NVIDIA NemoClaw CKG
REMOTE · CKG-NVIDIA-NEMOCLAW.ONRENDER.COM · 2 COMPONENTS · SCANNED SEP 20
NVIDIA NemoClaw knowledge graph — 55 nodes, F1 0.576 (+269% vs RAG), 11x fewer tokens. MCP-native.
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 Security57
- 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 8 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
- HSTS check failed: the Strict-Transport-Security header is absent. See how to fix → View diagnostics → Fail
- 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 Usability68
- AI-judged instruction clarity (good).Pass
- Context-footprint check failed: tool/resource definitions use about 1126 tokens (~140/item across 8 items; 8 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 Coverage71
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 0% of tool parameters carry a description.Fail
- Structured output schemas are declared (100% of tools); any adoption earns full credit.Pass
Tool Safety100
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- We read all 8 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 9 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities100
- Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.Pass
How do I install the NVIDIA NemoClaw CKG MCP server?
NVIDIA NemoClaw CKG is a hosted endpoint at https://ckg-nvidia-nemoclaw.onrender.com/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 · ckg-nvidia-nemoclaw.onrender.com
claude mcp add --transport http yarmoluk-ckg-nvidia-nemoclaw 'https://ckg-nvidia-nemoclaw.onrender.com/mcp'
{
"mcpServers": {
"yarmoluk-ckg-nvidia-nemoclaw": {
"url": "https://ckg-nvidia-nemoclaw.onrender.com/mcp"
}
}
} {
"servers": {
"yarmoluk-ckg-nvidia-nemoclaw": {
"type": "http",
"url": "https://ckg-nvidia-nemoclaw.onrender.com/mcp"
}
}
} [mcp_servers.yarmoluk-ckg-nvidia-nemoclaw] url = "https://ckg-nvidia-nemoclaw.onrender.com/mcp"
{
"$schema": "https://opencode.ai/config.json",
"mcp": {
"yarmoluk-ckg-nvidia-nemoclaw": {
"type": "remote",
"url": "https://ckg-nvidia-nemoclaw.onrender.com/mcp",
"enabled": true
}
}
} openclaw mcp add yarmoluk-ckg-nvidia-nemoclaw --url 'https://ckg-nvidia-nemoclaw.onrender.com/mcp' --transport streamable-http
mcp_servers:
yarmoluk-ckg-nvidia-nemoclaw:
url: "https://ckg-nvidia-nemoclaw.onrender.com/mcp" {
"McpServers": {
"yarmoluk-ckg-nvidia-nemoclaw": {
"Transport": "http",
"Url": "https://ckg-nvidia-nemoclaw.onrender.com/mcp"
}
}
} assistant mcp add yarmoluk-ckg-nvidia-nemoclaw -t streamable-http -u 'https://ckg-nvidia-nemoclaw.onrender.com/mcp'
{
"mcpServers": {
"yarmoluk-ckg-nvidia-nemoclaw": {
"type": "http",
"url": "https://ckg-nvidia-nemoclaw.onrender.com/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.
- 10 Sept 26 0
- Server version: 1.29.1 → 1.30.0 functional
- 2 Sept 26 0
- Server version: 1.29.0 → 1.29.1 functional
- 29 Aug 26 +1
- Stability: 0.97 → pass security
- 27 Aug 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 90 to 93. That category is still filling its 30-day observation window: 27 days of observed history at the previous scan, 28 at this one. The score rises as the window fills, whether or not the server changes.
- 26 Aug 26 +1
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 25 Aug 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 83 to 87. That category is still filling its 30-day observation window: 25 days of observed history at the previous scan, 26 at this one. The score rises as the window fills, whether or not the server changes.
- 23 Aug 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 77 to 80. That category is still filling its 30-day observation window: 23 days of observed history at the previous scan, 24 at this one. The score rises as the window fills, whether or not the server changes.
