TmpState.dev Reviews and Details

Questions & Answers

1. What makes TmpState.dev unique?

   TmpState is a tokenless temporary JSON database. One curl tmpstate.dev creates a real database and returns its URL - and that URL is the only credential. No signup, no API keys, no .env, no OAuth.

   • Zero credentials by design. The database URL is a capability (30+ characters of entropy, hashed at rest), the same trust model as an unguessable Google Docs share link. Nothing to provision, rotate, or leak into a repo.
   • Agent-native. It is also a zero-key remote MCP server, so an AI agent can create and use its own backend with no auth handshake - it self-onboards from llms.txt.
   • Ephemeral by default. Databases are free for 24 hours and expire automatically unless you keep them, so nothing lingers or bills silently.
   • Honest, transparent pricing. Free for 24h, one-time extensions from $1, always-on Pro at $8/month. Every charge is disclosed before it is billed.

2. Why should a person choose TmpState.dev over its competitors?

   Compared to jsonbin.io, npoint.io, json-server, or standing up Firebase/Supabase, TmpState removes the entire setup step:

   • No account and no keys - you get a working database from a single request, versus signing up and managing credentials elsewhere.
   • Faster to first write - one curl, not a dashboard, a project, and a connection string.
   • Built for agents - a native MCP server means your AI agent wires up its own storage instead of you pasting secrets into it.
   • Safe to abandon - deletion by default means no orphaned data or surprise bills; you only pay ($1 extension or $8/month Pro) when the data actually matters.

   Best for throwaway and prototype state. It is honest about when not to use it: it is not meant to be your permanent production database.

3. How would you describe the primary audience of TmpState.dev?

   Developers and the AI agents working on their behalf. Primarily:

   • Builders using AI coding agents (Claude Code, Cursor, and similar) who want their agent to provision its own backend.
   • Indie hackers and solo builders prototyping quickly across several projects.
   • Hackathon participants who need a backend in the next ten minutes and will not sign up for anything.
   • Anyone who needs disposable, short-lived JSON storage without the ceremony of a full database.

4. What's the story behind TmpState.dev?

   TmpState came out of a recurring frustration in agent workflows: AI agents constantly need somewhere to keep state, but you cannot hand them your real cloud credentials, and wiring up a database mid-task kills the flow. So the model was inverted - build a database where the URL itself is the only credential, so an agent (or a person with one curl) can create its own backend instantly, with nothing to sign up for and nothing to leak. It is a solo, founder-built, agent-first product, launched in July 2026.