Single-fact: what does Ethereum mainnet gas cost RIGHT NOW? Returns the latest block’s base fee + blob base fee AND the consensus-computed next-block projection (not a guess — the protocol’s own EIP-1559/4844 arithmetic), straight from eth_feeHistory. Fields: {block, base_fee_gwei, blob_base_fee_gwei, gas_used_ratio, next_base_fee_gwei, next_blob_base_fee_gwei}. Bulk per-block history: /v1/premium/fee-history.csv ($0.05, up to 1024 blocks/call).

Paint pixels on x402-pixel — a shared 1000×1000 collaborative pixel canvas and on-chain ad board for AI agents. POST a batch of { x, y, color } pixels; each claim can carry a title and a link. Pay per pixel in USDC; pixels are permanent once claimed.

Fetch full OFAC SDN entity details by UID: primary name, all known aliases, entity type, sanction programs, remarks.

Scan a website for GDPR compliance — cookie consent, privacy policy, trackers (POST variant)

Audit email deliverability for a domain — checks SPF, DKIM, DMARC, MX records (POST variant)

Find a person's email from their name and company domain (POST variant)

Research keywords with Google autocomplete suggestions, related queries, and intent classification (POST variant)

Fetch full UN Security Council consolidated list entity details by DATAID: primary name, all aliases, entity type, list section.

Check wallet eligibility for crypto airdrops (POST variant)

Get comprehensive domain intelligence (WHOIS + DNS + SSL) (POST variant)

Deterministic scenario stream generator for AI trading agent stress-testing. Simulates chronological event ticks (hype cycle, FUD cascade, etc.) with progressive step values.

Fetch full OFAC SDN entity details by UID: primary name, all known aliases, entity type, sanction programs, remarks.

Single-fact: what did the proposer of the latest block ACTUALLY get paid (priority fees + direct coinbase transfers — the value that reaches the validator, not the noisy block-value proxy)? Returns {block, proposer_payment_eth, builder, tx_count} plus a 1h aggregate {samples, mean_eth, median_eth, p90_eth, max_eth}. Per-block history export: /v1/premium/builder-bids.csv ($0.05, CSV or JSONL).

Confirm a funded crypto off-ramp transfer (USDC to bank). Submit the transfer_id from /transfer and the on-chain tx_hash of your USDC deposit; the fiat bank payout then proceeds. Idempotent. Pay 0.01 USDC.

Look up any legal entity worldwide by its 20-character LEI (Legal Entity Identifier). Returns the GLEIF golden copy record: legal name, jurisdiction, addresses, registration status. Global KYB primitive.

Find the best cross-chain bridge route (POST variant)

Find best DeFi yield opportunities for a token (POST variant)

Get perpetual futures funding rates across exchanges (POST variant)

Company name search across jurisdictions. jurisdiction=lei searches the global GLEIF LEI database (all countries); jurisdiction=jp searches the official Japan National Tax Agency corporate registry. Returns registered legal names, identifiers, and addresses. KYB / counterparty verification primitive.

Get liquidity depth for Solana DEX pools by token mint (POST variant)