Whetstone
REMOTE · WHETSTONE.CYBERELF.LINK · SCANNED SEP 24
Verifier-grounded AI promotion gates, disposable report cards, and signed PASS/HOLD/BLOCK receipts.
Available components
How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. How we score → Why this is hard to score →
Endpoint Security63
- The endpoint's TLS certificate is valid, in date, and uses a strong key. View diagnostics → Pass
- Authorisation not fully verified: no authorisation is required to call this server, and 14 tool(s) never declared a destructiveHint. The MCP spec treats an absent hint as destructive by default, so we cannot call this surface safe. See how to fix → View diagnostics → Unverified
- HTTPS is enforced; there's no plaintext access path. View diagnostics → Pass
- The HSTS (Strict-Transport-Security) header is present. View diagnostics → Pass
- DNSSEC check failed: this domain isn't protected by DNSSEC. See how to fix → View diagnostics → Fail
Transport & Reachability100
- Verified streamable-http transport via a live MCP handshake. View diagnostics → Pass
Schema Quality & AI Usability69
- AI-judged instruction clarity (good).Pass
- Context-footprint check failed: tool/resource definitions use about 1750 tokens (~125/item across 14 items; 14 tools + 0 resources), over budget; trim descriptions and params. See how to fix → Fail
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management100
- No destabilizing schema changes in the last 30 days.Pass
Tool Coverage83
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 48% of tool parameters carry a description.Partial
Tool Safety100
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- We read all 14 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 15 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities100
- Implements a current MCP spec version (2026-07-28).Pass
How do I install the Whetstone MCP server?
Whetstone is a hosted endpoint at https://whetstone.cyberelf.link/mcp, so there is nothing to install locally. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.
remote · whetstone.cyberelf.link
claude mcp add --transport http link-cyberelf-whetstone-tools 'https://whetstone.cyberelf.link/mcp'
{
"mcpServers": {
"link-cyberelf-whetstone-tools": {
"url": "https://whetstone.cyberelf.link/mcp"
}
}
} {
"servers": {
"link-cyberelf-whetstone-tools": {
"type": "http",
"url": "https://whetstone.cyberelf.link/mcp"
}
}
} [mcp_servers.link-cyberelf-whetstone-tools] url = "https://whetstone.cyberelf.link/mcp"
{
"$schema": "https://opencode.ai/config.json",
"mcp": {
"link-cyberelf-whetstone-tools": {
"type": "remote",
"url": "https://whetstone.cyberelf.link/mcp",
"enabled": true
}
}
} openclaw mcp add link-cyberelf-whetstone-tools --url 'https://whetstone.cyberelf.link/mcp' --transport streamable-http
mcp_servers:
link-cyberelf-whetstone-tools:
url: "https://whetstone.cyberelf.link/mcp" {
"McpServers": {
"link-cyberelf-whetstone-tools": {
"Transport": "http",
"Url": "https://whetstone.cyberelf.link/mcp"
}
}
} assistant mcp add link-cyberelf-whetstone-tools -t streamable-http -u 'https://whetstone.cyberelf.link/mcp'
{
"mcpServers": {
"link-cyberelf-whetstone-tools": {
"type": "http",
"url": "https://whetstone.cyberelf.link/mcp"
}
}
} The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.
Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.
- 29 Aug 26 +5
- Stability: fail → pass ▲ security
- 26 Aug 26 73
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 11 Aug 26 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 8 Aug 26 0
- Server version: 0.7.0 → 0.8.0 functional
- “open_bench_start” added an optional parameter “challenge” cosmetic
- “report_card_start” added an optional parameter “challenge” cosmetic
- 7 Aug 26 0
- The server rewrote its instructions, which are the text every model session reads security
- Tool “report_card_submit” rewrote its description, which is the text the model reads security
- MCP protocol: fail → pass ▲ functional
- Schema quality: good → fair functional
- MCP protocol version: 2025-06-18 → 2026-07-28 functional
- Server version: 0.6.0 → 0.7.0 functional
- 2 Aug 26 0
- The server rewrote its instructions, which are the text every model session reads security
- Schema quality: 1385 → 1693 ▼ functional
- Tool coverage: 53% → 46% ▼ functional
- Schema quality: fair → good functional
- Server version: 0.5.3 → 0.6.0 functional
- New tool “open_bench_leaderboard” functional
- New tool “open_bench_start” functional
- New tool “open_bench_submit” functional
- 31 Jul 26 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 30 Jul 26 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.
