# Beggar Bot Paymaster Lookup (Base Mainnet)

> Beggar Bot Paymaster Lookup (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).

Looks up paymaster/account information for specified addresses and chains on Base mainnet via a free discovery endpoint.

## Facts

- Endpoint: GET https://beggar-bot-demand.beggarbot.workers.dev/v1/paymaster?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-paymaster-lookup-base-mainnet-081f000e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ZR37566rtIO_37UQPp8W1

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-paymaster-lookup-base-mainnet-081f000e
```

Example prompt: Can you look up the paymaster info for the address 0x719227f384b66BFEF00093D6d8d32fA9dC2B40e7 on Base mainnet using Beggar Bot?

## When to prefer this

Use this endpoint when you need free, lightweight discovery of paymaster or account metadata on Base mainnet without paying per call. It is the right choice for pre-flight checks before invoking paid Beggar Bot utilities like /v1/verify or /v1/risk, or when you simply need to discover what chains a paymaster address is associated with.

## Known failure modes

- Invalid or malformed 0x address returns an error response
- Unsupported chain identifier in the chains CSV parameter causes a lookup failure
- GET request with missing required fields returns a schema validation error
- Network unavailability on Cloudflare Workers side causes a timeout or 5xx 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 object containing paymaster or account metadata for the specified address and chains, such as supported networks, configuration details, and account status on Base mainnet.

## 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": {
      "chains": {
       "type": "string",
       "description": "csv"
      },
      "address": {
       "type": "string",
       "description": "0x paymaster/account"
      }
     }
    }
   },
   "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-paymaster-lookup-base-mainnet-081f000e/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)