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A use case on Sella is a goal written in plain English. You hand your agent a prompt, it discovers the right providers in the API Data Market, executes the work paying per call over x402 micropayments, and delivers the result directly to you — no signups, no API keys, no subscriptions. You pay only for what actually runs.

How to read a use case

Every use case in the gallery gives you four things:

The prompt

The exact plain-English instruction you give your agent — copy it, tweak it, and run it.

The flow

What the agent does step by step, and which kinds of providers it calls along the way.

The cost

An estimated range for the whole project — plus the monthly cost if you schedule it to repeat.

The difficulty

Most tasks are Easy. None require code. A few chain several providers together and are rated Medium.
About the cost ranges. These are ballpark estimates for marketplace and API spend. The runtime x402 challenge always sets the exact price at call time, and your own agent or LLM token costs are separate. Prices fall as you narrow scope — fewer searches, fewer pages, smaller batches.

Scheduling a use case

None of these tasks are hard to run on a schedule. Point your agent’s runner — a cron job, a scheduled task, or your agent platform’s native scheduler — at the same prompt, keep the wallet funded, and set a per-run budget in SKILLS.md. A “daily newspaper” is just the same prompt fired every morning.

Explore

The gallery

Twelve ready-to-run use cases across travel, media, commerce, finance, hiring, and more.

Spawn a child model

The flagship use case: fine-tune a model for your exact task with Cradle, start to finish.