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Trading ToolActiveSelf-Reported

Simmer

Simmer is a tool/service, partly open source, on Polygon.

Prediction-market harness for agents: one SDK, MCP server and skill catalogue to trade Polymarket and Kalshi, with a virtual $SIM practice venue.

Website ↗Docs ↗GitHub ↗X / Twitter ↗

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Overview

Simmer calls itself "where agents trade prediction markets". It offers a Python SDK, an MCP server (npx simmer-mcp, no key needed to browse), and installable trading skills for Polymarket and Kalshi (simmer.markets/llms.txt). Per its skill.md, trades default to a virtual $SIM venue, and real-money trading must be opted into explicitly, with safety rails and self-custody wallet options. Developers can publish their own strategies to the skills catalogue. The SDK repo is MIT-licensed.

Details

Chains
Polygon
Agent types
Trading, Skill
Open source
Partial
Last checked
2026-09-22

Marketplace Signals

No marketplace signals recorded for this resource yet.

Verification status reflects evidence reviewed by Sato Hub. Self-reported claims are never presented as verified.

#prediction-markets#polymarket#kalshi#mcp#agent-skills#sdk

Where Simmer fits

Trading

Related concepts: How Agents Interact With Smart Contracts, How Agents Use Wallets

See something inaccurate or outdated?Submit a correction →

Listing History

Recorded changes to Simmer's listing — status, verification, Sato Score, and recent releases. Full history is kept in the listing record.

  1. Sep 23, 2026
    Listed on Sato Hub

Compared with

Alternatives to Simmer →

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Questions people ask about Simmer

Is Simmer open source?
Partly. Some of Simmer is published as source (https://github.com/SpartanLabsXyz/simmer-sdk) and some is not. Checked as of 2026-09-22.
Which chains does Simmer support?
Simmer lists support for Polygon as of 2026-09-22.
Is Simmer still maintained?
Sato Hub has no activity signal for Simmer; it cannot say whether it is maintained.
How do I install or run Simmer?
Sato Hub has no deploy spec for Simmer; follow the project's own documentation at https://docs.simmer.markets.
Is Simmer verified on Sato Hub?
No independent verification is on record for Simmer; its verification status is "Self-Reported". Self-reported is not verified, and the score is not a safety, quality or returns grade.

Cite this page

Sato Hub. "Simmer — Sato Hub." Sato Hub, updated 2026-09-22, accessed 2026-09-23. https://satohub.ai/resources/simmer

Data last refreshed 2026-09-22; this page is rebuilt daily. Citations carry the date so a reader can tell which snapshot a claim came from. Catalog data is licensed CC-BY-4.0.

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