keryx (tang-vu/keryx) is an MCP server listed on the M8ven Trust Index. It scores 40 out of 100, grade D. It declares 2 tools. No publisher has claimed this listing.

D
Caution
40/100

keryx

Enables AI agents to pay creators for each citation via the x402 micropayment protocol, with automatic research, grounded answers, and on-chain settlement.

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.

How we verified

Code Verified⚡ Live Monitored: not connected

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Who stands behind it

tang-vu

Source: Glama

Is this your MCP?

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Install from

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.
2 tools verified — handlers match their declared behaviour
1 read-only tool verified — handlers contain no write/delete/exec
No credential exfiltration, no sensitive file access, no obfuscation
Static analysis found nothing flowing your secrets to unexpected places.
🔐
You'll be asked for 15 credentials: AGENT_FUNDER_PRIVATE_KEY, ANTHROPIC_API_KEY, BUYER_PRIVATE_KEY, CONTENT_MASTER_KEY, DEEPSEEK_API_KEY, DEPLOYER_PRIVATE_KEY, DISCORD_PUBLIC_KEY, JWT_SECRET, KERYX_BOT_KEY, KERYX_EMBEDDING_API_KEY, MIMO_API_KEY, OPENAI_API_KEY, SLACK_SIGNING_SECRET, TELEGRAM_BOT_TOKEN, TELEGRAM_WEBHOOK_SECRET
These are read from process.env at runtime. Make sure you trust where they’ll be sent.
// tools this server exposes2 tools

These names and descriptions are the publisher's own, read from the source code. We print them as written. Our assessment is the findings above, not this list.

research
keryx_status

Describe this MCP surface, its payment behavior, and the active caller tier.

// known CVEs in dependencies14 high9 medium8 low

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

highnext@16.1.6GHSA-267c-6grr-h53f

Next.js has a Middleware / Proxy bypass in App Router applications via segment-prefetch routes

highnext@16.1.6GHSA-26hh-7cqf-hhc6

Next.js has a Middleware / Proxy bypass in App Router applications via segment-prefetch routes - Incomplete Fix Follow-Up

highnext@16.1.6GHSA-36qx-fr4f-26g5

Next.js has a Middleware / Proxy bypass in Pages Router applications using i18n

highnext@16.1.6GHSA-492v-c6pp-mqqv

Next.js has a Middleware / Proxy bypass through dynamic route parameter injection

highnext@16.1.6GHSA-6gpp-xcg3-4w24

Next.js: Middleware / Proxy bypass in App Router applications using Turbopack and single locale

