Agent skill

Etherscan

by TermiX-official in TermiX-official/cryptoclaw

Query block explorer APIs (Etherscan, BSCScan, Polygonscan, etc.) for transactions, contracts, and gas data.

MITAuto-check passed

Install Etherscan

skills CLI

$ npx skills add TermiX-official/cryptoclaw --skill etherscan -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI

$ gh skill install TermiX-official/cryptoclaw etherscan --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy

$ git clone --depth 1 https://github.com/TermiX-official/cryptoclaw.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/etherscan .claude/skills/etherscan && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Paste into Claude Code

Install the "etherscan" agent skill from https://github.com/TermiX-official/cryptoclaw/tree/main/skills/etherscan into .claude/skills/etherscan/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "etherscan", then confirm the skill loads.

Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

$skill-installer

$skill-installer install https://github.com/TermiX-official/cryptoclaw/tree/main/skills/etherscan

Type this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.

skills CLI

$ npx skills add TermiX-official/cryptoclaw --skill etherscan -a codex

Project install goes to .agents/skills/; add -g for ~/.codex/skills/.

GitHub CLI

$ gh skill install TermiX-official/cryptoclaw etherscan --agent codex

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/TermiX-official/cryptoclaw.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/etherscan .agents/skills/etherscan && rm -rf skills-src

Use ~/.agents/skills/ instead of .agents/skills for a personal install.

Codex skills documentation · loads skills from .agents/skills/

Paste into Codex

Install the "etherscan" agent skill from https://github.com/TermiX-official/cryptoclaw/tree/main/skills/etherscan into .agents/skills/etherscan/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "etherscan", then confirm the skill loads.

Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add TermiX-official/cryptoclaw --skill etherscan -a cursor

Project install goes to .agents/skills/; add -g for ~/.cursor/skills/.

GitHub CLI

$ gh skill install TermiX-official/cryptoclaw etherscan --agent cursor

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/TermiX-official/cryptoclaw.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/etherscan .cursor/skills/etherscan && rm -rf skills-src

Use ~/.cursor/skills/ instead of .cursor/skills for a personal install.

Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/

Paste into Cursor

Install the "etherscan" agent skill from https://github.com/TermiX-official/cryptoclaw/tree/main/skills/etherscan into .cursor/skills/etherscan/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "etherscan", then confirm the skill loads.

Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

gemini skills install

$ gemini skills install https://github.com/TermiX-official/cryptoclaw.git --path skills/etherscan

--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.

skills CLI

$ npx skills add TermiX-official/cryptoclaw --skill etherscan -a gemini-cli

Project install goes to .agents/skills/; add -g for ~/.gemini/skills/.

GitHub CLI

$ gh skill install TermiX-official/cryptoclaw etherscan --agent gemini-cli

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/TermiX-official/cryptoclaw.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/etherscan .gemini/skills/etherscan && rm -rf skills-src

Use ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.

Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/

Paste into Gemini CLI

Install the "etherscan" agent skill from https://github.com/TermiX-official/cryptoclaw/tree/main/skills/etherscan into .gemini/skills/etherscan/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "etherscan", then confirm the skill loads.

Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

GitHub CLI

$ gh skill install TermiX-official/cryptoclaw etherscan

Installs for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).

skills CLI

$ npx skills add TermiX-official/cryptoclaw --skill etherscan -a github-copilot

Project install goes to .agents/skills/; add -g for ~/.copilot/skills/.

Manual copy

$ git clone --depth 1 https://github.com/TermiX-official/cryptoclaw.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/etherscan .github/skills/etherscan && rm -rf skills-src

Use ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.

GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/

Paste into GitHub Copilot

Install the "etherscan" agent skill from https://github.com/TermiX-official/cryptoclaw/tree/main/skills/etherscan into .github/skills/etherscan/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "etherscan", then confirm the skill loads.

GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add TermiX-official/cryptoclaw --skill etherscan -a opencode

OpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.

GitHub CLI

$ gh skill install TermiX-official/cryptoclaw etherscan --agent opencode

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/TermiX-official/cryptoclaw.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/etherscan .opencode/skills/etherscan && rm -rf skills-src

Use ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.

OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/

Paste into OpenCode

Install the "etherscan" agent skill from https://github.com/TermiX-official/cryptoclaw/tree/main/skills/etherscan into .opencode/skills/etherscan/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "etherscan", then confirm the skill loads.

OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

Facts

Skill name: etherscan
GitHub stars: 100
Token cost: ~958 tokens
SKILL.md length: 316 words
Files: 1
Skills in repo: 34
Repo updated: May 25, 2026
First seen: Oct 7, 2026
Licence: MIT

At a glance

Query block explorer APIs (Etherscan, BSCScan, Polygonscan, etc.) for transactions, contracts, and gas data.