Captured 24 Sept 2026 · Probed https://whetstone.cyberelf.link/mcp
TLS valid
Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=whetstone.cyberelf.link | CN=YE1,O=Let's Encrypt,C=US | 10 Sept 2026 | 9 Dec 2026 | ECDSA 256 | ECDSA-SHA384 | 503703e8bd94680197de92d69555ad65b34 |
| SANs: whetstone.cyberelf.link | ||||||
| CN=YE1,O=Let's Encrypt,C=US (CA) | CN=Root YE,O=ISRG,C=US | 3 Sept 2025 | 2 Sept 2028 | ECDSA 384 | ECDSA-SHA384 | 5ddd70dd31f801c85c186a7a04b80afe |
| CN=Root YE,O=ISRG,C=US (CA) | CN=ISRG Root X2,O=Internet Security Research Group,C=US | 13 May 2026 | 2 Sept 2032 | ECDSA 384 | ECDSA-SHA384 | 872165fc34b6e5fba8add5b3705fb53a |
| CN=ISRG Root X2,O=Internet Security Research Group,C=US (CA) | CN=ISRG Root X1,O=Internet Security Research Group,C=US | 13 May 2026 | 2 Sept 2032 | ECDSA 384 | SHA256-RSA | 6c8f1dc727c7117f7baf853ac980f9cd |
Background: What to check on a remote MCP endpoint →
DNSSEC insecure
Validation of whetstone.cyberelf.link. — Not signed
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | trust_anchor | 20326, 38696 | 8, 8 | Verified |
| link. | present | 16766 | 13 | Verified |
| cyberelf.link. | absent | Unsigned (proven) parent-signed NSEC/NSEC3 proves an unsigned delegation |
Authentication No authorisation required
The endpoint answered without asking for a token. Anyone who knows the URL can reach it.
| Result | No authorisation required |
|---|---|
| HTTP status | 200 |
| Header | Value |
|---|---|
| strict-transport-security | max-age=31536000 |
| content-security-policy | default-src 'self'; script-src 'self'; style-src 'self' 'unsafe-inline'; img-src 'self' data:; connect-src 'self'; object-src 'none'; base-uri 'none'; form-action 'self'; frame-ancestors 'none' |
| x-content-type-options | nosniff |
| x-frame-options | DENY |
| referrer-policy | no-referrer |
| permissions-policy | camera=(), microphone=(), geolocation=(), payment=() |
Background: How OAuth 2.1 works in the 2026 MCP spec →
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://whetstone.cyberelf.link/mcp | Verified | 200 | |
| http (plaintext) | http://whetstone.cyberelf.link/mcp | HTTPS enforced | 301 | https://whetstone.cyberelf.link/mcp |
The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability. A tool's description is untrusted text the model reads on every call, which is what makes this list a security surface and not just an inventory: how tool poisoning works →
about_whetstone ~29
What this service is: the tool catalog, the tier boundaries, and where the source lives.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
audit_leakage ~142
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'.
| Name | Type | Req | Description |
|---|---|---|---|
| enable_behavioral_fingerprint | boolean | – | – |
| enable_text_similarity | boolean | – | – |
| exam | array | yes | Exam rows. Each row needs item_id (or id) plus prompt/content/input/task/question/expression. |
| exposure | array | – | Declared exposure rows carrying identity/content fields and an optional source or path. |
| fingerprint_max_n | integer | – | – |
| similarity_threshold | number | – | – |
No output schema declared.
No examples provided.
bank_health ~61
Item-lifecycle diagnostics over your grading history: discriminators, saturated and flaky items, frontier gaps. Full example: GET /api/examples key 'health'.
| Name | Type | Req | Description |
|---|---|---|---|
| history | array | yes | Observed item/system outcomes. |
| items | array | – | Optional item definitions. |
No output schema declared.
No examples provided.
counterexample_hunt ~120
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'.
| Name | Type | Req | Description |
|---|---|---|---|
| expression | string | yes | Graph predicate in the Whetstone DSL, for example: is_connected and is_triangle_free and not is_bipartite |
| ns | array | – | Graph sizes searched. |
| restarts | integer | – | – |
| seed | integer | – | – |
| steps | integer | – | – |
No output schema declared.
No examples provided.
inspect_promotion ~246
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'.
| Name | Type | Req | Description |
|---|---|---|---|
| baseline | object | yes | item_id -> boolean pass/fail result for the baseline system. |
| baseline_name | string | – | – |
| candidate | object | yes | item_id -> boolean pass/fail result for the candidate system. |
| candidate_name | string | – | – |
| domains | object | – | Optional item_id -> domain label mapping. |
| enable_behavioral_fingerprint | boolean | – | – |
| enable_text_similarity | boolean | – | – |
| exam | array | yes | Exam rows. Each row needs item_id (or id) plus prompt/content/input/task/question/expression. |
| exposure | array | – | Declared exposure rows carrying identity/content fields and an optional source or path. |
| fingerprint_max_n | integer | – | – |
| policy | object | – | Explicit promotion policy. Omitted fields use the documented defaults. |
| retained_probe | object | – | Optional retained-capability result checked alongside the paired cohort. |
| similarity_threshold | number | – | – |
No output schema declared.
