BAFBA002506ffb2b95c",
        "amount": "90000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      },
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "payTo": "0xc91cE6291eDC0713ec753BAFBA002506ffb2b95c",
      "scheme": "exact",
      "network": "eip155:8453",
      "amountAtomic": "90000"
    },
    {
      "raw": {
        "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "extra": {
          "feePayer": "D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM"
        },
        "payTo": "2147pBT4LxoszjvLeGRxyVzpRnMi986VH3FAoprSs8Ez",
        "amount": "90000",
        "scheme": "exact",
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "maxTimeoutSeconds": 300
      },
      "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
      "payTo": "2147pBT4LxoszjvLeGRxyVzpRnMi986VH3FAoprSs8Ez",
      "scheme": "exact",
      "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
      "amountAtomic": "90000"
    }
  ]
}
METADATA PROVENANCE

Source catalog records are retained separately from live endpoint observations. Sonar score, uptime, and latency are advisory metrics. CDP indexing is not inferred from validation.