Apostra (formerly Scope3 and Interchange): developer marketplace

Connect a coding agent to Apostra, verify the account, and build an advertising workflow. Start with apostra-developer; install the narrower operating packages only when you need them. Packages do not grant account permissions. Apostra OAuth and server-side entitlements remain authoritative.

Start with Build software for a marketing assistant, advertising agent, data integration, or reporting service. To use Apostra in the application or with an assistant, follow Manage ads.

Regular Claude and Cowork use the hosted MCP connector. The developer plugin below is for Codex and Claude Code.

Install in Codex

codex plugin marketplace add https://github.com/apostra-public/apostra.git
codex plugin add apostra-developer@apostra

The native plugin installs both the build-with-apostra skill and the Apostra MCP connection. Ask Codex: "Review my active Meta campaigns using Apostra. Verify the exact Meta connection, advertiser mapping, and active campaign roster before reading live delivery for each exact campaign. Compare the latest seven complete days with the preceding seven. If authorization is missing, give me the secure browser URL and wait; never ask me to paste credentials. Treat a response with no delivery totals as unavailable, not zero. Show the evidence and do not change campaign state."

Codex first hands off Apostra OAuth when needed. If Meta is not connected, it returns Apostra's provider-authorization URL for the human to open. The agent continues only after it can verify the connection and read live campaign delivery.

Install in Claude Code

/plugin marketplace add https://github.com/apostra-public/apostra.git
/plugin install apostra-developer@apostra

Ask Claude Code for the same read-only campaign review. Complete each browser authorization handoff when prompted. Never paste API keys or provider credentials into a prompt.

Interactive OAuth represents the person using the coding agent. It does not create a runtime identity for finished software. Reuse an existing Apostra Agent when one exists, create one when deployed software needs its own identity and credential, or prototype safely in the available sandbox.

Install the skill in another compatible agent

npx skills add https://github.com/apostra-public/apostra.git \
  --skill build-with-apostra \
  --yes

This route installs the instructions only. Connect the agent's MCP client to https://api.apostra.com/mcp/v3, complete OAuth, and run the read-only get_status check before building.

Packages

Package	Purpose	Current canonical skills
`apostra-developer`	Plan, run, automate, and report on advertising across sellers, or build those jobs into an application.	`build-with-apostra@1.1.0`
`amc-listing`	Build and maintain an Agentic Media Company listing in Interchange.	MCP access; workflow skill forthcoming
`amc-merchandising`	Merchandise an Agentic Media Company's inventory and products in Interchange.	MCP access; workflow skill forthcoming
`amc-distribution`	Prepare and distribute an Agentic Media Company through supported agent channels.	`publish-an-openai-app@1.0.0`
`amc-campaign-management`	Operate seller-side campaigns and delivery in Interchange.	MCP access; workflow skill forthcoming
`buyer-account-setup`	Prepare an Interchange buyer account for campaign execution.	`get-account-ready-to-buy@1.6.0`
`buyer-campaign-management`	Discover sellers, create campaigns, request proposals, and manage delivery.	`buy-from-seller@1.3.0`, `set-up-a-campaign@1.21.0`, `set-up-an-event-source@1.1.0`, `manage-a-campaign@1.6.2`
`buyer-creative-management`	Prepare and inspect buyer creative inputs for campaign execution.	`inspect-tag-sheet@1.0.2`, `generate-campaign-creatives@1.12.0`
`buyer-reporting`	Inspect buyer campaign delivery and reporting in Interchange.	`set-up-an-event-source@1.1.0`
`sales-agent-testing`	Test a first-party or third-party AdCP sales agent with governed buyer workflows.	`test-sales-agent@1.5.6`
`amc-self-serve-buyer`	Bundle buyer workflows for an Agentic Media Company's own self-serve plugin.	`get-account-ready-to-buy@1.6.0`, `buy-from-seller@1.3.0`, `set-up-a-campaign@1.21.0`, `set-up-an-event-source@1.1.0`, `manage-a-campaign@1.6.2`, `inspect-tag-sheet@1.0.2`, `generate-campaign-creatives@1.12.0`

amc-self-serve-buyer is the aggregate buyer package an Agentic Media Company can bundle into its own self-serve plugin. sales-agent-testing is the package for first-party or third-party agent validation.

Skill files are composed from the canonical, versioned Interchange skill registry. When a registry current-version pointer or referenced asset changes, the source workflow opens a reviewed sync PR for this repository.

Every durable change remains confirmation-gated by the underlying Apostra tool contract. Build guides live at https://docs.apostra.com/v3/overview.

License

About this repository

This is a generated public mirror. Do not hand-edit it: the next reviewed sync will overwrite local changes. SOURCE_DIGEST records the composed content checkpoint.

apostra

Documentation