Base Block Header Info

Machine-to-Machine Conformance API · block-info

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Latest (or specified) Base block header: number, timestamp, transaction count, base fee. Preflighted before payment.

Honest Scope Guarantee

Reads public Base chain state via RPC, preflighted so you never pay during an outage. It proves what is on-chain — not who controls a key or what happens off-chain.

Run in Playground (Free) Buy Card Credits Agent Quickstart

Quickstart & Execution

cURL (20 Free Calls/Day • Zero Authentication Required)

curl -X POST https://api.code402.dev/v1/tools/block-info/call \
  -H "content-type: application/json" \
  -d '{"block":"latest"}'

No API key needed for the free daily tier. When daily quota exhausts, the endpoint replies with HTTP 402 Payment Required specifying the exact USDC amount. Machines sign an EIP-3009 transfer on Base L2; human engineers buy card credits. Every paid execution returns a cryptographically signed XDR-1 receipt for zero-knowledge audit trails.

Input Parameters

Field	Type	Meaning & Constraints
`block`	`string`	Block number as hex (0x…) or decimal, or a tag (latest/earliest/pending/finalized/safe); defaults to latest.

Response Format

Deterministic JSON payload fields: tool, valid, block, block_number, timestamp, timestamp_iso, tx_count, base_fee_gwei, reason, retryable, scope. Paid responses also carry an offline-verifiable receipt object (XDR-1, secp256k1 signature recoverable to the authorized signer).

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