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Agent skill

Prediction Market Odds

by gooseworks-ai in gooseworks-ai/goose-skills

Get prediction market odds and prices from Polymarket and Kalshi

MITAuto-check passedBusiness, Finance & HR

Install Prediction Market Odds

skills CLI
$ npx skills add gooseworks-ai/goose-skills --skill prediction-market-odds -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install gooseworks-ai/goose-skills prediction-market-odds --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/gooseworks-ai/goose-skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/research-tools/capabilities/prediction-market-odds .claude/skills/prediction-market-odds && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
prediction-market-odds
GitHub stars
1.2k
Used in
1 other repo
Token cost
~1.6k tokens
SKILL.md length
381 words
Files
2
Skills in repo
273
Repo updated
First seen
Licence
MIT

At a glance

Get prediction market odds and prices from Polymarket and Kalshi

  • Business, Finance & HR work in your project
  • SKILL.md covers Setup, When to Use, How It Works and Usage, plus 6 more sections
  • Calls curl, python3 and npx; reaches api.gooseworks.ai and api.orth.sh; needs GOOSEWORKS_API_KEY

What it does

Prediction Market Odds is an agent skill from gooseworks-ai/goose-skills. Get prediction market odds and prices from Polymarket and Kalshi

Its SKILL.md is about 1.6k tokens, which your agent loads only when the skill is triggered. The skill folder holds 1 other file (for example `skill.meta.json`).

It sits in Business, Finance & HR. It works with Polymarket and Kalshi. The repository describes itself as: Library of Growth & GTM skills + data APIs for Claude Code, Codex, Cursor to run ads, social, content, lead gen, seo and data scraping. The licence is MIT.

When your agent uses it

  • Business, Finance & HR work in your project

Example prompts

  • “/prediction-market-odds”

Requirements

  • Python 3
  • Node.js
  • A credential in GOOSEWORKS_API_KEY

What it can do on your machine

Read from SKILL.md and the folder at commit c650c6d. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    Shell commands in SKILL.md call:

    • curl
    • python3
    • npx

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    Hosts in commands or code, which the agent is likely to contact:

    • api.gooseworks.ai
    • api.orth.sh

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names these keys or tokens, usually read from environment variables:

    • GOOSEWORKS_API_KEY

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Prediction Market Odds loads about 1.6k tokens when it runs. Until then it costs about 22 tokens; SKILL.md has 381 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~22
When it runs · the whole SKILL.md, loaded when a task matches
~1.6k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from gooseworks-ai/goose-skills at commit c650c6d, republished under its MIT licence (© gooseworks-ai). 381 words, ~1,586 tokens.

Download SKILL.mdSave it as .claude/skills/prediction-market-odds/SKILL.md (or your agent's skills folder). This skill also uses 1 other file; get the full folder from GitHub.
name
prediction-market-odds
description
Get prediction market odds and prices from Polymarket and Kalshi
source
orthogonal

Prediction Market Odds

Setup

Read your credentials from ~/.gooseworks/credentials.json:

bash
export GOOSEWORKS_API_KEY=$(python3 -c "import json;print(json.load(open('$HOME/.gooseworks/credentials.json'))['api_key'])")
export GOOSEWORKS_API_BASE=$(python3 -c "import json;print(json.load(open('$HOME/.gooseworks/credentials.json')).get('api_base','https://api.gooseworks.ai'))")

If ~/.gooseworks/credentials.json does not exist, tell the user to run: npx gooseworks login

All endpoints use Bearer auth: -H "Authorization: Bearer $GOOSEWORKS_API_KEY"

Get current odds, prices, and market data from prediction markets like Polymarket and Kalshi.

When to Use

  • User asks about prediction market odds
  • User wants to know probability of an event
  • User asks "what are the odds of [event]?"
  • Research on market sentiment
  • Election or event probability checks

How It Works

Uses the Dome API to aggregate prediction market data from Polymarket and Kalshi.

