23 Side Businesses to Start With Claude Code This Summer
Not likeable ideas, actual missions you can ship before the vacation ends
Nobody monetizes "Claude Code." It doesn't have a bank account. What you monetize is a side business that happens to have a senior dev on call 24/7 who never asks for time off, and that changes the cost-to-speed math on missions that took a freelancer a full week 3 years ago.
This list isn't a career plan. It's a menu. 23 formats you can test this summer, from a 1-day landing page to a subscription market-intelligence dashboard, each with a real opportunity window, honest difficulty, and a starter prompt so you're not staring at a blank page. Some of these have a real edge tied to running an agent that writes code (the no-code competitor literally can't keep up). Others don't, really, it's just fast execution on a real need, and I'm not going to pretend otherwise.
Difficulty key: Easy = shippable in 1 to 3 days with Claude Code or Codex alone. Medium = 1 to 2 weeks, needs some outreach or a third-party integration. Hard = several weeks, needs a real sales loop or domain expertise.
1. Migrate a no-code MVP into real code
Someone built an MVP on Bolt, Lovable, or v0, it half-works, and now they want clean, deployable code. You take their export and refactor it with Claude Code. The generated code often looks like a level-1 RPG character randomly stuffed with stat points, spread everywhere, no synergy, and it dies at the first real boss (an actual traffic spike).
Pitch: You're the customer support no-code tool never planned for.
Opportunity window: strong in summer, the MVPs from spring start breaking under real load.
Difficulty: Medium
Starter prompt:
Here's the export of a project generated with [Bolt/Lovable/v0]: [paste structure/repo].
Audit the code quality, list security issues, technical debt, and scalability problems.
Propose a refactor plan prioritized by risk, with a time estimate per item.
2. Migrate a no-code website into custom code
A different variant of item 1. Here it's a website (Wix, Squarespace) hitting the limits of its builder, not an app. The owner wants speed and visual freedom, not a business logic refactor. Static rebuild, no backend to save.
Pitch: The builder did its job. Now it's blocking the door.
Opportunity window: good summer complement, short sales cycle on a concrete need.
Difficulty: Medium
Starter prompt:
Here's the content and structure of a [Wix/Squarespace] site: [pages, sections, content].
Rebuild it as equivalent static HTML/CSS/JS, optimized for load speed,
keeping the same content hierarchy and visual style.
3. Verticalized SaaS starter kit sold direct
Not another generic Next.js plus Clerk plus Convex boilerplate, that market's been saturated for a while. A starter built for one specific vertical: invoicing for construction freelancers, booking for sports coaches, inventory for Etsy sellers. The code is nearly identical across all of them, the niche does all the conversion work.
Pitch: Same boilerplate everyone ships, talking to one specific person.
Opportunity window: constant, summer spike from new side-projects.
Difficulty: Medium
Starter prompt:
Build a Next.js SaaS boilerplate for [specific vertical], with Clerk auth,
a Convex database, a pricing page matching this niche's vocabulary, basic Stripe
subscription handling, and a user dashboard pre-filled with realistic sample data for this trade.
4. Same-day website for local businesses
Restaurants, guesthouses, craftspeople with no site or a broken one, during tourist season, where every day without a site means lost customers. I've seen a pizza place lose an entire weekend of orders because their site crashed Friday afternoon and nobody knew how to fix it until Monday.
Pitch: The client doesn't want a website. They want to stop being embarrassed by theirs.
Opportunity window: very concrete, July-August, before back-to-school.
Difficulty: Easy
Starter prompt:
Build a one-page website for [business type] with hero, presentation, photo gallery,
hours, Google Maps directions, contact form, mobile responsive,
deployable on Vercel in one click.
5. Rebuild an ugly internal dashboard
The Airtable hack or the giant Google Sheet nobody understands anymore, that the whole company still relies on because rebuilding it kept getting pushed to later.
