tiun, Creem, and MCPJam: Three Tools That Install Themselves
Three of this week's biggest launches open the same way. You paste one line into your coding agent, and the tool sets itself up.
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tiun, Creem, and MCPJam: Three Tools That Install Themselves
Three of this week's breakouts open the same way. Their own front doors tell you to hand the install to your coding agent: paste one line, and the tool configures itself. That genuinely changes what setup costs a small team. It also moves the decision somewhere else, because what is left is not "how long does this take" but "what do I still own afterwards."
tiun and Creem 2.0 both want to run the money side of your product, from opposite ends. MCPJam tests the part of your product that only ever gets used from inside somebody else's AI client.
The short version: choose tiun when you have no sign-in, no billing, and no customer table, and you want all three from one vendor. Choose Creem when you already have sign-in and what is actually costing you time is tax, invoices, and paying partners. Choose MCPJam when your users reach you through an MCP server and your current test is opening a chat window and hoping.
| Tool | Best first job | Setup friction | Time to first value | Small-team price | Integration pain | Practical pick |
|---|---|---|---|---|---|---|
| tiun | Rent a whole back office instead of assembling one | Install their skills, connect their MCP server, let the agent wire it up 1 | Their claim is a paid product the same day you start building; the docs ship a sandbox with simulated payments 2 | 2.9% + 30¢ per transaction, 0.5% on subscription payments, 1.5% on payouts, $15 per dispute, analytics add-on $17/month; unlimited seats 3 | One vendor holds sign-in, the customer record, and the money — their own maker asks in public when convenience becomes lock-in 4 | Pre-revenue teams with nothing built yet |
| Creem | Hand over tax, invoices, and payouts, keep your own sign-in | Sign-up takes no card; five documented steps from store to first payment, or one prompt to their skill file 5 | Their docs say most developers reach a first payment in under 10 minutes 5 | 3.9% + 40¢ per successful sale, $0 monthly, $0 setup, payouts on the 1st and 15th 6 | You no longer decide refunds, chargebacks, or tax notices alone; their own pages disagree on how many countries they cover for tax (190+ in the docs and home page, 50+ on the pricing page) | Teams already collecting money who are drowning in tax admin |
| MCPJam | Prove your MCP server works in the clients your users are in | Open source; run it locally, in the browser, or as a desktop app, with a CLI and an SDK for the release gate 7 | Free tier is 200 credits a day, no card; an eval costs 3 credits per prompt, a simulated user swarm 5 8 | Free, then $24/month billed annually, then $199/month for teams; bring your own model keys and the free plan keeps working 8 | A reviewer who liked it still asked for a lighter entry point; the tool reads as built for a full release gate from day one 9 | Teams already shipping an MCP server to real users |
tiun: rent the whole back office
tiun is positioned as a backend you rent rather than assemble: sign-in, payments, a customer database, and analytics in one system, sold to people building with AI rather than to a platform team. It launched on September 15 and finished the week at the top of Product Hunt's board 1011.
The setup path is the part worth studying, because it is the same shape as the other two tools here. The home page says to install their skills, connect their MCP server, and let the AI agent do the hard work 1. The documentation then runs in the order you would expect: create a profile, set up your environment, create a first product, authenticate a user, and verify that authentication on your own server 2. There is a sandbox, and a documented way to simulate payments, so an honest first test is a fake checkout against a fake customer.
The pricing is component-based rather than a monthly plan, so read it slowly. 2.9% + 30¢ per transaction. Another 0.5% on subscription payments. 1.5% when they pay you out, with payouts monthly and a $200 minimum. $15 per dispute. The AI analytics add-on is $17/month, seats are unlimited, and tax compliance is included 3.
The integration pain is not the connection. It is concentration. Sign-in, the customer record, and the money all end up in one vendor, and the maker of the product asks this in his own launch thread: when does convenience become lock-in 4? Once all three live there, changing your mind is not a migration. It is a rebuild. Treat that as the cost of the convenience and decide whether you are buying it on purpose.
Choose tiun if you are starting from nothing this month and would rather rent the whole back office than wire four services together. Choose something else if you already have sign-in and a customer table you trust — you would be paying for work you have done.
Creem: hand over the money, keep your own sign-in
Creem sells one thing, and it is a role rather than a feature. Merchant of record is a legal position: Creem is the seller printed on the receipt. The sales tax, the invoices, and the chargebacks belong to them, in whatever country your customer happens to be in 12. Creem 2.0 launched with payments, tax, payouts, affiliate commissions, and usage billing — and no sign-in at all 10.
The documented setup is five steps: make a store with no card, take a test key, install the package, create a product, point a webhook at your app 5. Their docs put most developers from zero to a first payment in under 10 minutes. Test keys say so in the prefix, so you can see at a glance whether you are about to charge a real card. The agent route is a single sentence — read their skill file, and it installs the command-line tool, configures the key, creates products, and wires the webhooks 5.
