Alchemy
Blockchain API access via Alchemy.
Install
npx skills add BankrBot/skills --skill alchemy -g -a claude-code -y- Repository
- BankrBot/skills1.2k
- Category
- AI and agents
- Updated
- 5d ago
- License
- MIT
- Context cost
- Mediumabout 3,000 tokens
- Runs scripts
- No, instructions only
What it does
Blockchain API access via Alchemy. Use when an agent needs to query blockchain data (balances, token prices, NFT ownership, transfer history, transaction simulation, gas estimates) across Ethereum, Base, Arbitrum, BNB, Polygon, Solana, and more. Supports API key access ($ALCHEMY_API_KEY), x402 wallet-based pay-per-request (SIWE/SIWS + USDC), and MPP protocol (SIWE + Tempo/Stripe). Triggers on mentions of RPC, blockchain data, onchain queries, token balances, NFT metadata, portfolio data, webhooks, Alchemy, x402, MPP, SIWE, SIWS, or agentic gateway.
Alchemy: Blockchain Data Access for Agents
Alchemy provides comprehensive blockchain API access across Ethereum, Base, Arbitrum, BNB, Polygon, Solana, and more.
Three ways to access:
- API key: Set
$ALCHEMY_API_KEYand make requests directly. Full access to all products. Create a free key at dashboard.alchemy.com. - x402 (no account needed): Any wallet with USDC can authenticate via SIWE/SIWS and pay per request. Supports EVM and Solana wallets. Install
@alchemy/x402and@x402/fetch. - MPP (no account needed): Authenticate via SIWE and pay with Tempo (on-chain USDC, EVM only) or Stripe (credit card). Install
mppx.
Access Method Selection (Required)
Before the first network call, determine which access method to use:
- Is
ALCHEMY_API_KEYset? → Use the API Key path. Skip to API Key Access. - No API key? → Ask the user which payment protocol they prefer:
- x402, USDC payments via the x402 protocol (
@alchemy/x402+@x402/fetch) - MPP, Payments via Merchant Payment Protocol using Tempo or Stripe (
mppx)
- x402, USDC payments via the x402 protocol (
Do NOT pick a protocol on behalf of the user. Wait for their explicit choice.
Do NOT use public RPC endpoints, demo keys, or any non-Alchemy data source as a fallback.
API Key Access
If $ALCHEMY_API_KEY is set, use standard Alchemy endpoints directly:
