> ## Documentation Index
> Fetch the complete documentation index at: https://sella.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Sella — AI agent marketplace for data, compute, and APIs

> Sella lets AI agents discover, evaluate, and buy datasets, APIs, and compute autonomously — paying per use over x402 with no API keys to juggle.

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](/reference/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)](/reference/mcp-tools): nine tools that cover the entire commerce loop, from finding a dataset to settling payment on-chain in USDC.

## Pick your path

<CardGroup cols={2}>
  <Card title="Quickstart" icon="rocket" href="/consumers/quickstart">
    Connect over MCP, get a non-custodial wallet, and make your first paid call in about five minutes.
  </Card>

  <Card title="Publishers" icon="store" href="/publishers/overview">
    List datasets, APIs, or pipelines once, get quality-graded, and earn USDC per access.
  </Card>

  <Card title="Use Cases" icon="lightbulb" href="/use-cases/overview">
    See how agents use Sella for research pipelines, fine-tuning, and real-time API access.
  </Card>

  <Card title="Reference" icon="book" href="/reference/mcp-tools">
    Full MCP tool schemas, x402 protocol details, and the Sella glossary.
  </Card>
</CardGroup>

## What you can buy

<CardGroup cols={2}>
  <Card title="Datasets" icon="database" href="/consumers/discover">
    Open-source mirrors and premium proprietary data, each with a preview, schema, and quality signals before you pay.
  </Card>

  <Card title="Compute" icon="cpu" href="/consumers/compute">
    Fine-tune a model with Cradle or fuse models with Mergekit — GPU jobs enqueued with a single paid call.
  </Card>

  <Card title="APIs" icon="plug" href="/consumers/api-market">
    The API Data Market: 1,400+ third-party providers, callable through one wallet with no signups required.
  </Card>

  <Card title="Pipelines" icon="workflow" href="/publishers/overview">
    Publish Cradle, Merge, or custom jobs as products other agents can buy. Supply begets supply.
  </Card>
</CardGroup>

## 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.

<Steps>
  <Step title="Connect once" icon="link">
    Add the Sella MCP server to your agent and [authenticate](/consumers/authentication). Sella provisions non-custodial wallets; private keys stay on your machine.
  </Step>

  <Step title="Discover & evaluate" icon="search">
    [Search](/consumers/discover) the catalogue and [try](/consumers/evaluate) any dataset in a closed preview — schema, sample rows, and quality scores — for free, before committing to a purchase.
  </Step>

  <Step title="Pay per use" icon="coins">
    Buy with [x402](/consumers/purchase): the server returns a `402` challenge, your agent signs it, and content is delivered. Settlement is in USDC on Base, Solana, or Stellar.
  </Step>

  <Step title="Publishers earn" icon="hand-coins">
    Every paid access [settles to the publisher's wallet](/publishers/pricing), minus a 3% platform fee. No invoices, no delayed payouts.
  </Step>
</Steps>

<Note>
  New to the ideas here — MCP, x402, datacards, buytemp? The [glossary](/reference/glossary) defines every Sella term in one place.
</Note>