polymarket-guard-mcp

MCPcommunity

v0.1.2UnknownMITUpdated 3mo agonpm GitHub

MCP server for Polymarket prediction markets — buy/sell positions with USDC pay-per-call billing via LemonCake

Works in

ClaudeCursorCopilotGemini

Inferred from the transports this listing declares (stdio). A client not listed here hasn’t been ruled out — it just isn’t something Forge can confirm.

Automatically indexed from public sources. Not yet verified by the developer on Forge.Claim this listing →

37Downloads/wk

3mo agoLast update

Reads these credentials

POLYMARKET_PRIVATE_KEYAPI keyoptional
Polygon wallet private key for trading. Leave unset for read-only mode.
LEMON_CAKE_BUYER_JWTAPI keyoptional
LemonCake Buyer JWT for pay-per-call billing.

Declared by the author in the official MCP registry. Forge does not store, broker, or ever see these values — the config below is scaffolded with placeholders you fill in locally.

Package

AuthorUnknown

LicenseMIT

Version0.1.2

Sourcenpm+mcp-registry

npmpolymarket-guard-mcp

GitHubevidai/lemon-cake

SBOMCycloneDX 1.6 ↓

Trust Status

B

60/100Good

✓Listed in Forge index+10/10

—Publisher identity verified+0/20

→ Publisher: run `forge publish` from the package repo to claim ownership

—Ed25519 publish signature+0/5

→ Included automatically when the publisher runs `forge publish`

—Domain verification+0/5

→ Publisher: host /.well-known/forge.json on the package homepage with { "publisher": "<github-login>" }

—npm Trusted Publishing (Sigstore)+0/5

→ Publish from GitHub Actions with --provenance so the attestation binds this package to this repo

—npm maintainer match+0/5

→ Earned once your identity is verified above and that login is an npm maintainer of this package

✓CVE scan · clean+30/30

✓Static analysis · clean+20/20

Paste into Claude Code, Cursor, or any AI assistant to fix all gaps

StatusCommunity-indexed

PublisherUnverified

SignatureUnsigned

Domain—

Provenance—

Dependencies✓ 60 resolved+ · none vulnerable

Tool surface11 tools · none privileged

Security scan✓ Cleanv0.1.2 · 2d agoHow well does this scan work?

EvalsNone

IndexedAug 26, 2026

Verification confirms publisher identity (repo ownership), not code safety. The security scan covers known CVEs and suspicious install scripts.

Tools

11 tools · none privileged

Statically extracted from the published packagev0.1.2 · 2d ago

Read out of the source npm actually ships, at scan time. The package was never executed. Tools registered dynamically at runtime, or hidden inside bundled or minified code, can be missed — so this is a floor on the tool surface, not a complete census of it.

Filter toolsPrivileged only

list_marketsList active Polymarket prediction markets. Returns market titles, condition IDs, token IDs, volume, and YES/NO prices. Free — no billing.

List active Polymarket prediction markets. Returns market titles, condition IDs, token IDs, volume, and YES/NO prices. Free — no billing.

No input schema was published for this tool.

search_marketsSearch Polymarket markets by keyword. Searches market titles and descriptions. Free — no billing.

Search Polymarket markets by keyword. Searches market titles and descriptions. Free — no billing.

No input schema was published for this tool.

get_marketGet full details for a single Polymarket market by its condition ID or slug. Includes resolution criteria, outcomes, current prices, and volume. Free — no billing.

Get full details for a single Polymarket market by its condition ID or slug. Includes resolution criteria, outcomes, current prices, and volume. Free — no billing.

No input schema was published for this tool.

get_order_bookGet the live order book (bids and asks) for a Polymarket market token. Use token_id from list_markets or get_market. Free — no billing.

Get the live order book (bids and asks) for a Polymarket market token. Use token_id from list_markets or get_market. Free — no billing.

No input schema was published for this tool.

get_positionsGet your current open positions on Polymarket: market titles, outcome tokens, shares held, cost basis, and current P&L. Requires POLYMARKET_PRIVATE_KEY. Billed at $0.05 USDC via LemonCake.

Get your current open positions on Polymarket: market titles, outcome tokens, shares held, cost basis, and current P&L. Requires POLYMARKET_PRIVATE_KEY. Billed at $0.05 USDC via LemonCake.

No input schema was published for this tool.

get_balanceGet your USDC balance and token allowances on Polymarket's Polygon contracts. Requires POLYMARKET_PRIVATE_KEY. Billed at $0.05 USDC via LemonCake.

Get your USDC balance and token allowances on Polymarket's Polygon contracts. Requires POLYMARKET_PRIVATE_KEY. Billed at $0.05 USDC via LemonCake.

No input schema was published for this tool.

get_trade_historyGet your past trades on Polymarket: order IDs, market, outcome, price, size, timestamp. Requires POLYMARKET_PRIVATE_KEY. Billed at $0.05 USDC via LemonCake.

Get your past trades on Polymarket: order IDs, market, outcome, price, size, timestamp. Requires POLYMARKET_PRIVATE_KEY. Billed at $0.05 USDC via LemonCake.

