AB Tasty MCP Server
Updated June 2026✓ OfficialThe AB Tasty MCP Server connects AI coding assistants to AB Tasty's Feature Experimentation & Rollouts platform, so an agent can read live campaign and flag state from inside your editor instead of you tab-switching to the dashboard. Built by AB Tasty (flagship-io), it is officially maintained and best for Analytics.
by AB Tasty (flagship-io)
About
The AB Tasty MCP Server connects AI coding assistants to AB Tasty's Feature Experimentation & Rollouts platform, so an agent can read live campaign and flag state from inside your editor instead of you tab-switching to the dashboard. The source lives under AB Tasty's Flagship engineering org at github.com/flagship-io/mcp-server — Flagship is the feature-management product AB Tasty acquired and rebranded, which is why searching GitHub for "abtasty mcp" turns up nothing. It is MIT-licensed TypeScript and ships as the official `@abtasty/mcp-server` npm package (author field: AB Tasty). Tools split into two groups. The Decision API tools evaluate a real visitor against your campaign set: `decision_api_get_campaigns` returns every campaign matching a visitor plus context, `decision_api_get_campaign` fetches one by ID, `decision_api_get_flags` returns that visitor's resolved feature flags, and `decision_api_activate_campaign` fires an activation hit. Because they take a `visitor_id` and a context object (age, country, and any custom targeting keys), you can ask an assistant to explain exactly why a given user did or did not land in a variation. The Resource Loader API tools, added in v0.2.0, go the other direction and write configuration: `resource_loader_api_load_webexp_resources` for Web Experimentation & Personalization and `resource_loader_api_load_featexp_resources` for Feature Experimentation & Rollouts, both accepting a `dryrun` flag so you can preview before committing. They pair with the bundled `we_resource_extractor` and `fear_resource_extractor` prompts, which turn a plain-English brief ("A/B test the pricing page, red button, 50% of traffic") into the JSON resource tree those tools expect. The server also exposes AB Tasty documentation as an MCP resource and a Node.js SDK quick-start prompt. Runs stdio via npx for Claude Desktop and Claude Code, or as a Streamable HTTP server on port 3000 where per-session credentials arrive as `x-fear-env-id` / `x-fear-api-key` headers. Requires Node 18+ and an AB Tasty environment ID and API key; Resource Loader features additionally need account IDs and RCA/WE tokens, passable as CLI flags or environment variables.
Trust verdict
How grades are computed →The repository is confirmed to exist, but nothing about this server has been measured yet — no remote endpoint to handshake and no repository-freshness signal collected. Absence of evidence, not evidence of a problem.
What was measured
- Source verification100/100 · weight 25
The repository URL was confirmed to resolve against the live GitHub API and is not archived.
- Provenance90/100 · weight 10
Published and maintained by the vendor of the service it connects to, rather than by a third party.
- Listing ↔ repository match70/100 · weight 5
The linked repository flagship-io/mcp-server was confirmed to exist, but its name does not obviously correspond to this listing. Worth opening the repo before you trust the mapping.
What could not be measured
These contributed nothing to the score — not a penalty, not a zero. They are why the confidence reads the way it does.
- Live MCP handshakeunknown
No remote endpoint to handshake — this server installs and runs locally over stdio, so there is nothing to probe from the outside.
- Measured uptimeunknown
No probe history recorded for this server yet.
- Tool-schema stabilityunknown
Drift is a difference between two successive checks, and this server has none recorded.
- Repository maintenanceunknown
Repository freshness could not be read: no repo URL
Installation
npx -y @abtasty/mcp-server@abtasty/mcp-server confirmed live on the npm registry — checked August 17, 2026.
Categories
Works With
Frequently Asked Questions
What is AB Tasty MCP Server?
Who built AB Tasty MCP Server?
Is AB Tasty MCP Server free?
How do I install AB Tasty MCP Server?
What does AB Tasty MCP Server integrate with?
Repo Health
Local/stdio install — runs on your machine, so there is no remote endpoint to verify live. Trust signal below is from the source repo.
- Install
- npm
Repo recency not yet available for this server.
Quick Info
- Install Type
- npm
- Author
- AB Tasty (flagship-io)
- Categories
- 2
- Integrations
- 2
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