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Claude Code project ideas

Anthropic's agent for the terminal, running Claude models like Opus 5 and Fable 5.1.

What you'd build

SaaS products
7
CLI tools
5
MCP servers
3
Skills
3
Hooks
3
Subagents
3
Plugins
3
Apps
2
Extensions
1
30
Claude Code ideas
19k
upvotes on the source threads
57
Reddit threads
11
weekend-sized builds

Build time vs. demand

Bar length = upvotes on the Reddit threads behind each idea

30 Claude Code ideas

Most upvoted first. Open a card for build steps and threads

2.7k
4 Reddit threads
App

Usage limit radar

A menu bar app that shows what's left of your Claude Code, Codex and Cursor limits before a task dies mid-run.

Claude Code logo>_Cursor logo1 to 2 weeks$5/mo
How to build it
  1. 1Read the session logs each agent writes locally and count tokens per usage window.
  2. 2Show the remaining budget per tool in the menu bar, with a warning at 80%.
  3. 3Charge for history and team views once the single-user app is solid.
Tauri or SwiftLocal session logsOS notificationsBuyer: Max, Pro and Ultra subscribers

The Reddit threads

2.6k
2 Reddit threads
CLI tool

Command output compressor

A proxy that trims noisy test and build output before it floods the agent's context.

Claude Code logo>_Cursor logo1 to 2 weeksFree core, $8/mo rule packs
How to build it
  1. 1Wrap test runners, builds and git log so only failures and summaries pass through.
  2. 2Count tokens saved per session so the value is obvious.
  3. 3Sell filter packs per framework and language.
Rust or GoShell wrapperPer-command filtersBuyer: Heavy agent users on usage caps

The Reddit threads

2.3k
1 Reddit thread
MCP server

Agent-to-agent chat bridge

A shared channel where Claude Code and Codex pass work to each other instead of you copy-pasting.

Claude Code logo>_Cursor logo1 to 2 weeksFree, paid hosted rooms
How to build it
  1. 1Expose post_message and read_messages tools over MCP.
  2. 2Give each agent a role so handoffs stay in order.
  3. 3Add a web view so you can watch the thread and step in.
MCP serverWebSocketSQLiteBuyer: Developers pairing two agents

The Reddit threads

1.8k
4 Reddit threads
SaaS

Pre-launch security scan

Checks a vibe-coded app for open databases, leaked keys and missing auth rules before launch.

Claude Code logo>_Cursor logoA month$29 per scan
How to build it
  1. 1Crawl the live app and test Firebase and Supabase rules for public reads and writes.
  2. 2Scan the client bundle for API keys that should never ship.
  3. 3Return fixes written as prompts the founder can paste into their agent.
Next.jsFirebase and Supabase rule checksHeadless browserBuyer: Non-technical founders before launch

The Reddit threads

1.6k
3 Reddit threads
SaaS

Skills and plugins directory

A searchable index of Claude Code skills and plugins with install commands, activity and safety notes.

Claude Code logo>_1 to 2 weeksFree, paid featured listings
How to build it
  1. 1Crawl GitHub for SKILL.md and marketplace.json files.
  2. 2Show install commands, stars, last update and which tools each one can run.
  3. 3Charge authors for featured spots and teams for private catalogs.
Next.jsGitHub APIScheduled crawlerBuyer: Skill authors and teams

The Reddit threads

1.5k
3 Reddit threads
Skill

Launch checklist skill

Walks the agent through auth, rate limits, backups and secrets before anything goes live.

Claude Code logo>_Weekend$19 one-time
How to build it
  1. 1Turn a production checklist into a SKILL.md with one section per risk.
  2. 2Bundle scripts that catch public database rules and committed secrets.
  3. 3Sell it as a one-time download with free updates.
SKILL.mdCheck scriptsMarkdown reportBuyer: Vibe coders about to launch

The Reddit threads

1.3k
2 Reddit threads
SaaS

Per-developer AI spend

Splits Cursor, Claude and Codex team bills by developer and repo, with alerts on spikes.

