Ellmos Clatcher MCP
NPM · ELLMOS-CLATCHER-MCP
Utility MCP server: JSON repair, encoding fixes, conversion, duplicates, batch rename, archives.
Available components
Last scanned (5 hours ago)
Scores higher than 55% of npm servers
Category Documents and Files
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 Security81
- No malware found by supply-chain analysis.Pass
- CVE check failed: a known high-severity CVE affects zod 3.25.76, a direct dependency. A fixed version is available. View diagnostics → Fail
- No install/post-install scripts declared.Pass
- 45 of 158 dependencies flagged as unhealthy. View diagnostics → Partial
Provenance & Transparency48
- 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 46 days ago).Pass
- Publishes a security disclosure policy (SECURITY.md).Pass
Schema Quality & AI Usability73
- AI-judged instruction clarity (good).Pass
- Tool/resource definitions use about 904 tokens (~75/item across 12 items; 12 tools + 0 resources), lean.Pass
- 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 Coverage94
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 82% of tool parameters carry a description.Partial
Tool Safety75
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- 0 of 1 tool(s) whose name or description implies an irreversible operation declare an MCP destructiveHint annotation; "cleanup_file" implies "remove" and declares no destructiveHint at all, which the MCP spec reads as destructive by default. See how to fix → Fail
- An AI judge read all 12 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
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.
- 4 Nov 26 0
- Stability: 0.97 → pass security
- 3 Nov 26 0
- Stability: pass → 0.97 functional
- 28 Oct 26 0
- Stability: 0.97 → pass security
- 27 Oct 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.
- 26 Oct 26 −1
- Stability: pass → 0.93 functional
- 25 Oct 26 0
- Stability: pass → unverified ▼ security
- Tool safety: pass → unverified ▼ security
- CVE-2026-92000 no longer affects this package ▲ security
- CVE-2026-114102 no longer affects this package ▲ security
- CVE-2026-77301 no longer affects this package ▲ security
- CVE-2026-114104 no longer affects this package ▲ security
- CVE-2026-114103 no longer affects this package ▲ security
- CVE-2026-39244 no longer affects this package ▲ security
- CVE-2026-102282 no longer affects this package ▲ security
- Capabilities: pass → unverified ▼ functional
- Tool coverage: 100 → unverified ▼ functional
- First check of Schema quality: unverified functional
- Package version: 1.0.10 → 1.0.17 functional
- 24 Oct 26 0
- CVE-2023-54404 affects this package: high ▼ security
- 22 Oct 26 0
- CVE-2026-114104 affects this package: high ▼ security
- CVE-2026-114102 affects this package: high ▼ security
- CVE-2026-114103 affects this package: high ▼ security
- GHSA-8238-w5pm-2374 no longer affects this package ▲ security
- GHSA-c6fg-446q-cg94 no longer affects this package ▲ security
- GHSA-p634-w6r4-rjp2 no longer affects this package ▲ security
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 5 Nov 2026 · Analysed npm/ellmos-clatcher-mcp@1.0.17
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 →
Vulnerabilities 1 finding
| ID | CVE | Severity | Vector | Fix available |
|---|---|---|---|---|
| GHSA-mrhx-c7xc-m3w5 | CVE-2023-54404 | high | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | yes |
Background: What a vulnerability scan can and cannot prove →
Dependencies 158 packages
| Packages resolved | 158 |
|---|---|
| Stale | 45 |
| 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 →
archive ~94
Create, extract, or list ZIP archives.
| Name | Type | Req | Description |
|---|---|---|---|
| action | string | yes | Operation |
| archive_path | string | yes | Path to the ZIP file |
| dry_run | boolean | – | Preview create/extract without changing files |
| extract_to | string | – | Extraction directory (for extract) |
| overwrite | boolean | – | Allow extraction to overwrite existing files |
| source_paths | array | – | Files/directories to add (for create) |
No output schema declared.
No examples provided.
batch_rename ~106
Rename multiple files using regex pattern, prefix/suffix, or counter. Always preview first with dry_run=true.
| Name | Type | Req | Description |
|---|---|---|---|
| directory | string | yes | Directory containing files to rename |
| dry_run | boolean | – | true = preview only |
| extensions | string | – | Comma-separated extensions to filter (e.g. 'jpg,png') |
| pattern | string | yes | Regex pattern to match in filenames |
| replacement | string | yes | Replacement string ($1, $2 for capture groups) |
No output schema declared.
No examples provided.
checksum ~60
Calculate file hash (SHA256, MD5, SHA1, SHA512). Optionally verify against expected hash.
| Name | Type | Req | Description |
|---|---|---|---|
| algorithm | string | – | – |
| expected | string | – | Expected hash to verify against |
| path | string | yes | Path to the file |
No output schema declared.
