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Apostra publishes its buyer workflows as Claude plugins. A plugin adds the Apostra connection and the skills that tell Claude how to run a workflow correctly: set up the account, build a campaign, upload creatives, launch, and read delivery. Install them so Claude follows Apostra’s workflow instead of working it out from the tool list. The plugins are in the public marketplace apostra-public/apostra. They work in Claude (web and desktop), Cowork, and Claude Code.

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Which plugins to install

A buyer installs these four: The marketplace also lists plugins for other jobs. The amc- plugins are for media companies selling on Apostra, amc-self-serve-buyer is a bundle a media company puts in its own plugin, sales-agent-testing tests a sales agent, and apostra-developer is for building software on Apostra (see the developer quickstart). A buyer does not need them. A plugin only adds instructions. What you can do still depends on your account and its permissions, and every change that commits spend still asks you to confirm it.

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Claude and Cowork

  1. Open Customize > Plugins, select Add, then Add marketplace.
  2. Enter https://github.com/apostra-public/apostra and add it.
  3. Install each of the four buyer plugins above.
  4. Open a plugin’s Connectors tab and connect Apostra. Sign in when your browser opens. Installing a plugin does not sign you in.
Skills need Code execution and file creation turned on under Settings > Capabilities. On a Team or Enterprise plan, an owner can turn off user-added plugins and skills, or code execution, for the whole organization. If Add is missing or the skills do not load, ask your Claude owner. The plugins connect to https://api.apostra.com/mcp/v3. If you already added Apostra as a custom connector (see MCP client setup), you do not need both. Keep one Apostra connection so you always know which account Claude is signed in to.

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Claude Code

Run these inside a Claude Code session:
Complete the sign-in when Claude Code first calls Apostra.

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Keep the plugins current

Apostra updates the skills as the product changes. In Claude Code, run /plugin marketplace update apostra to get new versions, or open /plugin, select the apostra marketplace on the Marketplaces tab and turn on auto-update. In Claude and Cowork, update from Customize > Plugins.

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Use one set of Apostra instructions

Turn off any other skills you use for Apostra: ones your team wrote, or older copies of Apostra skills you uploaded yourself. When two sets of instructions disagree, Claude can follow the wrong one, for example by reporting creatives as saved when they were not.
  • Claude and Cowork: turn the skill off or remove it in Customize > Skills.
  • Claude Code: open /skills, select the skill and turn it off. To turn off a whole plugin, use the Installed tab in /plugin or claude plugin disable <plugin>@<marketplace>.

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Check that Claude is using them

Start a new conversation and ask:
Claude should name the skills in the table above and read your account with get_status. If it names other skills for Apostra work, turn those off. If it cannot reach Apostra, connect the plugin’s connector again and sign in. To continue, see Manage ads.