io.github.fieldcure/essentials
NUGET · FIELDCURE.MCP.ESSENTIALS
Essential MCP server: HTTP, web search, downloads, Wolfram|Alpha, shell, JS, file I/O, memory.
Available components
Last scanned (1 day ago)
Scores higher than 78% of NuGet servers
Category Developer Tools
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 Security100
- 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
- No production dependencies, so there is no dependency health to assess. View diagnostics → Pass
Provenance & Transparency45
- Source repository is publicly reachable at the declared URL. View diagnostics → Pass
- Build provenance not yet verified. View diagnostics → Unverified
- Clear OSI-approved license (MIT).Pass
- Actively maintained (last published 162 days ago).Pass
- Disclosure check failed: no security disclosure policy was found in the source repository. See how to fix → Fail
Schema Quality & AI Usability74
- AI-judged instruction clarity (excellent).Pass
- Context-footprint check failed: tool/resource definitions use about 2875 tokens (~143/item across 20 items; 20 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 Management97
- Stability observed for 29 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 Safety88
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- 1 of 2 tool(s) whose name or description implies an irreversible operation declare an MCP destructiveHint annotation; "forget" implies "delete" and declares no destructiveHint at all, which the MCP spec reads as destructive by default. See how to fix → Partial
- An AI judge read all 20 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.
- 3 Nov 26 −1
- Stability: pass → 0.93 functional
- 2 Nov 26 0
- Security disclosure: unverified → fail ▼ functional
- 1 Nov 26 0
- Security disclosure: fail → unverified ▼ functional
- 28 Oct 26 +1
- Stability: 0.97 → pass security
- 27 Oct 26 −1
- Stability: pass → 0.97 functional
- 21 Oct 26 +1
- Stability: 0.97 → pass security
- 19 Oct 26 −1
- Stability: pass → 0.93 functional
- 17 Oct 26 +3
- Stability: 0.83 → pass 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 4 Nov 2026 · Analysed nuget/FieldCure.Mcp.Essentials@2.6.1
Provenance Inconclusive
We could not complete the check, so nothing is claimed either way. This is a gap on our side, not a finding about the package.
| Result | Inconclusive |
|---|---|
| Ecosystem | nuget |
| Reason | Signature present, unverified |
Signer
| Signed as | Author signature |
|---|---|
| Subject | CN=Fieldcure Co.\, Ltd.,O=Fieldcure Co.\, Ltd.,L=Seongbuk-gu,ST=Seoul,C=KR |
| Issuer | CN=GlobalSign GCC R45 CodeSigning CA 2020,O=GlobalSign nv-sa,C=BE |
| Valid from | 17 Jan 2024 |
| Valid until | 17 Jan 2027 |
Countersigner
| Signed as | Repository signature, names nuget.org |
|---|---|
| Subject | CN=NuGet.org Repository by Microsoft,O=NuGet.org Repository by Microsoft,L=Redmond,ST=Washington,C=US |
| Issuer | CN=DigiCert Trusted G4 Code Signing RSA4096 SHA384 2021 CA1,O=DigiCert\, Inc.,C=US |
| Valid from | 23 Feb 2024 |
| Valid until | 18 May 2027 |
| Service index | https://api.nuget.org/v3/index.json |
| Owners | FieldCure |
Background: How many MCP packages publish verified provenance →
Dependencies 0 packages
| Packages resolved | 0 |
|---|---|
| Tree resolution | Complete |
Background: SBOMs and build attestations, explained →
Registry declarations For information only
What the registry and the package's own manifest say about this version. The publisher or the registry writes these, nothing here is verified, and none of it affects the score.
| Repository | https://github.com/fieldcure/fieldcure-mcp-essentials |
|---|---|
| Repository type | git |
| Commit | 146e1895fd9e2eca13d74436d17867f72a8207e1 |
| Project URL | https://github.com/fieldcure/fieldcure-mcp-essentials |
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 →
download_file Download file ~222
Downloads a file from a URL and saves it to a local path. RECOMMENDED for: - Saving PDFs, images, datasets, archives, or any binary file from the web - Keeping the original file bytes for later use AVOID for: - Reading web page content or extracting text -- use web_fetch instead - Making API calls or sending POST requests -- use http_request instead - Fetching HTML to convert to markdown -- use web_fetch instead Parameters: - url (required): The URL to download from - save_path (optional): File path to save to. Relative paths resolve under the configured download_directory. - overwrite (optional, default false): Whether to overwrite if file already exists
| Name | Type | Req | Description |
|---|---|---|---|
| overwrite | boolean | – | Whether to overwrite if the destination file already exists (default: false) |
| save_path | string|null | – | File path to save to. Relative paths resolve under the configured download_directory. If omitted, a filename is inferred from the response or URL. |
| url | string | yes | URL to download from (http or https) |
No output schema declared.
