BigQuery MCP Server (qybbs/saas-to-mcp-gateway) is an MCP server listed on the M8ven Trust Index. It scores 74 out of 100, grade C. It declares 5 tools. No publisher has claimed this listing.

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C
Emerging
74/100

BigQuery MCP Server

Enables secure, read-only querying of Google BigQuery datasets through a stateless MCP server with OAuth 2.1 authorization, designed for integration with Atlassian Rovo.

→ qybbs/saas-to-mcp-gateway· listed on glama

Emerging. No concerning findings. Grades remain capped until the project builds reputation through adoption. 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

qybbs

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
🚨
Secret credentials may flow to a network call
1 flow detected: OIDC_CLIENT_SECRET. We can’t prove the destination matches the brand the credential belongs to.
🔐
You'll be asked for 3 credentials: MASTER_SECRET_KEY, MOCK_USER_PASSWORD, OIDC_CLIENT_SECRET
These are read from process.env at runtime. Make sure you trust where they’ll be sent.
// 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.
configALLOWED_CORS_ORIGINS
configALLOWED_EMAIL_DOMAINSSecurity & Authorization: , ALLOWED_REDIRECT_URIS, TOKEN_EXPIRATION, TOKEN_EXPIRATION_SECONDS
configALLOWED_REDIRECT_URISSecurity & Authorization: ALLOWED_EMAIL_DOMAINS, , TOKEN_EXPIRATION, TOKEN_EXPIRATION_SECONDS
configALLOWLIST_TABLESYou are attempting to query a table not configured in the ALLOWLIST_TABLES environment variable.
configAUTH_PROVIDER3. When your client triggers the authorization flow (by visiting https://<your-mcp-domain>/oauth/authorize?...), the server will detect =OIDC and redirect you to the Microsoft login screen.
configDCR_PERSISTENCE_MODEAuthentication & Persistence: MASTER_SECRET_KEY, AUTH_PROVIDER, (options: STATELESS, MEMORY, FIRESTORE), and OIDC specific variables.
configFIRESTORE_DCR_COLLECTION
configGATEWAY_CONFIG_PATH
configGCP_KEY_FILE_PATH
configGCP_PROJECT_ID
🔐 secretMASTER_SECRET_KEYAuthentication & Persistence: , AUTH_PROVIDER, DCR_PERSISTENCE_MODE (options: STATELESS, MEMORY, FIRESTORE), and OIDC specific variables.
configMAX_BYTES_BILLEDDescription: Executes a read-only GoogleSQL SELECT query on the allowed tables. Enforces client-side row capping (max 1000 rows) and database-side cost protection limits ().
configMOCK_USER_EMAIL
🔐 secretMOCK_USER_PASSWORD
configOIDC_AUTHORIZATION_ENDPOINT
configOIDC_CLIENT_ID
🔐 secretOIDC_CLIENT_SECRET
configOIDC_REDIRECT_URI
configOIDC_TOKEN_ENDPOINT
configROW_LIMITBigQuery Limits: MAX_BYTES_BILLED,
configTOKEN_EXPIRATIONSecurity & Authorization: ALLOWED_EMAIL_DOMAINS, ALLOWED_REDIRECT_URIS, , TOKEN_EXPIRATION_SECONDS
configTOKEN_EXPIRATION_SECONDSSecurity & Authorization: ALLOWED_EMAIL_DOMAINS, ALLOWED_REDIRECT_URIS, TOKEN_EXPIRATION,
Deployment configuration, supplied by whoever hosts the server. Users are not asked for these.
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

5/5 tools missing one or more hints — list_allowed_tables (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); describe_table (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); estimate_query_cost (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.

Secrets stay with their owner

1 secret sent to a request target we could not resolve (OIDC_CLIENT_SECRET → dynamic) — often a configured endpoint, not necessarily third-party

Audit where credentials are sent. A NOTION_TOKEN should only reach api.notion.com — never a third-party host.

Dependency freshness

1/9 production deps stale: escape-html@2023-11-16 (2.8y)

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 3 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 Score](https://m8ven.ai/badge/mcp/qybbs/atlassian-bigquery-mcp)](https://m8ven.ai/mcp/qybbs/atlassian-bigquery-mcp)
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commit: eb9f76b343466cdade3503363e166ed5ce6e5f65
code hash: c2ce611b43ed140724f1a5accc00705c57e6c9179200eeb72ce8ad42a77cefc5
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