- 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
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 20 Sept 2026 · Probed https://ckg-nvidia-nemoclaw.onrender.com/mcp
TLS valid
Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=onrender.com | CN=WE1,O=Google Trust Services,C=US | 24 Jul 2026 | 22 Oct 2026 | ECDSA 256 | ECDSA-SHA256 | 756bcb97dcf1455f0ebf70e5dbe07256 |
| SANs: onrender.com, *.onrender.com | ||||||
| CN=WE1,O=Google Trust Services,C=US (CA) | CN=GTS Root R4,O=Google Trust Services LLC,C=US | 13 Dec 2023 | 20 Feb 2029 | ECDSA 256 | ECDSA-SHA384 | 7ff31977972c224a76155d13b6d685e3 |
| CN=GTS Root R4,O=Google Trust Services LLC,C=US (CA) | CN=GlobalSign Root CA,OU=Root CA,O=GlobalSign nv-sa,C=BE | 15 Nov 2023 | 28 Jan 2028 | ECDSA 384 | SHA256-RSA | 7fe530bf331343bedd821610493d8a1b |
Background: What to check on a remote MCP endpoint →
DNSSEC insecure
Validation of ckg-nvidia-nemoclaw.onrender.com. — Not signed
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | trust_anchor | 20326, 38696 | 8, 8 | Verified |
| com. | present | 19718 | 13 | Verified |
| onrender.com. | 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 |
Background: How OAuth 2.1 works in the 2026 MCP spec →
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://ckg-nvidia-nemoclaw.onrender.com/mcp | Verified | 200 | |
| http (plaintext) | http://ckg-nvidia-nemoclaw.onrender.com/mcp | HTTPS enforced | 301 | https://ckg-nvidia-nemoclaw.onrender.com/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 →
ask_nemoclaw ~108
Answer a question about NVIDIA NemoClaw by traversing the knowledge graph. Covers: agent runtimes (OpenClaw/Hermes/Deep Agents), OpenShell platform, inference routing, network policy, security layers, deployment paths, progressive tool disclosure, managed MCP servers, snapshots, shields, FOX Blueprint, Nemotron 3 Ultra ecosystem, and platform support. Args: question: Your question about NemoClaw concepts or architecture.
| Name | Type | Req | Description |
|---|---|---|---|
| question | string | yes | – |
| Name | Type | Req | Description |
|---|---|---|---|
| result | string | yes | – |
No examples provided.
get_prerequisites ~53
Return the full upstream prerequisite chain for a NemoClaw concept. Useful for understanding what a concept depends on end-to-end. Args: concept: Exact or partial concept label.
| Name | Type | Req | Description |
|---|---|---|---|
| concept | string | yes | – |
| Name | Type | Req | Description |
|---|---|---|---|
| result | string | yes | – |
No examples provided.
list_domains ~17
List available domains in this CKG server.
Input schema present but exposes no named parameters.
| Name | Type | Req | Description |
|---|---|---|---|
| result | string | yes | – |
No examples provided.
query_ckg ~78
Return the typed subgraph around a NemoClaw concept. Args: concept: Exact or partial concept label (e.g. 'OpenClaw', 'NetworkPolicy', 'L7Proxy'). depth: Traversal hops (1–5, default 3).
| Name | Type | Req | Description |
|---|---|---|---|
| concept | string | yes | – |
| depth | integer | – | – |
| Name | Type | Req | Description |
|---|---|---|---|
| result | string | yes | – |
No examples provided.
query_intersect ~367
Answer a conjunctive query: concepts reachable from EVERY anchor at once (A AND B). query_ckg walks outward from one concept. This intersects the reachable sets of two or more, which is the shape of most real questions — "the component that satisfies A AND applies to B". Neither anchor alone answers it; the answer lives in the overlap. Every branch is an exact set of declared edges, so the intersection is exact. A concept appears only if a declared path reaches it from each anchor. A relation missing from the graph produces an empty result, never a guess. Args: branches: Two or more branches. Either a bare anchor ("TensorRT-LLM"), which takes everything within `depth` hops, or an anchor plus an explicit relation path using '>' ("TensorRT-LLM > REQUIRES > ENABLES"), where each relation replaces the frontier. '*' matches any relation. Mix both forms freely. depth: Hops for bare-anchor branches, 1-5 (default 2). Ignored for explicit paths. direction: 'out' follows dependencies, 'in' follows them backwards, 'both' (default). mode: 'AND' (default) intersects branches; 'OR' unions them. limit: Max concepts listed, 1-200 (default 40). The true count is always shown. Returns: Markdown with the query plan and its per-step set sizes, then the answer set with taxonomy tags. Reports which branch was empty when the intersection is empty.
