Yandex Wordstat MCP (tvermolaev-source/open-webui_mcp_yandex) is an MCP server listed on the M8ven Trust Index. It scores 60 out of 100, grade C. It declares 5 tools. No publisher has claimed this listing.

Back to MCP Trust IndexM8ven
C
Caution
60/100

Yandex Wordstat MCP

MCP server for Yandex Wordstat v2 API enabling keyword research and search trend analysis with in-memory caching, integrated via mcpo proxy with Open WebUI.

→ tvermolaev-source/open-webui_mcp_yandex· 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.

How we verified

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Who stands behind it

tvermolaev-source

Source: Glama

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Install from

Glamanot 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: 3 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.
✅
Open source with a license and README
Anyone can audit the code, the license is declared, and the publisher documents what it does.
🔐
You'll be asked for 2 credentials: YANDEX_SEARCH_API_KEY, YANDEX_WORDSTAT_API_KEY
These are read from process.env at runtime. Make sure you trust where they’ll be sent.
// tools this server exposes5 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.

get-regions-tree

Returns the top levels of the Wordstat regions tree (countries, federal districts, major regions). Use get-region-children to drill down.

get-region-children

Returns the children of a specific region. Use to drill down from get-regions-tree.

top-requests

Returns popular search queries containing the specified keyword for the last 30 days, plus similar/associated queries. The phrase supports Wordstat search operators.

dynamics

Returns search volume dynamics (trend) for a keyword over time. Daily granularity: last 59 days. Weekly: last 52 weeks. Monthly (default): last 12 months.

regions

Returns how search volume for a keyword is distributed across regions over the last 30 days. Includes region names, share percentage and affinity index.

// known CVEs in dependencies3 high

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

high@modelcontextprotocol/sdk@1.12.1GHSA-345p-7cg4-v4c7

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

high@modelcontextprotocol/sdk@1.12.1GHSA-8r9q-7v3j-jr4g

Anthropic's MCP TypeScript SDK has a ReDoS vulnerability

high@modelcontextprotocol/sdk@1.12.1GHSA-w48q-cv73-mx4w

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

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.
configYANDEX_FOLDER_IDYANDEX_SEARCH_API_KEY=your_key =your_folder node src/index.mjs
🔐 secretYANDEX_SEARCH_API_KEYyour_key YANDEX_FOLDER_ID=your_folder node src/index.mjs
🔐 secretYANDEX_WORDSTAT_API_KEY
configYANDEX_WORDSTAT_FOLDER_ID
// 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-regions-tree (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); get-region-children (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); top-requests (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.

Tool handlers catch errors

Only 0/5 tool handlers wrap calls in try/catch (0%)

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

Tests exist

No test files found

Add tests that exercise each declared tool.

Production dependencies are patched

0 critical, 3 high severity in production deps — @modelcontextprotocol/sdk@1.12.1 (high), @modelcontextprotocol/sdk@1.12.1 (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/tvermolaev-source/open-webui_mcp_yandex?variant=verified)](https://m8ven.ai/mcp/tvermolaev-source/open-webui_mcp_yandex)
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commit: 8b2e56a8858a9821c2d2611d2c272c2cef98e73e
code hash: bcefabad1a0803c4ef1b5ae5e977a46d45c537461ac01f9f93ff83352d582b93
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