TripGuard Fare Intelligence – Chain Nonce

x402

TripGuard Fare Intelligence – Chain Nonce 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 current blockchain nonce for a given wallet address, used to authorize pay-per-call USDC payments on Base for airfare intelligence requests.

Price / call$0.12

Seller volume →—

Success—

StatusUnknown

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

Returns a JSON object containing the block identifier (e.g. 'latest'), the current nonce (integer transaction count), and the queried wallet address. If pending is true, the nonce includes unconfirmed transactions in the mempool.

Example use cases

Pre-payment nonce retrieval

“Get the latest nonce for my wallet 0xAbC123... on Base before I send the USDC payment for the fare lookup — include any pending transactions.”

Replay-attack prevention check

“What's the current transaction count (including pending) for wallet 0x9Cc774A8eD49d89cBA1A288F4a050B8F7FbA77EE so I can make sure my next signed transaction won't be rejected?”

Payment authorization setup

“Retrieve the block and nonce for address 0x1A2B3C... on Base with pending set to true so I can build and sign the authorization payload for my next API call.”

Technical details

Endpoint

POSThttps://tripguard-fare-intel.onrender.com/chain/nonce?utm_source=zero.xyz

When to prefer

Use this endpoint when you need to obtain a wallet nonce on the Base L2 network prior to constructing a signed USDC payment transaction — specifically for authorizing pay-per-call requests to the TripGuard Fare Intelligence API. Not suitable for nonce lookups on Ethereum mainnet or other EVM chains.

Side effects

Invalid or malformed wallet address returns an error response
Network timeout if Base RPC is unreachable
Missing required 'address' field results in a validation error
Nonce may be stale if fetched during high network congestion

Input

Schema · Request body

Field	Type	Description
address	string
pending	boolean

Output

Schema · Response

{
  "type": "json",
  "example": {
    "block": "latest",
    "nonce": 0,
    "address": "0x9Cc774A8eD49d89cBA1A288F4a050B8F7FbA77EE"
  }
}

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