| Name | Type | Req | Description |
|---|---|---|---|
| branches | array | yes | – |
| depth | integer | – | – |
| direction | string | – | – |
| limit | integer | – | – |
| mode | string | – | – |
| Name | Type | Req | Description |
|---|---|---|---|
| result | string | yes | – |
No examples provided.
route_query ~196
Route a NemoClaw question to the optimal model and reasoning approach via graph depth. The CKG graph IS the router. NemoClaw's dependency chains (e.g. OpenShell → L7Proxy → CorporateCA → mTLS) are deep and typed — hop depth is a deterministic complexity signal. No heuristic: the graph decides which model and reasoning approach to use. Routing table: hop_depth 1 → haiku · direct (single concept lookup) hop_depth 2 → sonnet · generic_cot (moderate chain) hop_depth 3+ → opus · sparql_cot (deep chain, structured reasoning required) Args: question: Concept name or natural language question about NemoClaw / OpenShell. Returns: model_tier + reasoning_approach + why + context subgraph to inject before LLM call.
| Name | Type | Req | Description |
|---|---|---|---|
| question | string | yes | – |
| Name | Type | Req | Description |
|---|---|---|---|
| result | string | yes | – |
No examples provided.
search_concepts ~53
Fuzzy search for NemoClaw concepts by name or keyword. Args: query: Partial name or keyword (e.g. 'policy', 'inference', 'agent').
| Name | Type | Req | Description |
|---|---|---|---|
| query | string | yes | – |
| Name | Type | Req | Description |
|---|---|---|---|
| result | string | yes | – |
No examples provided.
verify_source ~179
Return the authoritative source URL and content hash for a NemoClaw concept node. Every node in the CKG was declared from a specific source document. This tool returns the source URL (where the node came from) and the SHA-256 hash of that document's bytes at extraction time. A hash mismatch on re-fetch means either the source has changed (stale edge — re-extract) or the graph was patched without re-fetching (silent edit — investigate). Audit chain: edge answer → graph commit → source_hash → source_url (fetch hint) Verification: curl -s <source_url> | sha256sum # compare output to source_hash Args: concept: Exact or partial concept label (e.g. 'CorporateCA', 'L7Proxy').
| Name | Type | Req | Description |
|---|---|---|---|
| concept | string | yes | – |
| Name | Type | Req | Description |
|---|---|---|---|
| result | string | yes | – |
No examples provided.
What is the NVIDIA NemoClaw CKG MCP server?
NVIDIA NemoClaw CKG is an MCP server listed in the public MCP registry as io.github.Yarmoluk/ckg-nvidia-nemoclaw. NVIDIA NemoClaw knowledge graph, 55 nodes, F1 0.576 (+269% vs RAG), 11x fewer tokens. MCP-native. This page covers its hosted endpoint (https://ckg-nvidia-nemoclaw.onrender.com/mcp).
Is the NVIDIA NemoClaw CKG MCP server safe to use?
NVIDIA NemoClaw CKG scores 75 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 NVIDIA NemoClaw CKG MCP server expose?
NVIDIA NemoClaw CKG exposes 8 tools: ask_nemoclaw, query_ckg, get_prerequisites, search_concepts, list_domains, and 3 more. Their descriptions and schemas cost roughly 1,051 tokens of context every time the server is loaded.
Does the NVIDIA NemoClaw CKG MCP server require authentication?
No. We connected to NVIDIA NemoClaw CKG without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.
Is the NVIDIA NemoClaw CKG MCP server still maintained?
NVIDIA NemoClaw CKG is still listed as active in the MCP registry. We last reached this channel on 20 September 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.