Works in 5 steps: User provides a contract address → Call getabi to fetch the ABI → Parse the ABI to list available… → …
SKILL.md covers Supported Explorers, Modules & Actions, Workflow: Dynamic Contract… and Usage Notes, plus 1 more section
Reaches api.etherscan.io and api.bscscan.com; needs ETHERSCAN_API_KEY and BSCSCAN_API_KEY

What it does

Etherscan is an agent skill from TermiX-official/cryptoclaw. Query block explorer APIs (Etherscan, BSCScan, Polygonscan, etc.) for transactions, contracts, and gas data.

Its SKILL.md is about 960 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It works with Ethereum. The licence is MIT.

Example prompts

“/etherscan”

Requirements

A credential in ETHERSCAN_API_KEY
A credential in BSCSCAN_API_KEY

Workflow steps

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

User provides a contract address
Call getabi to fetch the ABI
Parse the ABI to list available read/write functions
Use read_contract with the ABI and function name to query
Use write_contract for state-changing calls (with user confirmation)

What it can do on your machine

Read from SKILL.md and the folder at commit 9e1c91b. 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
No scripts in the folder and no shell commands in SKILL.md.
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:
- api.etherscan.io
- api.bscscan.com
- api.polygonscan.com
- api.arbiscan.io
- api-optimistic.etherscan.io
- api.basescan.org
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names these keys or tokens, usually read from environment variables:
- ETHERSCAN_API_KEY
- BSCSCAN_API_KEY
- POLYGONSCAN_API_KEY
- ARBISCAN_API_KEY
- OPTIMISM_API_KEY
- BASESCAN_API_KEY
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Etherscan loads about 958 tokens when it runs. Until then it costs about 30 tokens; SKILL.md has 316 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~30
When it runs · the whole SKILL.md, loaded when a task matches: ~958

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

Auto-check passed

The automated check found no risky patterns in SKILL.md.

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 TermiX-official/cryptoclaw at commit 9e1c91b, republished under its MIT licence (© TermiX-official). 316 words, ~958 tokens.

Download SKILL.mdSave it as .claude/skills/etherscan/SKILL.md (or your agent's skills folder).

name: etherscan
description: Query block explorer APIs (Etherscan, BSCScan, Polygonscan, etc.) for transactions, contracts, and gas data.

Multi-chain Explorer API

Query Etherscan-compatible block explorer APIs for transaction history, contract source code, ABIs, and gas data.

Supported Explorers

Chain	Base URL	Env Var (optional override)
Ethereum	`https://api.etherscan.io/api`	`ETHERSCAN_API_KEY`
BSC	`https://api.bscscan.com/api`	`BSCSCAN_API_KEY` or same key
Polygon	`https://api.polygonscan.com/api`	`POLYGONSCAN_API_KEY`
Arbitrum	`https://api.arbiscan.io/api`	`ARBISCAN_API_KEY`
Optimism	`https://api-optimistic.etherscan.io/api`	`OPTIMISM_API_KEY`
Base	`https://api.basescan.org/api`	`BASESCAN_API_KEY`

All explorers accept the apikey parameter. Many share a single Etherscan key, but some chains require separate registration.

Rate limit: 5 calls/second per key.

Modules & Actions

Account — Transaction History

?module=account&action=txlist&address={addr}&startblock=0&endblock=99999999&page=1&offset=20&sort=desc&apikey={key}

Returns normal transactions for an address.

Account — Token Transfers (ERC-20)

?module=account&action=tokentx&address={addr}&page=1&offset=20&sort=desc&apikey={key}

Filter by contract: add &contractaddress={token}

Account — ERC-721 Transfers

?module=account&action=tokennfttx&address={addr}&page=1&offset=20&sort=desc&apikey={key}

Account — Balance

?module=account&action=balance&address={addr}&tag=latest&apikey={key}

Returns balance in wei. Divide by 1e18 for ETH/BNB.

Contract — Get ABI

?module=contract&action=getabi&address={addr}&apikey={key}

Returns the contract ABI as a JSON string. Tip: Parse the result and pass it to read_contract or write_contract for dynamic contract interaction.

Contract — Get Source Code

?module=contract&action=getsourcecode&address={addr}&apikey={key}

Returns source code, compiler version, constructor arguments, and proxy implementation address if applicable.

Gas Tracker (Ethereum only)

?module=gastracker&action=gasoracle&apikey={key}

Returns SafeGasPrice, ProposeGasPrice, FastGasPrice in gwei.

Workflow: Dynamic Contract Interaction

User provides a contract address
Call getabi to fetch the ABI
Parse the ABI to list available read/write functions
Use read_contract with the ABI and function name to query
Use write_contract for state-changing calls (with user confirmation)

This enables interacting with ANY verified contract without pre-built tools.