Pitch: Ctrl+F isn't a search engine. It's a confession.
Opportunity window: constant.
Difficulty: Medium
Starter prompt:
Here's the current data structure [source]. Build a [Next.js/Streamlit] dashboard
that surfaces the same metrics with filters, charts, and CSV export.
6. Automate internal reports for small businesses
Local businesses still building their reports by hand in Excel or Sheets. You ship a script that automates the extraction and formatting.
Pitch: Nobody pays for a script. Everyone pays to never rebuild that report on a Friday again.
Opportunity window: not very seasonal, good complement to short summer gigs.
Difficulty: Easy
Starter prompt:
Write a Google Apps Script that reads data from [source], aggregates it by [criterion],
and generates a weekly report auto-emailed in [format].
7. "Prompt plus code" pack for one specific job
Not generic prompts, a combo of a prompt plus a code skeleton for a precise job need: contract generator, quote generator, job description generator. A bit like a well-designed loot table, every roll drops something usable, not a generic gray item.
Pitch: A prompt alone is advice. A prompt with the code behind it is a tool.
Opportunity window: good match with the summer wave of first-time vibe coders.
Difficulty: Easy
Starter prompt:
Build a reusable template (prompt plus code skeleton) that generates [document/business artifact]
from [user inputs]. Document the variables to swap and a full usage example.
8. Automated test setup for indie hackers
Side-projects shipped fast have zero tests. You sell an audit plus a Playwright or Vitest setup delivered as a turnkey package, before "works on my machine" becomes the official subtitle of their incident postmortem.
Pitch: They shipped fast. You sell the good night's sleep that comes with it.
Opportunity window: spikes after spring-summer launches start hitting bugs in prod.
Difficulty: Medium
Starter prompt:
Analyze this repo [repo] and propose a Playwright test suite covering the 5 critical
user flows. Generate the test files, the matching GitHub Actions CI config, and an initial
coverage report.
9. Niche micro-API sold by usage
An API that does one thing well (structured PDF extraction, address normalization), monetized via RapidAPI or direct. Like an NPC with a single line of dialogue, but it delivers it perfectly every run.
Pitch: It only does one thing. That's why nobody haggles on price.
Opportunity window: constant.
Difficulty: Medium
Starter prompt:
Build a FastAPI service that takes [raw data type] as input and returns [structured format].
Add rate limiting, an API key, and auto-generated OpenAPI docs.
10. Custom Discord bot for communities
Discord communities (gaming, crypto, indie hacker) pay for custom moderation, onboarding, or engagement bots.
Pitch: The 3am moderation raid is now the bot's problem. Not yours.
Opportunity window: summer spike, more community activity during vacation.
Difficulty: Easy to Medium
Starter prompt:
Build a Discord bot (discord.js or discord.py) that [precise function: onboarding, moderation, stats].
Generate the code, the slash command structure, and the deployment guide.
11. Express technical SEO overhaul
Technical audit and fixes (schema markup, core web vitals, tag structure) delivered as a fixed 48-hour package for small sites.
Pitch: SEO doesn't get fixed by talking about it. It gets fixed by committing to it.
Opportunity window: good summer complement, short sales cycle.
Difficulty: Medium
Starter prompt:
Audit this site [url] on technical SEO criteria: schema markup, speed, tag structure,
internal linking. List fixes ranked by impact and generate the corrected code for the top 3.
12. Subscription market-intelligence dashboard
The strongest pattern on this list. A crawler that tracks one precise signal in a sector (market moves, new entrants, pricing changes at competitors), delivered as a living view (map, sorted list, alerts) sold on subscription to B2B buyers who need to move before everyone else does.
The moat isn't the scraping, anyone can scrape. The moat is a base that keeps itself updated, like a radar that beeps before the boss appears on screen instead of after it already hit you. Two solid starting verticals: tracking where money is moving (new wealth pockets, new economic hubs), or tracking the economics of one specific business model (who's going paid, at what price, with what retention). Skip anything that resembles reselling data tied to identified individuals, GDPR doesn't like it and neither does a serious client. Stay on aggregates, market signal, never a contact list.
