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MCP servers over stdio only

MCP servers whose manifest declares stdio as its only transport. They run as a local process and communicate over standard input and output.

13,862 servers 32% 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 3,501 to 3,550 of 13,862

Entries
RAGScoreio.github.HZYAI/ragscore
RAWG Games MCP by UnClickio.github.malamutemayhem/rawg
RAWThinkio.github.ygtalp/rawthink-mcp
RCA-MCPio.github.dave1362/rca-mcp-connector
RCLLai.rcll/fleet-memory
RCS Campaignscom.rcs-campaigns/campaigns
RCSB PDBio.github.rcsb/rcsb-mcp
RDL MCP Serverio.github.bethmaloney/rdl-mcp
RE-call MCP Memory Serverio.github.GiulioDER/re-call
REAio.github.morluto/rea
REAPER MCPcom.twelvetake/reaper-mcp
REGON (Polish business register)io.github.SmartMobileHouse/regon-mcp
REST Countries MCP by UnClickio.github.malamutemayhem/restcountries
RFP Hubio.github.The-RFP-Hub/rfp-hub
RGX — Snap Router + RyRank + Pricing-Truthio.github.trigeochiral/rgx
RIPE Atlasio.github.jrelph/ripe-atlas
RLM Toolsio.github.stefanoshea/rlm-tools
ROBINS-I V2 MCPcom.blackswancausallabs/robins-i-mcp
RONIN Web Researchwebsite.agratys.seller/ronin-buyer
ROOT MCP Serverio.github.omazapa/root-mcp
RPG Maker MV Ultimate MCPio.github.DiegoLopez0208/rpgmaker-mv-ultimate
RTFMio.github.roomi-fields/rtfm
RTL Lint MCPio.github.jaspresi/rtl-lint-mcp
RTL awareness for coding agentsio.github.kahlelhawary-art/rtl-mcp
RZD Tickets MCPio.github.ex3lite/mcp-rzd-tickets
Ra Payai.rapay/mcp-server
Rabbytteio.github.marklanetech/rabbytte
RaceHooksio.github.racehooks/racehooks-mcp
RacterMXio.github.racter-ciso/ractermx
Radio Browser MCP by UnClickio.github.malamutemayhem/radiobrowser
RadioChronio.github.sergii-ziborov/radiochron
Railio.github.tstockham96/rail-mcp
Rails AI Contextio.github.crisnahine/rails-ai-context
Rails Agent Skillsio.github.igmarin/rails-agent-skills-mcp
Rancherio.github.asklokesh/rancher-mcp-server
Random Designio.github.yanislav-igonin/random-design-mcp
RankCLIio.github.integrallis/rankcli-mcp-server
RankFabrikio.github.finalburner/rankfabrik-mcp
RankJotio.github.epolat/rankjot-mcp
Rankratio.github.psyb0t/rankrat
Raposa Aval — human approvalgroup.raposa/raposa-mcp
RaroCUAio.github.mectrojohnny/raro-cua
Ratary Memory MCPio.github.ontorata/ratary
Raven — Solana Token Verificationio.github.billybotticelli4u-collab/raven-verify
Raw SQL MCPio.github.KifoPL/RawSqlMcp
Razz Gamesio.github.razz-games/razz
ReClipio.github.yagyaanshK/reclip
ReactFrameio.github.AhmetLoca/reactframe
Readoio.github.WatermelonBros/reado
ReadyAgentsio.github.readyagentsdev/readyagents

All 13,862 entries in the list, with filters and pagination

What this category selects

What this category selects
Transports (raw)stdio
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

  • Transports (raw) is the complete, sorted enumeration of what a manifest declares. So "stdio" means exactly that and nothing else: an entry that also declares something different is not in this category.
  • This category shares 13,856 of its 13,862 entries with "MCP servers available as a package only" (14,911). Both are measured from different original data; that they hit almost the same set is a finding, not a rule.

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

Required secrets declared

13,862
Required secrets declared
no10,965 79 %
yes2,897 21 %

Schema version of the raw record (raw)

13,856
Schema version of the raw record (raw)
https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json12,829 93 %
https://static.modelcontextprotocol.io/schemas/2025-09-29/server.schema.json542 3.9 %
https://static.modelcontextprotocol.io/schemas/2025-10-17/server.schema.json322 2.3 %
https://static.modelcontextprotocol.io/schemas/2025-07-09/server.schema.json123 0.9 %
https://static.modelcontextprotocol.io/schemas/2025-09-16/server.schema.json37 0.3 %
https://static.modelcontextprotocol.org/schemas/2025-12-11/server.schema.json2 0.0 %

and 1 more values · not recorded for 6 entries

Repository platform (raw)

13,856
Repository platform (raw)
github13,234 95 %
nothing declared608 4.4 %
gitlab14 0.1 %

not recorded for 6 entries

Repository URL listed

13,862
Repository URL listed
yes13,254 96 %
no608 4.4 %

Icon formats (raw)

13,856
Icon formats (raw)
nothing declared13,293 96 %
image/png405 2.9 %
image/svg+xml102 0.7 %
image/png, image/svg+xml51 0.4 %
image/jpeg3 0.0 %
image/webp2 0.0 %

not recorded for 6 entries

Path argument present

13,862
Path argument present
no13,434 97 %
yes428 3.1 %

Per property, the measured values inside this category. The share refers to the 13,862 entries of the category, not to the registry.

The same category through the interface

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

The command carries exactly the condition of this page. 13,862 entries at 200 each are 70 requests; the total is in the X-Gesamt header.

Changes to these entries

https://tracevero.com/aenderungen.atom?thema=transport-stdio

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 available as a package only 14,911 entries in this category13,856 shared Locally executed MCP servers 17,251 entries in this category13,862 shared Local MCP servers with a repository URL 16,336 entries in this category13,254 shared Local MCP servers without declared required secrets 13,393 entries in this category10,965 shared MCP servers over stdio, as an npm package only 8,771 entries in this category8,771 shared Local MCP servers as an npm package only 10,184 entries in this category8,771 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/transport-stdio?seite=71