Penumbra MCP Server (bmorphism/penumbra-mcp) is an MCP server listed on the M8ven Trust Index. It scores 47 out of 100, grade D. It declares 5 tools. No publisher has claimed this listing.

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D
Caution
47/100

Penumbra MCP Server

MCP server for interacting with Penumbra blockchain - providing privacy-preserving tools for chain interaction

→ bmorphism/penumbra-mcp· listed on mcp_so

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

bmorphism

Source: mcp.so

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Install from

mcp.sonot scored here

The grade above is for the source repository. Registries can serve a different version, so we mark the ones we were not able to read.

// key findings
⚠️
Known vulnerabilities in dependencies: 14 high
Affects packages this MCP installs at runtime. Upgrade or remove the affected dependency.
✅
No credential exfiltration, no sensitive file access, no obfuscation
Static analysis found nothing flowing your secrets to unexpected places.
// known CVEs in dependencies14 high5 medium11 low

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

high@modelcontextprotocol/sdk@0.6.0GHSA-w48q-cv73-mx4w

Model Context Protocol (MCP) TypeScript SDK does not enable DNS rebinding protection by default

highaxios@1.7.9GHSA-35jp-ww65-95wh

axios Vulnerable to Full Man-in-the-Middle via Prototype Pollution Gadget in `config.proxy`

highaxios@1.7.9GHSA-3g43-6gmg-66jw

axios Vulnerable to Credential Theft and Response Hijacking via Prototype Pollution Gadget in Config Merge

highaxios@1.7.9GHSA-43fc-jf86-j433

Axios is Vulnerable to Denial of Service via __proto__ Key in mergeConfig

highaxios@1.7.9GHSA-4hjh-wcwx-xvwj

Axios is vulnerable to DoS attack through lack of data size check

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.
configPENUMBRA_BLOCK_TIMEBlock time in milliseconds (default: 6000)
configPENUMBRA_CHAIN_IDChain ID (default: penumbra-1)
configPENUMBRA_DEX_BATCH_INTERVALBatch auction interval in milliseconds (default: 60000)
configPENUMBRA_DEX_MAX_PRICE_IMPACTMaximum price impact as decimal (default: 0.05)
configPENUMBRA_DEX_MIN_LIQUIDITYMinimum liquidity amount (default: 1000)
configPENUMBRA_EPOCH_DURATIONNumber of blocks per epoch (default: 100)
configPENUMBRA_GOVERNANCE_MIN_DEPOSITMinimum proposal deposit amount (default: 100000)
configPENUMBRA_GOVERNANCE_VOTING_PERIODVoting period duration in milliseconds (default: 1209600000 - 14 days)
configPENUMBRA_NETWORKNetwork to connect to (default: mainnet)
configPENUMBRA_NODE_URLURL of the Penumbra node (default: https://rpc.penumbra.zone)
configPENUMBRA_REQUEST_RETRIESNumber of request retries (default: 5)
configPENUMBRA_REQUEST_TIMEOUTHTTP request timeout in milliseconds (default: 30000)
// 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

5/5 tools missing one or more hints — get_validator_set (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); get_chain_status (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); get_transaction (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint), +2 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.

License file

No license file

Add a LICENSE file (MIT, Apache-2.0, etc.).

Tests exist

No test files found

Add tests that exercise each declared tool.

Production dependencies are patched

0 critical, 14 high severity in production deps — @modelcontextprotocol/sdk@0.6.0 (high), axios@1.7.9 (high)

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

Domain consistency

npm scope @timeheater doesn't match GitHub owner bmorphism

Use the same org name across GitHub, npm, and your homepage so users can verify the publisher.

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 6 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
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commit: 375d1c8ada904fe2e45d25f4d546f9b4876e44d1
code hash: 5d8eab71c025e78320dd3762bfeb3503bd28a0ce835b6065734bebfa363af616
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