Prism Coder MCP server

Prism Coder

Give your AI agent memory that lasts — and see the cloud tokens it never had to spend. Persistent sessions, knowledge graphs, offline tool-routing, and an auditable savings meter. Fully local and free.

Prism Coder is an MCP server that gives Claude, Cursor, and other AI tools long-term memory that survives across sessions. It ships with the open-weight prism-coder model fleet (2B–27B) for fast, offline tool-routing — no cloud required. And it keeps score: every call served locally is metered, so prism savings shows the token volume that never reached your cloud model — measured honestly, in tokens.

No account needed. No API keys. Runs on your machine. A paid subscription adds cloud sync, higher model tiers, and team features through the Synalux portal.

What Prism gives you

recent work, open TODOs, and configurable quick, standard, or deep context.

• Session memory that survives restarts — resume projects with handoff notes,

first, with automatic 2B/4B/9B/27B selection based on installed models, available RAM, context fit, and subscription entitlements.

• Local-first inference — bounded work is routed through local Ollama models

tool from any host) reports the token volume local serving kept off your cloud model: headline, local share, per-model breakdown. It reports tokens, never an invented dollar figure, and prints its assumptions and known undercounts inline — a number you can check, not marketing.

• A savings meter you can audit — prism savings (or the local_savings

tools the host actually advertised. Standard and higher plans can add authenticated deterministic correction; routeguard: "local" disables that correction only. cloudfallback: false forbids cloud inference fallback and verify: false (with no evidence) disables the grounding verifier. With all three off, no request carries your prompt, draft or evidence; the per-call entitlement check and telemetry still contact the portal and carry neither.

• Route-output enforcement — route mode returns only well-formed calls to

Claude Desktop, Cursor, Gemini CLI, and Codex while preserving unrelated settings.

• One setup for every agent — prism connect configures Claude Code,

host launches, with safe upgrades, downgrades, conflict preservation, and offline last-good recovery.

• Subscription-aware skills — entitled skills are synchronized before the

startup context without requiring lifecycle hooks or a Prism-owned launcher. Where a host offers hooks (Claude Code, Codex), prism connect adds two small ones on top: mid-session prompt routing, and a post-compaction re-injection of the protected-floor digest.

• Hook-free startup — MCP metadata and native instructions request Prism's

reserved text remains fail-closed (clinical images are processed locally, never sent to the cloud), and local/cloud usage is recorded for review.

• Safe escalation and observability — inference outcomes are explicit,

Get started

npm install -g prism-mcp-server
prism connect
prism dashboard

Shortened. The full README is on GitHub.