mcp-server-smallinvoice (AIWerk/mcp-server-smallinvoice) is an MCP server listed on the M8ven Trust Index. M8ven has not graded it: we have no way to read this server ourselves. No publisher has claimed this listing.

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58/100
25 days ago

mcp-server-smallinvoice

MCP server for smallinvoice.ch — Swiss SME invoicing and accounting with 146 tools and OAuth2 BYOC authentication.

→ AIWerk/mcp-server-smallinvoice· 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

AIWerk

Source: Glama

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// key findings
🚨
Known vulnerabilities in dependencies: 1 critical, 3 high
Affects packages this MCP installs at runtime. Upgrade or remove the affected dependency.
🔐
You'll be asked for 3 credentials: SMALLINVOICE_ACCESS_TOKEN, SMALLINVOICE_CLIENT_SECRET, SMALLINVOICE_REFRESH_TOKEN
These are read from process.env at runtime. Make sure you trust where they’ll be sent.
// known CVEs in dependencies1 critical3 high

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

criticalvitest@3.2.1GHSA-5xrq-8626-4rwp

When Vitest UI server is listening, arbitrary file can be read and executed

high@modelcontextprotocol/sdk@1.19.1GHSA-345p-7cg4-v4c7

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

high@modelcontextprotocol/sdk@1.19.1GHSA-8r9q-7v3j-jr4g

Anthropic's MCP TypeScript SDK has a ReDoS vulnerability

high@modelcontextprotocol/sdk@1.19.1GHSA-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.
configAIWERK_PDF_RETURN_BASE64
🔐 secretSMALLINVOICE_ACCESS_TOKENoptional Pre-loaded access token; lazily refreshed if absent or expired
configSMALLINVOICE_API_TIMEOUT_MSoptional Request timeout in ms (default: 30000)
configSMALLINVOICE_CLIENT_ID✅ OAuth2 client ID — smallinvoice Home → Users → API V2 → New client
🔐 secretSMALLINVOICE_CLIENT_SECRET✅ OAuth2 client secret
configSMALLINVOICE_DRY_RUNoptional Set to 1 to prevent write operations from reaching the API
configSMALLINVOICE_NO_SNAPSHOToptional Set to 1 to disable pre-write entity snapshots
🔐 secretSMALLINVOICE_REFRESH_TOKEN✅ Initial refresh token from the OAuth bootstrap flow (rotates per call)
configSMALLINVOICE_SNAPSHOT_DIRoptional Directory for pre-write snapshots (default: ~/.aiwerk/smallinvoice-snapshots)
configSMALLINVOICE_SNAPSHOT_FAIL_OPENoptional Set to 1 to log a warning instead of blocking when a snapshot fails
configSMALLINVOICE_TOKEN_FILEoptional Path to persist rotating tokens (default: ~/.aiwerk/smallinvoice-tokens.json)
// quality suggestions

All four hints declared on every tool

146/146 tools missing one or more hints — get_owner (missing: idempotentHint, openWorldHint); get_profile (missing: idempotentHint, openWorldHint); list_product_categories (missing: idempotentHint, openWorldHint), +143 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 test coverage

Only 0/146 tools referenced in tests (0%)

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

Production dependencies are patched

0 critical, 3 high severity in production deps — @modelcontextprotocol/sdk@1.19.1 (high), @modelcontextprotocol/sdk@1.19.1 (high)

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

Dev dependencies

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

Upgrade dev dependencies when convenient.

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 4 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: f912a21e385219041df5f6c66e7a91edd105343e
code hash: 4c41fbd73bc04c95bdc2f28f7e01663b17daef79fa4cf2440f72237d25b9c33e
verified: 8/7/2026, 3:55:16 AM
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