Usage Notes

Always include &apikey={key} — requests without it are heavily rate-limited
Use offset and page for pagination; don't fetch more than needed
The getabi endpoint only works for verified contracts
For proxy contracts, getsourcecode includes the implementation address — fetch that ABI too
Cross-reference contract data with security-check skill for risk assessment

Example Queries

User: "Show my recent transactions on BSC" → Call BSCScan txlist for active wallet, present last 10 with value and status

User: "Get the ABI for this contract: 0x..." → Call getabi, parse result, summarize available functions

User: "What's the current gas price on Ethereum?" → Call gasoracle, present safe/standard/fast prices

Files

Just SKILL.md in skills/etherscan of TermiX-official/cryptoclaw.

Open the folder on GitHubat commit 9e1c91b

Compare with similar skills

Etherscan next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Etherscan compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
Etherscan this skillTermiX-official/cryptoclaw	100	—	~958	Automated safety check: Pass	MIT	4 mo ago
Wagmi Feature Developmentwevm/wagmi	6.8k	—	~3.8k	Automated safety check: Pass	MIT	5 days ago
Release Roundethereumjs/ethereumjs-monorepo	2.8k	—	~2k	Automated safety check: Pass	None	19 days ago
NEAR Intents Swap Integrationinternet-court/internet-court-skill	6.4k	2 repos	~939	Automated safety check: Pass	Custom licence	1 mo ago
Update Est Fixturesethereumjs/ethereumjs-monorepo	2.8k	—	~3.3k	Automated safety check: Pass	None	19 days ago
Swapper Depositswapperfinance/swapper-toolkit	852	—	~1.8k	Automated safety check: Pass	MIT	6 mo ago

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Questions about Etherscan

What does Etherscan do?

Query block explorer APIs (Etherscan, BSCScan, Polygonscan, etc.) for transactions, contracts, and gas data. Etherscan is an agent skill from TermiX-official/cryptoclaw.) for transactions, contracts, and gas data.

How do I install Etherscan in Claude Code?

Run `npx skills add TermiX-official/cryptoclaw --skill etherscan -a claude-code`. Or copy the skill folder (skills/etherscan in TermiX-official/cryptoclaw) into .claude/skills/etherscan in your project. Claude Code loads it when a task matches its description.

How do I install Etherscan in Codex?

Run `npx skills add TermiX-official/cryptoclaw --skill etherscan -a codex`. Or copy the skill folder (skills/etherscan in TermiX-official/cryptoclaw) into .agents/skills/etherscan in your project. Codex loads it when a task matches its description.

Can I use Etherscan in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add TermiX-official/cryptoclaw --skill etherscan -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/etherscan, .gemini/skills/etherscan, .github/skills/etherscan and .opencode/skills/etherscan in your project.

What does Etherscan need to run?

Going by SKILL.md and its folder, Etherscan needs credentials named ETHERSCAN_API_KEY, BSCSCAN_API_KEY, POLYGONSCAN_API_KEY and ARBISCAN_API_KEY. Our summary lists: A credential in ETHERSCAN_API_KEY; A credential in BSCSCAN_API_KEY.

Does Etherscan access the network?

SKILL.md names 6 domains. In commands or code: api.etherscan.io, api.bscscan.com, api.polygonscan.com, api.arbiscan.io, api-optimistic.etherscan.io and api.basescan.org; the agent is likely to contact these when it follows the instructions. This is read from the text; nothing was executed.

Is Etherscan safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Etherscan use?

Etherscan is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Etherscan use?

About 958 tokens (SKILL.md is roughly 3.8k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Etherscan?

Skills that share tags, products or a category with Etherscan: Wagmi Feature Development (wevm/wagmi, 6.8k stars), Release Round (ethereumjs/ethereumjs-monorepo, 2.8k stars), NEAR Intents Swap Integration (internet-court/internet-court-skill, 6.4k stars) and Update Est Fixtures (ethereumjs/ethereumjs-monorepo, 2.8k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Etherscan?

TermiX-official (a GitHub organization) maintains it in TermiX-official/cryptoclaw, which has 100 GitHub stars. The repository holds 34 skills in this directory. The repository was last updated on May 25, 2026.

Source: TermiX-official/cryptoclaw on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.

Install Etherscan

Facts

At a glance

What it does

Example prompts

Requirements

Workflow steps

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

Multi-chain Explorer API

Supported Explorers

Modules & Actions

Account — Transaction History

Account — Token Transfers (ERC-20)

Account — ERC-721 Transfers

Account — Balance

Contract — Get ABI

Contract — Get Source Code

Gas Tracker (Ethereum only)

Workflow: Dynamic Contract Interaction

Usage Notes

Example Queries

Files

Compare with similar skills

Similar skills

More from TermiX-official/cryptoclaw

Related

Questions about Etherscan