Pitch: Your client isn't paying for the data. They're paying to never have to go find it themselves again.
Opportunity window: constant, single-vertical MVP shippable under 2 weeks.
Difficulty: Medium
Starter prompt:
Write a pipeline that scrapes [targeted public sources], dedupes and normalizes [target fields],
then generates a [map/list/dashboard] view, sortable and filterable, on a scheduled refresh.
Add an email alert system for when a new signal appears in the tracked set.
13. Browser extension companion to a paid dashboard
A standalone extension, in a market flooded with free starters, sells badly and has no real edge tied to Claude Code. But as a power-up on top of an existing intelligence dashboard (see item 12), the math changes. The extension surfaces the signal right where the user already works (a competitor's product page, a LinkedIn profile, a listing), and routes back to the full subscription for history and alerts.
Pitch: The extension is the power-up. The paid dashboard is the actual game.
Opportunity window: constant, but only if a data product already exists behind it.
Difficulty: Easy to Medium
Starter prompt:
Build a Chrome extension (manifest v3) that detects [target page type] and overlays data from
[the existing dashboard's API, see item 12]. Generate the manifest.json, the content script,
the popup UI, and a clear call-to-action toward the full subscription.
14. Custom scoring engine for selective processes
A mono-function SaaS that receives applications and scores them against precise business rules, to balance a list (quotas, profiles, ratios). Works for exclusive dinners, but also accelerator cohorts, training cohorts, product waitlists. A Typeform plus an Airtable can't do custom scoring logic, an agent that writes code assembles this in a few days.
Pitch: Airtable sorts. Your engine actually decides.
Opportunity window: constant, lower ticket but a clean MVP under 2 weeks.
Difficulty: Medium
Starter prompt:
Build a small app that receives applications via a form, applies a scoring system
on [precise business criteria], and shows a balancing view of the final list
(ratios, quotas met). Ship the rules engine as a separate, configurable module.
15. "Landing page plus funnel" kit for product launches
Creators launching a product this summer (ebook, course, app) need a landing page plus a quick email capture funnel.
Pitch: The product doesn't exist yet. The page that sells it does.
Opportunity window: strong, indie launch season.
Difficulty: Easy
Starter prompt:
Generate a product launch landing page with hero, value proposition, social proof,
email capture (Mailchimp/ConvertKit), and a final CTA. HTML/Tailwind stack, deploy-ready.
16. Data cleanup and migration for small businesses
Customer databases scattered across multiple Excel files, needing merge and dedup before migrating to a real CRM. The final boss is always hiding in a tab named "Copy(3)."
Pitch: It's not messy because it's old. It's messy because nobody wanted to touch it.
Opportunity window: constant, short sales cycle.
Difficulty: Easy
Starter prompt:
Write a Python script that merges these files [list], dedupes on [key],
normalizes the format of [fields], and exports a file ready to import into [target CRM].
17. Automated e-commerce product listings
Bulk generation of SEO-optimized product descriptions from a raw data feed.
Pitch: 400 product listings by hand is a burnout. 400 product listings by script is a Tuesday.
Opportunity window: spikes before back-to-school, e-commerce sellers prep their fall catalogs.
Difficulty: Easy
Starter prompt:
Write a script that takes a CSV feed of products [columns: name, specs, category]
and generates for each: a 150-word SEO description, an optimized title, and 5 relevant keywords.
18. Bug bounty fixes on public repos
Open source maintainers pay bounties, through GitHub Sponsors, Algora, or similar, to fix specific issues. Claude Code speeds up triage and the fix. The optional boss fight that pays better than the main quest.
Pitch: The maintainer's been losing sleep over this issue for 3 months. You close it in one afternoon.
