Simmer
Prediction-market harness for agents: one SDK, MCP server and skill catalogue to trade Polymarket and Kalshi, with a virtual $SIM practice venue.
- Sato Score68
- ChainsPolygon
Simmer is a partly open-source trading tool on Polygon, with last code activity on 2026-11-06 (Active). Latest release on 2026-06-10. Sato Score 68/100 (how open, active and verifiable it is, not a safety grade), as of 2026-11-07. How the score works →
Check what an install would ask of your keys, before you run it →Last commit Nov 6, 2026 · Last release Jun 10, 2026 · ★ 52
Listed from simmer.markets on 2026-09-23. Install: not attempted — no install path on record. Evidence →
Next step
Watch Simmer
One email if what we observe changes — its repo goes quiet or disappears, or the listing is retired. Nothing else.
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Prove you control the domain and correct this page — description, links, tags, chains. A claim proves control, not verification: it never changes the Sato Score.
Claim this listing →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.
Sato Score
68/100· MediumHow open, active & verifiable — not a safety or returns grade.
- Maintenance & liveness
- 35/35
- Code transparency
- 14/20
- Interface verifiability
- 0/10
- Docs & demo
- 6/10
- Listing transparency & provenance
- 10/15
- Independent verification
- 3/10
Evidence — listed vs checked · what the words mean
Listed from simmer.markets on 2026-09-23. Install: not attempted — no install path on record.
| Claim | Value | Evidence | Source | Checked |
|---|---|---|---|---|
| Chains supported | Polygon | self-reported | docs.simmer.markets | as of 2026-11-07 |
| Verification status | Self-Reported — not independently reviewed | self-reported | simmer.markets | as of 2026-11-07 |
| Recent activity | last release 2026-06-10 · last commit 2026-11-06 | observed | github.com/SpartanLabsXyz/simmer-sdk | 2026-11-07 |
| Website answers | answered (HTTP 307) | observed | simmer.markets | 2026-11-07 |
| Daily check record | 45 of 45 daily checks since 2026-09-23 succeededa success rate of our checks, not uptime; the source is this listing's own history | observed | — | 2026-11-06 |
| Works with | OpenClaw, ClawHub, MCP, Polymarket, Kalshi, Hyperliquid, PyPI, npmconfidence 0.80 | self-reported | github.com/SpartanLabsXyz/simmer-sdk | as of 2026-10-01 |
| Tags | prediction-markets, polymarket, kalshi, mcp, agent-skills, sdk, hyperliquid, op…confidence 0.80 | self-reported | github.com/SpartanLabsXyz/simmer-sdk | as of 2026-10-01 |
| Sato Score | 68/100 (Medium)how open, active and verifiable — not a safety or quality grade | computed | satohub.ai | 2026-11-07 |
Self-reported rows are the project’s own words, dated when we recorded them — not a check. Only reproduced and reviewed rows carry a mark. None of these rows is a safety or quality rating.
Observed record — 46 daily checks since 2026-09-23
- Succeeded
- 46
- Failed
- 0
- Their error
- 0
- Unattributed
- 0
This is the share of our daily checks that succeeded — not an availability guarantee. A check can fail because the host was down, because our runner timed out, or because the network in between dropped it, and only the first of those is a fact about this project. Failures are split by what we can attribute; anything we cannot attribute is counted, not hidden.
Last 30 days — to 2026-11-07, one point per UTC day
A gap is a day we have no attributable observation — never a zero. Thirty points is the whole shape the free layer carries; the daily rows behind it stay in the snapshot series.
Details
- Chains
- Polygon
- Agent types
- Trading, Skill
- Open source
- Partial
- Works with
- OpenClaw, ClawHub, MCP, Polymarket, Kalshi, Hyperliquid, PyPI, npm
- Last checked
- 2026-11-07
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.
Where Simmer fits
Related concepts: How Agents Interact With Smart Contracts, How Agents Use Wallets, What Are Onchain Agents?
Listing History
Recorded changes to Simmer's listing — status, verification, Sato Score, and recent releases. Full history is kept in the listing record.
- Oct 1, 2026Auto-enriched: supported integrations, tags
- Sep 23, 2026Listed on Sato Hub
- Sep 23, 2026Sato Hub began tracking this listing
Compared with
Appears in
Related Resources
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ActiveCoinbase's toolkit for giving AI agents wallets and the ability to take onchain actions.
Hyperliquid
ActiveOnchain perpetual futures and spot DEX running on its own L1 with an HyperEVM smart-contract layer.
Jupiter
ActiveSolana swap aggregator that routes trades across DEXs via a widely used API and SDKs.
Reference
QuestionsWhat people ask about this pageShowHide
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 2026-11-07.
- Which chains does Simmer support?
- Simmer lists support for Polygon as of 2026-11-07.
- Is Simmer still maintained?
- The most recent code activity Sato Hub observed was on 2026-11-06 (last commit 2026-11-06, last release 2026-06-10), which Sato Hub labels "Active". Posts on X are not counted as maintenance. Activity is a recency signal, not a quality judgment.
- 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" and its Sato Score is 68 of 100. Self-reported is not verified, and the score is not a safety, quality or returns grade.
Cite this pagePlain text, APA or BibTeXShowHide
Cite this page
Sato Hub. "Simmer — Sato Hub." Sato Hub, updated 2026-11-07, accessed 2026-11-07. https://satohub.ai/resources/simmerData last refreshed 2026-11-07; 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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