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C
Caution
72/100
8 hours ago

Polymarket MCP Server

Enables AI agents to trade on Polymarket prediction markets via a self-hosted MCP server, supporting wallet management, order placement, position syncing, and gasless transactions on the Polygon network.

→ joinQuantish/polymarket-mcp· listed on glama

Caution. Specific findings reduced this grade. They are listed on the page. Grades reflect the full trust pyramid: code, verification depth, and reputation. New projects cap at C until adoption is earned.

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Who stands behind it

joinQuantish

Source: Glama

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// key findings
🚨
Secret credentials may flow to a network call
1 flow detected: QUANTISH_DISCOVERY_KEY. We can’t prove the destination matches the brand the credential belongs to.
⚠️
Known vulnerabilities in dependencies: 2 high
Affects packages this MCP installs at runtime. Upgrade or remove the affected dependency.
🔐
You'll be asked for 9 credentials: ADMIN_API_KEY, BOT_SIGNING_SECRET, DISCOVERY_ADMIN_SECRET, ENCRYPTION_KEY, MCP_API_KEY, POLY_BUILDER_API_KEY, POLY_BUILDER_SECRET, QUANTISH_DISCOVERY_KEY, SERPER_API_KEY
These are read from process.env at runtime. Make sure you trust where they’ll be sent.
// known CVEs in dependencies2 high1 low

Disclosed vulnerabilities in this server's declared npm dependencies (via OSV). Whether each is reachable depends on the installed versions.

high@modelcontextprotocol/sdk@1.25.1GHSA-345p-7cg4-v4c7

@modelcontextprotocol/sdk has cross-client data leak via shared server/transport instance reuse

high@modelcontextprotocol/sdk@1.25.1GHSA-8r9q-7v3j-jr4g

Anthropic's MCP TypeScript SDK has a ReDoS vulnerability

lowuuid@10.0.0GHSA-w5hq-g745-h8pq

uuid: Missing buffer bounds check in v3/v5/v6 when buf is provided

Depend on this server? Get alerted when its CVEs change.Watch this server free →
// environment variables
To run this server yourself, you supply these values. They go in your own MCP client configuration and stay on your machine. The secret label means the value is sensitive, not that the server mishandles it.
🔐 secretADMIN_API_KEY
configALLOWED_ORIGINS
🔐 secretBOT_SIGNING_SECRETNo Secret for trusted bot HMAC authentication
configCHAIN_ID
configCLOB_API_URL
configDATA_API_URL
🔐 secretDISCOVERY_ADMIN_SECRET
configENCRYPTION_IV
🔐 secretENCRYPTION_KEYYes 32-byte hex string for wallet encryption
🔐 secretMCP_API_KEY
configPOLYGON_RPC_URLYes Polygon RPC endpoint
🔐 secretPOLY_BUILDER_API_KEY
configPOLY_BUILDER_PASSPHRASE
🔐 secretPOLY_BUILDER_SECRET
🔐 secretQUANTISH_DISCOVERY_KEY
configQUANTISH_DISCOVERY_URL
configRELAYER_URL
🔐 secretSERPER_API_KEY
Deployment configuration, supplied by whoever hosts the server. Users are not asked for these.
deployDATABASE_URL
deployPORT
// quality suggestions

Tool annotations

No tools have read-only/destructive annotations

Add readOnlyHint or destructiveHint annotations to every tool so hosts can warn users before invoking.

All four hints declared on every tool

40/40 tools missing one or more hints — request_api_key (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); setup_wallet (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); reset_credentials (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint), +37 more. OpenAI's directory rejects tools where any of the four hints are missing or non-boolean.

For every tool, set all four hints (readOnlyHint, destructiveHint, idempotentHint, openWorldHint) to explicit true/false values that match the handler’s actual behaviour.

Tests exist

No test files found

Add tests that exercise each declared tool.

Secrets not logged

7 secret values sent to console.log

Redact or omit secret values from log output.

Production dependencies are patched

0 critical, 2 high severity in production deps — @modelcontextprotocol/sdk@1.25.1 (high), @modelcontextprotocol/sdk@1.25.1 (high)

Run npm audit fix, or upgrade the affected packages to a non-vulnerable version.

Claim the listing to review these findings one by one and send us a correction where you disagree, straight to the team. Claiming also means we tell you when the grade moves, and reach you first if we find anything urgent.

// full audit trail
The findings above are the summary. The full trail, every check we ran, each deduction, the network hosts observed and the dependency advisories, goes to verified publishers, along with an alert whenever a new one lands. Verified publishers can also review each finding and dispute it in one click. Publisher corrections have sharpened several of our checks this month, because the maintainer knows the codebase better than any scanner.
// improvement guidance — verified publishers only
We have 5 concrete improvements we can share with the publisher of this MCP. Each comes with specific guidance to raise the trust score.
// embed badge in your README
[![M8ven Verified](https://m8ven.ai/badge/mcp/joinquantish-polymarket-mcp-1brwu9?variant=verified)](https://m8ven.ai/mcp/joinquantish-polymarket-mcp-1brwu9)
Shows verification status without the grade. Want the grade badge instead? Remove ?variant=verified from the URL.
commit: 6851755215b9a1eac805ed430532deb7e89b6c90
code hash: 911e2165a6549a2cf68da77a1aec74ed45b2a306685d8ca2836962f27df111b5
verified: 8/19/2026, 9:26:12 AM
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