Whetstone MCP Server

by cyberelf-whetstone

answering

Whetstone is answering right now. Last checked 5 min ago. It exposes 14 tools. Last commit 1 Aug 2026.

Promotion gate for AI agents: leakage audits, exact-statistics verdicts, and a live report card.

Uptime history 55 hours of history

55 hours agonow

100.0%

Uptime 24h

91 of 91 checks

Tools

read from the server

429 ms

Response time

average over 24h

Stars

last commit 1 Aug 2026

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 5 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add tools --transport http https://whetstone.cyberelf.link/mcp

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "tools": {
      "url": "https://whetstone.cyberelf.link/mcp"
    }
  }
}

~/.codex/config.toml

[mcp_servers.tools]
url = "https://whetstone.cyberelf.link/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "tools": {
      "url": "https://whetstone.cyberelf.link/mcp"
    }
  }
}

.vscode/mcp.json

{
  "mcpServers": {
    "tools": {
      "url": "https://whetstone.cyberelf.link/mcp"
    }
  }
}

Available tools 14

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

open

open_bench_leaderboard

TIER 2: list the self-attested public Open Promotion Bench receipts. Entries contain manifests, verdicts, item-level transitions, and commitments but never task contents or submitted answers.

open_bench_start

TIER 2: start a one-shot Open Promotion Bench session. Returns six fresh virtual-repository scope-integrity tasks. Run a baseline and candidate independently on the same cohort, then submit both answer maps with open_bench_submit. This is an open, procedural, self-attested track rather than a private-bank credential.

open_bench_submit

TIER 2: grade paired baseline and candidate patches, count gains/regressions/ties, and issue PASS/HOLD/BLOCK. Set publish=true plus attestation=true to append only the safe manifests and sanitized receipt to the public board; tasks and answers are never persisted.

report

report_card_start

TIER 1: start a disposable report-card session. Returns exam items (graph-repair prompts minted from the repository's public frontier) for THIS agent to answer. Answer every item, then call report_card_submit exactly once. Sessions are one-shot, expire in 15 minutes, and are strictly rate-limited. This demonstrates the promotion-gate mechanism on disposable items; it is not a private-bank credential.

report_card_submit

TIER 1: submit answers for a report-card session and receive the graded report (per-item verdicts, per-domain totals, SHA-256 commitments). Grading is by checker spec: any verified strict refinement of the item's predicate passes; no answer key exists. The session is destroyed by this call.

about

about_whetstone

What this service is: the tool catalog, the tier boundaries, and where the source lives.

audit

audit_leakage

Exact declared-exposure audit over your exam rows: row identity, behavioral fingerprints for graph-DSL expressions, text-similarity review flags, and a clean exam export. Full example: GET /api/examples key 'leakage'.

bank

bank_health

Item-lifecycle diagnostics over your grading history: discriminators, saturated and flaky items, frontier gaps. Full example: GET /api/examples key 'health'.

counterexample

counterexample_hunt

Bounded simulated-annealing search for a graph counterexample inside a DSL predicate class, with an exact certificate when found. CPU-bounded and strictly rate-limited. Full example: GET /api/examples key 'counterexample'.

inspect

inspect_promotion

Quarantine declared exposure, compare paired baseline/candidate outcomes on the clean remainder, and issue a promotion receipt. Bring your own exam rows, exposure records, and per-item results. Full example: GET /api/examples key 'inspector'.

memory

memory_relevance

Compare query-free salience against objective-conditioned relevance for a set of memories under a token budget. Full example: GET /api/examples key 'memory'.

promotion

promotion_gate

PASS, HOLD, or BLOCK from paired per-item results: gains, regressions, exact McNemar p-value, per-domain breakdown. Full example: GET /api/examples key 'gate'.

replay

replay_trace

Turn reasoning-emulator control events into checkpoints, rewinds, notes, and a timeline. Full example: GET /api/examples key 'replay'.

safe

safe_patch

Apply a section-scoped Markdown patch under conservation checks (untouched sections stay byte-identical; protected tokens preserved). Full example: GET /api/examples key 'safepatch'.

Endpoints

URL	Transport	State	Latency	Checked
https://whetstone.cyberelf.link/mcp	streamable-http	answering	421 ms	5 min ago

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Whetstone — questions

Answers built from our own checks of this server.

What can Whetstone do?

It exposes 14 tools, read directly from the server on our last check. Among them: about_whetstone, audit_leakage, bank_health, counterexample_hunt, inspect_promotion, memory_relevance and 8 more. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

What is Whetstone mostly used for?

Its tools cluster around open and report. That is what this server is built to work with — the grouping comes from the actual tool names, not from a category we assigned.

Is Whetstone working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 91 of 91 checks got a reply (100.0%), average response time 429 ms. The bar chart above shows every period we have measured.

How do I connect Whetstone?

Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does Whetstone need an API key?

No. Whetstone completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 14 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is Whetstone?

It answers our handshake in 429 ms on average, which is faster than 31% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.

Is Whetstone open source?

Yes — it is published under the AGPL-3.0 licence, written in Python, 0 stars on GitHub and 1 open issue. The source link is on this page, so you can read exactly what it does with your data before you connect it.