Show HN: GETadb.com – every GET request creates a DB

Show HN: GETadb.com – every GET request creates a DB(getadb.com)

39 points by nezaj 10 days ago | 44 comments

Hey HN! We made GETadb.com, so it's easier to get agents to build you full stack apps. You don't need to give them any credentials. Just by loading a GET request, they get access to a database, a sync engine, and abstractions for auth, presence, and streams.

To see what the agent sees, you can load https://getadb.com/new

There's two fun things about how it's implemented:

1. If you curl the home page, it the agent content rather than human content. We do this by detecting the 'Sec-Fetch-Mode' header. It's not perfect, but gets the job done for Claude Code et al.

2. For an agent to spin up an app, they make _two_ fethes. (1) getadb.com/guide tells them to generate a uuid, and fetch (2) getadb.com/provision/<uuid>. We did this, because just about half of the popular web-based app builders cache URLs globally, even if you return no-store headers. To get around this we just instruct the agent to generate unique URLs

You may wonder: Why GET requests, rather than POST requests? It's because then you can build in surprising places. For example, we get meta.ai to build an app inside the artifact preview: https://artifacts.meta.ai/share/a/b80c7412-c3af-4088-b430-78efdfe8ea2d

Under the hood, this is possible because the whole infra is mult-tenant from ground up. We already announced how that works on HN, but if you're curious here's the essay for it: https://www.instantdb.com/essays/architecture

offmycloud 10 days ago |

The GET request method is supposed to be safe.

"Request methods are considered 'safe' if their defined semantics are essentially read-only; i.e., the client does not request, and does not expect, any state change on the origin server as a result of applying a safe method to a target resource." -RFC 9110 section 9.2.1

https://www.rfc-editor.org/rfc/rfc9110.html#name-safe-method...

stopachka 10 days ago | |

Here's my argument:

In practice many GET requests don't adhere to this spec. For example, when you load a page, your "view" generally changes lots of things on the backend. Those changes come back to you in ways too: for example, consider view counts on Youtube videos or X posts.

sandeepkd 9 days ago | | |

These are just conventions, one can pretty much do whatever they want in their applications. At the same time convention has its own advantages (most of the times, think about code maintenance). Its still along the excepted line as long as the mutations are side effects of the GET request. Somewhere down the line the intent is to provide a separation to easily understand the systems.

noman-land 9 days ago | | |

The GET request is issued to the web server for content of the HTML page and then all the scripts. Then the scripts issue POST/PUT requests to the analytics server updating the count.

apsurd 10 days ago |

I found https://www.instantdb.com/about very interesting; you built a new database! The triples stuff is cool.

For GETadb, it's a conflicting sell. The people that need "a db solved by AI" and fully abstracted are using app builders no? lovable, v0, manus. The people the are closer to the code and need an instant db would look to sqlite, render, supabase, neon. I'm all for another option, but then there's the realization that instandb is a new kind of db and I need to research into the value-prop vs the initial persona: "just solve my db problem with AI".

disclaimer: I'm a professional developer, doing an honest review. I may play around with it separately, later. So this marketing site did its job!

stopachka 10 days ago | |

One place where a tool like GETadb can be helpful, is when you as a developer wanted to build a quick demonstration. For example one of co-founders Joe saw a tweet about how VCs were ranked. He pointed Instant to an agent, made a quick polling app, and got 600 votes [1].

We hope delightful experiences like that then prod hackers to dive deeper and use Instant for startups.

[1] https://x.com/JoeAverbukh/status/2028544576206860697

nezaj 10 days ago | |

When you're experimenting on ideas, it's really nice when time to hello world is near zero. It's also nice when you aren't limited to a certain number of dbs or your projects get paused. This makes it so much more delightful to hack.

When you do want to get closer to the code, we think Instant provides a nicer abstraction for working with agents and getting deligthful experiences like a sync engine out of the box

apsurd 9 days ago | | |

You are right about the activation energy to throw up anything new really comes down to a hosted db that won't rot. My initial experience with supabase was incredible in that sense: any client-side framework I wanted, deployed statically while still integrating with full Postgres, for free!

Problem is supabase rots. And turning that project into anything meaningful is basically undoing everything you got for free up front.

My solution today is sqlite. I'm not diehard typescript so it turns out traditional backend apps like rails running sqlite on tiny/free hardwire is pretty nice.

That said, client-side runtime will always be alluring because it can be deployed statically. So you've got something there that I'll check out.

kmoser 10 days ago |

> For credentials and instructions, fetch http://www.getadb.com/guide and follow the steps.

http, not https?

stopachka 10 days ago | |

Oi! Updated. Should be live in a few minutes, but here's the PR: https://github.com/instantdb/instant/pull/2642

runako 9 days ago |

> we get meta.ai to build an app inside the artifact preview

Is this the kind of use case that is seen as valuable?

I joked a while back that LLM-brain was going to have people building bespoke apps on each HTTP request, and people thought I was exaggerating!

stopachka 9 days ago | |

> Is this the kind of use case that is seen as valuable?

I think it could be. Consider an argument like this:

It's valuable to ask ChatGPT questions and receive text responses. Some of the responses are more valuable when they don't just return text, but some markup: bolding, adding visualizations etc. Why can't some responses be more valuable if they return little apps?

