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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.

13,770 servers 33% of 42,239 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 13,770

Entries
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
Real Dental Costsio.github.tresor4k/realdentalcosts-mcp
Real Fake Dataio.github.przeslijmi/real-fake-data-mcp
RealAgent MCPio.github.zhangxueliang1218/realagent-mcp
RealAgent MCPio.github.RedDateTech/realagent-mcp
Realtime Avatario.github.theinfluencecompany/realtime-avatar
Realurlsio.github.zhouchungong/realurls
Reaper Daemonio.github.wretcher207/reaper-daemon
ReasonGateio.github.cgrtml/reasongate
Rebaseio.github.rebasepro/rebase
Rebilder Agent Readabilitycom.rebilder/mcp-server
Rebuild Dossiercom.parkerfawcett/rebuild-dossier
Rechtspraak (Dutch Case Law)io.github.Prudai/rechtspraak-mcp
Recipes MCP by UnClickio.github.malamutemayhem/meal
Recite MCPio.github.rivradev/recite-mcp
Recolx MCPio.github.uzqw/recolx-mcp
Recon Crypto MCPio.github.szhygulin/recon-crypto-mcp
RecourseOSio.github.recourseOS/recourse
Red Hat Lightspeed MCPio.github.RedHatInsights/insights-mcp
Redact MCPio.github.r3352/redact-mcp
Reddit (RSS)io.github.jorgen-k/reddit-mcp
Reddit Adsio.github.camlowe/mcp-server-reddit-ads
Reddit Ads MCPio.github.mkerchenski/reddit-ads-mcp
Reddit MCP by UnClickio.github.malamutemayhem/reddit
Redis MCP Serverio.github.YawLabs/redis-mcp
Redmineio.github.aarondpn/redmine-mcp
Redmine MCP Serverio.github.igorolv/redmine-mcp-server
Redshift MCP Serverio.github.davidalbertonogueira/redshift-mcp-server
Reel Estate MCPcom.tryreelestate/reel-estate-mcp
Reelierio.github.seldonframe/reelier
Refactoring MCP Serverio.github.marshally/mcp-refactoring
Refinery MCPio.github.LareLabs/refinery-mcp
Regex Labio.github.basitalisandhu/mcp-regex-lab
Regex-LEio.github.nolindnaidoo/regex-le
RegiaBI chartscom.regiabi/chart-mcp
Region Fetchdev.regionfetch/mcp
Regulations.govio.github.1102tools/regulations-gov-mcp
Regulations.govcom.1102tools/regulations-gov-mcp
Reinio.github.bugiiiii11/rein
Reinsio.github.R2Rlabs/reins
Reinsio.github.R2Rlabs/hyperliquid-reins
Relayio.github.mhcoen/mcp-relay
Relayio.github.relayprotocol/relay-mcp
Relayio.github.reservoirprotocol/relay-mcp

All 13,770 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 13,764 of its 13,770 entries with "MCP servers available as a package only" (14,812). 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

13,770
Required secrets declared
no10,889 79 %
yes2,881 21 %

Schema version of the raw record (raw)

13,764
Schema version of the raw record (raw)
https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json12,746 93 %
https://static.modelcontextprotocol.io/schemas/2025-09-29/server.schema.json539 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.json117 0.8 %
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)

13,764
Repository platform (raw)
github13,143 95 %
nothing declared607 4.4 %
gitlab14 0.1 %

not recorded for 6 entries

Repository URL listed

13,770
Repository URL listed
yes13,163 96 %
no607 4.4 %

Icon formats (raw)

13,764
Icon formats (raw)
nothing declared13,205 96 %
image/png404 2.9 %
image/svg+xml102 0.7 %
image/png, image/svg+xml48 0.3 %
image/jpeg3 0.0 %
image/webp2 0.0 %

not recorded for 6 entries

Path argument present

13,770
Path argument present
no13,351 97 %
yes419 3.0 %

Per property, the measured values inside this category. The share refers to the 13,770 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. 13,770 entries at 200 each are 69 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 14,812 entries in this category13,764 shared Locally executed MCP servers 17,143 entries in this category13,770 shared Local MCP servers with a repository URL 16,232 entries in this category13,163 shared Local MCP servers without declared required secrets 13,303 entries in this category10,889 shared MCP servers over stdio, as an npm package only 8,731 entries in this category8,731 shared Local MCP servers as an npm package only 10,137 entries in this category8,731 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