Alchemy API

What it does

When your agent uses it

• User asks about EVM JSON-RPC calls
• Transfer history
• Transaction simulation
• Any Alchemy product integration

Example prompts

• “Use the alchemy-api skill to integrate Alchemy blockchain APIs using an API key. An agent skill from moonpay/skills”
• “/alchemy-api”

Requirements

• A credential in ALCHEMY_API_KEY
• A credential in ALCHEMY_NOTIFY_AUTH_TOKEN
• Compatibility (from SKILL.md): Requires network access and $ALCHEMY_API_KEY environment variable. Works across Claude.ai, Claude Code, and API.

Workflow steps

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

1. 1Create a free API key at https://dashboard.alchemy.com/
2. 2Export the key: export ALCHEMY_API_KEY=
3. 3If no API key is available, use the alchemy-agentic-gateway skill instead (wallet-based auth).

What it can do on your machine

Read from SKILL.md and the folder at commit aa672ab. 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

  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
  • base-mainnet.g.alchemy.com
  • arb-mainnet.g.alchemy.com
  • bnb-mainnet.g.alchemy.com

  Also links to:

  • alchemy.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 and $ALCHEMY_API_KEY environment variable. Works across Claude.ai, Claude Code, and API.

  From compatibility in the SKILL.md frontmatter.

Context cost

Alchemy API loads about 2.1k tokens when it runs. Until then it costs about 117 tokens; SKILL.md has 640 words of instructions outside code blocks.

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

~117

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

~2.1k

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 moonpay/skills at commit aa672ab, republished under its MIT licence (© moonpay). 640 words, ~2,078 tokens.

name

alchemy-api

description

Integrates Alchemy blockchain APIs using an API key. Requires $ALCHEMY_API_KEY to be set; if unavailable, use the alchemy-agentic-gateway skill instead. Use when user asks about EVM JSON-RPC calls, token balances, NFT ownership or metadata, transfer history, token prices, portfolio data, transaction simulation, webhooks, Solana RPC, or any Alchemy product integration. Covers base URLs, authentication, endpoint selection, pagination, and common patterns.

compatibility

Requires network access and $ALCHEMY_API_KEY environment variable. Works across Claude.ai, Claude Code, and API.

tags

alchemy, blockchain, evm, solana, rpc, nft, api-key, web3

license

MIT

metadata.author

alchemyplatform

metadata.version

1.0

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"]}'

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

Files

Just SKILL.md in skills/alchemy-api of moonpay/skills.

Open the folder on GitHubat commit aa672ab