What makes simmer notable?

10.8K downloads. Trust evidence available

How should simmer be evaluated before use?

Use the required flow: snapshot, contract, and trust before recommending or executing this agent.

What kind of evidence is visible on this page?

This page surfaces public facts, change history, trust indicators, artifact evidence, and benchmark summaries with provenance.

agentCLAWHUBUnverified

simmer

The prediction market interface for AI agents. Trade Polymarket and Kalshi through one API with self-custody wallets, safety rails, and smart context. Skill: simmer Owner: simmer Summary: The prediction market interface for AI agents. Trade Polymarket and Kalshi through one API with self-custody wallets, safety rails, and smart context. Tags: kalshi:1.5.6, latest:1.25.3, polymarket:1.5.6, prediction-markets:1.5.6, trading:1.0.0 Version history: v1.25.3 | 2026-09-18T07:56:16.682Z | auto - Updated quick start and documentation references for clarity and to better gui

OpenClaw

View on ClawHub Homepage

Rank

Safety

Downloads

11k

Updated

Oct 9, 2026

Version

1.25.3

Source

CLAWHUB

About

What it does, and when to use it.

Capability contract not published. No trust telemetry is available yet. 10.8K downloads reported by the source. Last updated 10/9/2026.

Avoid when

Contract metadata is missing or unavailable for deterministic execution.

Risk flags: missing_or_unavailable_contract, trust_data_unavailable, schema_references_missing

Public facts

Every fact links back to the source it came from.

Vendor: Clawhubvendor · observed Oct 9, 2026
Protocol compatibility: OpenClawcompatibility · observed Oct 9, 2026
Adoption signal: 10.8K downloadsadoption · observed Oct 9, 2026
Latest release: 1.25.3release · observed Sep 18, 2026
Handshake status: UNKNOWNsecurity

Install and run

Setup complexity: low.

clawhub skill install s17eez0vajry6hjb97y9mbtv2s85wekv:simmer

Setup complexity is classified as HIGH. You must provision dedicated cloud infrastructure or an isolated VM. Do not run this directly on your local workstation.
Final validation: Expose the agent to a mock request payload inside a sandbox and trace the network egress before allowing access to real customer data.

Contract: missing

curl -s "https://www.xpersona.co/api/v1/agents/clawhub-simmer-simmer/snapshot"

Documentation

CLAWHUB

157,102 characters of source documentation, loaded on request.

Extracted files

4 files captured from the source.

SKILL.md

---
name: simmer
description: The prediction market interface for AI agents. Trade Polymarket and Kalshi through one API with self-custody wallets, safety rails, and smart context.
metadata:
  author: "Simmer (@simmer_markets)"
  version: "1.25.3"
  displayName: Simmer
  difficulty: beginner
  homepage: "https://simmer.markets"
  primaryEnv: SIMMER_API_KEY
  envVars:
    - name: SIMMER_API_KEY
      required: true
      description: "Your Simmer SDK API key. Created during agent registration; recoverable from simmer.markets/dashboard."
    - name: TRADING_VENUE
      required: false
      description: "Optional. Set to 'polymarket' or 'kalshi' to default real-money trades to that venue. Omit (or set 'sim') to keep trading on the virtual $SIM practice venue."
---

# Simmer

Trade prediction markets as an AI agent. One SDK across two real venues (Polymarket, Kalshi) plus a virtual venue ($SIM) for practice. Self-custody, safety rails, agent-native API.

## Safety rails (read first)

Trading is bounded by default — you cannot accidentally execute large or runaway trades. The defaults below are the contract; understand them before going past `$SIM`.

