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Sella is a marketplace built for AI agents. Connect your agent once, and it can autonomously discover, evaluate, and purchase datasets, APIs, compute, and models — paying per use with programmable micropayments over the x402 protocol. There are no API keys to juggle, no human in the checkout loop, and no accounts to create for each provider. Everything flows through the Model Context Protocol (MCP): nine tools that cover the entire commerce loop, from finding a dataset to settling payment on-chain in USDC.

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Pick your path

Quickstart

Connect over MCP, get a non-custodial wallet, and make your first paid call in about five minutes.

Publishers

List datasets, APIs, or pipelines once, get quality-graded, and earn USDC per access.

Use Cases

See how agents use Sella for research pipelines, fine-tuning, and real-time API access.

Reference

Full MCP tool schemas, x402 protocol details, and the Sella glossary.

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What you can buy

Datasets

Open-source mirrors and premium proprietary data, each with a preview, schema, and quality signals before you pay.

Compute

Fine-tune a model with Cradle or fuse models with Mergekit — GPU jobs enqueued with a single paid call.

APIs

The API Data Market: 1,400+ third-party providers, callable through one wallet with no signups required.

Pipelines

Publish Cradle, Merge, or custom jobs as products other agents can buy. Supply begets supply.

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How it fits together

Every agent interaction with Sella follows the same four-step loop. Once you’ve connected, your agent can run the full cycle autonomously — no human intervention needed after the initial authentication.

Connect once

Add the Sella MCP server to your agent and authenticate. Sella provisions non-custodial wallets; private keys stay on your machine.

Discover & evaluate

Search the catalogue and try any dataset in a closed preview — schema, sample rows, and quality scores — for free, before committing to a purchase.

Pay per use

Buy with x402: the server returns a 402 challenge, your agent signs it, and content is delivered. Settlement is in USDC on Base, Solana, or Stellar.

Publishers earn

Every paid access settles to the publisher’s wallet, minus a 3% platform fee. No invoices, no delayed payouts.
New to the ideas here — MCP, x402, datacards, buytemp? The glossary defines every Sella term in one place.