Utility MCP server: JSON repair, encoding fixes, conversion, duplicates, batch rename, archives.
Utility MCP server: JSON repair, encoding fixes, conversion, duplicates, batch rename, archives. Exposed over MCP by the ellmos clatcher mcp mcp server, that capability becomes something an assistant can invoke while it works, not something you go and do afterwards.
Use Clatcher when your agent needs reliable local maintenance tools for text files, data files, and project folders: repair invalid JSON, normalize encodings, convert formats, compare folders, rename files safely, and verify checksums without leaving the MCP workflow.
Everything the assistant can do here goes through one of these:
fix_json — Repair broken JSON: strip comments, trailing commas, single quotes, BOM/NULfix_encoding — Fix encoding issues: BOM removal, double-encoded UTF-8, cp1252 artifactsfix_umlauts — Fix broken German umlauts from double-encoding (e.g. ä -> ä)convert_format — Convert between JSON, YAML, TOML, XML, CSV, and INIdetect_dupes — Find duplicate files by content hash (SHA256), grouped by identical contentfolder_diff — Compare two directories, or take a snapshot and diff on next callbatch_rename — Rename files using regex patterns, with dry-run previewarchive — Create, extract, or list ZIP archiveschecksum — Calculate file hashes (SHA256, MD5, SHA1, SHA512) with optional verificationcleanup_file — Remove BOM, trailing whitespace, fix line endings, strip NUL bytesscan_emoji — Find emoji characters in code filesregex_test — Test regex patterns against text, showing all matches with groupsBeing a remote server, there is no local install. You register the endpoint with your client, authorise it once, and the tools appear.
Plenty of developer tooling servers cover similar ground. The differences that matter in practice are scope of access and how much setup stands between you and a working tool call. Ellmos Clatcher MCP's toolset — fix_json, fix_encoding, fix_umlauts and 9 more — is a fair guide to whether it matches your workflow. It is maintained by ellmos-ai; worth a glance at recent repository activity before you build anything load-bearing on it.
SyncDev reviews every entry in this directory against the project's own documentation before publishing, and revisits them as servers change.
| Tool | What it does |
|---|---|
| fix_json | Repair broken JSON: strip comments, trailing commas, single quotes, BOM/NUL |
| fix_encoding | Fix encoding issues: BOM removal, double-encoded UTF-8, cp1252 artifacts |
| fix_umlauts | Fix broken German umlauts from double-encoding (e.g. ä -> ä) |
| convert_format | Convert between JSON, YAML, TOML, XML, CSV, and INI |
| detect_dupes | Find duplicate files by content hash (SHA256), grouped by identical content |
| folder_diff | Compare two directories, or take a snapshot and diff on next call |
| batch_rename | Rename files using regex patterns, with dry-run preview |
| archive | Create, extract, or list ZIP archives |
| checksum | Calculate file hashes (SHA256, MD5, SHA1, SHA512) with optional verification |
| cleanup_file | Remove BOM, trailing whitespace, fix line endings, strip NUL bytes |
| scan_emoji | Find emoji characters in code files |
| regex_test | Test regex patterns against text, showing all matches with groups |
{
"mcpServers": {
"ellmos-clatcher": {
"command": "npx",
"args": ["-y", "ellmos-clatcher-mcp"]
}
}
}Add to claude_desktop_config.json, then restart Claude Desktop.
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