Claude Code logo>_Cursor logo1 to 2 weeks$4/seat/mo
How to build it
  1. 1Pull usage from each vendor's admin API every day.
  2. 2Map accounts to people and repos, then chart spend per week.
  3. 3Alert in Slack when someone spends 3x their normal day.
Vendor admin APIsPostgresSlack alertsBuyer: Engineering managers

The Reddit threads

1.3k
2 Reddit threads
Hook

Token budget guard

A hook that stops a runaway loop before it burns through your plan or your API bill.

Claude Code logoWeekendFree, paid team policies
How to build it
  1. 1On every PreToolUse event, sum the session's token use from its log.
  2. 2Exit with code 2 and a clear message once the session passes its budget.
  3. 3Sell shared budgets and Slack alerts to teams.
PreToolUse hookNode or BashSession JSONL logsBuyer: Teams on API billing

The Reddit threads

1.1k
3 Reddit threads
SaaS

Month-3 prototype rescue

Fixed-price cleanup for stalled vibe-coded apps: tests, structure and a real deploy pipeline.

Claude Code logo>_Cursor logoWeekend$1,500 per rescue
How to build it
  1. 1Sell a fixed-scope audit: architecture map, test coverage and top 10 risks.
  2. 2Have subagents write tests before any refactor starts.
  3. 3Upsell a monthly maintenance plan.
Claude CodeTest runnerGitHub ActionsBuyer: Non-technical founders stuck at month 3

The Reddit threads

Show 21 more ideas
1.1k
4 Reddit threads
App

Phone approvals for agents

A push notification when an agent needs you, with approve and deny right from the lock screen.

Claude Code logo>_1 to 2 weeks$6/mo
How to build it
  1. 1Use a Claude Code Notification hook to push when a session waits for input.
  2. 2Send the answer back through a small relay the session polls.
  3. 3Add Codex through its notify setting.
Notification hookPush relayReact NativeBuyer: Developers who leave agents running

The Reddit threads

1k
2 Reddit threads
Subagent

Test-first subagent

Writes a failing test that reproduces the bug before the main agent is allowed to fix it.

Claude Code logoWeekendFree, paid framework packs
How to build it
  1. 1Define a subagent that may only touch test files.
  2. 2Have it reproduce the bug as a failing test and hand back the test name.
  3. 3Use a Stop hook to confirm the test passes before the task closes.
.claude/agentsTest runnerStop hookBuyer: Vibe coders whose fixes keep breaking things

The Reddit threads

968
3 Reddit threads
CLI tool

Agent instructions linter

Scores CLAUDE.md, AGENTS.md and Cursor rules for bloat, contradictions and dead file paths.

Claude Code logo>_Cursor logoWeekendFree CLI, $9/mo CI
How to build it
  1. 1Parse each instructions file and count tokens per section.
  2. 2Flag rules that contradict each other or point at files that no longer exist.
  3. 3Sell a GitHub Action that comments when a pull request bloats the file.
Node CLIMarkdown parserGitHub ActionBuyer: Teams sharing one repo across agents

The Reddit threads

959
3 Reddit threads
Plugin

Private plugin marketplace

Pushes your team's approved skills, hooks and MCP servers to every laptop from one place.

Claude Code logo1 to 2 weeks$6/seat/mo
How to build it
  1. 1Host a private marketplace repo with the team's approved plugins.
  2. 2Add a web UI to approve versions and see who has what installed.
  3. 3Require plugins through managed settings.
Git marketplace repomarketplace.jsonAdmin UIBuyer: Engineering leads standardizing agent setups

The Reddit threads

866
5 Reddit threads
MCP server

Shared agent memory

One memory store that Claude Code, Codex, Cursor and ChatGPT all read, so no session starts blank.

Claude Code logo>_Cursor logoChatGPT logo1 to 2 weeks$9/mo hosted
How to build it
850
2 Reddit threads
Subagent

Codebase scout

A read-only subagent that maps the repo and returns only the files that matter to the task.

Claude Code logoWeekendFree, builds an audience
How to build it
  1. 1Give the subagent read and search tools only.
  2. 2Cache a repo map so repeat searches are cheap.
  3. 3Return a short list of files and why each matters.
.claude/agentsripgrepRepo map cacheBuyer: Developers working in large repos

The Reddit threads

589
2 Reddit threads
Subagent

Adversarial reviewer

A subagent whose only job is to break the main agent's diff before you merge it.

