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modelcontextprotocol

27 indexed repositories · View on GitHub

servers
Model Context Protocol Servers

TypeScript · 90478 stars
python-sdk
The official Python SDK for Model Context Protocol servers and clients

Python · 24348 stars
typescript-sdk
The official TypeScript SDK for Model Context Protocol servers and clients

TypeScript · 13432 stars
inspector
Visual testing tool for MCP servers

TypeScript · 10913 stars
modelcontextprotocol
Specification and documentation for the Model Context Protocol

TypeScript · 9256 stars
registry
A community driven registry service for Model Context Protocol (MCP) servers.

Go · 7267 stars
go-sdk
The official Go SDK for Model Context Protocol servers and clients. Maintained in collaboration with Google.

Go · 5123 stars
csharp-sdk
The official C# SDK for Model Context Protocol servers and clients. Maintained in collaboration with Microsoft.

C# · 4536 stars
rust-sdk
The official Rust SDK for the Model Context Protocol

Rust · 3944 stars
java-sdk
The official Java SDK for Model Context Protocol servers and clients. Maintained in collaboration with Spring AI

Java · 3702 stars
ext-apps
Official repo for spec & SDK of MCP Apps protocol - standard for UIs embedded AI chatbots, served by MCP servers

TypeScript · 2859 stars
php-sdk
The official PHP SDK for Model Context Protocol servers and clients. Maintained in collaboration with The PHP Foundation.

PHP · 1613 stars
kotlin-sdk
The official Kotlin SDK for Model Context Protocol servers and clients. Maintained in collaboration with JetBrains

Kotlin · 1461 stars
quickstart-resources
A repository of servers and clients from the Model Context Protocol tutorials

TypeScript · 1189 stars
ruby-sdk
The official Ruby SDK for the Model Context Protocol servers and clients.

Ruby · 914 stars
ext-skills
MCP Extension for Skills discovery and distribution through MCP primitives. Maintained by the Skills Over MCP Working Group.

MDX · 655 stars
conformance
Conformance Tests for MCP

TypeScript · 127 stars
example-remote-server
A hosted version of the Everything server - for demonstration and testing purposes, hosted at https://example-server.modelcontextprotocol...

TypeScript · 80 stars
financial-services-interest-group
Financial Services Interest Group

61 stars
ext-tasks
This repository provides a reference for the tasks extensions to the MCP protocol, allowing for long-running operations, such as Agent co...

TypeScript · 46 stars
7 more repositories live on View on GitHub

Beginner friendly Everything

Open All

Docs: `fetch` installs npm packages during a tool call, which is worth stating for deployments Open

Difficulty 2/5 1-3 hours Newbie friendliness 72/100

modelcontextprotocol/servers#4830 · Opened Sep 19, 2026
mcp: keepalive logs an ordinary client disconnect at Error, drowning real failures Open

Difficulty 2/5 1-3 hours Newbie friendliness 78/100

modelcontextprotocol/go-sdk#1281 · Opened Sep 19, 2026
Docs: tool descriptions for browser-embedding servers do not mention the browser's own background traffic Open

Difficulty 2/5 1-3 hours Newbie friendliness 68/100

modelcontextprotocol/servers#4829 · Opened Sep 19, 2026
doc typo, "Serves" should be "Servers" in draft resources spec Open

bug

Difficulty 1/5 Under an hour Newbie friendliness 98/100

modelcontextprotocol/modelcontextprotocol#3373 · 1 comment · Opened Sep 19, 2026
Streamable HTTP client logs a WARNING for valid 202 Accepted on session termination (DELETE) Open

v1 v2

Difficulty 2/5 1-3 hours Newbie friendliness 85/100

modelcontextprotocol/python-sdk#3546 · 4 comments · Opened Sep 19, 2026
Remove server entry: io.github.navshainc/noshup-public (all versions) Open

Difficulty 1/5 Under an hour Newbie friendliness 68/100

modelcontextprotocol/registry#1652 · Opened Sep 18, 2026
Web client's backend server has no health/readiness endpoint Open

enhancement v2

Difficulty 2/5 1-3 hours Newbie friendliness 76/100

modelcontextprotocol/inspector#2438 · Opened Sep 18, 2026
Server ClientAuthenticator requires client_id in token body, rejecting valid client_secret_basic requests (RFC 6749 §2.3.1) Open

v1 v2

Difficulty 2/5 1-3 hours Newbie friendliness 76/100

modelcontextprotocol/python-sdk#3545 · 1 comment · Opened Sep 18, 2026
SSE client silently truncates a data: line at U+2028/U+2029/U+0085, then fails with "Error parsing JSON-RPC message" Open

area/transport bug P2

Difficulty 2/5 1-3 hours Newbie friendliness 88/100

modelcontextprotocol/java-sdk#1136 · Opened Sep 18, 2026
Docker HEALTHCHECK hardcodes 127.0.0.1 while HOST defaults to 0.0.0.0 Open

bug v2

Difficulty 2/5 1-3 hours Newbie friendliness 78/100

modelcontextprotocol/inspector#2424 · 2 comments · Opened Sep 18, 2026
No visible test for Windows path separators in launcher/CLI argument forwarding Open