No examples provided.
memory_relevance ~113
Compare query-free salience against objective-conditioned relevance for a set of memories under a token budget. Full example: GET /api/examples key 'memory'.
| Name | Type | Req | Description |
|---|---|---|---|
| context_entities | array | – | Entities already active in context. |
| current_step | integer | – | – |
| memories | array | yes | Memories to rank. |
| objective | string | yes | – |
| objective_entities | array | – | Optional explicit entities when the objective text is not self-describing. |
| question_kind | string | – | – |
| token_budget | integer | – | – |
No output schema declared.
No examples provided.
open_bench_leaderboard ~49
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.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
open_bench_start ~92
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.
| Name | Type | Req | Description |
|---|---|---|---|
| challenge | string | – | Caller nonce bound into the signed receipt for replay detection. |
No output schema declared.
No examples provided.
open_bench_submit ~121
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.
| Name | Type | Req | Description |
|---|---|---|---|
| attestation | boolean | – | – |
| baseline_answers | object | yes | – |
| baseline_manifest | object | yes | – |
| candidate_answers | object | yes | – |
| candidate_manifest | object | yes | – |
| publish | boolean | – | – |
| session_id | string | yes | – |
No output schema declared.
No examples provided.
promotion_gate ~151
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'.
| Name | Type | Req | Description |
|---|---|---|---|
| baseline | object | yes | item_id -> boolean pass/fail result for the baseline system. |
| baseline_name | string | – | – |
| candidate | object | yes | item_id -> boolean pass/fail result for the candidate system. |
| candidate_name | string | – | – |
| domains | object | – | Optional item_id -> domain label mapping. |
| policy | object | – | Explicit promotion policy. Omitted fields use the documented defaults. |
| retained_probe | object | – | Optional retained-capability result checked alongside the paired cohort. |
No output schema declared.
No examples provided.
replay_trace ~60
Turn reasoning-emulator control events into checkpoints, rewinds, notes, and a timeline. Full example: GET /api/examples key 'replay'.
| Name | Type | Req | Description |
|---|---|---|---|
| events | array | yes | Ordered reasoning-emulator events. |
| notes | array | – | Optional analyst notes. |
No output schema declared.
No examples provided.
report_card_start ~109
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.
| Name | Type | Req | Description |
|---|---|---|---|
| challenge | string | – | Caller nonce bound into the signed receipt for replay detection. |
No output schema declared.
No examples provided.
report_card_submit ~114
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: verified strict refinements are reported separately, and promotion grade requires at least 5% clean-support retention. No answer key exists. The session is destroyed by this call.
| Name | Type | Req | Description |
|---|---|---|---|
| answers | object | yes | item_id -> answer (a DSL predicate, or the JSON reply the prompt asked for) |
| session_id | string | yes | – |
No output schema declared.
No examples provided.
safe_patch ~71
Apply a section-scoped Markdown patch under conservation checks (untouched sections stay byte-identical; protected tokens preserved). Full example: GET /api/examples key 'safepatch'.
| Name | Type | Req | Description |
|---|---|---|---|
| document | string | yes | Complete Markdown document to patch. |
| operations | array | yes | – |
| reason | string | – | – |
No output schema declared.
No examples provided.
What is the Whetstone MCP server?
Whetstone is an MCP server listed in the public MCP registry as link.cyberelf.whetstone/tools. Verifier-grounded AI promotion gates, disposable report cards, and signed PASS/HOLD/BLOCK receipts. This page covers its hosted endpoint (https://whetstone.cyberelf.link/mcp).
Is the Whetstone MCP server safe to use?
Whetstone scores 78 out of 100 on VerifyMCP. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.
What tools does the Whetstone MCP server expose?
Whetstone exposes 14 tools: inspect_promotion, audit_leakage, promotion_gate, bank_health, safe_patch, and 9 more. Their descriptions and schemas cost roughly 1,478 tokens of context every time the server is loaded.
Does the Whetstone MCP server require authentication?
No. We connected to Whetstone without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.
Is the Whetstone MCP server still maintained?
Whetstone is still listed as active in the MCP registry. We last reached this channel on 24 September 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.