Claude Token Saver (blackfoil/claude-token-saver-mcp) is an MCP server listed on the M8ven Trust Index. M8ven has not graded it: there is no public source to read and no endpoint we can reach, so there is nothing for us to inspect. No publisher has claimed this listing.
Offloads routine coding tasks to a local LLM to reduce Claude API token usage.
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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blackfoil
Source: PulseMCP · also listed on Glama
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Disclosed vulnerabilities in this server's declared npm dependencies (via OSV). Whether each is reachable depends on the installed versions.
When Vitest UI server is listening, arbitrary file can be read and executed
Vitest allows Remote Code Execution when accessing a malicious website while Vitest API server is listening
Model Context Protocol (MCP) TypeScript SDK does not enable DNS rebinding protection by default
tsup DOM Clobbering vulnerability
CLOUD_INPUT_PRICE_PER_MTOKENCLOUD_OUTPUT_PRICE_PER_MTOKENLOG_LEVELMAX_SIMULTANEOUS_MODELSMODEL_OVERRIDEMODEL_PREFER_QUALITYMODEL_SELECTOR_ENABLEDOLLAMA_BASE_URLOLLAMA_TIMEOUT_MSPRELOAD_KEEP_ALIVEQUEUE_MAX_SIZEQUEUE_TIMEOUT_MSTIER_OVERRIDETool 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 — offload_work (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); compress_context (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); cost_dashboard (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 test coverage
3/5 tools referenced in tests (60%)
Write tests that reference each tool by name so every tool has at least one test.
Shell command execution
1 child_process call — 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, 1 high severity in production deps — @modelcontextprotocol/sdk@1.0.0 (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.
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