CozyVTT-Agent
Exposes CozyVTT campaign capabilities as an MCP Streamable HTTP server, enabling MCP clients to interact with campaigns while CozyVTT handles authorization, command execution, and audit.
README
CozyVTT-Agent
CozyVTT-Agent is an installed, trusted CozyVTT plugin that adapts the host's campaign-scoped capability interface to MCP Streamable HTTP. CozyVTT owns OAuth, campaign authorization, approvals, command execution, replay, audit, and result validation. This plugin owns MCP protocol behavior only.
It does not import CozyVTT backend code, access its database, or proxy through an agent-specific HTTP API.
Development
npm install
npm test
Build an Installable Package
Use the same review key configured in CozyVTT. The command creates a bundled,
signed package under build/cozyvtt-agent/ and prints its immutable checksum.
TRUSTED_EXTENSION_REVIEW_KEY=local-review-key npm run package:extension
Configure CozyVTT with:
EXTENSION_PACKAGE_ROOT=/path/to/CozyVTT-Agent/build
TRUSTED_EXTENSION_REVIEW_KEY=local-review-key
TRUSTED_EXTENSION_ALLOWLIST='[{"extensionId":"cozyvtt.agent","version":"0.2.0","checksum":"sha256:..."}]'
An administrator can then install and activate cozyvtt.agent through the
generic extension administration API. Its MCP resource is exposed at
/api/plugin-transports/cozyvtt.agent/mcp; OAuth discovery and token issuance
are provided by CozyVTT.
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