Ovellum
NPM · OVELLUM · SCANNED SEP 20
Auto, manual, or hybrid docs that never fall out of sync.
Available components
How this component scores in each security and reliability category. Every signal is checked automatically from public evidence about the published package, including repeated runs of it in an isolated sandbox, and we only credit what we can confirm. How we score → Why this is hard to score →
Supply Chain Security98
- No malware found by supply-chain analysis.Pass
- No known CVEs affecting this package version or its production dependencies.Pass
- No install/post-install scripts declared.Pass
- 48 of 166 dependencies flagged as unhealthy. View diagnostics → Partial
Provenance & Transparency45
- Source repository is publicly reachable at the declared URL. View diagnostics → Pass
- Provenance check failed: no build-provenance attestation is published. See how to fix → View diagnostics → Fail
- Clear OSI-approved license (MIT).Pass
- Actively maintained (last published 63 days ago).Pass
- Disclosure check failed: no security disclosure policy was found in the source repository. See how to fix → Fail
Schema Quality & AI Usability87
- 100% of prompts and resources have a non-trivial description (not blank, and not just the item's name).Pass
- AI-judged instruction clarity (excellent).Pass
- Tool/resource definitions use about 689 tokens (~68/item across 10 items; 9 tools + 1 resources), lean.Pass
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management83
- Stability observed for 25 of 30 days with no destabilising changes; credit accrues until the full window elapses.Partial
Tool Coverage100
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 100% of tool parameters carry a description.Pass
Tool Safety100
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- We read all 9 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 10 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 Ovellum MCP server?
Ovellum runs locally as an npm package, launched with npx -y ovellum. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.
npm · ovellum
claude mcp add oinam-ovellum -- npx -y ovellum
{
"mcpServers": {
"oinam-ovellum": {
"command": "npx",
"args": [
"-y",
"ovellum"
]
}
}
} {
"servers": {
"oinam-ovellum": {
"command": "npx",
"args": [
"-y",
"ovellum"
]
}
}
} codex mcp add oinam-ovellum -- npx -y ovellum
{
"$schema": "https://opencode.ai/config.json",
"mcp": {
"oinam-ovellum": {
"type": "local",
"command": [
"npx",
"-y",
"ovellum"
],
"enabled": true
}
}
} openclaw mcp add oinam-ovellum --command npx --arg -y --arg ovellum
mcp_servers:
oinam-ovellum:
command: "npx"
args: ["-y", "ovellum"] {
"McpServers": {
"oinam-ovellum": {
"Transport": "stdio",
"Command": "npx",
"Arguments": [
"-y",
"ovellum"
]
}
}
} assistant mcp add oinam-ovellum -t stdio -c npx -a -y ovellum
{
"mcpServers": {
"oinam-ovellum": {
"command": "npx",
"args": [
"-y",
"ovellum"
]
}
}
} 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.
- 20 Sept 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 80 to 83. That category is still filling its 30-day observation window: 24 days of observed history at the previous scan, 25 at this one. The score rises as the window fills, whether or not the server changes.
- 19 Sept 26 −3
- Stability: pass → 0.80 functional
- 18 Sept 26 0
- Stability: 0.97 → pass security
- 17 Sept 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 93 to 97. That category is still filling its 30-day observation window: 28 days of observed history at the previous scan, 29 at this one. The score rises as the window fills, whether or not the server changes.
- 15 Sept 26 +1
- Security disclosure: unverified → fail ▼ functional
- 14 Sept 26 0
- Security disclosure: fail → unverified ▼ functional
- 13 Sept 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 80 to 83. That category is still filling its 30-day observation window: 24 days of observed history at the previous scan, 25 at this one. The score rises as the window fills, whether or not the server changes.
- 12 Sept 26 −3
- Stability: pass → 0.80 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 · Analysed npm/ovellum@0.24.0
Provenance No attestation
The registry publishes no build provenance for this version, so there is nothing to verify.
| Result | No attestation |
|---|---|
| Ecosystem | npm |
Background: How many MCP packages publish verified provenance →
Dependencies 166 packages
| Packages resolved | 166 |
|---|---|
| Stale | 48 |
| Tree resolution | Complete |
Background: SBOMs and build attestations, explained →
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 →
ovellum_build ~42
Run an Ovellum build (parse + generate + merge, or site build). Returns the build summary.
| Name | Type | Req | Description |
|---|---|---|---|
| drafts | boolean | – | Include draft pages. |
No output schema declared.
