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
- 22,620 66 % Repository URL listed: yes
- 25,358 74 % Execution location: remote
- 22,536 66 % Repository platform (raw): github
- 25,207 73 % Delivery form (raw): remote
The most frequent value per property, counted across the entries of this category. The full distribution is further down.
Entries
Filter further
- Execution location: local
- Execution location: remote
- Required secrets declared: no
- Required secrets declared: yes
- Repository URL listed: yes
- Repository URL listed: no
- recently updated first
Entries 13,701 to 13,750 of 34,377
| O'Reilly Expert MCP Server | io.github.oreillymedia/oreilly-expert |
|---|---|
| O'Reilly Media MCP Server | io.github.oreillymedia/oreilly-mcp-server |
| O*NET Occupational Data | com.olyport/onet |
| O-Exchange Compute Futures | host.workbuddy.app.a959e52db0499cef3/oexchange-compute-futures |
| OAB Cadastro de Advogados | io.github.mcp-dir/oab_advogados-mcp |
| OAIA Arena | fun.oaia/arena |
| OBD Vault | io.github.bahdanhal/obd-vault |
| OBTO | co.obto/obto |
| OCI Pricing | io.github.jasonwilbur/oci-pricing-mcp |
| OCI image reference shape, name discarded | io.github.sadri-dridi/oci-ref-ok |
| OCL Context Layer | io.github.Nantiai/ocl-standard |
| OCOLO Project Requests | io.ocolo.www/project-requests |
| OCR Text Extraction API | io.github.Br0ski777/ocr-extract |
| ODDWOOD Barcode Tool | io.github.oddwood-x/barcode-tool |
| ODSP Remote MCP Server | com.microsoft/workiq-odspremoteserver |
| OECD MCP Server | io.github.isakskogstad/oecd-mcp |
| OFAC (Sanções EUA) | io.github.mcp-dir/ofac-mcp |
| OFAC SDN Screening | com.bonissystems/ofac-sdn-screening |
| OFAC Wallet Screen, DNS & Email Auth (x402) | dev.workers.sdnscreen.sdn-screen-x402/agent-preflight |
| OFACScreen Sanctions Screening | com.ofacscreen/screening |
| OG Stamp | com.ogstamp/og |
| OGA Antibody Validation | io.github.onlygoodantibodies/oga-antibodies |
| OGForge MCP | io.github.dpozimski/ogforge-mcp |
| OIO | app.oio/oio |
| OKC Custom Home & Remodel Readiness Planner | Cosmopolitan Company | io.github.janoliverautomation-stack/okcluxuryhomeplanner-com |
| OKC Disc & Sciatica Next-Step Checker | Precision Care Chiropractic | io.github.janoliverautomation-stack/okcsciaticacheck-com |
| OKC HVAC Calculator | Repair or Replace Decision Tool | io.github.janoliverautomation-stack/okchvaccalculator-com |
| OKC SEO Site Audit | media.okcseo/site-audit |
| OKR Studio | io.okrstud/mcp |
| OKX MCP Server | io.github.aahl/mcp-okx |
| OLVM AIops | io.github.AIops-tools/olvm-aiops |
| OMDb Movies MCP by UnClick | io.github.malamutemayhem/omdb |
| OMEGA Memory | io.github.omega-memory/omega-memory |
| ONCE | app.once/mcp |
| ONCE — AI Agent Huddle | io.github.londoncoding/once |
| ONCE — Exactly-Once Reliability for AI Agent Actions | io.github.GSterlingPress/once |
| ONE HEART eSIM | com.oneheartesim.mcp/esim |
| ONES | com.ones/ones |
| ONR: Mapa do Registro de Imóveis | io.github.mcp-dir/onr_mapa_registro_imoveis-mcp |
| OODS Foundry | com.oods-foundry/foundry |
| OOTWOracle — Psychedelic Medicine Intelligence | com.ootworacle.www/predictions-server |
| OPC UA Modeler | io.github.node-opcua/node-opcua-modeler-mcp-server |
| OPC UA NodeSet Gate | io.github.ChanghuLiu/opc-ua-nodeset-compatibility-gate |
| OPX | dev.opx-status/opx |
| ORA · ORUM | io.github.fomosdeimos-gif/ora-mcp |
| ORANO MCP Server | io.github.infotik/orano-mcp-server |
| ORANO Personal Context MCP | io.github.manuvamp/orano-personal-context-mcp |
| ORC magic-byte check, file discarded | io.github.sadri-dridi/orc-magic |
| ORCID shape, id discarded | io.github.sadri-dridi/orcid-ok |
| ORYKSA AI Employees | com.oryksa/ai-employees |
All 34,377 entries in the list, with filters and pagination
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| github | 22,536 66 % |
|---|---|
| nothing declared | 11,750 34 % |
| gitlab | 73 0.2 % |
not recorded for 18 entries
Repository URL listed
34,377| yes | 22,620 66 % |
|---|---|
| no | 11,757 34 % |
Delivery form (raw)
34,359| remote | 25,207 73 % |
|---|---|
| package | 7,921 23 % |
| package and remote | 734 2.1 % |
| neither | 497 1.4 % |
not recorded for 18 entries
Execution location
34,377| remote | 25,358 74 % |
|---|---|
| local | 9,019 26 % |
Icon formats (raw)
34,359| nothing declared | 30,450 89 % |
|---|---|
| image/png | 2,354 6.8 % |
| image/png, image/svg+xml | 811 2.4 % |
| image/svg+xml | 656 1.9 % |
| image/webp | 47 0.1 % |
| image/jpeg | 31 0.1 % |
and 6 more values · not recorded for 18 entries
Schema version of the raw record (raw)
34,359| https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json | 31,958 93 % |
|---|---|
| https://static.modelcontextprotocol.io/schemas/2025-09-29/server.schema.json | 1,271 3.7 % |
| https://static.modelcontextprotocol.io/schemas/2025-07-09/server.schema.json | 499 1.5 % |
| https://static.modelcontextprotocol.io/schemas/2025-10-17/server.schema.json | 491 1.4 % |
| https://static.modelcontextprotocol.io/schemas/2025-09-16/server.schema.json | 132 0.4 % |
| https://static.modelcontextprotocol.org/schemas/2025-12-11/server.schema.json | 3 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
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=275