No examples provided.
forget ~48
Delete a memory by key, or by query to forget multiple matches.
| Name | Type | Req | Description |
|---|---|---|---|
| key | string|null | – | Exact key to delete |
| query | string|null | – | Keyword query — deletes all matching memories |
No output schema declared.
No examples provided.
get_environment ~36
Get current system environment info — local time, timezone, OS, hostname, username, working directory, .NET version. No parameters needed.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
get_search_engine ~56
Return the currently active search engine and its category capabilities. Read-only, no side effects. Use this before calling a category search tool to confirm the active engine supports the category, or to reflect the live engine state in a host UI.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
http_request ~199
Make HTTP requests (GET, POST, PUT, DELETE, PATCH, HEAD). Supports custom headers and request body. Returns status code, headers, and response body.
| Name | Type | Req | Description |
|---|---|---|---|
| body | string|null | – | Request body text |
| headers | string|null | – | Request headers as JSON object, e.g. {"Authorization": "Bearer ..."} |
| max_response_chars | integer|null | – | Maximum characters of response body to return. RECOMMENDED for HTML/text responses when you only need a portion (e.g., 3000-5000). AVOID for JSON API responses — truncated JSON cannot be parsed. Defa… |
| method | string|null | – | HTTP method: GET, POST, PUT, DELETE, PATCH, HEAD (default: GET) |
| timeout_seconds | integer | – | Timeout in seconds (default: 30, max: 120) |
| url | string | yes | Request URL (http or https) |
No output schema declared.
No examples provided.
list_memories ~91
Search and list stored memories. Without a query, returns recent memories. With a query, performs keyword search across all memories.
| Name | Type | Req | Description |
|---|---|---|---|
| limit | integer|null | – | Max results to return (default: 20, max: 100) |
| offset | integer|null | – | Offset for pagination (default: 0) |
| query | string|null | – | Keyword search (FTS5). Null returns recent memories. |
No output schema declared.
No examples provided.
read_file ~146
Read a file. Text files support offset/max_lines pagination. Documents (PDF, DOCX, HWPX, PPTX, XLSX) are parsed into Markdown.
| Name | Type | Req | Description |
|---|---|---|---|
| encoding | string|null | – | File encoding for text files (default: utf-8) |
| max_length | integer | – | Maximum character length for document output (default: 5000, max: 20000) |
| max_lines | integer | – | Maximum lines to read for text files (default: 1000) |
| offset | integer | – | Start line number for text files, 0-based (default: 0) |
| path | string | yes | File path (absolute or relative to working directory) |
No output schema declared.
No examples provided.
remember ~54
Store a memory. If the key already exists, the value is updated.
| Name | Type | Req | Description |
|---|---|---|---|
| key | string|null | – | Short identifier for this memory (e.g., 'preferred_language') |
| value | string|null | – | The content to remember |
No output schema declared.
No examples provided.
run_command ~281
Execute shell commands. Returns stdout, stderr, exit code, shell_used, and truncation flags. Use shell='pwsh' for PowerShell Core commands, shell='powershell' on Windows when pwsh is unavailable, or shell='cmd'/'bash'/'sh' when that syntax is required. For verbose commands, redirect to a file and read selectively, or pass max_output_chars to cap the response. Output is truncated by default; stdout_truncated and stderr_truncated report incomplete streams.
| Name | Type | Req | Description |
|---|---|---|---|
| command | string | yes | Shell command to execute |
| environment | string|null | – | Additional environment variables as JSON object, e.g. {"KEY": "value"} |
| max_output_chars | integer|null | – | Maximum characters to return per output stream (stdout and stderr independently). Default: 100000. Truncated streams include a marker and set stdout_truncated/stderr_truncated. |
| shell | string|null | – | Shell to execute the command in. Options: auto (default: cmd.exe on Windows, /bin/sh on Unix), pwsh (PowerShell Core), powershell (Windows PowerShell), cmd, bash, sh. Explicit shells fail if unavaila… |
| timeout_seconds | integer | – | Timeout in seconds (default: 30, max: 300) |
| working_directory | string|null | – | Working directory (default: user home) |
No output schema declared.
