Polymarket Multi Source Estimator

Trade prediction markets using LLM probability estimation enriched with 10+ real-time data sources (news, economic data, sports odds, political polling, and more). The skill fetches context from RSS feeds, FRED, GDELT, bookmaker odds, and other APIs, then asks an LLM to estimate the true probability. Trades when the estimate diverges significantly from the market price.

Multi-Source LLM Estimator

A prediction market trading bot that enriches an LLM with real-time context from 10+ data sources. It compares the LLM's estimated probability against the current market price and trades when it detects significant mispricing.

How It Works

text

10+ Data Sources --> Context String --> LLM Prompt --> Probability Estimate
                                                              |
                                                    Compare vs Market Price
                                                              |
                                              Trade if divergence > threshold

1. Fetches active markets from Polymarket (via Simmer SDK)
2. For each market, gathers real-time context from relevant data sources
3. Also checks cross-platform prices on Manifold and Kalshi
4. Sends the question + context to an LLM for probability estimation
5. If the LLM's estimate diverges from the market price by more than the threshold (default 15%), it places a trade

Data Sources

#	Source	What It Provides	API Key Required
1	RSS News	Headlines from 10 feeds (Reuters, BBC, Bloomberg, etc.)	No
2	FRED	Economic indicators (Fed rate, CPI, GDP, VIX, oil, gold)	Yes (free)
3	GDELT	Geopolitical event sentiment scores	No
4	Odds API	Sports bookmaker consensus probabilities	Yes (free tier)
5	FiveThirtyEight	US presidential approval polling averages	No
6	Congress.gov	Bill status and legislative tracking	Yes (free)
7	OpenFDA	Drug approval status and clinical trial data	No
8	Open-Meteo	Weather forecasts for major cities	No
9	USGS	Significant earthquake data	No
10	Finnhub	Earnings calendar and IPO data	Yes (free)
11	Manifold	Cross-platform prediction market prices	No
12	Kalshi	Cross-platform prediction market prices	No

Sources are selected automatically based on category detection from the question text. Only relevant sources are queried to minimize latency.

Remixable Template

This skill is designed as a template you can customize:

• Add your own data source: Implement a _get_X_context(question) function that returns a list[str] of context lines. Add it to _dispatch_sources().
• Swap the LLM: Set LLM_API_URL and LLM_MODEL env vars to point at any OpenAI-compatible API (OpenRouter, Ollama, vLLM, etc.).
• Adjust the threshold: Set ESTIMATOR_THRESHOLD higher for fewer but higher-conviction trades, or lower for more frequent trading.
• Change the prompt: Edit the _build_prompt() function to customize the LLM's reasoning style.

Environment Variables

Required

Variable	Description
SIMMER_API_KEY	Simmer SDK API key for trading
LLM_API_KEY	API key for your LLM provider (default: OpenRouter)

Optional

Variable	Default	Description
TRADING_VENUE	sim	Trading venue (sim for paper, polymarket for real)
TRADE_SIZE	10.0	Trade size in USD per trade
LLM_API_URL	OpenRouter endpoint	OpenAI-compatible chat completions URL
LLM_MODEL	xiaomi/mimo-v2-flash:free	Model identifier
ESTIMATOR_THRESHOLD	0.15	Min divergence to trigger a trade (0.0-1.0)
FRED_API_KEY	—	FRED API key (free at api.stlouisfed.org)
ODDS_API_KEY	—	The Odds API key (free at the-odds-api.com)
CONGRESS_API_KEY	—	Congress.gov API key (free)
FINNHUB_API_KEY	—	Finnhub API key (free tier)
LLM_CACHE_TTL	1800	LLM response cache TTL in seconds
LLM_MAX_CALLS	50	Max LLM calls per run

Usage

Dry-run (no trades, just log estimates):

bash

python multi_source_estimator.py

Live trading:

bash

python multi_source_estimator.py --live

Quiet mode (errors only):

bash

python multi_source_estimator.py --live --quiet

Limit markets scanned:

bash

python multi_source_estimator.py --live --max-markets 20

Scheduling

Runs every 5 minutes via cron (*/5 * * * *). Managed automaton (auto-executes on schedule). Capped at 50 LLM calls per run (LLM_MAX_CALLS) to control costs.

Security

• All trades go through SimmerClient.trade() only. No direct CLOB or wallet access.
• Dry-run by default. The --live flag must be explicitly passed to execute trades.
• No wallet private keys are required or read by this script.
• LLM receives only the market question text and publicly available context (news headlines, economic indicators, odds). No credentials or private data are sent to the LLM.
• LLM_API_URL defaults to OpenRouter. You control which LLM endpoint is used.
• All optional API keys (FRED, Odds, Congress, Finnhub) are for free public data APIs. If unset, those data sources are simply skipped.