No examples provided.
cleanup_file ~97
Remove BOM, trailing whitespace, fix line endings, remove NUL bytes. Configurable per-option.
| Name | Type | Req | Description |
|---|---|---|---|
| dry_run | boolean | – | – |
| ensure_final_newline | boolean | – | – |
| normalize_line_endings | string | – | – |
| path | string | yes | Path to the file |
| remove_bom | boolean | – | – |
| remove_nul_bytes | boolean | – | – |
| remove_trailing_whitespace | boolean | – | – |
No output schema declared.
No examples provided.
convert_format ~92
Convert between data formats: JSON, YAML, TOML, XML, CSV, INI. Reads input file and writes output file.
| Name | Type | Req | Description |
|---|---|---|---|
| dry_run | boolean | – | Preview conversion without writing the target file |
| input_format | string | yes | Source format |
| input_path | string | yes | Source file path |
| output_format | string | yes | Target format |
| output_path | string | yes | Target file path |
No output schema declared.
No examples provided.
detect_dupes ~94
Find duplicate files in a directory by content hash (SHA256). Groups files with identical content.
| Name | Type | Req | Description |
|---|---|---|---|
| directory | string | yes | Directory to scan |
| extensions | string | – | Comma-separated file extensions to check (e.g. 'py,js,ts'). Empty = all files |
| min_size | number | – | Minimum file size in bytes (skip empty files) |
| recursive | boolean | – | Scan subdirectories |
No output schema declared.
No examples provided.
fix_encoding ~60
Fix encoding issues: detect and repair BOM, broken UTF-8, cp1252 artifacts. Common on Windows.
| Name | Type | Req | Description |
|---|---|---|---|
| dry_run | boolean | – | true = analyze only, false = write fixed file |
| path | string | yes | Path to the file |
No output schema declared.
No examples provided.
fix_json ~63
Repair broken JSON: strip comments, fix trailing commas, convert single quotes, remove BOM/NUL. Supports dry_run mode.
| Name | Type | Req | Description |
|---|---|---|---|
| dry_run | boolean | – | true = analyze only, false = write repaired file |
| path | string | yes | Path to the JSON file |
No output schema declared.
No examples provided.
fix_umlauts ~60
Fix broken German umlauts from double-encoding or cp1252 artifacts (ä→ä, ö→ö, etc.)
| Name | Type | Req | Description |
|---|---|---|---|
| dry_run | boolean | – | true = analyze only |
| path | string | yes | Path to the file |
No output schema declared.
No examples provided.
folder_diff ~62
Compare two directories, or take a snapshot and compare on next call. Shows new, modified, and deleted files.
| Name | Type | Req | Description |
|---|---|---|---|
| compare_to | string | – | Second directory to compare against. Omit for snapshot mode. |
| directory | string | yes | Directory to compare/snapshot |
No output schema declared.
No examples provided.
regex_test ~62
Test a regex pattern against text. Shows all matches with groups and positions.
| Name | Type | Req | Description |
|---|---|---|---|
| flags | string | – | Regex flags (g, i, m, s, u) |
| pattern | string | yes | Regex pattern |
| text | string | yes | Text to test against |
No output schema declared.
No examples provided.
scan_emoji ~54
Scan code files for emoji characters. Useful for finding accidental emojis in source code.
| Name | Type | Req | Description |
|---|---|---|---|
| directory | string | yes | Directory to scan |
| extensions | string | – | Comma-separated file extensions |
| recursive | boolean | – | – |
No output schema declared.
No examples provided.
How do I install the Ellmos Clatcher MCP server?
Ellmos Clatcher MCP runs locally as an npm package, launched with npx -y ellmos-clatcher-mcp. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.
npm · ellmos-clatcher-mcp
claude mcp add ellmos-ai-ellmos-clatcher-mcp -- npx -y ellmos-clatcher-mcp
What is the Ellmos Clatcher MCP server?
Ellmos Clatcher MCP is listed in the public MCP registry as io.github.ellmos-ai/ellmos-clatcher-mcp. Utility MCP server: JSON repair, encoding fixes, conversion, duplicates, batch rename, archives. This page covers its npm package (ellmos-clatcher-mcp).
Is the Ellmos Clatcher MCP server safe to use?
Ellmos Clatcher MCP scores 77 out of 100 on VerifyMCP. We recorded 1 known advisory against it as of 5 November 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 Ellmos Clatcher MCP server expose?
Ellmos Clatcher MCP exposes 12 tools: fix_json, fix_encoding, fix_umlauts, convert_format, detect_dupes, and 7 more. Their descriptions and schemas cost roughly 904 tokens of context every time the server is loaded.
Is the Ellmos Clatcher MCP server still maintained?
Ellmos Clatcher MCP is still listed as active in the MCP registry. We last reached this channel on 5 November 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 Ellmos Clatcher MCP server under?
Ellmos Clatcher MCP declares the MIT licence, which is OSI-approved. That covers the source only, and says nothing about the cost of any service it calls.