No examples provided.
ovellum_check ~68
Validate the project without writing: broken internal links, unsafe URL schemes, and stale translations (and, with strict, id-less protected zones, stale anchors, and title-less pages). Returns counts and a per-issue list.
| Name | Type | Req | Description |
|---|---|---|---|
| strict | boolean | – | Run the stricter validations too. |
No output schema declared.
No examples provided.
ovellum_diff ~39
Compare the current source against the last build IR snapshot. Returns added / removed / changed / renamed symbols and which docs would change. Read-only.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
ovellum_get_page ~63
Read a built page's Markdown from the output directory (the AI-friendly .md mirror). Path is relative to the output dir; must stay inside it.
| Name | Type | Req | Description |
|---|---|---|---|
| path | string | yes | Path under the output dir, e.g. "guide/intro.md". |
No output schema declared.
No examples provided.
ovellum_list_orphans ~66
List quarantined manual blocks under protect.orphanDir, with age, last-seen, and (vs the IR snapshot) whether each anchor is back in source. Optional stale filter.
| Name | Type | Req | Description |
|---|---|---|---|
| stale | boolean | – | Only orphans older than protect.orphanRetention days. |
No output schema declared.
No examples provided.
ovellum_query_symbol ~79
Look up a documented symbol in the persisted IR snapshot by exact anchor id or by name. Returns kind, signature, source location, description, params, and returns.
| Name | Type | Req | Description |
|---|---|---|---|
| id | string | – | Exact anchor id, e.g. "src/math.ts::add". |
| name | string | – | Symbol name to match (returns all matches). |
No output schema declared.
No examples provided.
ovellum_reattach ~123
Rescue an orphaned manual block: splice its prose back into a @manual zone under a target anchor (defaulting to the suggested present-again / renamed anchor) and remove the archive, or delete the orphan. The non-interactive counterpart of `ovellum orphans --reattach`.
| Name | Type | Req | Description |
|---|---|---|---|
| anchorId | string | yes | The orphan to act on (its original anchor id). |
| delete | boolean | – | Delete the orphan instead of reattaching. |
| target | string | – | Anchor id to reattach under (default: the suggested target). |
No output schema declared.
No examples provided.
ovellum_search_docs ~64
Full-text search over the built docs. Returns ranked pages with a path, title, score, and snippet. Run a build first so the output exists.
| Name | Type | Req | Description |
|---|---|---|---|
| limit | number | – | Max results (default 10). |
| query | string | yes | Search terms. |
No output schema declared.
No examples provided.
ovellum_write_zone ~128
Write Markdown prose into a protected @manual zone under an anchor id, so it survives the next hybrid regeneration. Inserts a new block or replaces an existing one with the same blockId. Use dryRun to preview without writing. Survival requires hybrid mode.
| Name | Type | Req | Description |
|---|---|---|---|
| anchorId | string | yes | Anchor the block attaches to, e.g. "src/math.ts::add". |
| blockId | string | – | Stable id for the block (default "agent-note"). |
| content | string | yes | Markdown body of the protected block. |
| dryRun | boolean | – | Preview the change without writing. |
No output schema declared.
No examples provided.
What is the Ovellum MCP server?
Ovellum is an MCP server listed in the public MCP registry as io.github.oinam/ovellum. Auto, manual, or hybrid docs that never fall out of sync. This page covers its npm package (ovellum).
Is the Ovellum MCP server safe to use?
Ovellum scores 84 out of 100 on VerifyMCP. We found no known CVEs affecting it as of 20 September 2026. It declares no install or post-install scripts. 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 Ovellum MCP server expose?
Ovellum exposes 9 tools: ovellum_query_symbol, ovellum_diff, ovellum_check, ovellum_list_orphans, ovellum_get_page, and 4 more. Their descriptions and schemas cost roughly 672 tokens of context every time the server is loaded.
Is the Ovellum MCP server still maintained?
Ovellum 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.
What licence is the Ovellum MCP server under?
Ovellum declares the MIT licence, which is OSI-approved. That covers the source only, and says nothing about the cost of any service it calls.