The price is one rate: 3.9% + 40¢ per successful sale, no monthly fee, no setup fee, payouts on the 1st and the 15th 6.
That rate looks worse than tiun's until you finish the arithmetic. On a $50 sale, Creem takes about $2.35. tiun takes about $1.75 on the transaction, then another 75¢ when it pays you out. Run both on their published rates and they land within about 15 cents of each other. So price is not what decides this. What decides it is whether you also want sign-in and the customer record inside the same system, or you would rather keep those and hand over only the money.
Two things to check before committing. First, their own pages disagree about tax coverage: the documentation and home page say 190+ countries, the pricing page says 50+ 56. Ask which figure applies to where you actually sell. Second, the trade for giving away the legal role is control — a refund, a chargeback, and a tax notice stop being yours to decide alone.
When does a merchant of record earn its fee? Here is a real case. A developer who posted his screenshot-API side project on Hacker News explained that he is based in Colombia, where Stripe will not take him as a merchant, so he used Creem as his merchant of record: "not something I expected to spend time on" 13. That is the situation this category was built for — a founder who wants to sell globally without becoming a tax filer in countries he has never visited.
Choose Creem if you already collect money and what is eating your week is tax, invoices, and paying partners. Skip it if you do not have sign-in yet, because Creem will not sell you one, and you would be buying two things and stitching them together yourself.
MCPJam: test the surface your users actually touch
MCP is the standard that lets an AI client call tools your product exposes. If you have shipped an MCP server, your users now reach you from inside an app you do not control — and you cannot see what they asked for, how the agent interpreted it, or whether your server helped.
MCPJam is a testing and evaluation platform for exactly that surface. It calls your server from 16+ AI clients, shows you the raw request and response, and scores whether the user got what they came for 14. The founder ran MCP technical strategy at Asana before this, and his framing of the problem is the whole pitch: an external agent sits between your user and your server, inside a client that changes behaviour every other day 15.
The tooling runs locally, in the browser, or as a desktop app, with a CLI and an SDK for the release gate. The core is open source; the repository was still taking commits the day this episode was made 7.
The credits are the part worth reading, because they decide what a first test costs. Free is 200 credits a day, no card. The playground and the sign-in flow debugger cost nothing but the model tokens. An eval costs 3 credits per prompt, a simulated crowd of users 5. Pro is $24/month billed annually, a team plan $199/month 8. You can bring your own model keys, and the documentation says that keeps working after the hosted models lock on the free plan — which makes the free tier the cheapest honest way to find out whether any of this is worth paying for.
The pushback is consistent and worth hearing. A reviewer on Product Hunt liked the tool and still asked for a lighter starting point, because it reads as though it was built for the full release gate from day one 9. And on the launch thread one builder asked the honest question: the hard part is not the tooling, it is knowing what you should be checking for. The founder's answer was to test the whole chain — the connection, whether the client finds your tool, whether it picks the right one, and whether the user's goal was met — and to pair the checks you can write down with a judge for the parts you cannot 15. MCPJam also tests skills paired with a server, which matters this week because both of the other tools here hand you a skill file to install 14.
Choose MCPJam if your product now has an MCP server and your current test method is opening a chat window and hoping. If nobody is calling your server yet, wait. If you only need one client checked once, the free tier is genuinely enough.
The startup-job picks
For a first paid product, start with tiun. You are buying a whole back office, so the thing to test is how painful leaving would be — one narrow workflow, one reversible decision, then decide.
For tax, invoices, and partner payouts, start with Creem. The fee is the price of never touching a tax form, and if you already have sign-in you are not paying for anything twice.
For an agent-facing surface, start with MCPJam. Open the free tier, run one eval in the two clients your users are actually in, and see whether your server survives.
What all three share is why they belong in one episode. The install stopped being the decision, because your agent can do that in a prompt. What you are choosing is where the customer record lives, who is legally on the hook for the tax, and whether the surface your users touch actually works.
One limitation matters. This is a public-source buying screen, not a logged-in trial inside each product. The setup paths, prices, and limits here come from the vendors' own documentation and pages, plus what builders said about them in public. Verify runtime behaviour, permission details, and output quality on one real but reversible workflow before you put any of them in front of paying customers.
References
- 1tiun
tiun.io
- 2tiun documentation
docs.tiun.io
- 3tiun pricing
tiun.io
- 4tiun forum thread
producthunt.com
- 5Creem documentation
docs.creem.io
- 6Creem pricing
creem.io
- 7MCPJam source repository
github.com
- 8MCPJam pricing
mcpjam.com
- 9MCPJam on Product Hunt
producthunt.com
- 10Product Hunt weekly leaderboard, week of September 14
producthunt.com
- 11tiun on Product Hunt
producthunt.com
- 12Creem
creem.io
- 13Show HN: PixShot
news.ycombinator.com
- 14MCPJam
mcpjam.com
- 15Show HN: MCPJam
news.ycombinator.com
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