Alchemy

What it does

When your agent uses it

• An agent needs to query blockchain data (balances
• Transfer history
• Transaction simulation
• Gas estimates) across Ethereum

Example prompts

• “/alchemy”

Requirements

• Node.js
• A credential in ALCHEMY_API_KEY
• A credential in ALCHEMY_NOTIFY_AUTH_TOKEN
• Compatibility (from SKILL.md): Requires network access. API key path needs $ALCHEMY_API_KEY. x402/MPP paths need Node.js and a wallet funded with USDC. Works across Claude.ai, Claude Code, and API.

Workflow steps

2 steps, taken from the first numbered list in SKILL.md.

1. 1Is ALCHEMY_API_KEY set? → Use the API Key path. Skip to API Key Access.
2. 2No API key? → Ask the user which payment protocol they prefer

What it can do on your machine

Read from SKILL.md and the folder at commit dc47eed. It shows what the files ask for, not the result of running them.

• Tool permissions

  Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

  From allowed-tools in the SKILL.md frontmatter.

• Runs code

  Shell commands in SKILL.md call:

  • curl
  • npx

  From the folder's file list and the shell code blocks in SKILL.md.

• Network

  Hosts in commands or code, which the agent is likely to contact:

  • dashboard.alchemy.com
  • eth-mainnet.g.alchemy.com
  • api.g.alchemy.com
  • solana-mainnet.g.alchemy.com
  • x402.alchemy.com
  • mpp.alchemy.com
  • base-mainnet.g.alchemy.com
  • arb-mainnet.g.alchemy.com
  • bnb-mainnet.g.alchemy.com

  Also links to:

  • alchemy.com
  • github.com

  From URLs in SKILL.md, links to its own repository left out.

• Credentials

  Names these keys or tokens, usually read from environment variables:

  • ALCHEMY_API_KEY
  • ALCHEMY_NOTIFY_AUTH_TOKEN

  From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

• Compatibility

  Requires network access. API key path needs $ALCHEMY_API_KEY. x402/MPP paths need Node.js and a wallet funded with USDC. Works across Claude.ai, Claude Code, and API.

  From compatibility in the SKILL.md frontmatter.

Context cost

Alchemy loads about 3.5k tokens when it runs, and up to ~74k if it reads all its reference files. Until then it costs about 141 tokens; SKILL.md has 1,110 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it

~141

When it runs · the whole SKILL.md, loaded when a task matches

~3.5k

With references · SKILL.md plus every file in references/, read only if the agent opens them

~74k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from BankrBot/skills at commit dc47eed, republished under its MIT licence (© BankrBot). 1,110 words, ~3,504 tokens.

name

alchemy

description

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.

compatibility

Requires network access. API key path needs $ALCHEMY_API_KEY. x402/MPP paths need Node.js and a wallet funded with USDC. Works across Claude.ai, Claude Code, and API.

license

MIT

metadata.author

alchemyplatform

metadata.version

2.0

curl -s https://eth-mainnet.g.alchemy.com/v2/$ALCHEMY_API_KEY \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","id":1,"method":"eth_blockNumber","params":[]}'

curl -s https://eth-mainnet.g.alchemy.com/v2/$ALCHEMY_API_KEY \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","id":1,"method":"alchemy_getTokenBalances","params":["0x00000000219ab540356cbb839cbe05303d7705fa"]}'

curl -s https://eth-mainnet.g.alchemy.com/v2/$ALCHEMY_API_KEY \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","id":1,"method":"alchemy_getAssetTransfers","params":[{"fromBlock":"0x0","toBlock":"latest","toAddress":"0x00000000219ab540356cbb839cbe05303d7705fa","category":["erc20"],"withMetadata":true,"maxCount":"0x3e8"}]}'

curl -s "https://eth-mainnet.g.alchemy.com/nft/v3/$ALCHEMY_API_KEY/getNFTsForOwner?owner=0x00000000219ab540356cbb839cbe05303d7705fa"

curl -s "https://api.g.alchemy.com/prices/v1/$ALCHEMY_API_KEY/tokens/by-symbol?symbols=ETH&symbols=USDC"

curl -s -X POST "https://api.g.alchemy.com/prices/v1/$ALCHEMY_API_KEY/tokens/historical" \
  -H "Content-Type: application/json" \
  -d '{"symbol":"ETH","startTime":"2024-01-01T00:00:00Z","endTime":"2024-01-02T00:00:00Z"}'

curl -s -X POST "https://dashboard.alchemy.com/api/create-webhook" \
  -H "Content-Type: application/json" \
  -H "X-Alchemy-Token: $ALCHEMY_NOTIFY_AUTH_TOKEN" \
  -d '{"network":"ETH_MAINNET","webhook_type":"ADDRESS_ACTIVITY","webhook_url":"https://example.com/webhook","addresses":["0x00000000219ab540356cbb839cbe05303d7705fa"]}'

import crypto from "crypto";

export function verify(rawBody: string, signature: string, secret: string) {
  const hmac = crypto.createHmac("sha256", secret).update(rawBody).digest("hex");
  return crypto.timingSafeEqual(Buffer.from(hmac), Buffer.from(signature));
}

© BankrBot, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 80 other files (references) in alchemy of BankrBot/skills.

• SKILL.md
• alchemy.svg
• catalog.json
• references/data-nft-api.md
• references/data-overview.md
• references/data-portfolio-apis.md
• references/data-prices-api.md
• references/data-simulation-api.md
• references/data-token-api.md
• references/data-transfers-api.md
• references/mpp/authentication.md
• references/mpp/curl-workflow.md
• references/mpp/making-requests.md
• references/mpp/overview.md
• references/mpp/payment.md
• references/mpp/reference.md
• references/mpp/wallet-bootstrap.md
• references/node-debug-api.md
• references/node-enhanced-apis.md
• … and 62 more

Open the folder on GitHubat commit dc47eed