hermes-mine-bean 0.2.1

MineBean ($BEAN) round-based mining plugin for Hermes Agent

hermes-mine-bean

A Hermes Agent plugin for mining $BEAN on the MineBean protocol, live on Base mainnet.

Round-based on-chain deployment, five strategy presets, autonomous cron mode, signed Gitlawb audit log. Works inside Hermes Agent, Claude Desktop, Cursor, or any MCP-aware client.

Status: v0.2 release candidate. Live broadcast is gated by a final dev review of the key-handling path. All tools work today against mainnet in dry-run mode and readonly mode.

What MineBean is (60 seconds)

5x5 grid. New round every 60 seconds. Each round you pick blocks, deploy ETH into them, and earn $BEAN rewards plus an ETH share when your round closes. Roughly 1-in-777 rounds hit a beanpot jackpot. Contract addresses, agent stats, and the full game state are at minebean.com.

This plugin gives any Hermes agent the seven tools needed to read the live game, plan deploys, broadcast them through a wallet you control, and run a cron-driven autonomous miner with a hard daily ceiling.

Install

pip install git+https://github.com/damo-nu11/hermes-mine-bean.git
hermes plugins enable minebean

With MCP support for Claude Desktop, Cursor, or any other MCP client:

pip install "hermes-mine-bean[mcp] @ git+https://github.com/damo-nu11/hermes-mine-bean.git"

From source (for contributing):

git clone https://github.com/damo-nu11/hermes-mine-bean.git
cd hermes-mine-bean
python3 -m venv .venv
source .venv/bin/activate
pip install -e ".[mcp]"

A PyPI release will follow once the plugin has run for a few days in the field. Until then, install from the git URL above.

Configure

Add to ~/.hermes/.env:

# --- For broadcasting (autonomous mining) ---
# Use a dedicated wallet you fund only for this purpose. Never your main.
MINEBEAN_DEPLOYER_KEY=0x...

# --- Or for Bankr-managed signing ---
# BANKR_API_KEY=bk_ptr_...
# MINEBEAN_MINER_ADDRESS=0x...

# --- Or readonly inspection (no key needed) ---
# MINEBEAN_MINER_ADDRESS=0x...

# --- Safety guards (recommended) ---
MINEBEAN_MAX_DEPLOYS_PER_DAY=100
MINEBEAN_PER_BLOCK_WEI=2500000000000
MINEBEAN_MAX_DEPLOY_WEI=10000000000000000  # 0.01 ETH cap per round

# --- Strategy data feeds (defaults work for most users) ---
# MINEBEAN_BEAN_PRICE_ETH=                       # offline override, otherwise fetched from api.minebean.com
# MINEBEAN_PRICE_URL=                            # custom price endpoint
# MINEBEAN_BEANPOT_HISTORICAL_MAX_BEAN=700       # beanpot-hunter campaign cap

# --- Optional RPC override ---
# BASE_RPC_URL=https://mainnet.base.org

chmod 600 ~/.hermes/.env so other users on the machine can't read it.

Security-sensitive env vars (never commit, never share, never log):

• MINEBEAN_DEPLOYER_KEY — your wallet private key
• MINEBEAN_LIVE_BROADCAST_UNLOCKED — when set to 1, enables live broadcast. Leave unset (the default) until you've personally reviewed signer.py and are ready to send real transactions. Treat this flag like the key itself: only set it on a machine you control, never in shared configs or CI.

Tools

Tool	Purpose	Signer required
minebean_status	Live round state, beanpot pool, caller's pending balances	No (works with address only)
minebean_pending	Pending ETH + BEAN for any address	No
minebean_set_profile	Save default strategy (sniper, anti-winner, beanpot-hunter, anti-loser, nostradamus)	No
minebean_deploy	Build deploy plan, optionally broadcast	Yes for broadcast, no for dry-run
minebean_claim	Claim pending winnings	Yes
minebean_autostart	Install autonomous mining cron job	Yes
minebean_autostop	Remove the cron job	No

Slash command: /minebean <subcommand>. Try /minebean status first to confirm everything is wired correctly.

All write paths default to dry_run=True while the live broadcast gate is in place. You'll see the resolved plan, gas estimate, and ceiling status without sending a transaction.

Strategy presets

All five strategies use the closed-form EV optimum X* = sqrt(K × P × T) − T where P is BEAN price in ETH, T is the relevant deployment total (strategy-specific), and K = B / FEE_DRAG is the strategy's EV constant.