Usage

Get Polymarket Markets
bash
curl -s -X POST $GOOSEWORKS_API_BASE/v1/proxy/orthogonal/run \
  -H "Authorization: Bearer $GOOSEWORKS_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"api":"dome","path":"/polymarket/markets","query":{"status":"open"}}'
<details>
<summary>curl equivalent</summary>
bash
curl -X POST "https://api.orth.sh/v1/run" \

  -H "Content-Type: application/json" \
  -d '{"api":"dome","path":"/polymarket/markets"}'
</details>
Search Markets
bash
curl -s -X POST $GOOSEWORKS_API_BASE/v1/proxy/orthogonal/run \
  -H "Authorization: Bearer $GOOSEWORKS_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"api":"dome","path":"/polymarket/markets","query":{"search":"election"}}'
Get Kalshi Markets
bash
curl -s -X POST $GOOSEWORKS_API_BASE/v1/proxy/orthogonal/run \
  -H "Authorization: Bearer $GOOSEWORKS_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"api":"dome","path":"/kalshi/markets"}'
Get Polymarket Activity
bash
curl -s -X POST $GOOSEWORKS_API_BASE/v1/proxy/orthogonal/run \
  -H "Authorization: Bearer $GOOSEWORKS_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"api":"dome","path":"/polymarket/activity"}'
Get Market Orders
bash
curl -s -X POST $GOOSEWORKS_API_BASE/v1/proxy/orthogonal/run \
  -H "Authorization: Bearer $GOOSEWORKS_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"api":"dome","path":"/polymarket/orders"}'
Get Sports Markets
bash
curl -s -X POST $GOOSEWORKS_API_BASE/v1/proxy/orthogonal/run \
  -H "Authorization: Bearer $GOOSEWORKS_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"api":"dome","path":"/matching-markets/sports"}'
Get Specific Sport Markets
bash
curl -s -X POST $GOOSEWORKS_API_BASE/v1/proxy/orthogonal/run \
  -H "Authorization: Bearer $GOOSEWORKS_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"api":"dome","path":"/matching-markets/sports/nba"}'

Supported Sports

  • nba
  • nfl
  • mlb
  • nhl
  • soccer
  • tennis

Response

Markets Response (/polymarket/markets, /kalshi/markets)

Returns markets array:

  • title (string) - Market question (e.g., "Will Trump nationalize elections?")
  • market_slug (string) - URL-friendly identifier
  • condition_id (string) - Blockchain condition ID
  • start_time / end_time (integer) - Unix timestamps
  • completed_time (integer|null) - Null if still open
  • tags (array) - Category tags (e.g., ["politics", "us election"])
  • volume_1_week / volume_1_month / volume_1_year / volume_total (number) - Trading volume in USD
  • side_a / side_b (object) - id and label (typically "Yes"/"No")
  • winning_side (object|null) - Null if unresolved
  • image (string) - Market thumbnail URL
Show full SKILL.md (180 more words)Show less
Activity Response (/polymarket/activity)

Returns activities array:

  • title (string) - Market title
  • market_slug (string) - Market identifier
  • side (string) - Trade side: BUY, SELL, or MERGE
  • shares (integer) - Raw share amount
  • shares_normalized (number) - Human-readable share amount
  • price (number) - Trade price (0-1, represents probability)
  • timestamp (integer) - Unix timestamp of the trade
  • user (string) - Wallet address of the trader
  • tx_hash (string) - Blockchain transaction hash

Examples

User: "What are the odds on Polymarket right now?"

bash
curl -s -X POST $GOOSEWORKS_API_BASE/v1/proxy/orthogonal/run \
  -H "Authorization: Bearer $GOOSEWORKS_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"api":"dome","path":"/polymarket/markets","query":{"status":"open"}}'

User: "Show me Kalshi prediction markets"

bash
curl -s -X POST $GOOSEWORKS_API_BASE/v1/proxy/orthogonal/run \
  -H "Authorization: Bearer $GOOSEWORKS_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"api":"dome","path":"/kalshi/markets"}'

User: "What's happening in prediction markets?"

bash
curl -s -X POST $GOOSEWORKS_API_BASE/v1/proxy/orthogonal/run \
  -H "Authorization: Bearer $GOOSEWORKS_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"api":"dome","path":"/polymarket/activity"}'

User: "Any sports betting markets?"

bash
curl -s -X POST $GOOSEWORKS_API_BASE/v1/proxy/orthogonal/run \
  -H "Authorization: Bearer $GOOSEWORKS_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"api":"dome","path":"/matching-markets/sports"}'

Understanding Odds

  • Prices are shown as decimals (0.65 = 65% probability)
  • "Yes" price = probability market thinks event will happen
  • Higher volume = more confidence/liquidity
  • Prices change based on trading activity

Error Handling

  • 400 - search requires status parameter (open or closed) — always include both
  • 401 - Invalid API key
  • 429 - Rate limit — wait and retry
  • Empty markets array means no markets match the search term
  • Activity endpoint returns recent trades globally — no filters required

Tips

  • Check multiple markets for the same event
  • Volume indicates market confidence
  • Recent activity shows sentiment shifts
  • Polymarket focuses on politics/world events, Kalshi on finance/weather

© gooseworks-ai, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 1 other file in skills/research-tools/capabilities/prediction-market-odds of gooseworks-ai/goose-skills.

