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MCP servers without declared environment variables

The manifest explicitly declares no environment variable. That is the empty value of a piece of original data, not "not recorded".

34,377 servers 80% of 42,727 in the directory

This category in numbers

The most frequent value per property, counted across the entries of this category. The full distribution is further down.

Entries

Filter further

Entries 20,701 to 20,750 of 34,377

Entries
Ullas Opskrifter (Danish recipes)dk.ullasopskrifter/recipes
Ultimate Web Scrapercom.ultimatewebscraper/web-scraper
Ultiplaceio.github.Realitim/ultiplace-mcp
Ultra Promptco.ultraprompt/ultra-prompt
UltraMemoryio.github.LogicLabsAI/ultramemory-mcp
UltraTech Pakistanpk.utechit/utechit
Ultralayerio.github.UltralayerHQ/ultralayer
Ulule — Crowdfundingcom.ulule/mcp-public
UmbHost — Umbraco hosting storefrontnet.umbhost/umbhost-mcp
UmbPanel — UmbHost GreenStack managementnet.umbhost/umbpanel-mcp
Umbraio.github.elberacasa/umbra
Umesh Malik Blog & Profilecom.umesh-malik/blog-mcp
Umloutio.github.dmkorj/umlout
Umlsio.github.pipeworx-io/umls
Un Sdgio.github.pipeworx-io/un-sdg
Un-Defaultio.github.NomadBuilder/un-default
UnClickworld.unclick/mcp-server
UnRemind.meio.github.esfih/unremind-me
UnRemind.me Submitio.github.esfih/unremind-me-submit
Unblock by Agent Railsso.rails/unblock
Unblockdai.unblockd/unblockd
Unblockedcom.getunblocked/unblocked-mcp
UnboxAPI — Hospitality Reservation MCP Serverio.github.founder-OmniPA/unboxapi
Unbrowse sites: one website's tools per serverio.github.unbrowse-ai/sites
Uncertainty Calculatorio.github.quentintruong/uncertainty-calculator
Uncountablecom.uncountable/mcp
Undercartco.undercart/undercart
Underlayercom.underlayerhq/underlayer
Underpriced AIcom.underpricedai/underpriced-ai
Understand Anything - MCPio.github.uamcp/ua-mcp
Undertow market liquidity and exit-cost toolsio.github.beepboop2025/undertow
UndetectedGPTai.undetectedgpt/humanizer
Uneedbest.uneed/directory
Unesco Uisio.github.pipeworx-io/unesco-uis
UnfoldIP Patent Searchcom.unfoldip/patent-search
Unhcrio.github.pipeworx-io/unhcr
UniAffitti Room Findercom.uniaffitti.www/room-finder
UniBio Intelligenceio.github.unibio-intelligence/ubi
UniProt MCPio.github.josefdc/uniprot-mcp
UniProt MCPio.github.smaniches/uniprot-mcp
Unicefio.github.pipeworx-io/unicef
Unicodeio.github.pipeworx-io/unicode
Unicode Logic Kitio.github.fvossel/unicode-logic-kit
Unicode code-point length, text discardedio.github.sadri-dridi/unicode-len
Unicode word charset, value discardedio.github.sadri-dridi/word-ok
Unicode word count, text discardedio.github.sadri-dridi/word-n
Unicode-LEio.github.nolindnaidoo/unicode-le
UnicodeKitio.github.mamuso/unicodekit
Unicorn Screenervc.unicornscreener/unicorn-screener
Unicred MCPio.github.mcp-dir/unicred-mcp

All 34,377 entries in the list, with filters and pagination

What this category selects

What this category selects
Environment variables (raw)nothing declared
measured directly

A derived value carries its original data beside it; the derivation rule is published, with a version, on the methodology page.

Caveats, distribution and query

What this category does not say

  • Environment variables (raw) is the complete, sorted enumeration of what a manifest declares. So "nothing declared" means exactly that and nothing else: an entry that also declares something different is not in this category.
  • The empty value means "the source explicitly declares nothing here". It does not mean "not recorded": what was never recorded is in no category of this property.

What is measured is what a manifest declares, not what a piece of software does. This registry fetches no repository URL, no endpoint and no package index; nothing here is verified. Which value comes from which source, and by which rule it was formed, is set out in the Methodology.

Every sentence here follows from the condition above, not from an assessment.

How this category is distributed

Repository platform (raw)

34,359
Repository platform (raw)
github22,536 66 %
nothing declared11,750 34 %
gitlab73 0.2 %

not recorded for 18 entries

Repository URL listed

34,377
Repository URL listed
yes22,620 66 %
no11,757 34 %

Delivery form (raw)

34,359
Delivery form (raw)
remote25,207 73 %
package7,921 23 %
package and remote734 2.1 %
neither497 1.4 %

not recorded for 18 entries

Execution location

34,377
Execution location
remote25,358 74 %
local9,019 26 %

Icon formats (raw)

34,359
Icon formats (raw)
nothing declared30,450 89 %
image/png2,354 6.8 %
image/png, image/svg+xml811 2.4 %
image/svg+xml656 1.9 %
image/webp47 0.1 %
image/jpeg31 0.1 %

and 6 more values · not recorded for 18 entries

Schema version of the raw record (raw)

34,359
Schema version of the raw record (raw)
https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json31,958 93 %
https://static.modelcontextprotocol.io/schemas/2025-09-29/server.schema.json1,271 3.7 %
https://static.modelcontextprotocol.io/schemas/2025-07-09/server.schema.json499 1.5 %
https://static.modelcontextprotocol.io/schemas/2025-10-17/server.schema.json491 1.4 %
https://static.modelcontextprotocol.io/schemas/2025-09-16/server.schema.json132 0.4 %
https://static.modelcontextprotocol.org/schemas/2025-12-11/server.schema.json3 0.0 %

and 5 more values · not recorded for 18 entries

Per property, the measured values inside this category. The share refers to the 34,377 entries of the category, not to the registry. Shown are 6 of 8 properties: those whose values spread the most inside this category.

The same category through the interface

curl -s "https://api.tracevero.com/v1/eintraege?art=mcp_server&roh_umgebungsvariablen=&grenze=200"

The command carries exactly the condition of this page. 34,377 entries at 200 each are 172 requests; the total is in the X-Gesamt header.

Changes to these entries

https://tracevero.com/aenderungen.atom?thema=ohne-umgebungsvariablen

Both addresses narrow the change stream to exactly the entries in this category. The feed carries an identifier of its own, so a feed reader keeps it apart from the full stream.

Categories sharing entries with this one

MCP servers without declared required secrets 36,559 entries in this category32,082 shared MCP servers without a declared package registry 25,719 entries in this category25,719 shared Remotely executed MCP servers 25,476 entries in this category25,358 shared MCP servers over streamable-http only 24,232 entries in this category24,130 shared MCP servers with a repository URL 30,564 entries in this category22,620 shared Remote MCP servers with a repository URL 14,228 entries in this category14,121 shared

Per neighbour its own size and the counted number of shared entries. A category without a single shared entry is not listed here.

tracevero · https://tracevero.com/themen/ohne-umgebungsvariablen?seite=415