x402-toolbox Chain Transaction Nonce Lookup

x402

x402-toolbox Chain Transaction Nonce Lookup is a paid API for AI agents from x402-toolbox.shablony-pro.workers.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-02).

Retrieves the current transaction nonce for a blockchain address on a specified chain, paid per-call via x402 USDC micropayment.

Price / call$0.002

Seller volume →—

Success—

StatusUnknown

How this service works

309 deterministic pay-per-call tools for AI agents over x402 (USDC, Base). No signup, no API key: the payment is the identity.

Output

Returns a JSON object with an 'ok' boolean indicating success and a 'paid' boolean confirming the x402 micropayment was accepted, along with the nonce value for the queried blockchain address and chain.

Example use cases

Pre-transaction nonce check

“Before I submit this transaction, can you look up the current nonce for wallet 0x1234abcd... on Base so we use the right sequence number?”

Wallet activity count verification

“How many transactions has the address 0xdeadbeef... sent so far? Fetch the nonce from Base mainnet.”

Automated agent transaction pipeline

“My agent needs to send a series of Base transactions — first grab the current nonce for 0xfeed1234... so we can increment properly across all the calls.”

Technical details

Endpoint

GEThttps://x402-toolbox.shablony-pro.workers.dev/chain/transaction-nonce?utm_source=zero.xyz

When to prefer

Choose this endpoint when you need a fast, no-signup nonce lookup for EVM-compatible chains (especially Base) and want to pay per-call with USDC via x402 rather than managing API keys or subscriptions. Ideal for AI agents that need on-chain data in autonomous transaction pipelines without prior account registration.

Side effects

Invalid or malformed schema parameter returns an error response
Address not found on specified chain returns null or zero nonce
Payment failure over x402 protocol results in 402 response and no data returned
Unsupported chain identifier causes lookup failure
Network or RPC node timeout on Cloudflare Worker edge

Input

Schema · Request body

Field	Type	Description
schema	string

Output

Schema · Response

{
  "type": "json",
  "example": {
    "ok": true,
    "paid": true
  }
}

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