Polymarket Maker Rebate Bot

For Claude: How to Use This Skill

Skill instructions are preloaded in context when this skill is active. Do not perform filesystem searches or tool-driven exploration to rediscover them; use the guidance below directly.

When to Use

• run a fast 90-day backtest on Polymarket maker-rebate logic before trading
• market make on Polymarket with rebate-aware quoting and inventory controls
• compare paper backtest outcomes, then decide whether to run quote mode

On Invoke

Immediately run the default 90-day backtest without asking. Do not present a menu of modes. Execute:

cd ~/.config/seren/skills/polymarket-maker-rebate-bot && source .venv/bin/activate && python3 scripts/agent.py --config config.json

Display the full backtest results to the user. Only after results are displayed, present available next steps (quote mode, unwind, monitor). If the user explicitly requests a specific mode in their invocation message, run that mode instead.

Workflow Summary

1. fetch_backtest_universe loads candidate markets from Seren Polymarket publishers (or local fixtures).
2. replay_90d_history runs an event-driven, stateful replay with inventory and cash carried forward.
3. score_edge_and_pnl estimates realized edge and PnL using order-book-aware fills plus pessimistic spread decay.
4. summarize_backtest returns return %, drawdown, fill telemetry path, quoted rate, and market-level results.
5. filter_markets removes markets outside the default safe band ($0.30-$0.70 midpoint), below the default daily-volume floor ($5,000), or inside the default resolution buffer (14 days).
6. inventory_guard tracks held inventory across cycles, forces sell_only behavior on policy-breaching markets, and escalates to a marketable unwind after the default 3-cycle hold limit or when inventory drifts outside the safe midpoint band.
7. emit_quotes produces quote intents in quote mode after backtest review.
8. live_guard blocks live execution unless both config and explicit CLI confirmation are present.

Execution Modes

• backtest (default): runs a 90-day historical replay and outputs results immediately.
• quote: computes current quote intents with inventory/risk guards.
• monitor: alias for quote-style dry monitoring output.
• live: requires both execution.live_mode=true in config and --yes-live CLI confirmation.

Live execution also requires:

• POLY_PRIVATE_KEY (or WALLET_PRIVATE_KEY) for EIP-712 order signing
• POLY_API_KEY, POLY_PASSPHRASE, and POLY_SECRET for authenticated submission

Trade Execution Contract

When the user gives a direct exit instruction (sell, close, exit, unwind, flatten), execute the exit path immediately. Do not editorialize or argue against recovering remaining funds. If the user request is ambiguous, ask only the minimum clarifying question needed to identify the positions to exit.

CLOB Exit Rules

• py-clob-client via DirectClobTrader is the canonical live execution path.
• For immediate sells, use a marketable limit priced at the market minimum tick from the live order book. Do not hardcode $0.001; use the current tick_size.
• Never place a passive sell above the best bid when the user asked for an immediate exit.
• Estimate recovery by sweeping visible bid levels (price x size) across the full book, not just the best bid.
• If visible bid depth cannot cover the full exit size, report the partial-depth estimate and remaining unfilled size.

Pre-Trade Checklist (Mandatory)

Before any live buy, sell, or unwind:

1. Fetch the live order book for every token involved.
2. Snap prices to the market tick_size and compute visible-book recovery or cost across all levels.
3. Verify the current environment can legally and technically reach the Polymarket CLOB API. If access is blocked, stop and report the restriction; do not suggest bypasses.
4. Verify py-clob-client is installed and POLY_PRIVATE_KEY or WALLET_PRIVATE_KEY, POLY_API_KEY, POLY_PASSPHRASE, and POLY_SECRET are loaded.
5. If any dependency check fails, fail closed with a concrete remediation message.

Emergency Exit

Immediately liquidate held inventory with:

python3 scripts/agent.py --config config.json --unwind-all --yes-live

The unwind path cancels open orders first, then submits marketable min-tick sells and reports visible-book exit estimates.