No examples provided.
run_javascript ~129
Execute JavaScript in a sandboxed engine (no file/network access). Use for math calculations, data transformation, JSON processing, regex, encoding/decoding, and date calculations. Variables can be injected into the script scope.
| Name | Type | Req | Description |
|---|---|---|---|
| code | string|null | – | JavaScript code (expression or script). The last expression's value is returned. |
| timeout_seconds | integer | – | Timeout in seconds (default: 5, max: 30) |
| variables | string|null | – | Variables to inject into JS scope as JSON object, e.g. {"data": [...], "x": 42} |
No output schema declared.
No examples provided.
search_files ~125
Search for files by name pattern (glob) and optionally by content. Returns file paths, sizes, and modification dates. Content matches include a preview line.
| Name | Type | Req | Description |
|---|---|---|---|
| content_pattern | string|null | – | Search file content (case-insensitive grep). Only text files are searched. |
| directory | string | yes | Directory to search in |
| max_results | integer | – | Maximum results (default: 100) |
| pattern | string|null | – | Glob pattern, e.g. "*.json", "*.cs" (default: *) |
| recursive | boolean | – | Search subdirectories (default: true) |
No output schema declared.
No examples provided.
search_images ~156
Search images and return URLs, thumbnails, dimensions, and source info. Requires a category-capable engine (SerpApi or Serper). Returns an error if the active engine does not support image search — use set_search_engine to switch.
| Name | Type | Req | Description |
|---|---|---|---|
| image_size | string|null | – | Filter by image size: 'large', 'medium', 'icon' |
| image_type | string|null | – | Filter by image type: 'photo', 'clipart', 'lineart' |
| max_results | integer | – | Maximum number of results to return (default: 10) |
| query | string | yes | Image search query |
| region | string|null | – | Region code for localized results (e.g. 'ko-kr', 'en-us') |
No output schema declared.
No examples provided.
search_news ~153
Search recent news articles with title, URL, snippet, source, and publication date. Requires a category-capable engine (SerpApi, Serper, or Tavily). Returns an error if the active engine does not support news search — use set_search_engine to switch.
| Name | Type | Req | Description |
|---|---|---|---|
| max_results | integer | – | Maximum number of results to return (default: 10) |
| query | string | yes | News search query |
| region | string|null | – | Region code for localized results (e.g. 'ko-kr', 'en-us') |
| time_range | string|null | – | Time range filter: '1d' (past day), '1w' (past week), '1m' (past month) |
No output schema declared.
No examples provided.
search_patents ~167
Search patent documents for prior art, filings, and IP information. Requires a category-capable engine (SerpApi or Serper). Returns an error if the active engine does not support patent search — use set_search_engine to switch.
| Name | Type | Req | Description |
|---|---|---|---|
| assignee | string|null | – | Filter by assignee/company name |
| date_range | string|null | – | Priority date range (e.g., '2020-01-01:2024-12-31') |
| inventor | string|null | – | Filter by inventor name |
| max_results | integer | – | Maximum number of results to return (default: 10) |
| query | string | yes | Patent search query |
| region | string|null | – | Region code for localized results (e.g. 'ko-kr', 'en-us') |
No output schema declared.
No examples provided.
search_scholar ~141
Search academic papers and return titles, authors, citation counts, and publication details. Requires a category-capable engine (SerpApi or Serper). Returns an error if the active engine does not support scholar search — use set_search_engine to switch.
| Name | Type | Req | Description |
|---|---|---|---|
| author | string|null | – | Filter by author name |
| cited_by | string|null | – | Find papers citing this paper ID |
| max_results | integer | – | Maximum number of results to return (default: 10) |
| query | string | yes | Academic search query |
| region | string|null | – | Region code for localized results (e.g. 'ko-kr', 'en-us') |
No output schema declared.
No examples provided.
set_search_engine ~117
Switch the active search engine for web_search and category search tools. Available engines: bing, duckduckgo, serper, tavily, serpapi. Paid engines (serper, tavily, serpapi) resolve their API key lazily from environment variables or via MCP Elicitation on the next search invocation — set_search_engine itself does not require a key.
| Name | Type | Req | Description |
|---|---|---|---|
| engine | string | yes | Engine name to activate: 'bing', 'duckduckgo', 'serper', 'tavily', or 'serpapi'. |
No output schema declared.
No examples provided.
web_fetch ~82
Fetch a URL and extract content as Markdown. Supports web pages (HTML) and documents (PDF, DOCX, HWPX, PPTX, XLSX).
| Name | Type | Req | Description |
|---|---|---|---|
| max_length | integer | – | Maximum length of returned text in characters (default: 5000, max: 20000) |
| url | string | yes | URL to fetch (http or https) |
No output schema declared.
