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BaseBuilder Trading Mempool Pending Transactions
x402
BaseBuilder Trading Mempool Pending Transactions is a paid API for AI agents from bb-trading-gold.vercel.app, paid per call via x402, $0.188704/call, status unknown (last checked 2026-10-23).
Retrieves or queries pending transactions currently in the blockchain mempool
Price / call$0.188704
Success—
StatusUnknown
How this service works
BaseBuilder Trading API hub - 20 paid endpoints
Output
A list of pending transactions currently sitting in the mempool, including transaction hashes, sender/receiver addresses, gas prices, values, and transaction data for trades or transfers not yet confirmed on-chain.
Example use cases
Detect front-running opportunities in mempool
“Check the Base mempool right now and show me any large pending swaps that haven't been confirmed yet — I want to spot any front-running opportunities before the next block gets mined.”
Confirm my transaction is pending
“I just submitted a transaction on Base and I'm not sure if it went through — can you check the mempool to see if my transaction is still pending and hasn't been confirmed yet?”
Monitor mempool congestion for gas timing
“Pull the current mempool activity on Base for me — I want to see how many unconfirmed transactions are queued up and what gas prices people are using so I can time my next trade better.”
Technical details
Endpoint
POSThttps://bb-trading-gold.vercel.app/api/mempool/pending?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need real-time visibility into unconfirmed transactions on the Base network, particularly for trading bots, MEV strategies, front-running detection, or monitoring large pending swaps before block confirmation.
Side effects
- No pending transactions found — empty mempool response
- Payment of 0.188704 USDC not received — 402 Payment Required
- Invalid or malformed request body — 400 Bad Request
- Mempool data temporarily unavailable — 503 Service Unavailable
- Rate limit exceeded — 429 Too Many Requests
- Authentication or payment verification failure
Tags
x402
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