sleeper-caffeine MCP
Provides read-only access to Sleeper fantasy football leagues, enabling team snapshots, available players, matchups, trade context, and league history through standardized MCP tools.
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.
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chadnickbok
Source: Glama
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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.
CODEX_CLI_PATHSleeper Caffeine discovers Codex through , the user's PATH, or known Codex/ChatGPT application locations. It does not bundle a Codex binary.ELECTRON_RENDERER_URLRUN_CODEX_LIVE_TESTSRUN_LIVE_TESTSTool 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_team_snapshot (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); get_available_players (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); get_matchup_context (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 inputs are validated
Only 0/5 tool handlers declare input schemas (0%)
Declare an inputSchema with zod/joi/yup on every tool definition.
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.
Shell command execution
15 child_process calls — runs shell commands
Prefer library functions over shell-outs. If you must shell out, ensure all inputs are properly escaped.
Domain consistency
npm scope @sleeper-caffeine doesn't match GitHub owner chadnickbok
Use the same org name across GitHub, npm, and your homepage so users can verify the publisher.
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