What is kalshi-trading?

Instructions for using Kalshi trading tools. Kalshi is a market where people trade contracts based on whether future events will happen.

Viewing balances, markets, prices, orders, positions, and order books, plus guiding an explicitly approved trade through market, side, size, and price confirmation.

They separate safe, read-only market checks from trades that change an account, and require confirmation before placing an order.

kalshi-trading — Skill for Claude Code and Codex by evan-thedev/kalshi

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent

npx skills add evan-thedev/kalshi --skill kalshi-trading

Clone the repo

git clone --depth 1 https://github.com/evan-thedev/kalshi

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/skills/evan-thedev/kalshi/kalshi-trading/github.svg)](https://agentmods.dev/skills/evan-thedev/kalshi/kalshi-trading)

Your own site

<a href="https://agentmods.dev/skills/evan-thedev/kalshi/kalshi-trading"><img src="https://agentmods.dev/badge/skills/evan-thedev/kalshi/kalshi-trading/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/skills/evan-thedev/kalshi/kalshi-trading"><img src="https://agentmods.dev/badge/skills/evan-thedev/kalshi/kalshi-trading.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 0 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 883 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5.1	$0.00000	$0.00883
Opus 5.5	$0.00000	$0.00353
Sonnet 5.5	$0.00000	$0.00177
Haiku 4.5	$0.00000	$0.00088

Measured 2mo ago against content hash 4e00eab48616, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

kalshi-trading scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2mo ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

skills/kalshi-trading/SKILL.md · 88 lines

How it starts

The opening of the file, as written. The whole thing — 88 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Kalshi Trading Skill

ALWAYS read this file before using any Kalshi tools.

Trading Safety Rules

Read-Only Tools (Safe to Use)

These tools are safe to call any time:

kalshi_get_balance - Check account balance
kalshi_list_markets - Browse available markets
kalshi_get_market - Get details about a specific market
kalshi_get_orderbook - View current orderbook
kalshi_get_positions - View current positions
kalshi_list_orders - View current orders

Write Tools (Require User Approval)

NEVER use these tools unless the user explicitly requests a specific trade:

kalshi_create_order - Place an order
kalshi_cancel_order - Cancel an order

Before Placing ANY Order

When the user asks to place a trade, you MUST:

Confirm the market - Show the user the market details (ticker, title, current prices)
Confirm the side - Ask: "You want to buy YES at X?" or "You want to sell YES (buy NO) at Y?"
Confirm the size - Verify the number of contracts
Confirm the price - Show the exact price in dollars (0.01 to 0.99 format)
Wait for explicit approval - User must say "yes", "confirm", or similar

Trading Terminology

Side: Use bid to buy YES, use ask to sell YES
Price: Fixed-point dollar string (e.g., "0.5600" means 56 cents)
Count: Fixed-point contract count (e.g., "10.00" means 10 contracts)
Ticker: Market identifier (e.g., "HIGHNY-24JAN01-T60")

Never Invent Prices or Fills

NEVER make up or estimate fill prices
ALWAYS use the actual orderbook prices shown by kalshi_get_orderbook
If the user wants market orders, explain they need to specify a limit price
Show the current best bid/ask before any order

Demo vs Production

Demo: https://external-api.demo.kalshi.co (for testing, fake money)
Production: https://external-api.kalshi.com (real money)
When testing the plugin, prefer using the demo environment
Make sure the user knows which environment they're using

Read the full file on GitHub · 88 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

2mo ago First seen · 88 lines · 0 tokens per session scan A 4e00eab48616

Subscribe to this mod's changes

kalshi-trading is a skill published in the GitHub repository evan-thedev/kalshi (0 stars, last pushed 2mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 883 tokens. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

Finance and fintech

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