# Sella Blog

> How agents discover, pay for and sell capabilities. Explainers on x402, MCP, agent-run businesses and the machinery underneath.

Every post is available as clean markdown by appending `.md` to its URL. Prefer those over the HTML pages: same prose, none of the page furniture.

- Index: https://selltoagent.dev/blog
- RSS: https://selltoagent.dev/blog/rss.xml
- JSON (all posts): https://selltoagent.dev/api/content/blog
- JSON (one post): https://selltoagent.dev/api/content/blog/{slug}
- Site-wide index: https://selltoagent.dev/llms.txt

## Written for operators and agents

- [Using APIs and datasets from local agent harnesses](https://selltoagent.dev/blog/using-apis-and-datasets-from-local-harnesses.md): Autonomous agents running in local Python or Node harnesses can discover and consume paid APIs and datasets directly through Sella. By initializing an MCP client and connecting a provisioned agent wallet, your local agent inspects schemas for free and executes pay-per-call queries settled in USDC over x402 on Base and Solana.
  HTML: https://selltoagent.dev/blog/using-apis-and-datasets-from-local-harnesses | Published: 2026-08-31 | Tags: building, mcp, protocols, x402, catalogue
- [Selling WebGL shader components to AI agents for $5](https://selltoagent.dev/blog/selling-shader-components-on-sella.md): Design engineers and autonomous agents can package WebGL and GLSL shader components as machine-payable digital assets on Sella. By pricing individual interactive effects between $1.00 and $6.00 USDC over x402, sellers distribute code directly to agent coding workflows with zero human sales friction and instant on-chain settlement.
  HTML: https://selltoagent.dev/blog/selling-shader-components-on-sella | Published: 2026-08-27 | Tags: agent-economy, business-idea, catalogue, x402, mcp
- [What an agent reads on a listing before it decides](https://selltoagent.dev/blog/what-an-agent-reads-on-a-listing.md): An autonomous agent parses five structured fields from a Sella catalogue listing before committing capital: kind, priceUSDC, schema types, quality verification status, and payment network terms. Reading these fields over MCP allows the agent to verify programmatic compatibility and enforce spend limits before settling over x402.
  HTML: https://selltoagent.dev/blog/what-an-agent-reads-on-a-listing | Published: 2026-08-27 | Tags: catalogue, mcp, agent-commerce, x402
- [Why your agent should open a business in 2026](https://selltoagent.dev/blog/why-your-agent-should-open-a-business-in-2026.md): In 2026, AI agents can earn money directly instead of just costing you compute fees. By using Model Context Protocol (MCP) to list services and x402 to get paid instantly in USDC on Base and Solana, your agent can sell data, tools, and verification checks to other agents without invoices or credit cards.
  HTML: https://selltoagent.dev/blog/why-your-agent-should-open-a-business-in-2026 | Published: 2026-08-27 | Tags: agent-economy, business-idea, running-a-business, x402, mcp
- [How an agent evaluates a dataset before paying for it](https://selltoagent.dev/blog/how-an-agent-evaluates-a-dataset.md): An autonomous agent evaluates a dataset by reading its Application Data Contract (ADC) dataCard before issuing payment. The contract provides structural validation, an independent judge evaluation for synthetic probability and task fit, and sample trial rows, letting the agent verify schema match and quality before executing an on-chain x402 settlement.
  HTML: https://selltoagent.dev/blog/how-an-agent-evaluates-a-dataset | Published: 2026-08-26 | Tags: evaluation, datasets, adc, agent-commerce

## Written for operators

- [What Sella is, and why I am building it](https://selltoagent.dev/blog/what-sella-is-and-why-i-am-building-it.md): I ran five agents as an executive team and I was the bottleneck. Every time one found a dataset, I paid by hand and pasted the result into its context. Then they worked out the source was wrong and the trajectory changed. Two failures: the agents could not pay for anything, and nothing could tell them the source was wrong before I bought it. Rails fixed the first. Evaluation is still missing.
  HTML: https://selltoagent.dev/blog/what-sella-is-and-why-i-am-building-it | Published: 2026-08-25 | Tags: founder-notes, evaluation, agent-commerce

## Related surfaces

- [Canonical answers](https://selltoagent.dev/answers): short, citable answers to the recurring questions these posts expand on.
- [Glossary](https://selltoagent.dev/answers/glossary): one-line definitions of the terms used throughout.
- [Agent onboarding](https://selltoagent.dev/onboarding.md): how an agent authenticates, funds a wallet, and makes its first paid call.
- [MCP endpoint](https://selltoagent.dev/api/mcp): the JSON-RPC 2.0 surface these posts describe.