One place where I've wanted this myself are with using LLMs for long-running goals I have. For example, I do my blood work about once a year, and I use the results to make changes and track. For a long time I had a long chat thread with ChatGPT. Now I have a little app instead.

An extreme version of this starts to turn responses into more and more fully-fledged apps. I did an experiment recently with creating a personal finance app. I found customizing the app to my specific needs made it much more valuable to me then generic personal finance apps, which have much more effort put it, but aren't tailored to my needs [^1]

[^1]: more on this experiment here: https://x.com/stopachka/status/2040982623636607009

wewewedxfgdf 10 days ago |

So, give your LLM a URL and tell it to follow the instructions there?

Err, no thanks.

stopachka 10 days ago | |

Most LLMs in practice already read URLs. If you ask them a question they don't know, they will search and read pages.

reassess_blind 9 days ago |

I’ve tried this and I like it. I’d like a platform like Instant but with the addition of a web based text editor and Claude Code / Codex terminal (provide own subscription/api key) that lets you create and edit (create previews, then promote to production) the app from the same interface, alongside the managed db.

debarshri 10 days ago |

The agent thing is going a bit out of hand here.

stopachka 10 days ago | |

Admittedly stateful GET requests are heretical, but it may be the future!

dennisy 10 days ago |

This is very cool!

But why do we need this? An agent can just have a local DB using SQLite for example.

stopachka 10 days ago | |

Two reasons this could make sense:

1. With this, agents can actually deploy a full backend with their credentials [^1].

2. If your agent ever wants to add auth, or real-time presence, or file uploads, or streams, they'll be able to do that too

[^1] Alas we don't offer static site hosting, so to push the website you would need to use something like a vercel cli.

noitpmeder 9 days ago | | |

Are neither of those things possible with a sqlite backend??? Why would one ever reach for this bespoke database tech

aleda145 10 days ago |

I appreciate this part of the agent instructions: `AESTHETICS ARE VERY IMPORTANT. All apps should LOOK AMAZING and have GREAT FUNCTIONALITY!`

stopachka 10 days ago | |

Thank you! Yeah, it is surprising how magic words can impact the performance of LLMs

swyx 10 days ago | | |

do you actually know or are you just guessing

reassess_blind 9 days ago | |

Trump's tweet style might be onto something.

fuckinpuppers 9 days ago | | |

I thought the same thing!

Retr0id 10 days ago |

The biggest problem I see with vibecoded apps attached to a db is that the db is configured with exactly 0 access control (even if whatever backend does support it), and anyone can turn up and SELECT * FROM users, or even DROP TABLE users. How do you mitigate this?

stopachka 10 days ago | |

Good question. Two ways:

1. For the users table specifically, we have a default rule that says `"view": "auth.id == data.id"`. This way even if the the user (or AI) did not set access controls, user data is protected by default.

2. In the instructions file given to the agent (https://www.getadb.com/provision/new), we specifically mention permissions and how to push them. We found this prods the agent to push perms.

RIMR 9 days ago |

reading https://www.getadb.com/guide

> Generate a random UUID yourself and use a different UUID each time.

LLMs are terrible at this. If you are relying on this to prevent collisions, it will fail badly.

stopachka 9 days ago | |

The UUID doesn’t actually affect the response. Every GET request still generates unique credentials each time, no matter what the value is that passes to /provision/<uuid>

We added it to help the app builders that do a lot of caching get unique responses. Turns out even if you set no-store cache headers, some app builders cache the pages. We tested this idea with those app builders and saw that they did generate uuids each time.

lucb1e 10 days ago |

I thought this would be something about getting (downloading?) the Android Debug Bridge tool (adb) until I read further. Might want to capitalize DB as well (GETaDB), at least from my pov

stopachka 10 days ago | |

Ah, good point. We can't change the title now though.

replwoacause 8 days ago |

The logo looks awfully identical to https://www.instantdb.com

danpalmer 9 days ago |

> Remember! AESTHETICS ARE VERY IMPORTANT. All apps should LOOK AMAZING

Why are your database instructions giving instructions about the UI design?

stopachka 9 days ago | |

Instant gives you a database, but it also gives you a sync engine that you can use in the frontend. We included this instruction because you would ideally use this to build an app.

danpalmer 9 days ago | | |

Right but it's not your responsibility to direct the UI. Your responsibility is backend services, possibly at a stretch, the architecture of apps as they relate to using those backend services, but it's most definitely not the aesthetics.

What if the app is headless and the LLM tries to stick a UI on it? What if the app is a TUI and the LLM gets stuck on terminal fonts? What if my UI aesthetic is grungy hackercore and the LLM tries to make it look like every other Tailwind website?

This criticism/feedback is less about what's written, and more about why it was deemed appropriate. You're getting direct input to the development process of your customer's products, and you're using that responsibility to... make pointless comments about design?

avinassh 7 days ago |

I'd love to learn how the database is built and the sync works

reassess_blind 9 days ago |

Is there an easy way to export all data to a format friendly with Postgres?

stopachka 9 days ago | |

Currently we recommend folks to write a script with the admin sdk. Efficient import / export is on the roadmap!

borplk 9 days ago |

Gimmickmaxxing?