How do I install the Polymarket skill?

Run npx skillmds@latest add jiayaoqijia/polymarket in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

Is Polymarket safe to use?

This skill has not completed SkillMD's automated safety review yet. SkillMD never runs a skill's scripts for you; review the SKILL.md before installing.

Which AI agents work with Polymarket?

This skill is tagged as working with Claude Code, Claude.ai, OpenAI Codex. SKILL.md is an open format, so most agents that read a skills directory can load it too.

Is Polymarket free to use?

Yes. Installing skills from SkillMD is free, and the skill stays under its author's original license.

Who published Polymarket?

jiayaoqijia (@jiayaoqijia) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Polymarket by jiayaoqijia — Agent Skill

Name: Polymarket
Author: jiayaoqijia

Polymarket

Read live Polymarket prediction-market data via the ChainGPT plugin. Markets list / market details / orderbook / recent trades on Polygon mainnet. Ties into ChainGPT's Foresight AI / PredictFi surface. Read-only in v1.6 — signed order placement (Polymarket CLOB / EIP-712) is a follow-up. Triggers: polymarket, prediction market, betting odds, election odds, will X happen, Foresight AI.

jiayaoqijia be8f68f 4 files · 6.8 KB Updated Sep 17, 2026

File contents

ChainGPT Polymarket Skill

You read live Polymarket prediction-market data on behalf of the user. v1.6 is read-only. Order placement (signed CLOB orders against the Polymarket exchange) is intentionally deferred to a follow-up.

This skill is the on-chain counterpart of ChainGPT's Foresight AI / PredictFi product surface — same domain (event-outcome markets), but live mainnet data rather than ChainGPT-curated commentary.

What this skill can do today

Tool	Purpose
`chaingpt_pm_markets`	Discover markets sorted by 24h volume, with full-text search
`chaingpt_pm_market`	Detail on one market by slug or condition id — outcomes, prices, token ids, volume
`chaingpt_pm_orderbook`	L2 orderbook for one outcome token
`chaingpt_pm_trades`	Recent fills on one outcome token

Workflow: "what is the market saying about X?"

chaingpt_pm_markets search="<topic>" limit=5
       │  (pick the most-liquid relevant one)
       ▼
chaingpt_pm_market slug="<from above>"
       │  (read YES + NO token ids and current implied probabilities)
       ▼
chaingpt_pm_orderbook tokenId="<yes-token-id>"
       │  (confirm there's actual depth at the touch — odds without size are vibes)
       ▼
chaingpt_pm_trades tokenId="<yes-token-id>"
       │  (last 20 fills tell you which side is paying up)

Surfacing what matters

When summarizing a market, lead with:

The question itself
Current implied probability (outcomePrices[0] for YES)
24h volume (is anyone actually trading this?)
Days to resolution
Top-of-book spread + depth (is the price tradeable in size?)

A YES price of 75% with $50 of size at the touch and $5/day volume is meaningless. A YES price of 75% with $50k at the touch and $1M/day volume is a real consensus.

What this skill does NOT do (yet)

Place orders — coming in a follow-up. Will return EIP-712 typed data for the user's wallet to sign against the Polymarket exchange.
Cancel orders — same constraint.
Resolve a held position (redeem after market closes) — same constraint.
Multi-outcome markets (categorical, not just YES/NO) — currently surfaced as outcome arrays, but UX is YES/NO-biased; will improve.

When to combine with other skills

For ChainGPT's commentary layer (PredictFi / Foresight AI summary), check the existing chaingpt_news_fetch filtered to "Prediction" categories.
For wallet-level USDC balance on Polygon before betting — chaingpt_wallet_balances chains=["polygon"].
For risk-checking the Polymarket exchange contract or USDC.e — chaingpt_risk_contract_source + chaingpt_risk_token.

Credit accounting

All Polymarket reads cost 0 ChainGPT credits — Gamma + CLOB APIs are free. The credit funnel for this skill comes from the upstream research + news calls users make around prediction-market decisions.

---name: polymarketdescription: Read live Polymarket prediction-market data via the ChainGPT plugin. Markets list / market details / orderbook / recent trades on Polygon mainnet. Ties into ChainGPT's Foresight AI / PredictFi surface. Read-only in v1.6 — signed order placement (Polymarket CLOB / EIP-712) is a follow-up. Triggers: polymarket, prediction market, betting odds, election odds, will X happen, Foresight AI.---# ChainGPT Polymarket SkillYou read live Polymarket prediction-market data on behalf of the user. **v1.6 is read-only.** Order placement (signed CLOB orders against the Polymarket exchange) is intentionally deferred to a follow-up.This skill is the on-chain counterpart of ChainGPT's **Foresight AI / PredictFi** product surface — same domain (event-outcome markets), but live mainnet data rather than ChainGPT-curated commentary.## What this skill can do today| Tool | Purpose ||---|---|| `chaingpt_pm_markets` | Discover markets sorted by 24h volume, with full-text search || `chaingpt_pm_market` | Detail on one market by slug or condition id — outcomes, prices, token ids, volume || `chaingpt_pm_orderbook` | L2 orderbook for one outcome token || `chaingpt_pm_trades` | Recent fills on one outcome token |## Workflow: "what is the market saying about X?"```textchaingpt_pm_markets search="<topic>" limit=5 │ (pick the most-liquid relevant one) ▼chaingpt_pm_market slug="<from above>" │ (read YES + NO token ids and current implied probabilities) ▼chaingpt_pm_orderbook tokenId="<yes-token-id>" │ (confirm there's actual depth at the touch — odds without size are vibes) ▼chaingpt_pm_trades tokenId="<yes-token-id>" │ (last 20 fills tell you which side is paying up)```## Surfacing what mattersWhen summarizing a market, lead with:1. The question itself2. Current implied probability (`outcomePrices[0]` for YES)3. 24h volume (is anyone actually trading this?)4. Days to resolution5. Top-of-book spread + depth (is the price tradeable in size?)A YES price of 75% with $50 of size at the touch and $5/day volume is meaningless. A YES price of 75% with $50k at the touch and $1M/day volume is a real consensus.## What this skill does NOT do (yet)- **Place orders** — coming in a follow-up. Will return EIP-712 typed data for the user's wallet to sign against the Polymarket exchange.- **Cancel orders** — same constraint.- **Resolve a held position** (redeem after market closes) — same constraint.- **Multi-outcome markets** (categorical, not just YES/NO) — currently surfaced as outcome arrays, but UX is YES/NO-biased; will improve.## When to combine with other skills- For ChainGPT's *commentary* layer (PredictFi / Foresight AI summary), check the existing `chaingpt_news_fetch` filtered to "Prediction" categories.- For wallet-level USDC balance on Polygon before betting — `chaingpt_wallet_balances chains=["polygon"]`.- For risk-checking the Polymarket exchange contract or USDC.e — `chaingpt_risk_contract_source` + `chaingpt_risk_token`.## Credit accountingAll Polymarket reads cost 0 ChainGPT credits — Gamma + CLOB APIs are free. The credit funnel for this skill comes from the upstream research + news calls users make around prediction-market decisions.

Frequently asked questions