No examples provided.
web_search ~111
Search the web and return a list of results with title, URL, and snippet. Use region for localized results (e.g. 'ko-kr' for Korean).
| Name | Type | Req | Description |
|---|---|---|---|
| max_results | integer | – | Maximum number of results to return (default: 5, max: 10) |
| query | string | yes | Search query |
| region | string|null | – | Region code for localized results (e.g. 'ko-kr', 'en-us', 'ja-jp'). Omit for global results. |
No output schema declared.
No examples provided.
wolfram_alpha ~452
Query Wolfram|Alpha computational knowledge engine. Returns structured results with MathML formulas (rendered directly in chat) and chart/plot images. RECOMMENDED for: symbolic math, integrals, differential equations, equation solving, matrix operations, eigenvalues, Nyquist/Bode plots, impedance calculations, scientific constants, unit conversions, plotting, nutrition data, financial data, statistics, date/time calculations. AVOID for: simple arithmetic (use run_javascript), general web search (use web_search), subjective questions, current news. Query guidelines: - Queries MUST be in English. Translate before sending, respond in user's language. - Use simplified keyword form: 'France population' not 'how many people live in France'. - Exponent notation: 6*10^14, NEVER 6e14. - Single-letter variable names: x, y, n (not 'variable1'). - Named physical constants: 'speed of light', not 299792458. - Space between compound units: 'Ω m' not 'Ωm'. - For equations with units, solve without units first. - If response contains assumptions, re-query with the relevant assumption value. - The API auto-reinterprets failed queries. If reinterpretation still fails, try rephrasing. - Include MathML from results directly in your response — it renders natively in chat.
| Name | Type | Req | Description |
|---|---|---|---|
| assumption | string|null | – | Disambiguation assumption from a previous result. Pass the 'input' value as-is (e.g., '*C.pi-_*MathematicalConstant-'). |
| countrycode | string|null | – | ISO country code (e.g., 'KR', 'US'). |
| currency | string|null | – | ISO currency code (e.g., 'KRW', 'USD'). |
| includepodid | string|null | – | Comma-separated pod IDs to include (e.g., 'Result,Plot'). Omit for all pods. |
| input | string | yes | Query in English. Use simplified keyword form. |
| location | string|null | – | Location context (e.g., 'Seoul, Korea'). |
| units | string|null | – | Unit system: 'metric' (default) or 'nonmetric'. |
No output schema declared.
No examples provided.
write_file ~109
Write or append text to a file. Auto-creates parent directories. Returns absolute path and byte count.
| Name | Type | Req | Description |
|---|---|---|---|
| content | string | yes | Content to write |
| create_directory | boolean | – | Auto-create parent directories (default: true) |
| encoding | string|null | – | File encoding (default: utf-8) |
| mode | string|null | – | Write mode: "overwrite" or "append" (default: overwrite) |
| path | string | yes | File path (absolute or relative to working directory) |
No output schema declared.
No examples provided.
How do I install the io.github.fieldcure/essentials MCP server?
io.github.fieldcure/essentials runs locally as a NuGet package, launched with dnx FieldCure.Mcp.Essentials@2.6.1 --yes. Ready-made configuration for Claude, Cursor, VS Code, Codex and 3 more is on this page, copied from each client's own documentation.
nuget · FieldCure.Mcp.Essentials
claude mcp add fieldcure-essentials -- dnx FieldCure.Mcp.Essentials@2.6.1 --yes
What is the io.github.fieldcure/essentials MCP server?
io.github.fieldcure/essentials is an MCP server listed in the public MCP registry as io.github.fieldcure/essentials. Essential MCP server: HTTP, web search, downloads, Wolfram|Alpha, shell, JS, file I/O, memory. This page covers its NuGet package (FieldCure.Mcp.Essentials).
Is the io.github.fieldcure/essentials MCP server safe to use?
io.github.fieldcure/essentials scores 83 out of 100 on VerifyMCP. We found no known CVEs affecting it as of 4 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 io.github.fieldcure/essentials MCP server expose?
io.github.fieldcure/essentials exposes 20 tools: http_request, search_files, download_file, web_search, get_search_engine, and 15 more. Their descriptions and schemas cost roughly 2,875 tokens of context every time the server is loaded.
Is the io.github.fieldcure/essentials MCP server still maintained?
io.github.fieldcure/essentials is still listed as active in the MCP registry. We last reached this channel on 4 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 io.github.fieldcure/essentials MCP server under?
io.github.fieldcure/essentials declares the MIT licence, which is OSI-approved. That covers the source only, and says nothing about the cost of any service it calls.