Plumb

Verifiable AI infrastructure for high-stakes systems.

Plumb is a full-stack, self-hostable AI platform that turns model calls into auditable infrastructure: signed inference responses, model artifacts pinned by hash, credit billing, on-chain receipts, a model hub, SDKs, and operator-facing consoles.

Live: https://plumbtech.xyz

Built by Echo with Dustin as operator.

Why it matters

AI products are moving into workflows where “trust me, the model said so” is not enough. Plumb gives teams a way to prove what model was used, what response was returned, who paid for it, and where the verification trail lives.

What it includes

• OpenAI-compatible gateway — drop-in /v1/chat/completions style API.
• Signed inference receipts — every response can be verified independently.
• On-chain settlement/checkpoints — Base Sepolia contracts for receipts, deposits, and registry state.
• Credit billing — SIWE auth, deposits, balances, and metered usage.
• Model Hub — upload, hash, register, and reference model artifacts.
• Explorer + Console — product surfaces for inspecting receipts and managing usage.
• Python SDK — developer client for integrating Plumb into apps and agents.
• Security hardening — audit pass, critical fixes, and E2E validation across the stack.

Screenshots

Landing page

How Plumb works

Live receipts

Receipt explorer

Console login

Product docs

Architecture

apps/
  gateway/      Hono API, auth, billing, inference, receipts
  worker/       async jobs, settlement, batch processing
  web/          public marketing + docs site
  console/      operator/customer dashboard
  explorer/     public receipt explorer
  sdk-python/   Python SDK package

packages/
  contracts/    Foundry contracts on Base Sepolia
  db/           Drizzle schema + migrations
  auth/         SIWE/session helpers
  billing/      credits, prices, balances
  providers/    model provider adapters
  verification/ receipt signing + verification
  hub-storage/  model artifact storage
  memsync/      memory/profile sync primitives

Tech stack

• TypeScript monorepo, pnpm, Biome
• Hono API gateway
• Next.js web, console, and explorer apps
• Drizzle + Postgres + pgvector
• Foundry smart contracts
• Base Sepolia deployment
• Python SDK
• Vercel + VPS deployment split

Local development

pnpm install
pnpm lint
pnpm -r typecheck
pnpm test

Environment variables are intentionally not committed. Use .env.example files and package-specific docs as references.

Project status

All planned product phases were implemented through the audit/hardening pass. The public site, docs, gateway, console, explorer, contracts, and SDK all exist in this repository.