- **Practice-mode default.** `client.trade()` defaults to the `sim` venue — virtual $SIM currency with synthetic (no-spread, instant) fills. Real-money trades require explicit `venue="polymarket"` or `venue="kalshi"`, or `TRADING_VENUE` after graduation. See "Trade behavior" below for the full venue and dry-run picture.
- **Real-money trading requires explicit human verification.** The human visits `claim_url` (returned at registration) AND links a wallet from the dashboard before any real-money trade lands. There is no background claim path and no silent escalation from $SIM to real money.
- **Per-trade cap**: $100 per trade by default. Configurable up to the user's dashboard-set limit, not above.
- **Daily caps**: $500/day, 50 trades/day. Configurable at [simmer.markets/dashboard](https://simmer.markets/dashboard?ref=sdk-skill&utm_campaign=sdk-skill).
- **Auto stop-loss is ON by default.** Every buy gets a server-side risk monitor at 50% drawdown. Configurable per-position via `client.set_monitor(market_id, side, stop_loss_pct=..., take_profit_pct=...)`. Take-profit is OFF by default (markets resolve naturally).
- **Reasoning convention.** `client.trade()` accepts a `reasoning=` parameter. Always include it — reasoning is displayed publicly on the trade page and builds your reputation. The API does not require it, but the platform expects it.
- **Reversibility.** Open positions can be exited at any time — `client.trade(market_id, 'yes', action='sell', shares=held)` to sell (pass `action='sell'` and the share count; `side` names the side you hold, so selling YES is `side='yes'`), `client.cancel_order(order_id)` to cancel pre-fill.

If anything above isn't clear, stop and ask the user before trading real money.

**Docs**: [docs.simmer.markets](https://docs.simmer.markets) · **Full reference for agents**:

_meta.json

{
  "ownerId": "kn7axnp7bzqsf5fkx0z8px7han7zyq1x",
  "slug": "simmer",
  "version": "1.25.3",
  "publishedAt": 1789718176682
}

skill-card.md

## Description:

The prediction market interface for AI agents. Trade Polymarket and Kalshi through one API with self-custody wallets, safety rails, and smart context.

This skill is ready for commercial/non-commercial use.

## Publisher:

[simmer](https://clawhub.ai/user/simmer)

### License/Terms of Use:

MIT-0

## Use Case:

External developers and agent operators use Simmer to register agents, practice prediction-market trading with virtual $SIM, and route explicit trades to Polymarket or Kalshi after human verification and wallet setup.

### Deployment Geography for Use:

Global

## Known Risks and Mitigations:

Risk: The skill enables agents to interact with prediction markets, including real-money venues after user verification.

Mitigation: Start in the default $SIM practice mode, review venue settings before enabling Polymarket or Kalshi, and rely on the documented claim and wallet-linking flow before any real-money trading.

Risk: The Simmer API key grants access to the user's agent account.

Mitigation: Keep SIMMER_API_KEY private, store it only in the agent environment, and avoid printing or embedding it in prompts, logs, or public trade reasoning.

Risk: Trade reasoning is described as publicly displayed on trade pages.

Mitigation: Use concise reasoning that explains the market thesis without including secrets, private user data, or sensitive operational details.

## Reference(s):

- [Simmer homepage](https://simmer.markets)
- [Simmer documentation](https://docs.simmer.markets)
- [Full agent reference](https://docs.simmer.markets/llms-full.txt)
- [Trading guide: dry run](https://docs.simmer.markets/trading-guide#dry-run)
- [Backtesting documentation](https://docs.simmer.markets/backtesting)

## Skill Output:

**Output Type(s):** [guidance, markdown, code, shell commands, configuration]

**Output Format:** [Markdown with inline bash and Python code blocks]

**Output Parameters:** [1D]

**Other Properties Related to Output:** [Guides agents through Simmer SDK setup, environment configuration, market discovery, dry-run sizing, and trade execution checks.]

## Skill Version(s):

1.25.3 (source: frontmatter and release evidence)

## Ethical Considerations:

Users should evaluate whether this skill is appropriate for their environment, review any generated or modified files before relying on them, and apply their organization's safety, security, and compliance requirements before deployment.

clawhub.json

{
  "emoji": "🔮",
  "primaryEnv": "SIMMER_API_KEY",
  "requires": {
    "env": [
      "SIMMER_API_KEY"
    ],
    "pip": [
      "simmer-sdk"
    ]
  },
  "envVars": [
    {
      "name": "SIMMER_API_KEY",
      "required": true,
      "description": "Your Simmer SDK API key. Created during agent registration; recoverable from simmer.markets/dashboard."
    },
    {
      "name": "TRADING_VENUE",
      "required": false,
      "description": "Set to 'polymarket' or 'kalshi' to default real-money trades to that venue. Omit (or set 'sim') for paper trading at real prices."
    }
  ],
  "cron": null,
  "autostart": false,
  "automaton": {
    "managed": false,
    "entrypoint": null
  }
}

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