Claude Code logoWeekendFree, paid rule packs
How to build it
  1. 1Define a read-only subagent prompted to find bugs, not to praise.
  2. 2Hand it the staged diff plus the original task.
  3. 3Block the commit until each finding is fixed or waived.
.claude/agentsgit diffTest runnerBuyer: Solo devs shipping agent-written code

The Reddit threads

495
3 Reddit threads
SaaS

Internal tools studio

Rebuild a local business's worst spreadsheet as a small app with your agent. Charge monthly.

Claude Code logo>_Cursor logoChatGPT logo1 to 2 weeks$500 setup + $100/mo
How to build it
382
2 Reddit threads
MCP server

MCP tool router

One MCP server in front of many, loading only the tools a task needs so context stays small.

Claude Code logo>_Cursor logoChatGPT logoA month$15/mo
How to build it
  1. 1Proxy several downstream MCP servers behind one endpoint.
  2. 2Expose a search_tools tool and load full tool schemas only on demand.
  3. 3Charge for hosted routing and shared team server lists.
MCP TypeScript SDKEmbeddings searchProxyBuyer: Power users with 10+ MCP servers

The Reddit threads

382
2 Reddit threads
Plugin

Setup diet

Measures what each installed skill, MCP server and plugin costs in context, and switches off dead weight.

Claude Code logo1 to 2 weeksFree, $5/mo profiles
How to build it
  1. 1List enabled MCP servers, skills and plugins from the settings files.
  2. 2Estimate each one's token cost and check which were used this week.
  3. 3Offer one-command profiles: minimal, frontend, backend.
Claude Code pluginSettings filesSession logsBuyer: Claude Code users with big setups

The Reddit threads

367
2 Reddit threads
Plugin

Second-opinion review

Sends every agent diff to a different model and shows exactly where the two reviews disagree.

Claude Code logo>_1 to 2 weeks$10/mo
How to build it
  1. 1Add a /second-opinion command that runs the diff through Codex in read-only mode.
  2. 2Merge both reviews into one list marked agree or disagree.
  3. 3Post the merged review as a pull request comment.
Claude Code pluginCodex CLIGitHub APIBuyer: Small teams without a second reviewer

The Reddit threads

322
1 Reddit thread
Hook

Secrets guard

Blocks the agent from reading .env files, keys and credentials unless you allow it.

Claude Code logoWeekendFree, $6/mo team policies
How to build it
  1. 1Match Read, Grep and Bash calls against secret file patterns.
  2. 2Block with exit code 2 and log every attempt.
  3. 3Sell central policies and audit exports to teams.
PreToolUse hookGlob rulesAudit logBuyer: Teams with production secrets on laptops

The Reddit threads

306
2 Reddit threads
Extension

Agent diff heatmap

A Cursor and VS Code extension that colors agent-written lines by how risky they are to merge.

Claude Code logoCursor logo1 to 2 weeks$8/mo
How to build it
  1. 1Tag lines changed during agent sessions using git history.
  2. 2Score each hunk by complexity, test coverage and security-sensitive paths.
  3. 3Show a gutter heatmap and a "review these first" list.
VS Code extension APIgit blameStatic analysisBuyer: Reviewers of AI-written pull requests

The Reddit threads

283
1 Reddit thread
Skill

Demo video skill

Scripts, records and narrates a product walkthrough straight from your running app.

Claude Code logo1 to 2 weeks$29 one-time
How to build it
  1. 1Have the skill write a click-by-click script from the app's routes.
  2. 2Record it with Playwright and generate the narration.
  3. 3Stitch it with ffmpeg and export sizes for X and Product Hunt.
SKILL.mdPlaywrightText-to-speech APIffmpegBuyer: Indie founders preparing a launch

The Reddit threads

258
3 Reddit threads
CLI tool

Parallel agent dashboard

A terminal UI that runs agents in separate worktrees and shows which one is waiting on you.