chore v2

Difficulty 2/5 1-3 hours Newbie friendliness 78/100

modelcontextprotocol/inspector#2416 · 1 comment · Opened Sep 18, 2026
TUI has five exhaustive-deps-suppressed effects with no justification comment Open

chore v2

Difficulty 2/5 1-3 hours Newbie friendliness 76/100

modelcontextprotocol/inspector#2414 · 1 comment · Opened Sep 18, 2026
CLI's long-lived stream path can crash with an uncaught EPIPE Open

bug v2

Difficulty 2/5 1-3 hours Newbie friendliness 76/100

modelcontextprotocol/inspector#2412 · 1 comment · Opened Sep 18, 2026
CLI's open() call has no timeout, no catch, and no fallback message Open

bug v2

Difficulty 2/5 1-3 hours Newbie friendliness 74/100

modelcontextprotocol/inspector#2410 · 1 comment · Opened Sep 18, 2026
Modern skills/get results must carry ttlMs and cacheScope (ext-skills stable spec) Open

bug v2

Difficulty 2/5 1-3 hours Newbie friendliness 85/100

modelcontextprotocol/inspector#2404 · 1 comment · Opened Sep 17, 2026
Revocation requires client_secret to be present Open

v1 v2

Difficulty 1/5 Under an hour Newbie friendliness 91/100

modelcontextprotocol/python-sdk#3508 · 2 comments · Opened Sep 15, 2026
Add ContHunt remote MCP server Open

Difficulty 2/5 1-3 hours Newbie friendliness 70/100

modelcontextprotocol/servers#4812 · Opened Sep 15, 2026
Does same-origin redirect enforcement break MCP servers behind a reverse proxy? Open

Difficulty 2/5 1-3 hours Newbie friendliness 64/100

modelcontextprotocol/python-sdk#3504 · Opened Sep 15, 2026
Security considerations section can be improved Open

bug

Difficulty 2/5 1-3 hours Newbie friendliness 68/100

modelcontextprotocol/modelcontextprotocol#3361 · Opened Sep 14, 2026
streamable-http server: a supplied Mcp-Method contradicting an initialize body is silently accepted Open

bug P1 ready for work T-transport

Difficulty 2/5 1-3 hours Newbie friendliness 76/100

modelcontextprotocol/rust-sdk#1271 · Opened Sep 14, 2026
git_checkout reports "Switched to branch 'X'" when the checkout actually detached HEAD Open

Difficulty 2/5 1-3 hours Newbie friendliness 86/100

modelcontextprotocol/servers#4804 · 1 comment · Opened Sep 14, 2026
docs: Fix double border in the footer Open

bug

Difficulty 2/5 1-3 hours Newbie friendliness 84/100

modelcontextprotocol/modelcontextprotocol#3357 · Opened Sep 12, 2026
README gate confirmation command can be used by any commenter, bypassing the "readme: pending" gate Open

Difficulty 2/5 1-3 hours Newbie friendliness 82/100

modelcontextprotocol/servers#4796 · Opened Sep 12, 2026
everything server: instructions unconditionally reference sampling/elicitation tools that only exist when the client declares those capabilities Open

Difficulty 2/5 1-3 hours Newbie friendliness 75/100

modelcontextprotocol/servers#4792 · Opened Sep 11, 2026
Document ClientOAuthOptions.ScopeSelector usage Open

Difficulty 2/5 1-3 hours Newbie friendliness 78/100

modelcontextprotocol/csharp-sdk#1867 · Opened Sep 11, 2026
Streamable HTTP stateless servers hang clients on the listen-mode GET (_handle_get_request opens a hold-open SSE stream) Open

v1 v2

Difficulty 2/5 1-3 hours Newbie friendliness 82/100

modelcontextprotocol/python-sdk#3492 · 1 comment · Opened Sep 11, 2026
Auth metadata discovery: fallback URL built on resource host instead of authorization-server host Open

Difficulty 2/5 1-3 hours Newbie friendliness 74/100

modelcontextprotocol/typescript-sdk#2784 · Opened Sep 10, 2026
Auth metadata discovery: fallback only triggers on 404, misses 401/403 Open

Difficulty 2/5 1-3 hours Newbie friendliness 82/100

modelcontextprotocol/typescript-sdk#2783 · 1 comment · Opened Sep 10, 2026
pkg_version() in Server.create_initialization_options doesn't guard against importlib.metadata.version() returning None Open

v1

Difficulty 2/5 1-3 hours Newbie friendliness 78/100

modelcontextprotocol/python-sdk#3487 · 3 comments · Opened Sep 9, 2026
authorizationHandler drops the OAuth state parameter on error redirects Open

Difficulty 2/5 1-3 hours Newbie friendliness 88/100

modelcontextprotocol/typescript-sdk#2773 · Opened Sep 9, 2026
Simplify `src/mcp/shared/metadata_utils.py::get_display_name` logic. Open

