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skills.onesource.io Ethereum Block Header Fetch
x402
skills.onesource.io Ethereum Block Header Fetch is a paid API for AI agents from skills.onesource.io, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-14).
Fetches an Ethereum block header and its transaction hashes by block number, tag, or hex value via eth_getBlockByNumber
Price / call$0.003
Success—
StatusUnknown
How this service works
Fetch an Ethereum block header and transaction hashes by number, tag, or hex via eth_getBlockByNumber
Output
Returns the block header fields (number, hash, parentHash, miner, timestamp, gasUsed, gasLimit, difficulty, etc.) along with a list of transaction hashes included in that block, as returned by eth_getBlockByNumber on the requested network.
Example use cases
Example prompt
“Can you fetch the block header and transaction hashes for Ethereum block number 0x1212D00 on mainnet — I need the timestamp, miner, gas used, and the list of tx hashes in that block.”
Technical details
Endpoint
GEThttps://skills.onesource.io/api/chain/block/0x1212D00When to prefer
Use this endpoint when you need block-level metadata (header fields, transaction list) for a specific block on Ethereum or supported EVM chains (Base, Avalanche, Sepolia, MegaETH). Prefer this over transaction-level endpoints when you need block context rather than individual transaction details, and over full-block endpoints when you only need the header and tx hashes rather than full transaction objects.
Side effects
- Block number out of range or future block — returns null or error
- Invalid hex format for block number — schema validation error
- Unsupported network value — enum validation failure
- Block tag 'pending' may return null on networks without a mempool
- RPC timeout or upstream node error — 5xx or gateway timeout
Input
{
"number": "latest",
"network": "ethereum"
}Schema · Request body
| Field | Type | Description |
|---|---|---|
| number | — | |
| network | string |
Output
{
"_truncated": true,
"_originalSize": 11918
}Schema · Response
| Field | Type | Description |
|---|---|---|
| _truncatedrequired | boolean | |
| _originalSizerequired | number |
Tags
x402
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