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.
🔐 secretAGENT_FUNDER_PRIVATE_KEYWith ANTHROPIC_API_KEY + + NEXT_PUBLIC_KERYX_REGISTRY_ADDRESS it
🔐 secretANTHROPIC_API_KEYWith + AGENT_FUNDER_PRIVATE_KEY + NEXT_PUBLIC_KERYX_REGISTRY_ADDRESS it
configBASE_URL
🔐 secretBUYER_PRIVATE_KEY
🔐 secretCONTENT_MASTER_KEY
🔐 secretDEEPSEEK_API_KEY
🔐 secretDEPLOYER_PRIVATE_KEY
🔐 secretDISCORD_PUBLIC_KEY
🔐 secretJWT_SECRET
configKERYX_A2A_FEE
configKERYX_A2A_MAX_BUDGET
configKERYX_ANON_MAX_BUDGET
🔐 secretKERYX_BOT_KEY
configKERYX_CITATION_POOL_RATIO
configKERYX_DEFAULT_BUDGET
configKERYX_DEFAULT_FETCH_PRICE
configKERYX_DEV_WALLETS
🔐 secretKERYX_EMBEDDING_API_KEY
configKERYX_EMBEDDING_BASE_URL
configKERYX_EMBEDDING_MODEL
configKERYX_ENGINE_ALT_MODEL_RATIO
configKERYX_ENGINE_GAP_RETRY_RATIO
configKERYX_EXTERNAL_DISCOVERY
configKERYX_EXTERNAL_DISCOVERY_LIMIT
configKERYX_GATEWAY_DEPOSIT
configKERYX_GATEWAY_MINTER
configKERYX_GATEWAY_MIN_AVAILABLE
configKERYX_GATEWAY_WALLET
configKERYX_IPFS_GATEWAY
configKERYX_LLM_BASE_URL
configKERYX_LLM_CIRCUIT_COOLDOWN_MS
configKERYX_LLM_CIRCUIT_FAILURES
configKERYX_LLM_MODEL
configKERYX_LLM_TIMEOUT_MS
configKERYX_MAX_CITATION_USDC
configKERYX_MAX_TIMEOUT_SECONDS
configKERYX_MCP_ALLOWED_ORIGINS
configKERYX_MIMO_BASE_URL
configKERYX_NETWORK
configKERYX_REEVALUATE_ROUNDS
configKERYX_REGISTRY_ADDRESS
configKERYX_REGISTRY_DEPLOY_BLOCK
configKERYX_REGISTRY_READ_ADDRESS
configKERYX_RPC_URL
configKERYX_RPC_WS_URL
configKERYX_SESSION_GRANT_TTL
configKERYX_SYNTHESIS_MODEL
configKERYX_USDC_ADDRESS
configKERYX_WITHDRAW_FEE_RESERVE
configKERYX_WITHDRAW_MAX_FEE
🔐 secretMIMO_API_KEY
configNEXT_DIST_DIR
🔐 secretOPENAI_API_KEY
configPINATA_JWT
configSELLER_ADDRESS
🔐 secretSLACK_SIGNING_SECRET
🔐 secretTELEGRAM_BOT_TOKEN
🔐 secretTELEGRAM_WEBHOOK_SECRET
Deployment configuration, supplied by whoever hosts the server. Users are not asked for these.
deployNEXT_PUBLIC_KERYX_REGISTRY_ADDRESS
deployNEXT_PUBLIC_KERYX_REGISTRY_READ_ADDRESS
deployNEXT_PUBLIC_KERYX_SETTLEMENT_WALLET
deployNEXT_PUBLIC_SUPABASE_PUBLISHABLE_KEY
deployNEXT_PUBLIC_SUPABASE_URL
deployNEXT_PUBLIC_WC_PROJECT_ID
deploySUPABASE_SERVICE_ROLE_KEY
// quality suggestions

Tool inputs are validated

1/2 tool handlers declare input schemas (50%)

Declare an inputSchema with zod/joi/yup on every tool definition.

Tool handlers catch errors

1/2 tool handlers wrap calls in try/catch (50%)

Wrap each tool handler body in try/catch and return a structured error response.

License file

No license file

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

Tool test coverage

1/2 tools referenced in tests (50%)

Write tests that reference each tool by name so every tool has at least one test.

Shell command execution

2 child_process calls — runs shell commands

Prefer library functions over shell-outs. If you must shell out, ensure all inputs are properly escaped.

Production dependencies are patched

0 critical, 12 high severity in production deps — next@16.1.6 (high), next@16.1.6 (high)

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

Dev dependencies

2 critical/high in dev-only deps (does not ship to users)

Upgrade dev dependencies when convenient.

Dependency freshness

4/40 production deps abandoned (no release in 2+ years): topojson-client@2022-06-27 (4.1y), world-atlas@2022-06-29 (4.1y), rss-parser@2023-04-11 (3.3y)

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 7 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/tang-vu/keryx?variant=verified)](https://m8ven.ai/mcp/tang-vu/keryx)
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commit: b0b0e681848a48aedf1e72a47c1a8296bf641388
code hash: 086f383340bfafb744d03a5f78465e7b8df6c1c264d9037654ac7f5553d1beae
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