# TripGuard Fare Intelligence – ETH Balance Lookup

> TripGuard Fare Intelligence – ETH Balance Lookup is a paid API for AI agents from tripguard-fare-intel.onrender.com, paid per call via x402, $0.12/call, status unknown (last checked 2026-10-11).

Returns the ETH balance (in wei and ether) for a given Ethereum wallet address on the Base network

## Facts

- Endpoint: POST https://tripguard-fare-intel.onrender.com/chain/eth-balance?utm_source=zero.xyz
- Price: $0.12/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-11
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/tripguard-fare-intelligence-eth-balance-lookup-4a87d339
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap__iHPM-_5M6cgAKijucgQj

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 tripguard-fare-intelligence-eth-balance-lookup-4a87d339 -d '<json body>'
```

Example prompt: Can you check the ETH balance for wallet address 0x9Cc774A8eD49d89cBA1A288F4a050B8F7FbA77EE and tell me how much ether it holds?

## When to prefer this

Use this endpoint when you need a quick, pay-per-call ETH balance lookup for any Ethereum wallet address without setting up your own RPC node or managing API keys. It is best suited for lightweight, single-address spot checks rather than bulk or historical balance queries.

## Known failure modes

- Invalid or malformed Ethereum address returns an error or zero balance
- Network connectivity issues with the Base RPC endpoint may cause timeouts
- Non-checksummed addresses may fail validation
- Payment in USDC not fulfilled triggers a 402 response before any balance data is returned

## How this service works

Real-time airfare intelligence for AI travel-booking agents: flight price-drop prediction, fare-fraud and deal-legitimacy verification, and verified booking links for any route and date. Pay-per-call in USDC on Base. No API key.

## Output

A JSON object containing the wallet address queried, its ETH balance expressed in wei (as a string), and its ETH balance expressed in ether (as a decimal string), e.g. {"wei":"0","ether":"0.0","address":"0x9Cc774..."}

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "address": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "wei": "0",
  "ether": "0.0",
  "address": "0x9Cc774A8eD49d89cBA1A288F4a050B8F7FbA77EE"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/tripguard-fare-intelligence-eth-balance-lookup-4a87d339/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from tripguard-fare-intel.onrender.com](https://www.zero.xyz/host/tripguard-fare-intel.onrender.com/llms.txt)