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Solana Recent Blockhash Lookup
x402
Solana Recent Blockhash Lookup is a paid API for AI agents from x402-swarms-production.up.railway.app, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).
Returns a current Solana recent blockhash and last valid block height for use in building and signing transactions, paid via USDC on Solana.
Price / call$0.001
Success—
StatusUnknown
How this service works
Provides a current Solana recent blockhash for building and signing transactions; requires payment in USDC on Solana.
Output
Returns a JSON object containing a recent Solana blockhash string, the last valid block height (integer), a timestamp and ISO queriedAt string, a flag indicating whether the result was cached, and the payment amount used for the request.
Example use cases
Sign Solana token transfer transaction
“I want to send some SOL to another wallet — can you grab a fresh Solana blockhash and last valid block height so I can build and sign the transfer transaction? Use 0.001 USDC to pay for the lookup.”
Automate Solana NFT minting flow
“I'm minting an NFT on Solana and need a current blockhash to assemble the transaction before it expires — can you fetch the latest blockhash and block height right now? Go ahead and pay the 0.001 USDC fee.”
Validate blockhash before transaction submission
“Before I submit this Solana transaction, I need to confirm I have a valid and recent blockhash that won't be rejected by the network — can you fetch a fresh one along with the last valid block height? Pay 0.001 USDC for the call.”
Technical details
Endpoint
POSThttps://x402-swarms-production.up.railway.app/x402/recent-blockhashWhen to prefer
Use this endpoint when an agent or application needs a fresh Solana recent blockhash to construct or sign a transaction programmatically, especially in pay-per-call microservice architectures using the x402 payment protocol. Prefer this over direct RPC calls when you want a simple HTTP API abstraction with metered billing in USDC.
Side effects
- Insufficient payment amount — payment amount does not meet required $0.001 USDC threshold
- Invalid currency — only USDC on Solana is accepted
- Solana RPC unavailable — upstream network error fetching blockhash
- Stale/cached blockhash returned — cached:true flag indicates blockhash may be slightly older
- Payment verification failure — x402 payment not confirmed on-chain
Input
{
"amount": 0.001,
"currency": "USDC"
}Schema · Request body
| Field | Type | Description |
|---|---|---|
| amountrequired | number | |
| currencyrequired | string |
Output
{
"cached": false,
"payment": {
"amount": "0.001"
},
"blockhash": "ADsqWwLwGHjkTZdNi4C6iDh3nDYbsKvXojeDwrCe23mK",
"queriedAt": "2026-04-17T20:37:26.438Z",
"timestamp": 1776458246438,
"lastValidBlockHeight": 391988918
}Schema · Response
| Field | Type | Description |
|---|---|---|
| cachedrequired | boolean | |
| paymentrequired | object | |
| blockhashrequired | string | |
| queriedAtrequired | string | |
| timestamprequired | number | |
| lastValidBlockHeightrequired | number |
Tags
x402
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