Runtime Files

• scripts/agent.py - rebate-aware quoting engine with risk guards
• scripts/setup_cron.py - create/update the skill-local seren-cron local-pull runner and job
• scripts/run_local_pull_runner.py - poll seren-cron and execute due local jobs on this machine
• config.example.json - baseline strategy and 90-day backtest parameters
• .env.example - optional fallback auth/env template (SEREN_API_KEY only if runtime auth is unavailable)
• requirements.txt - installs py-clob-client for live order signing/submission

API Key Setup

Before running this skill, check for an existing Seren API key in this order:

1. Seren Desktop auth — if the skill is running inside Seren Desktop, the runtime injects API_KEY automatically. Check: echo $API_KEY. If set, no further action is needed.
2. Existing .env file — check if SEREN_API_KEY is already set in the skill's .env file. If set, no further action is needed.
3. Shell environment — check if SEREN_API_KEY is exported in the current shell. If set, no further action is needed.

Only if none of the above are set, register a new agent account:

curl -sS -X POST "https://api.serendb.com/auth/agent" \
  -H "Content-Type: application/json" \
  -d '{"name":"polymarket-maker-rebate-bot"}'

Extract the API key from the response at .data.agent.api_key — this key is shown only once. Write it to the skill's .env file:

SEREN_API_KEY=<the-returned-key>

Verify:

curl -sS "https://api.serendb.com/auth/me" \
  -H "Authorization: Bearer $SEREN_API_KEY"

Do not create a new account if a key already exists. Creating a duplicate account results in a $0-balance key that overrides the user's funded account.

Reference: https://docs.serendb.com/skills.md

Quick Start

cd ~/.config/seren/skills/polymarket-maker-rebate-bot
python3 -m venv .venv
source .venv/bin/activate
python -m pip install --upgrade pip
python -m pip install -r requirements.txt
cp .env.example .env
cp config.example.json config.json
python3 scripts/agent.py --config config.json

This runs the default 90-day backtest and returns a decision hint to keep paper-only or proceed to quote mode. If you are already running inside Seren Desktop, the runtime can use injected auth automatically.

Live market data only. Always leave "markets": [] and "state": {"inventory": {}} empty in your config.json. The skill fetches live markets automatically from the Polymarket API via backtest.gamma_markets_url. Never add placeholder or example market IDs (e.g. MKT-001) — they do not exist on Polymarket and will cause the backtest to fail with "No markets with sufficient history". Leave "state.inventory_cycles": {} empty as well. The runtime increments hold-cycle state from live positions and uses it to trigger inventory unwinds.

Run Quote Mode (After Backtest Review)

python3 scripts/agent.py --config config.json --run-type quote

Optional Backtest Input

By default the runtime fetches backtest data from Polymarket market/history APIs. You can also pass local history:

python3 scripts/agent.py \
  --config config.json \
  --run-type backtest \
  --backtest-file tests/fixtures/backtest_markets.json

Each backtest market object should include:

• market_id (string)
• question (string)
• token_id (string)
• end_ts or endDate (market resolution timestamp)
• history array of { "t": unix_ts, "p": probability_0_to_1 }
• optional orderbooks array of { "t": unix_ts, "best_bid": ..., "best_ask": ..., "bid_size_usd": ..., "ask_size_usd": ... }
• optional rebate_bps (number; otherwise default rebate from config)

Seren Predictions Intelligence

After a backtest completes, the output will suggest enabling Seren Predictions if it is not already active. This optional feature uses cross-platform consensus and divergence signals from Kalshi, Manifold, Metaculus, PredictIt, and Betfair to:

• Boost market selection scores for markets where Polymarket diverges from consensus
• Add directional skew to quotes based on cross-platform price differences
• Filter for higher-edge opportunities where platforms disagree

To enable, set predictions_enabled: true in the backtest section of your config.json. Estimated cost: ~$0.30 SerenBucks per backtest run.