Interloper MCP server — read-only platform access for AI agents
Project description
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 (not yet wired)
The container target would follow the existing dockerfile pattern:
FROM base AS build-mcp
COPY packages ./packages
RUN docker/uv-sync.sh interloper-core interloper-assets interloper-db interloper-toolkit interloper-mcp
FROM runtime AS mcp
COPY --from=build-mcp /interloper/.venv /interloper/.venv
USER app
EXPOSE 3001
CMD ["interloper-mcp"]
plus a mcp role in the Makefile/publish workflow, a Helm/Flux workload
(apps/interloper/mcp/ with an HTTPRoute for mcp.interloper.app — wildcard
DNS + TLS already cover it), and its own GSA/IAM DB user in terraform if it
should not share the app's identity.
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