Base Block Header Info

Machine Tool Interface · block-info

$0.01 / callPaid per call · 0 free tier No signup

Base chain (8453) block header data: block number, timestamp, transaction count and base fee for any block. Result carries a signed receipt.

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 (Paid-only route — unauthenticated calls return HTTP 402 Payment Required)

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

This route is paid-only (0 free calls/day); every unauthenticated request returns an HTTP 402 Payment Required challenge with its payment terms. Machines use USDC on Base; card credits (instant Stripe checkout) are enabled in this deployment. Signed XDR-1 receipts authenticate recorded service claims, not independent settlement, delivery or zero-knowledge proofs.

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).

Related Conformance Tools

aci-trust-lookup dip-file-dispute pod-verify-delivery csp-commitment-create iso20022-validate iso20022-to-x402-intent iban-check lei-check vat-mod97-check company-number-format swift-bic-check aba-routing-check ein-format-check ifsc-check abn-check gstin-check cnpj-check uscc-check japan-corp-check kra-pin-check rfc-check iso4217-currency-check upi-vpa-check pan-format-check uae-trn-check isin-check sedol-check isbn-check ean13-check luhn-check e164-check pre-disbursement-guard vendor-onboarding-pack rent-deposit-guard rental-listing-risk rental-verdict india-supplier-check china-supplier-check japan-supplier-check latam-supplier-check gulf-supplier-check africa-supplier-check settlement-history-check balance-check erc20-balance tx-activity token-contract-risk ofac-sdn-check simulate-spend-sentinel create-ap2-pilot create-b2b-invoice get-b2b-invoice calculate-fx-savings fx-spot-price-oracle quote-3rd-party-insurance bind-insurance-policy list-approved-insurers batch-validate context-distill crypto-ticker instant-json-schema-verifier clean-markdown-scraper