prova-mcp (insinuateai/prova-mcp) 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.
An MCP server that exposes the Prova reasoning verifier, enabling AI agents to verify their own reasoning and kernel-check Lean 4 proofs before outputting answers.
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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insinuateai
Source: Glama
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Install from
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PROVA_API_BASE_URLConfigurable via PROVA_API_KEY, , PROVA_LEAN_BIN, PROVA_DEFAULT_RETAIN.PROVA_API_KEY_(unset → demo tier)_ API key from [prova.cobound.dev](https://prova.cobound.dev). Demo is rate-limited.PROVA_DEFAULT_RETAINfalse Whether verify_reasoning defaults to persisting the original reasoning text.PROVA_LEAN_BINlean Path to the Lean 4 executable.PROVA_MCP_LOG_LEVELWARNING Server log level.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 — verify_reasoning (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); get_certificate (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); download_lean_proof (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.
Destructive tools are labelled
1 tool perform destructive updates without destructiveHint — kernel_check_proof deletes at line 293 (os.unlink(tmp_path))
Add destructiveHint:true to any tool whose handler calls .delete(), .upsert(), .update(), unlink, rm, DELETE, DROP, REPLACE INTO, or any operation that overwrites existing data.
Tool handlers catch errors
Only 1/5 tool handlers wrap calls in try/catch (20%)
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.
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