# Artifacta MCP Server

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Official MCP server for [Artifacta](https://artifacta.io) — an artifact store
purpose-built for AI agents. Agents persist run outputs (files, reports,
datasets, build results) with session and agent metadata, hand them off across
sessions, and share them via expiring download links. Content-hash dedup means
re-storing the same bytes is free.

Listed in the [official MCP registry](https://registry.modelcontextprotocol.io)
as `io.artifacta/mcp`.

Two implementations with the same tool surface, error contract, and
path-confinement engine:

| Directory | Package | Runtime |
|-----------|---------|---------|
| [`typescript/`](./typescript) | [`@artifacta-mcp/mcp`](https://www.npmjs.com/package/@artifacta-mcp/mcp) | Node 20+ |
| [`python/`](./python) | [`artifacta-mcp`](https://pypi.org/project/artifacta-mcp/) | Python 3.10+ |

## Install as a Claude Code plugin

For Claude Code, the fastest path is the plugin marketplace this repo doubles
as — it wires up the hosted server *and* a skill that persists run outputs
automatically:

```text
/plugin marketplace add SagaPeak/artifacta-mcp
/plugin install artifacta@artifacta
```

This bundles the same hosted MCP connection as the Quick start below plus the
`persisting-outputs` skill (`/artifacta:persisting-outputs`, or it auto-triggers
when a session has outputs worth saving). Update the plugin with
`/plugin marketplace update artifacta`. See the
[plugin setup guide](https://docs.artifacta.io/mcp/install/claude-code-plugin).

## Quick start

The fastest way to connect is the hosted server — no install, no API key:

```bash
claude mcp add --transport http artifacta https://mcp.artifacta.io/mcp
```

On first use your client self-registers via OAuth Dynamic Client Registration
(PKCE) and opens a browser to authorize — no `ak_live_` key to copy or store.
See the [hosted setup guide](https://docs.artifacta.io/mcp/install/claude-code-hosted).

### Local / CI (stdio)

For headless, air-gapped, or CI environments where a browser OAuth flow isn't
available, run the package locally over stdio with an API key. Get a key at
[app.artifacta.io/dashboard/keys](https://app.artifacta.io/dashboard/keys),
then add to your MCP client config (Claude Desktop, Claude Code, Cursor, or any
MCP client):

```json
{
  "mcpServers": {
    "artifacta": {
      "command": "npx",
      "args": ["-y", "@artifacta-mcp/mcp"],
      "env": {
        "ARTIFACTA_API_KEY": "ak_live_..."
      }
    }
  }
}
```

Or run the Python implementation with `pipx run artifacta-mcp`.

See the per-package READMEs for config-file profiles, path confinement
(`--allow-path`), destructive-tool gating (`--allow-destructive`), and
troubleshooting: [TypeScript](./typescript/README.md) ·
[Python](./python/README.md).

## Tools

| Tool | Description |
|------|-------------|
| `whoami` | Verify credentials; returns tenant and plan info |
| `store_artifact` | Upload an artifact from inline content or a local path |
| `request_upload_url` / `complete_upload` | Two-phase presigned upload for large files |
| `get_artifact` | Fetch artifact metadata by ID |
| `get_artifact_download_url` | Get a presigned download URL (1h expiry) |
| `list_artifacts` | List/filter artifacts by session, agent, or metadata |
| `list_sessions` | List active sessions |
| `seal_session` | Seal a session so no further artifacts can be added (gated behind `--allow-destructive`) |
| `create_download_link` | Create a public expiring share link (gated behind `--allow-destructive`) |
| `delete_artifact` | Soft-delete an artifact (gated behind `--allow-destructive`, same gate as `create_download_link`) |
| `publish_artifact` | Publish an artifact as a public page at `artifacta.io/a/{slug}` (Artifact Pages); idempotent, unlisted by default |
| `unpublish_artifact` | Take down an artifact's public page; the artifact itself is untouched; idempotent |

Plus MCP resources for `whoami`, artifact metadata, artifact bytes, and
sessions.

Safety defaults: local-file uploads are confined to an explicit `--allow-path`
allow-list, and destructive tools (public share links, deletes, session seals)
are hidden from clients that can't confirm writes unless `--allow-destructive`
is passed. `publish_artifact` and `unpublish_artifact` are idempotent write
operations, not destructive ones — they are not gated behind
`--allow-destructive`.

Hosted OAuth connections (`mcp.artifacta.io`) add a second layer: the consent
screen grants one of three scopes — `artifacts:read` ⊆ `artifacts:write` ⊆
`artifacts:destroy`. All 13 tools are always advertised in `tools/list`;
calling a tool the token wasn't granted for returns a tool error with code
`insufficient_scope` naming the missing scope, and the fix is to re-authorize
with the broader scope. Scope gating applies only to hosted OAuth —
`ak_live_` API keys and local stdio remain full-access, using
`--allow-destructive` / confirmation flags instead.

## Framework integrations

The Python package ships optional adapters for
[OpenAI Agents SDK](./python/examples/openai_agents) (`pip install
'artifacta-mcp[openai-agents]'`) and
[LangChain/LangGraph](./python/examples/langchain) (`pip install
'artifacta-mcp[langchain]'`).

## Documentation

Full docs at [docs.artifacta.io/mcp/overview](https://docs.artifacta.io/mcp/overview).

## Development

```bash
# TypeScript
cd typescript && npm install && npm test

# Python
cd python && python -m venv .venv && source .venv/bin/activate
pip install -e '.[dev]' && pytest
```

This repository is published from the Artifacta monorepo; issues and PRs are
welcome here.

## License

MIT — see [LICENSE](./LICENSE).