Blockchain And Crypto x402 offerings

Snapshot of every market on ONE builder-deployed perp dex (HIP-3): mark and oracle price, 24h change, hourly funding (plus 8h and annualized), open interest in units and USD, 24h notional volume, imp…

Spot quote for swapping through a Uniswap V3 pool at the current tick. amountIn is in human units (not wei). zeroForOne=true sends token0 → token1; false sends token1 → token0. Returns amountOut net …

Share your namespace with another wallet so different agents can coordinate through it. Grant read or readwrite access to a grantee wallet, optionally with a TTL. This is the cross-agent sharing a si…

Fetch the verified Solidity source files and compiler metadata for a contract address from an open verified-contract repository. Covers 8 EVM mainnets (ethereum, base, polygon, arbitrum, optimism, bs…

Dry-run a prospective smart-contract call or transaction without broadcasting it: executes eth_call and eth_estimateGas against the latest block over the same keyless multi-endpoint public RPC pool a…

Tell this server whether a call you paid for delivered what it promised. Bound to the receipt: give it the settlement transaction from that call's PAYMENT-RESPONSE (or Payment-Receipt) header and a v…

Get the current floor price for an NFT collection across OpenSea + LooksRare (Ethereum). Returns per-marketplace floor (ETH), collection URL, retrieval timestamp, and the cheapest cross-marketplace f…

Read on-chain state of a Uniswap V3 pool: token0/token1 addresses + decimals, fee tier, current sqrtPriceX96, tick, in-range liquidity, and the decoded human-readable spot price (token1 per token0). …

Build the EIP-3009 transferWithAuthorization typed data for a gasless USDC transfer on Base/Polygon/Arbitrum/Optimism/Ethereum/Monad/Celo/Avalanche/Sei - the exact EIP-712 object an agent signs with …

Historical USD price series for a token, by ticker symbol (ETH, BTC, SOL, ...) or by ERC-20 contract + network, at 5-minute (up to 2 days), hourly (up to 30 days) or daily (up to 365 days) resolution…

Find Solana tokens and pairs by name, ticker or address across every DEX a public pair index covers, filtered to Solana only, in the index's relevance order: base and quote token, mint addresses, DEX…

Look up the Uniswap V3 pool address for a token pair + fee tier on Ethereum, Base, Polygon, Arbitrum, or Optimism. Pass either order (tokenA/tokenB) - the factory sorts internally. Returns 0x0…0 if n…

DeFi protocols ranked by total value locked, filterable by category, chain or name, each with rank, chains, TVL, 1h, 1d and 7d change, market cap and the market cap to TVL ratio. Use it when an agent…

Everything Agent402 knows about one x402 seller origin, in one read: identity and crawl history, the catalog with the provenance of every price (live-402 or manifest, when it was read, whether it is …

Buy one call from an x402 seller endpoint right now and report exactly what happened: the unpaid call's status, the 402 decoded (accepts, chains, payTo, asset, price), whether the accept's EIP-712 do…

Fetch the verified ABI for a contract address from an open verified-contract repository, plus a ready-to-use list of human-readable function signatures with their 4-byte selectors. Covers 8 EVM mainn…

Builder market share aggregated over the last N MEV-Boost blocks from a major MEV-Boost relay's public data API. Returns per-builder block count, share percent, total ETH paid to proposers, and avera…

What Solana tokens are being pushed right now: a public DEX pair index's top boosted tokens (paid promotion, ranked by boost amount - a signal of marketing spend, not quality) and the latest token pr…

Full receipt for a transaction hash in one call: status, block, from/to, value, gas used vs limit, effective gas price, total fee, tx type, calldata selector, contract created, plus every ERC-20 / ER…

Every listed perpetual futures market in one call: mark, oracle and mid price, 24-hour change, funding (hourly, 8-hour, annualized), open interest in coins and dollars, 24-hour notional volume and ma…

Token and native transfer history for any EVM address across major chains: direction, counterparty, asset, exact decimal value, block and transaction hash, filterable by category and block range with…

Resolve the metadata for a single NFT: title, description, image URLs (original + cached CDN), attributes/traits, and the standard (ERC-721 vs ERC-1155). Useful when you have a contract+tokenId and n…

Read-only JSON-RPC against Ethereum, Base, Polygon, Arbitrum, or Optimism with built-in multi-endpoint failover - one paid call, no node or API key of your own. Prefer the named reads (block-number, …

Stablecoins ranked by circulating supply: peg currency and mechanism, price and deviation from peg, supply in peg units and USD, 1d, 7d and 30d change and circulation per chain. Use it when an agent …