Preset	Blocks	T source	K	Behaviour at T ≥ threshold
anti-winner	24 (excl. prev winner)	current grid total	10.476 (B=1.1)	Deploy minimum for beanpot eligibility
nostradamus	All 25	avg of last 3 settled rounds	9.524 (B=1.0)	Skip
anti-loser	24 (excl. coldest in last 100)	max(grid, avg of last 3)	9.524	Skip
sniper	All 25	live grid at deploy time	9.524	Skip
beanpot-hunter	All 25	current grid total	dynamic (B = 1 + beanpot/777)	Skip if beanpot < 62.16 BEAN

Beanpot-hunter adds a campaign-sizing layer on top of the formula: deploy size scales linearly from 0.5% of wallet balance at the 62.16 BEAN threshold to the configured maximum at the historical max pot (default 700 BEAN). The EV formula acts as a floor.

Sniper adds adaptive binary-search timing (5s initial offset, 2-10s range, 0.5s step), applied at broadcast time. Timing supervision is left to the cron entry or an LLM supervisor running every 10 rounds.

Common floor: per-block deploy is grossed up by the 1% vault fee so the net amount clears the MIN_DEPLOY contract floor (0.0000025 ETH/block).

First live broadcast

After your dev review of signer.py clears, walk through this once before enabling cron mode.

1. Fund the wallet — send ~0.005-0.01 ETH on Base to the address MINEBEAN_DEPLOYER_KEY resolves to. Enough for one or two anti-winner deploys plus gas.

2. Set safety caps in ~/.hermes/.env:

   MINEBEAN_LIVE_BROADCAST_UNLOCKED=1
   MINEBEAN_MAX_DEPLOYS_PER_DAY=1
   MINEBEAN_MAX_DEPLOY_WEI=200000000000000   # 0.0002 ETH cap, raise after first success
   

3. Load env into your shell (whitelist the MineBean vars; skips any stray non-env-style lines):

   while IFS= read -r line; do
     case "$line" in
       MINEBEAN_*=*|BASE_RPC_URL=*) export "$line" ;;
     esac
   done < ~/.hermes/.env
   

4. Run the broadcast interactively:

   hermes-minebean-deploy --profile anti-winner --no-dry-run
   

5. Verify the JSON output:

   • broadcast.ok: true
   • broadcast.stage: "confirmed"
   • broadcast.receipt.status: 1
   • broadcast.tx_hash: "0x..." (paste into https://basescan.org/tx/{hash} to inspect)

6. Raise MINEBEAN_MAX_DEPLOYS_PER_DAY to your desired cap, then move to cron mode (next section).

If broadcast.ok is false, the stage field tells you exactly what failed: sign_failed, broadcast_failed, receipt_timeout, reverted, ceiling_reached, or live_broadcast_blocked. The daily counter only increments on stage="confirmed", so a failed run doesn't burn quota.

Autonomous mode

Two ways to start a scheduled miner.

Via slash command:

/minebean autostart every 60s

Via Hermes cron directly:

hermes cron add --name "MineBean deploy" --no-agent \
  --script ~/.hermes/scripts/minebean-deploy.sh "every 60s"

The cron entry runs hermes-minebean-deploy, which:

• Enforces MINEBEAN_MAX_DEPLOYS_PER_DAY (atomic counter under ~/.hermes/.minebean/)
• Exits 0 on a normal skip or ceiling hit (no error spam)
• Exits 1 on a real failure
• Exits 130 on SIGINT
• Emits one JSON line per run for log scraping

Stop with /minebean autostop or hermes cron remove <name>.

MCP server

The [mcp] extra ships a hermes-minebean-mcp console script that speaks JSON-RPC over stdio.

Claude Desktop (~/Library/Application Support/Claude/claude_desktop_config.json):

{
  "mcpServers": {
    "minebean": {
      "command": "hermes-minebean-mcp",
      "env": {
        "MINEBEAN_MINER_ADDRESS": "0xYourAddress",
        "MINEBEAN_MAX_DEPLOYS_PER_DAY": "100"
      }
    }
  }
}

Cursor (.cursor/mcp.json in your project):

{
  "mcpServers": {
    "minebean": {
      "command": "hermes-minebean-mcp"
    }
  }
}

Restart the client, then ask: "What's the current MineBean round?"

The MCP server registers all 7 tools with full schemas. Deploy and claim default to dry-run from the MCP surface too.