Opportunity window: constant, less competition in summer, fewer devs around.
Difficulty: Medium
Starter prompt:
Here's the GitHub issue [link/text] and its repo [structure].
Diagnose the root cause, propose a minimal fix, and write the pull request with a clear
commit message.
19. Crash course: vibe coding for non-devs
1-on-1 or small-group sessions helping beginners ship their first project with Claude Code, positioned alongside the book Vibe Coding, For Real.
Pitch: Not a course on how to code. A course on how to stop being scared of clicking "deploy."
Opportunity window: strong in summer, when people have time to learn.
Difficulty: Easy
Starter prompt:
Prepare a 90-minute session plan to get a complete beginner from zero to a deployed app,
using Claude Code. Break it into timed steps with validation checkpoints.
20. Automated print-on-demand and Etsy listings
Mockup generation, SEO descriptions, and tags for Etsy or Redbubble shops, at volume.
Pitch: Etsy's tag rules are absurd. A script follows them better than a tired human does.
Opportunity window: spikes before back-to-school and the holidays.
Difficulty: Easy
Starter prompt:
Write a script that generates, for each product in a list [CSV], an SEO-optimized Etsy title
(140 characters max), a 5-sentence SEO description, and 13 relevant tags following platform limits.
21. "Quick security audit" package for small apps
Scans for common vulnerabilities (auth, injection, exposed secrets) on vibe-coded apps, usually thrown together without much thought for security. Demo mode always hides the flaw the way an NPC hides its loot. Prod mode doesn't forgive.
Pitch: You only find the flaw after the "you died" screen shows up in prod.
Opportunity window: strong, tied directly to the wave of fast-built MVPs.
Difficulty: Medium
Starter prompt:
Audit this repo [repo] for common vulnerabilities: hardcoded secrets, injections, misconfigured
auth, overly permissive CORS, vulnerable dependencies. Rank by severity and propose the fixes.
22. Multi-format content generator for creators
A tool that takes a video or podcast and auto-generates an X thread, a LinkedIn summary, and a YouTube description, sold as a service or a tool.
Pitch: The creator already said the thing once. They shouldn't have to say it 3 more times in 3 formats.
Opportunity window: constant, strong creator demand in summer.
Difficulty: Medium
Starter prompt:
Write a script that takes a transcript [text] and generates: an 8-tweet X thread,
a 150-word LinkedIn post, and an SEO-optimized YouTube description, all from the same source content.
23. Sell directly to your own audience
The blind spot in this whole list: it treats every mission like you're starting from zero in front of a stranger. If you already have an audience, even a small one, a newsletter, readers, followers, the most profitable product isn't the most technically clever one, it's the one you sell to people who already know you. A micro-tool, a paid template, a session tied to your existing positioning. The sales cycle skips a whole step, the trust is already there.
Pitch: Your best prospect is the one who's already been reading you for 6 months.
Opportunity window: constant, but the edge fades if you wait too long.
Difficulty: Easy
Starter prompt:
Here's my audience's positioning [describe: topic, size, technical level].
Suggest 5 micro-products or services I could sell directly to this audience, reusing
content or a tool I already have, priced for an easy first purchase.
Twenty-three ways to turn an agent that writes code into a business, and only some of them actually need one.
Sources
Items 12 and 14 were sparked by scanning ideas.xyz for market signals, then rewritten under an original angle with no copy reused. ideas.xyz is the product of Arnaud "Tugan" Labossière, a French multi-millionaire marketer. It's in French, but it translates in seconds with any AI, and the ideas run deeper and are far less picked-over than Greg Isenberg's. That gap is where the real edge is.
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The article walks through 23 real side businesses you can test with Claude Code this summer, each with honest difficulty and a starter prompt. If you're shipping code that earns, grab the demo-vs-product checklist from the welcome kit so you know which of these actually becomes a product instead of a prototype that dies after launch.