# Beggar Bot /v1/lstrate – LST Rate Lookup (Base Mainnet)

> Beggar Bot /v1/lstrate – LST Rate 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).

Returns liquid staking token (LST) rate data on Base mainnet for one or more tokens, paid via x402 micropayment.

## Facts

- Endpoint: GET https://beggar-bot-demand.beggarbot.workers.dev/v1/lstrate?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-v1-lstrate-lst-rate-lookup-base-mainnet-4fc849b7
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_FaJNh5WFIG9SU_kcRVIHN

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-v1-lstrate-lst-rate-lookup-base-mainnet-4fc849b7
```

Example prompt: What are the current liquid staking token rates on Base mainnet — can you check the LST rates for all tokens right now?

## When to prefer this

Use this endpoint when you need on-chain liquid staking token (LST) rate data on Base mainnet and are willing to pay a $0.02 USDC micropayment per call via the x402 protocol. Prefer it over generic DeFi APIs when you specifically need Base-native LST rates with optional testnet (base-sepolia) support and want a lightweight, per-call metered service rather than a subscription.

## Known failure modes

- Payment not completed via x402 — returns 402 Payment Required if USDC micropayment of $0.02 is not sent
- Invalid token name in comma-separated list — may return empty or error for unrecognized tokens
- Network parameter typo — unsupported network value may return an error or default to Base mainnet
- Rate data unavailable for a token — returns partial results or error if on-chain data is inaccessible
- Cloudflare Worker timeout — may return a 503 or timeout error under load

## 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

Returns a JSON object containing current rate data for one or more liquid staking tokens on Base mainnet (or base-sepolia if specified), including exchange rates or yield metrics per token. The response is structured JSON with per-token rate fields.

## 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": {
      "tokens": {
       "type": "string",
       "description": "comma list (default all)"
      }
     }
    }
   },
   "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-v1-lstrate-lst-rate-lookup-base-mainnet-4fc849b7/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)