Private inference (Venice)

If your conversational layer needs to be log-free, route Hermes through Venice using its BYOK provider config. The mining loop itself only touches public Base RPCs and the GridMining contract, so privacy is about your chat with the agent, not the mining transactions (which are on-chain and public by definition).

Add to ~/.hermes/.env:

HERMES_INFERENCE_PROVIDER=venice
HERMES_VENICE_API_KEY=...
HERMES_VENICE_NO_LOG=1

Zero-install via .well-known

You can also load this skill without pip install by pointing a Hermes-compatible client at:

https://agent.minebean.com/.well-known/skills/index.json

The discovery endpoint returns a SKILL.md and a minimal stdlib readonly client (scripts/minebean_client.py). Useful for prototyping or for clients that prefer file-based skill loading.

Verifiability

Every round is mirrored to a signed Gitlawb repository:

gitlawb://did:key:z6MkwVfgaAnuypajisEkJLkVbWPiPEBwceMkGutfXpEEYHKi/minebean-rounds

Append-only, signed, and replicated across the Gitlawb network, with new round files landing every 5 minutes. Pull the window file for any time range to audit any outcome without trusting minebean.com.

Safety

• dry_run=True is the hard default on every write path. Live broadcast requires MINEBEAN_LIVE_BROADCAST_UNLOCKED=1.
• make_signer() raises in every non-readonly branch (the broadcast path is wired but disabled at the source)
• MINEBEAN_MAX_DEPLOYS_PER_DAY blocks both the cron entry and the interactive deploy handler. The counter is fcntl-locked so overlapping crons cannot under-count.
• The GridMining contract enforces one deploy per round per address. The plugin mirrors this client-side.
• Cron wrapper script is chmod 700 (user-only rwx) because it sources ~/.hermes/.env.
• Readonly mode (just MINEBEAN_MINER_ADDRESS, no key) lets you inspect any address without putting a key anywhere.

Network

Field	Value
Chain	Base mainnet (chain ID 8453)
GridMining	0x9632495bDb93FD6B0740Ab69cc6c71C9c01da4f0
BEAN token	0x5c72992b83E74c4D5200A8E8920fB946214a5A5D
Default RPC	https://mainnet.base.org

ABIs ship in src/hermes_minebean/abi/. The GridMining ABI is extracted from the deployed contract via BaseScan.

Repo layout

hermes-mine-bean/
├── pyproject.toml             package config + entry points
├── plugin.yaml                Hermes Agent plugin manifest
├── src/hermes_minebean/
│   ├── plugin_entry.py        Hermes register(ctx)
│   ├── mcp_server.py          FastMCP server for Claude/Cursor
│   ├── cli.py                 hermes-minebean-deploy console script
│   ├── tools.py               7 tool handlers
│   ├── schemas.py             OpenAI-style schemas + presets
│   ├── strategies.py          5 strategy resolvers
│   ├── signer.py              eoa | bankr | readonly signer abstraction
│   ├── contract.py            GridMining read + tx-builder client
│   ├── rpc.py                 web3 client with Cloudflare-safe UA
│   ├── state.py               profile + daily counter (fcntl-locked)
│   ├── cron_jobs.py           autostart / autostop wrapper management
│   ├── hooks.py               pre_llm_call keyword gate
│   ├── slash.py               /minebean dispatcher
│   └── abi/gridmining.json
└── coordinator-deliverables/  zero-install skill artifacts (served via agent.minebean.com)

Development

# Activate the venv
source .venv/bin/activate

# Run the readonly smoke test against mainnet
MINEBEAN_MINER_ADDRESS=0xYourTestAddress \
  python -c "from hermes_minebean.tools import _handler_status; print(_handler_status())"

# Run the MCP server and probe with a JSON-RPC client
hermes-minebean-mcp

The plugin is unix-only by design (Hermes Agent itself is unix-only). The daily-counter file lock uses fcntl.

Contributing

Bug reports, strategy formula proposals, and PRs welcome at the issues page.

Before opening a PR:

• Keep tool signatures stable (third parties consume them)
• Note any user-visible behaviour change in the PR description
• Live broadcast changes need a separate review pass

Acknowledgements

• Nous Research for Hermes Agent and the plugin spec
• The MineBean protocol team for the on-chain game
• Anthropic for the MCP protocol that makes this work in Claude Desktop and Cursor

License

MIT. See LICENSE for the full text.