Builder Stack index

Track what builders are actually shipping

Builder Stack is a curated discovery surface for agents, MCPs, plugins, SDKs, tools, workflows, and startup products. The first listings are being reviewed now; the live Agent API index is available while this directory is seeded.

Submit a builder product Open Agent API index

Taxonomy

One surface, multiple builder categories

Agents

seeding

AI agents, copilots, and agent products shipping today.

0 approved listings

MCPs

Model Context Protocol servers, connectors, and infrastructure.

0 approved listings

Plugins

Extensions, app plugins, and embedded AI capabilities.

0 approved listings

SDKs

planned

Developer platforms, APIs, and tooling kits for AI shipping.

0 approved listings

Tools

planned

Builder utilities, infra tools, and technical products worth tracking.

0 approved listings

Workflows

planned

Cloneable automations, recipes, and browser or agent workflows.

0 approved listings

Startup products

planned

Newly launched AI startup products and technical artifacts.

0 approved listings

Directory beta

SDKs listings

Open live Agent API index

This category is being seeded

We are reviewing the first entries instead of publishing an empty or unverified directory.

Submit a builder product Browse verified API metadata

Coming next

MCPs, plugins, SDKs, and startup products

This shell is the first step toward a broader builder launch index. Next up are MCP directories, plugin and SDK launches, and links between funding, company pages, and technical product pages.

See the utility wedge