Claude Code logo>_A month$12/mo
How to build it
  1. 1Create one worktree and branch per task with a single command.
  2. 2Show each agent's state: working, waiting for approval, or done.
  3. 3Merge or throw away a worktree from the dashboard when the task ends.
Go or Rust TUIgit worktreetmuxBuyer: Developers running 3+ agents at once

The Reddit threads

152
1 Reddit thread
Hook

Ask-before-editing hook

Makes the agent list its assumptions and ask questions before its first edit on a vague task.

Claude Code logoWeekendFree, builds an audience
How to build it
  1. 1On UserPromptSubmit, flag short prompts that name no files.
  2. 2On the first Edit or Write call, block once and ask Claude for its assumptions.
  3. 3Ship it in a plugin marketplace to grow a following.
UserPromptSubmit hookPreToolUse hookBuyer: Developers tired of wrong-direction edits

The Reddit threads

135
3 Reddit threads
Skill

Session handoff skill

Writes a tight handoff note when a session ends and loads it when the next one starts.

Claude Code logo>_WeekendFree, builds an audience
How to build it
  1. 1Write a SKILL.md that triggers on "wrap up" and "pick up where we left off".
  2. 2Save decisions, open tasks and file pointers to HANDOFF.md.
  3. 3Pair it with a SessionStart hook that loads the note automatically.
SKILL.mdMarkdown templateSessionStart hookBuyer: Anyone on a long-running project

The Reddit threads

128
3 Reddit threads
SaaS

Deploy for vibe coders

Reads the repo, picks hosting, sets secrets and explains the monthly cost in plain English.

Claude Code logo>_Cursor logoA month$15/mo per app
How to build it
  1. 1Detect the framework and database from the repo.
  2. 2Provision hosting and a database through provider APIs, then set secrets.
  3. 3Expose it as an MCP server so the agent can deploy for the user.
Provider APIsMCP serverNext.js dashboardBuyer: Non-technical builders

The Reddit threads

83
2 Reddit threads
CLI tool

MCP config sync

Keeps MCP servers in sync across Claude Code, Codex and Cursor, on every machine you use.

Claude Code logo>_Cursor logo1 to 2 weeks$4/mo sync
How to build it
  1. 1Read ~/.claude.json, ~/.codex/config.toml and ~/.cursor/mcp.json into one list.
  2. 2Edit once and write each tool's own format back.
  3. 3Sell encrypted sync of that list across machines.
Node CLIConfig adaptersEncrypted syncBuyer: Developers using 2+ agents

The Reddit threads

33
3 Reddit threads
CLI tool

Agent switcher kit

Converts Cursor rules to AGENTS.md and CLAUDE.md and moves your MCP setup when you switch tools.

Claude Code logo>_Cursor logoWeekendFree, builds an audience
How to build it
  1. 1Read .cursor/rules and turn each rule into an AGENTS.md section.
  2. 2Copy MCP servers into the Codex and Claude Code config formats.
  3. 3Print what could not be converted.
Node CLIMarkdown transformsBuyer: Developers switching agents

The Reddit threads

22
4 Reddit threads
SaaS

MCP server trust score

Tests public MCP servers for uptime, source code and hidden instructions, then grades each one.

Claude Code logo>_Cursor logoChatGPT logoA monthFree directory, $49/mo API
How to build it

The threads behind them

Most upvoted Reddit posts

BID MCP server

Ask your agent what to build next

Connect Business Ideas Database to Claude Code, Codex or Cursor and search validated ideas, Reddit proof and keyword data without leaving the terminal.

# Claude Code
claude mcp add --transport http bid \
https://businessideasdb.com/api/mcp \
--header "Authorization: Bearer $BID_KEY"
✓ Connected: search_ideas, get_idea
# then just ask
find me a dev tool idea with real demand

Questions

What is Claude Code?

Claude Code is Anthropic's agentic coding tool. It runs in your terminal, IDE, desktop app and browser, reads your codebase, edits files and runs commands. You extend it with skills, hooks, subagents, plugins and MCP servers.

What is the easiest Claude Code idea to start with?

Launch checklist skill: Walks the agent through auth, rate limits, backups and secrets before anything goes live. It is sized at weekend, and the threads behind it have 1.5k upvotes.

More vibe coding ideas

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