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EVM Blockchain Skill · nousresearch | DecimalAI

financeby nousresearch

EVM Blockchain Skill

nousresearch/evm

Source nousresearch/hermes-agent ↗License MIT

Read-only EVM client: wallets, tokens, gas across 8 chains.

SkillScore86Maintained

Automatic

Coding pack

Last verified 8/17/2026

What it changes

Passed 16 of 19 test cases with the skill, and 5 of 19 without it.

Without skill27%

With skill86%

Checks it passed that the model alone missed

Sets --blocks 100 and --min-usd 500000
Uses the wallet subcommand with --chain bsc
Uses the gas subcommand with --chain optimism

and 11 more in the full report

13 fixed6 passed either way3 still failing0 broke

Pass-rate lift: +59 pp
Tokens: +56%
Agent turns: 0%
Response time: -66%

Model gemini-3.6-flashMeasured 8/17/2026v219 of 22 cases passed with skill · 19 comparable

Tokens, turns and time describe resource use, not a dollar price.

Use this skill

Save it into your project's skills folder. Claude Code picks it up in its next session.

curl -fsSL --create-dirs -o .claude/skills/nousresearch-evm/SKILL.md https://app.decimal.ai/s/nousresearch-evm/SKILL.md

Want it pinned and updatable? pip install "decimalai>=0.15", then decimalai skills add nousresearch-evm, and start Claude Code with claude --plugin-dir "$(git rev-parse --show-toplevel)/.agents"

1 · One-time — install the CLI (docs ↗)

pip install "decimalai>=0.15"

2 · Get the skill — writes .agents/skills/nousresearch-evm/ and pins it in .decimal/skills.lock

decimalai skills add nousresearch-evm

No CLI? Get the same file — curl · raw file

curl -fsSL --create-dirs -o .claude/skills/nousresearch-evm/SKILL.md https://app.decimal.ai/s/nousresearch-evm/SKILL.md

Raw file: /s/nousresearch-evm/SKILL.md ↗ · machine-readable summary at /s/nousresearch-evm.json ↗

Safety checks: 3 of 3 passed

Code scan CleanIntent PassedContent Clean

See it in action

One of 13 test cases the skill fixed. Same model, same prompt, with and without the skill.

1 of 13

Prompt

I have wallet address 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 and want to perform a reverse lookup to find its primary ENS domain name. What CLI subcommand should I use?

What was checked, without and with the skill
Checked	Without skill	With skill
Uses the ens subcommand targeting 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045	Missed	Passed

case-13 · gemini-3.6-flash · 8/17/2026 · answers are capped and redacted

What's inside

The instructions your model reads when the skill loads.

SKILL.md196 lines2 filesincludes scripts

EVM Blockchain Skill

Query EVM-compatible blockchain data across 8 chains with USD pricing. 14 commands: wallet portfolio, token info, transactions, activity, gas tracker, network stats, price lookup, multi-chain scan, whale detection, ENS resolution, allowance checker, contract inspector, and transaction decoder.

Supports 8 chains: Ethereum, BNB Chain (BSC), Base, Arbitrum One, Polygon, Optimism, Avalanche (C-Chain), zkSync Era.

No API key needed. Zero external dependencies — Python standard library only (urllib, json, argparse, threading).

Supersedes the standalone base skill. Base-specific tokens (AERO, DEGEN, TOSHI, BRETT, WELL, cbETH, cbBTC, wstETH, rETH) and all Base RPC functionality previously living under optional-skills/blockchain/base/ have been folded into this skill. Pass --chain base to any command for Base coverage.

When to Use

User asks for a wallet balance or portfolio on any EVM chain
User wants to check the same wallet across ALL chains at once
User wants to inspect a transaction by hash (or decode what it did)
User wants ERC-20 token metadata, price, supply, or market cap
User wants recent transaction history for an address
User wants current gas prices or to compare fees across chains
User wants to find large whale transfers in recent blocks
User asks to resolve an ENS name (vitalik.eth) or reverse-lookup an address
User wants to check if a contract has dangerous token approvals
User wants to inspect a smart contract (proxy? ERC-20? ERC-721? bytecode size?)
User wants to compare gas costs across chains before a transaction

Prerequisites

Python 3.8+ standard library only. No pip installs required. Pricing: CoinGecko free API (rate-limited, ~10-30 req/min). ENS: ensideas.com public API. Tx decoding: 4byte.directory public API.

Track record

Benchmark

16 / 19

test cases passed, vs 5 / 19 without

Adoption

Users: 0
Times used: 0

Safety and source details

SkillSafety

✓ 3 of 3 passed

Code scan15 of 15 checks clean

0 critical · 0 warning · 0 info — scanner v5 — 8/17/2026

View 15 scanner checks

live_secretremote_code_executionreverse_shelldata_exfiltrationssrf_metadataagent_snoopinganti_refusaldestructive_commandsobfuscated_unicodeunicode_homoglyphopaque_blobsuspicious_urltool_overreachtrigger_abuseprompt_injection_phrasing

IntentSafe

LLM judge · does the skill do what it claims

ContentClean

LLM judge · policy & harmful-content review

Source

Imported

nousresearch / hermes-agent

optional-skills/blockchain/evm/SKILL.md

View on GitHub ↗

License MITImported 8/17/2026Version v2Bundled 1 file · scripts

More skills from the same source and nearby in the registry, with their headline benchmark lift.

Ready to supercharge your AI agents?

See it in action

What's inside

EVM Blockchain Skill

When to Use

Prerequisites

Track record

Benchmark

Adoption

SkillSafety

Source

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