  • SKILL.md
  • skill.meta.json

Open the folder on GitHubat commit c650c6d

Used in 1 other repository

We found 1 copy of this SKILL.md (exact, near-identical or edited) in other folders, from 1 other GitHub owner. This page covers the copy in gooseworks-ai/goose-skills, which our catalogue first saw on October 9, 2026.

Compare with similar skills

Prediction Market Odds next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Prediction Market Odds compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Prediction Market Odds this skillgooseworks-ai/goose-skills1.2k1 repos~1.6kAutomated safety check: PassMIT
Digital Oraclekomako-workshop/digital-oracle878—~5.9kAutomated safety check: PassMIT
Dr Manhattanguzus/dr-manhattan204—~2kAutomated safety check: PassApache-2.0
Polymarket Tennislivetennisapi/livetennisapi-mcp152—~3kAutomated safety check: PassMIT
Feedsalsk1992/CloddsBot3k—~1.8kAutomated safety check: PassMIT
Portfolio Syncalsk1992/CloddsBot3k—~3.6kAutomated safety check: PassMIT

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Works with

Categories

Questions about Prediction Market Odds

What does Prediction Market Odds do?

Get prediction market odds and prices from Polymarket and Kalshi. Prediction Market Odds is an agent skill from gooseworks-ai/goose-skills.

When should I use Prediction Market Odds?

Prediction Market Odds fits situations like: business, Finance & HR work in your project.

How do I install Prediction Market Odds in Claude Code?

Run `npx skills add gooseworks-ai/goose-skills --skill prediction-market-odds -a claude-code`. Or copy the skill folder (skills/research-tools/capabilities/prediction-market-odds in gooseworks-ai/goose-skills) into .claude/skills/prediction-market-odds in your project. Claude Code loads it when a task matches its description.

How do I install Prediction Market Odds in Codex?

Run `npx skills add gooseworks-ai/goose-skills --skill prediction-market-odds -a codex`. Or copy the skill folder (skills/research-tools/capabilities/prediction-market-odds in gooseworks-ai/goose-skills) into .agents/skills/prediction-market-odds in your project. Codex loads it when a task matches its description.

Can I use Prediction Market Odds in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add gooseworks-ai/goose-skills --skill prediction-market-odds -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/prediction-market-odds, .gemini/skills/prediction-market-odds, .github/skills/prediction-market-odds and .opencode/skills/prediction-market-odds in your project.

What does Prediction Market Odds need to run?

Going by SKILL.md and its folder, Prediction Market Odds needs the command-line tools its instructions call (curl, python3 and npx) and credentials named GOOSEWORKS_API_KEY. Our summary lists: Python 3; Node.js; A credential in GOOSEWORKS_API_KEY.

Does Prediction Market Odds access the network?

SKILL.md names 2 domains. In commands or code: api.gooseworks.ai and api.orth.sh; the agent is likely to contact these when it follows the instructions. This is read from the text; nothing was executed.

Is Prediction Market Odds safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Prediction Market Odds use?

Prediction Market Odds is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Prediction Market Odds use?

About 1.6k tokens (SKILL.md is roughly 6.3k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Prediction Market Odds?

Skills that share tags, products or a category with Prediction Market Odds: Digital Oracle (komako-workshop/digital-oracle, 878 stars), Dr Manhattan (guzus/dr-manhattan, 204 stars), Polymarket Tennis (livetennisapi/livetennisapi-mcp, 152 stars) and Feeds (alsk1992/CloddsBot, 3k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Prediction Market Odds?

gooseworks-ai (a GitHub organization) maintains it in gooseworks-ai/goose-skills, which has 1,240 GitHub stars. The repository holds 273 skills in this directory. The repository was last updated on October 8, 2026.

Source: gooseworks-ai/goose-skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.