Pinpole MCP Server (codeforstartups/pinpole-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.
Enables AI agents to design cloud architectures, run cost/performance simulations, and draw them on a Pinpole canvas directly from Claude Code, Cursor, and OpenAI Codex.
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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codeforstartups
Source: Glama
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Install from
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MCP_ALLOWED_HOSTSMCP_HOSTscaffolding Claude's custom-connector probe expects). Env: , MCP_PORT (default 3333).MCP_PORTscaffolding Claude's custom-connector probe expects). Env: MCP_HOST, (default 3333).PINPOLE_API_TOKENenv =pp_live_… \PINPOLE_BASE_URLenv =https://app.pinpole.cloud \PINPOLE_DEV_USER_IDLocal dev only. Sent as x-pinpole-dev-userid (requires the server to run with ALLOW_DEV_USER_HEADER=1). Lets you test without a token.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
9/9 tools missing one or more hints — pinpole_build_architecture (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); pinpole_create_architecture (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); pinpole_simulate_cost (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint), +6 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
5/9 tool handlers declare input schemas (56%)
Declare an inputSchema with zod/joi/yup on every tool definition.
Tool handlers catch errors
8/9 tool handlers wrap calls in try/catch (89%)
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.
Domain consistency
npm scope @pinpole doesn't match GitHub owner codeforstartups
Use the same org name across GitHub, npm, and your homepage so users can verify the publisher.
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.
[](https://m8ven.ai/mcp/codeforstartups-pinpole-mcp-2omzif)?variant=verified to the badge URL.Vetting this one by hand? Tool Check is an MCP that scores other MCPs. Add it once and ask Claude, ChatGPT, or any MCP client to grade a server, surface CVEs, check the publisher, and suggest safer alternatives — before you install.
https://m8ven.ai/api/mcp/tool-check