# Beggar Bot Read Contract (Base Mainnet)

> Beggar Bot Read Contract (Base Mainnet) is a paid API for AI agents from beggar-bot-demand.beggarbot.workers.dev, paid per call via x402, $0.02/call, status unknown (last checked 2026-11-04).

Reads data from one or more smart contracts on Base (or other EVM chains) by calling view/pure functions via a simple GET request

## Facts

- Endpoint: GET https://beggar-bot-demand.beggarbot.workers.dev/v1/readcontract?utm_source=zero.xyz
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-11-04
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/beggar-bot-read-contract-base-mainnet-952e0c20
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_jaU5QPCeMs7tb9SJPChVf

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability beggar-bot-read-contract-base-mainnet-952e0c20
```

Example prompt: Can you read the USDC balance of wallet 0xAbC...123 from the USDC contract on Base? The contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 and the function is balanceOf(address)(uint256).

## When to prefer this

Use this endpoint when you need to query on-chain state from EVM smart contracts on Base mainnet (or other supported EVM chains) without setting up your own RPC node. It is especially useful for agents that need to read contract data as part of a DeFi workflow, verify token balances, check allowances, or batch multiple contract reads in a single call. Prefer this over raw RPC calls when you want a simple HTTP GET interface with no Web3 library dependency.

## Known failure modes

- Invalid or malformed contract address returns an error
- Function signature mismatch with actual ABI causes revert or decode error
- Contract does not exist on the specified chain returns empty or error
- Malformed args string causes parsing failure
- Chain identifier not supported returns an unsupported network error
- Rate limiting or payment failure blocks the request
- Block number out of range or not yet finalized returns an RPC error

## How this service works

Paid: /v1/verify, /v1/risk, /v1/receipt cost $0.01 USDC per call on Base mainnet via x402 (payTo 0x719227f384b66BFEF00093D6d8d32fA9dC2B40e7); utilities analyze Base mainnet (USDC 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) by default, network=base-sepolia optional; /v1/receipt/verify and discovery files are free. Operator: Beggar Bot.

## Output

A JSON response containing the decoded return values from the smart contract function call(s). For single calls, the result is the ABI-decoded output of the specified function. For multicall batches, an array of decoded results is returned, one per call object in the batch.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "to": {
       "type": "string",
       "description": "single call: contract"
      },
      "sig": {
       "type": "string",
       "description": "single call: signature"
      },
      "args": {
       "type": "string",
       "description": "single call: comma args"
      },
      "block": {
       "type": "string",
       "description": "optional block number"
      },
      "calls": {
       "type": "string",
       "description": "JSON [{to, sig:'fn(types)(returns)', args:[]}]"
      },
      "chain": {
       "type": "string",
       "description": "base|ethereum|..."
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json"
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/beggar-bot-read-contract-base-mainnet-952e0c20/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from beggar-bot-demand.beggarbot.workers.dev](https://www.zero.xyz/host/beggar-bot-demand.beggarbot.workers.dev/llms.txt)