Owner

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

Web client sends clientInfo.version as 0.0.0 instead of the Inspector package version Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 35/100

modelcontextprotocol/inspector#2445 · Opened Sep 20, 2026
How can I manage resource across multiple tool calls during one session? Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

modelcontextprotocol/python-sdk#3549 · Opened Sep 20, 2026
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
Error: Browser navigation is locked during ChatGPT login Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

modelcontextprotocol/typescript-sdk#2834 · 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
server-memory: saveGraph rewrites memory.jsonl via temp-file + rename, dropping an existing file's permission bits (0600 -> 0644) and silently overwriting read-only files Open

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

modelcontextprotocol/servers#4827 · 1 comment · Opened Sep 19, 2026
OpenTrustBench security assessment for servers Open

Difficulty 1/5 Under an hour Newbie friendliness 35/100

modelcontextprotocol/servers#4826 · 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
Document the GitHub security advisory flow as a skill, and reconcile the two rules it contradicts Open

documentation v2

Difficulty 4/5 3-5 days Newbie friendliness 58/100

modelcontextprotocol/inspector#2443 · 1 comment · 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
PKCE verification: 2025-11-25 requires refusing when `code_challenge_methods_supported` is absent, which conflicts with the #832 / #992 resolution Open

Difficulty 5/5 Over a week Newbie friendliness 28/100

modelcontextprotocol/typescript-sdk#2831 · Opened Sep 18, 2026
Request: delete io.github.UlyssesModel/kirk-mcp (all versions) - org renamed to Kavara-AI, blocking republish Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

modelcontextprotocol/registry#1651 · Opened Sep 18, 2026
Everything-server rejects valid _meta on stateful initialize Open

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

modelcontextprotocol/conformance#506 · Opened Sep 18, 2026
[Discussion] Proactively detect and surface server-side rate limiting Open

enhancement v2

Difficulty 4/5 3-5 days Newbie friendliness 48/100

modelcontextprotocol/inspector#2442 · Opened Sep 18, 2026
[Discussion] Generate a mock MCP server from a recorded Inspector session Open

enhancement v2

Difficulty 5/5 Over a week Newbie friendliness 35/100

modelcontextprotocol/inspector#2441 · Opened Sep 18, 2026
[Discussion] Semantic/fuzzy tool search instead of exact-substring filtering Open

enhancement v2

Difficulty 5/5 Over a week Newbie friendliness 30/100

modelcontextprotocol/inspector#2440 · Opened Sep 18, 2026
[Discussion] Built-in load/concurrency test mode for stress-testing MCP servers Open

enhancement v2

Difficulty 5/5 Over a week Newbie friendliness 30/100

modelcontextprotocol/inspector#2439 · 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
No dedicated test fixture simulates a mid-session server crash/disconnect Open

enhancement v2

Difficulty 4/5 3-5 days Newbie friendliness 68/100

modelcontextprotocol/inspector#2437 · Opened Sep 18, 2026
TUI has no in-app shortcut/keybinding help screen Open

enhancement v2

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

modelcontextprotocol/inspector#2436 · Opened Sep 18, 2026
CLI has no --quiet/--silent flag to suppress non-essential output Open

enhancement v2

Difficulty 3/5 1-2 days Newbie friendliness 65/100

modelcontextprotocol/inspector#2435 · Opened Sep 18, 2026
CLI has no shell completion (bash/zsh/fish) Open

enhancement v2

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

modelcontextprotocol/inspector#2434 · Opened Sep 18, 2026
CLI has no write path for the server catalog (add/remove/edit servers) Open

enhancement v2

Difficulty 4/5 3-5 days Newbie friendliness 55/100

modelcontextprotocol/inspector#2433 · Opened Sep 18, 2026
TUI has no UI for Tasks, resource subscriptions, or Roots Open

enhancement v2

Difficulty 5/5 Over a week Newbie friendliness 48/100

modelcontextprotocol/inspector#2432 · Opened Sep 18, 2026
CLI has no way to export/save a tool call result to a file Open

enhancement v2

Difficulty 4/5 3-5 days Newbie friendliness 55/100

modelcontextprotocol/inspector#2431 · Opened Sep 18, 2026
TUI has no search/filter for tools, resources, prompts, or skills lists Open

