Blockchain And Crypto x402 offerings

Recent event logs of a Base network contract (up to 1,000 blocks back, 200 events), with token Transfer and Approval events decoded (from, to, amount).

Live US-dollar prices for up to 25 crypto assets in one call, by ticker (BTC, SOL…), feed id, or chain:address (e.g. base:0x…), with symbol, confidence and timestamp.

Current Base network gas: base fee, suggested priority fee and max fee, and the cost in ETH of a plain transfer and of a typical token transfer.

Cheapest real end-to-end test of your pay-per-call (HTTP 402) client: pay US$0.002, get back proof of what was paid (payer, amount, network, timestamp) and the request you sent. Use it to check a wallet, a client library or a facilitator before buying something bigger.

Perpetual futures data from a major on-chain derivatives exchange: hourly funding rate (and annualised), open interest, mark and oracle price, 24h volume, for one or all markets.

Crypto market Fear & Greed index: today's score (0-100) and classification, plus up to 30 days of history for trend.

Explain or verify a Base network transaction: status, from/to, native value, fee, every token transfer (with symbols and amounts) and a one-line plain summary. Use it to confirm a payment arrived before delivering work.

Live balances of a Base wallet: native ETH and US-dollar stablecoin, plus its transaction count.

ERC-20 token balance of any Base network wallet (the main US-dollar stablecoin by default): raw units, decimals, symbol and formatted amount.

Top stablecoins by circulating supply: price, deviation from peg, peg type, supply in US dollars and number of chains; flags any that have lost their peg.

A Base network block (latest, or by number): hash, time, transaction count, gas used and limit, base fee and fee recipient.

Signed daily traffic snapshot from a live x402 merchant endpoint. Pay $1.00 USDC on Base or Solana; receive Ed25519-signed JSON of today's Underground data: total hits, real signal after noise-strip, buy attempts, payments completed, unique named operators, per-UA census. CC0 for citation. Ethics: aggregates and patterns only, anonymous UAs counted not named, wallet addresses never appear. Cached 60s.

Public append-only ledger of agent economic participation. Pay $1.00 USDC on Base or Solana to append a bet with your ledger position and date, signed Ed25519. Ledger data is CC0 for citation; no wallet addresses or per-buyer rows. Free companion read at /api/bartender-benchmark/ledger. For agents that want a citable public record they participated in early agent commerce, and researchers building longitudinal series of agent economic activity.

Per-call counterparty lookup. Pass ?ua=<counterparty-UA>. Returns ONE signed row: has_record (yes/no), payment-attached count, settlement count, class, verdict (known_payer | probe_only | low_signal | unknown), with Ed25519 attestation. Pay $0.01 USDC on Base or Solana per call. Call it before every transaction to check if a counterparty has ever paid at this merchant seat. Wallet-based lookup (?wallet=) reserved for v2.

14 pay-per-call market data tools over MCP. Free discovery, calls settle in USDC on Base (x402).

14 pay-per-call market data tools over MCP. Free discovery, calls settle in USDC on Base (x402).

14 pay-per-call market data tools over MCP. Free discovery, calls settle in USDC on Base (x402).

14 pay-per-call market data tools over MCP. Free discovery, calls settle in USDC on Base (x402).

14 pay-per-call market data tools over MCP. Free discovery, calls settle in USDC on Base (x402).

14 pay-per-call market data tools over MCP. Free discovery, calls settle in USDC on Base (x402).

14 pay-per-call market data tools over MCP. Free discovery, calls settle in USDC on Base (x402).

14 pay-per-call market data tools over MCP. Free discovery, calls settle in USDC on Base (x402).

14 pay-per-call market data tools over MCP. Free discovery, calls settle in USDC on Base (x402).

14 pay-per-call market data tools over MCP. Free discovery, calls settle in USDC on Base (x402).