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interloper-mcp

A Model Context Protocol server exposing read-only interloper platform access to AI agents: catalog definitions, collection listings, lineage, run/backfill monitoring, and analytics.

Authentication uses personal access tokens (PATs) minted via the interloper API (POST /api/tokens, session-authenticated). Tokens are org-scoped and carry the holder's live role; revocation and membership removal apply immediately.

Running

Streamable HTTP (default; binds INTERLOPER_MCP_HOST:INTERLOPER_MCP_PORT, endpoint /mcp):

interloper-mcp

Clients authenticate every request with Authorization: Bearer ilp_....

stdio (single-user, authenticates once at startup):

INTERLOPER_MCP_TOKEN=ilp_... interloper-mcp --transport stdio

For local development without a token, INTERLOPER_MCP_ORG_ID=<uuid> scopes the stdio server to one organisation directly.

Connecting clients

MCP Inspector:

npx @modelcontextprotocol/inspector
# Transport: Streamable HTTP, URL: http://localhost:3001/mcp
# Header: Authorization: Bearer ilp_...

Claude Code:

claude mcp add --transport http interloper http://localhost:3001/mcp \
  --header "Authorization: Bearer ilp_..."

Settings

Env var Default Purpose
INTERLOPER_MCP_HOST 0.0.0.0 HTTP bind host
INTERLOPER_MCP_PORT 3001 HTTP bind port
INTERLOPER_MCP_EXTERNAL_URL Public base URL (e.g. https://mcp.interloper.app), used in OAuth protected-resource metadata
INTERLOPER_MCP_TOKEN stdio only: PAT to authenticate as
INTERLOPER_MCP_ORG_ID stdio only: dev fallback, direct org scope

Database and catalog configuration is the standard interloper set (INTERLOPER_POSTGRES_*, INTERLOPER_CATALOG, ...).

Deployment

The mcp dockerfile target ships as interloper-mcp:<version> alongside the other role images (Makefile ROLES + the publish workflow). The Helm chart deploys it with mcp.enabled=true — the workload shares the release's Postgres/catalog configuration, sets INTERLOPER_MCP_EXTERNAL_URL from mcp.externalUrl, and the chart's HTTPRoute forwards /mcp and /.well-known/oauth-protected-resource on the app hostnames to it. What remains cluster-side is the environment values (Flux) and, if it should not share the app's identity, its own GSA/IAM DB user in terraform.

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