No input schema was published for this tool.

place_market_orderBuy or sell outcome shares at market price on Polymarket. USDC cost is calculated at the current best ask/bid. Requires POLYMARKET_PRIVATE_KEY. Billed at $0.10 USDC via LemonCake.

Buy or sell outcome shares at market price on Polymarket. USDC cost is calculated at the current best ask/bid. Requires POLYMARKET_PRIVATE_KEY. Billed at $0.10 USDC via LemonCake.

No input schema was published for this tool.

place_limit_orderPlace a limit order to buy or sell outcome shares at a specific price on Polymarket CLOB. Requires POLYMARKET_PRIVATE_KEY. Billed at $0.10 USDC via LemonCake.

Place a limit order to buy or sell outcome shares at a specific price on Polymarket CLOB. Requires POLYMARKET_PRIVATE_KEY. Billed at $0.10 USDC via LemonCake.

No input schema was published for this tool.

cancel_orderCancel an open limit order by order ID. Requires POLYMARKET_PRIVATE_KEY. Billed at $0.10 USDC via LemonCake.

Cancel an open limit order by order ID. Requires POLYMARKET_PRIVATE_KEY. Billed at $0.10 USDC via LemonCake.

No input schema was published for this tool.

redeem_positionsClaim winnings from resolved Polymarket markets. Redeems outcome token shares for USDC if the market resolved in your favor. Requires POLYMARKET_PRIVATE_KEY. Billed at $0.10 USDC via LemonCake.

Claim winnings from resolved Polymarket markets. Redeems outcome token shares for USDC if the market resolved in your favor. Requires POLYMARKET_PRIVATE_KEY. Billed at $0.10 USDC via LemonCake.

No input schema was published for this tool.

11 of 11 tools published a description.

Tool names and descriptions are written by the publisher and shown verbatim as inert text. They are the strings an MCP client passes to a model, so Forge scans them for prompt-injection patterns — any finding appears with the security scan above. “Privileged” is a keyword match on the tool name, not an audit of what the tool does: a benign-sounding name can still do anything.

About

MCP server for Polymarket prediction markets — buy/sell positions with USDC pay-per-call billing via LemonCake

Keywords

mcpmodel-context-protocolpolymarketprediction-marketsusdcdefipolygonpay-per-calllemoncakeclobai-agent

Alternatives

Comparing tool surfaces…

Tools exposed

11 tools · none privileged · observed 2026-08-31 by static extraction. A tool surface is what one scan read on one day, not a live capability list.

Linked names open Forge’s index of every entry observed exposing that tool. Browse all indexed tools.

Dependency tree

What one Forge scan resolved from npm metadata on 2026-08-31 — observed resolution, not a publisher declaration.

60 packages resolved · 3 direct · none carrying advisories Resolution stops at depth 4 and 60 packages.

zod3.25.76
@lemon-cake/mcp-sdk0.1.0
@modelcontextprotocol/sdk1.30.017 dependencies
- ajv8.20.04 dependencies
  - fast-deep-equal3.1.3
  - fast-uri3.1.6
  - json-schema-traverse1.0.0
  - require-from-string2.0.2
- zod4.5.4
- cors2.8.6+2 not drawn
- hono4.13.5
- jose6.2.10
- express5.2.1+27 not drawn1 dependency
  - content-type1.0.5
- raw-body3.0.2+4 not drawn
- ajv-formats3.0.11 dependency
  - ajv8.20.0shown above
- cross-spawn7.0.6+3 not drawn
- eventsource3.0.71 dependency
  - eventsource-parser3.1.1
- content-type1.0.5shown above
- pkce-challenge5.0.1
- @hono/node-server2.1.1
- json-schema-typed8.0.2
- eventsource-parser3.1.1shown above
- express-rate-limit8.7.0+2 not drawn
- zod-to-json-schema3.25.2

The crawl stopped at the depth-4 limit. Anything below that level was never resolved.

The crawl stopped at the 60-package limit. The rest of the tree was never resolved.

36 more resolved packages are not drawn here (display cap: 24). Every dependency carrying an advisory is drawn regardless of the cap. Full inventory (CycloneDX SBOM)

Declared but not resolved

55 declared dependencies never landed in the tree. They are missing from Forge's resolution, not from the package.

package cap reached: 50
below the depth cap: 5

es-define-property ^1.0.1 — required by qs@6.16.0package cap reached
wrappy 1 — required by once@1.4.0package cap reached
http-errors ^2.0.1 — required by send@1.2.1package cap reached
mime-types ^3.0.2 — required by send@1.2.1package cap reached
ms ^2.1.3 — required by send@1.2.1package cap reached
on-finished ^2.4.1 — required by send@1.2.1package cap reached
range-parser ^1.2.1 — required by send@1.2.1package cap reached
statuses ^2.0.2 — required by send@1.2.1package cap reached
ms ^2.1.3 — required by debug@4.4.3package cap reached
debug ^4.4.0 — required by router@2.2.0package cap reached
depd ^2.0.0 — required by router@2.2.0package cap reached
is-promise ^4.0.0 — required by router@2.2.0package cap reached

+43 more not listed. The counts by reason above cover all of them.

Not followed: peerDependencies. This tree covers runtime dependencies only, so anything those pull in was never resolved.