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

modelcontextprotocol/inspector#2430 · 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
tests/client/test_client.py: 14 failures on Windows — AttributeError: '...Result' object has no attribute '_meta' Open

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

modelcontextprotocol/python-sdk#3544 · 1 comment · Opened Sep 18, 2026
Go SDK — SEP-2640 Skills support Open

enhancement SEP-2640

modelcontextprotocol/ext-skills#149 · 1 assignee · Opened Sep 18, 2026
[Proposal] SEP-2351: Explicit RFC 8414 well-known URI suffix specification & client discovery (#810) Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

modelcontextprotocol/kotlin-sdk#1009 · Opened Sep 18, 2026
[Proposal] Provide ServerSession in onConnect & global notification handler callbacks (#780) Open

Difficulty 5/5 Over a week Newbie friendliness 45/100

modelcontextprotocol/kotlin-sdk#1008 · Opened Sep 18, 2026
[Proposal] SEP-1865: MCP Apps (Interactive User Interfaces) architecture & SDK integration design (#802) Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

modelcontextprotocol/kotlin-sdk#1007 · 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
OAuth client sends discovery/registration requests with no User-Agent, so WAF-fronted servers (Cloudflare) 403 the whole flow Open

v1 v2

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

modelcontextprotocol/python-sdk#3531 · 1 comment · Opened Sep 18, 2026
[Proposal] SEP-2133: Extensions framework architecture & integration design (#804) Open

Difficulty 5/5 Over a week Newbie friendliness 30/100

modelcontextprotocol/kotlin-sdk#1006 · Opened Sep 18, 2026
[Proposal] SEP-2322: Multi Round-Trip Requests (MRTR) architecture & flow design (#808) Open

Difficulty 5/5 Over a week Newbie friendliness 28/100

modelcontextprotocol/kotlin-sdk#1005 · Opened Sep 18, 2026
[Proposal] SEP-2567: Sessionless MCP via Explicit State Handles architecture & migration design (#814) Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

modelcontextprotocol/kotlin-sdk#1004 · Opened Sep 18, 2026
[Proposal] SEP-2663: Tasks Extension architecture & migration design (#817) Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

modelcontextprotocol/kotlin-sdk#1003 · Opened Sep 18, 2026
[Proposal] SEP-2260: Require Server requests to be associated with Client requests (#807) Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

modelcontextprotocol/kotlin-sdk#1002 · Opened Sep 18, 2026
[Proposal] SEP-2549: TTL for List Results implementation design (#813) Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

modelcontextprotocol/kotlin-sdk#1001 · Opened Sep 18, 2026
[Proposal] SEP-414: OpenTelemetry Trace Context Propagation design (#800) Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

modelcontextprotocol/kotlin-sdk#1000 · Opened Sep 18, 2026
Client accepts JSON-RPC response containing both result and error Open

bug P1 ready for work T-model T-service

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

modelcontextprotocol/rust-sdk#1283 · 1 comment · Opened Sep 18, 2026
Origin validation rejects browser-based MCP clients on authenticated remote servers Open

bug

Difficulty 5/5 Over a week Newbie friendliness 30/100

modelcontextprotocol/modelcontextprotocol#3370 · 1 comment · Opened Sep 18, 2026
Deep-link auth-token comparison in deepLink.ts isn't constant-time Open

bug v2

Difficulty 3/5 1-2 days Newbie friendliness 58/100

modelcontextprotocol/inspector#2429 · 1 comment · Opened Sep 18, 2026
Skills-verification budget-exceeded message names a `--method skills/get --uri` escape hatch with no test asserting it round-trips Open

chore v2

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

modelcontextprotocol/inspector#2428 · 1 comment · Opened Sep 18, 2026
docs/mcp-app-review.md is a manual review checklist with no automated CI enforcement Open

chore v2

Difficulty 3/5 1-2 days Newbie friendliness 58/100

modelcontextprotocol/inspector#2426 · 1 comment · Opened Sep 18, 2026
dependabot-alerts.mjs's openAlerts() has no error handling for a rate-limited or partially-failed GitHub API response Open

bug v2

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

modelcontextprotocol/inspector#2425 · 1 comment · 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

Showing the newest 100

This page lists what was indexed most recently. Advanced filter has the whole inventory, narrowed by language, difficulty and how long a task takes.

Open advanced filter

modelcontextprotocol

Showing the newest 100

Get new issues in your inbox