Difficulty 1/5 Under an hour Newbie friendliness 88/100

modelcontextprotocol/python-sdk#3480 · 1 comment · Opened Sep 8, 2026
[Bug] Client sends empty _meta:{} on every request; strict servers (Meta Ads MCP) reject with HTTP 400 Open

v2

Difficulty 2/5 1-3 hours Newbie friendliness 78/100

modelcontextprotocol/python-sdk#3473 · 2 comments · Opened Sep 8, 2026
server-filesystem: missing inputSchema.type breaks JSON Schema 2020-12 validators (all versions 0.6.2–2025.8.21) Open

Difficulty 2/5 1-3 hours Newbie friendliness 70/100

modelcontextprotocol/servers#4772 · 2 comments · Opened Sep 7, 2026
Doc comments misattribute the token-endpoint TLS check to SEP-2207 (which is OIDC refresh / `offline_access`) Open

Difficulty 1/5 Under an hour Newbie friendliness 92/100

modelcontextprotocol/typescript-sdk#2766 · 1 comment · Opened Sep 7, 2026
StreamableHTTP: a client disconnect while reading the POST body is logged as an exception and answered 500 Open

v1 v2

Difficulty 2/5 1-3 hours Newbie friendliness 78/100

modelcontextprotocol/python-sdk#3469 · 2 comments · Opened Sep 7, 2026
check_resource_allowed treats /api/../admin as under /api Open

v1 v2

Difficulty 2/5 1-3 hours Newbie friendliness 82/100

modelcontextprotocol/python-sdk#3464 · 3 comments · Opened Sep 6, 2026
DNS rebinding :* allowlist matches Host/Origin suffixes that are not ports Open

v1 v2

Difficulty 2/5 1-3 hours Newbie friendliness 84/100

modelcontextprotocol/python-sdk#3463 · 2 comments · Opened Sep 6, 2026
git_add reports 'Files staged successfully' when nothing was staged Open

Difficulty 2/5 1-3 hours Newbie friendliness 74/100

modelcontextprotocol/servers#4763 · 1 comment · Opened Sep 6, 2026
Authorization flow documentation still talks about DCR (deprecated) and does not mention CIMD Open

bug

Difficulty 2/5 1-3 hours Newbie friendliness 78/100

modelcontextprotocol/modelcontextprotocol#3345 · 2 comments · Opened Sep 3, 2026
[v2] modern streamable HTTP watch_disconnect can busy-loop and peg a CPU core Open

v2

Difficulty 2/5 1-3 hours Newbie friendliness 86/100

modelcontextprotocol/python-sdk#3439 · 3 comments · Opened Sep 3, 2026
Client request handlers that complete empty send no JSON-RPC response Open

area/client bug P2

Difficulty 2/5 1-3 hours Newbie friendliness 84/100

modelcontextprotocol/java-sdk#1124 · 1 comment · Opened Sep 3, 2026
Reference host renders tool.name in the app header; base spec display precedence is title → annotations.title → name Open

bug

Difficulty 2/5 1-3 hours Newbie friendliness 84/100

modelcontextprotocol/ext-apps#767 · Opened Sep 3, 2026
Server auth defaults silently produce RFC 9728-noncompliant discovery when the MCP endpoint has a path Open

Difficulty 2/5 1-2 days Newbie friendliness 72/100

modelcontextprotocol/typescript-sdk#2751 · Opened Sep 3, 2026
Empty cacheScope on tools/list drops every tool Open

bug P2 ready for work T-model

Difficulty 2/5 1-3 hours Newbie friendliness 78/100

modelcontextprotocol/rust-sdk#1242 · Opened Sep 2, 2026
coerce_request_id() folds non-canonical numeric strings, conflating wire-distinct JSON-RPC ids Open

v1 v2

Difficulty 2/5 1-3 hours Newbie friendliness 84/100

modelcontextprotocol/python-sdk#3432 · 4 comments · Opened Sep 2, 2026
Dockerfiles for fetch/git/time create an `app` user (since #2205) but never switch to it; all seven images run as root Open

Difficulty 2/5 1-3 hours Newbie friendliness 78/100

modelcontextprotocol/servers#4741 · Opened Sep 2, 2026
experimental.tasks.getTaskResult() throws TypeError: Cannot read properties of undefined (reading '_zod') when the optional result schema is omitted Open

Difficulty 2/5 1-3 hours Newbie friendliness 84/100

modelcontextprotocol/typescript-sdk#2742 · 2 comments · Opened Aug 31, 2026
sequential-thinking: readOnlyHint and idempotentHint annotations are inaccurate (server is stateful, non-idempotent) Open

Difficulty 1/5 Under an hour Newbie friendliness 88/100

modelcontextprotocol/servers#4721 · 1 comment · Opened Aug 30, 2026
everything: subscriptions map never drops a disconnected session Open

server-everything

Difficulty 2/5 1-3 hours Newbie friendliness 86/100

modelcontextprotocol/servers#4710 · 1 comment · Opened Aug 28, 2026
Post-v1: batch resource read proposal Open

Difficulty 2/5 1-3 hours Newbie friendliness 78/100

modelcontextprotocol/ext-skills#128 · Opened Aug 28, 2026

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