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Documentation Index

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The Alchemy Agentic Gateway skill gives your agent access to Alchemy’s enhanced blockchain APIs at https://x402.alchemy.com — token balances, NFT metadata, portfolio data, token prices, and decoded transaction history — authenticated via Sign-In With Ethereum (SIWE) and paid per call via x402.

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Install

Terminal
npx @alchemy/x402 wallet generate
Then follow the skill setup to sign a SIWE auth token. The full setup guide is in the skill reference below.

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What the skill covers

DataDescription
Token balancesERC-20 balances for any address on Base
NFT metadataToken attributes, images, and ownership
Portfolio dataMulti-chain token holdings with metadata
Token pricesCurrent prices by symbol
Transaction historyDecoded asset transfers

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Example prompts

Check the token balances at 0xYourAddress on Base

Get the portfolio for 0xYourAddress across all chains

What's the current price of ETH and USDC?

Show me the NFTs owned by 0xYourAddress

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Reference