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cloister
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cloister

Active·★ 13·AGPL-3.0·Updated 2026-10-14

Cloister is a platform designed to bundle AI tooling and serve it through a single, traceable endpoint, compatible with various AI harnesses like Claude Code and Cursor. It ensures tools operate securely by isolating secrets, logging every call for auditability, and providing consistent deployment across local and production environments.

#AI Tooling#Edge Router#Serverless#Security#Traceability#Credential Management#Containerization
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Guides
#Workerd
$ Install
$ leyline daemon --mcp-port 8384 && pnpm install && task dev:bootstrap && task dev
↗ Visit site★ GitHub
01

Features

01Secure Credential Isolation: Tools never directly access secrets; Cloister handles API calls, preventing leaks.
02Comprehensive Audit Trail: Every state-changing call generates a signed, tamper-evident receipt for verification.
03Consistent Deployment: The exact same configuration runs locally and deploys to Cloudflare Workers without modification.
04Protocol Agnostic Routing: Functions as an edge router and bundle host, supporting MCP and other HTTP-shaped tenants.
05Containerized Tools with Sandboxing: Each tool runs in its own sandboxed Workerd isolate for enhanced security.
02

Compatibility

Cloudflare Workers
Deployment
Verified via docs
Workerd
Runtime
Verified via docs
macOS
Host OS
Verified via docs
Linux
Host OS
Verified via docs
TypeScript
Language
Verified via docs
03

Quick start

1
$ leyline daemon --mcp-port 8384
2
$ pnpm install
3
$ task dev:bootstrap
4
$ task dev
04

Use cases

↳Bundling and serving custom AI agent tools for external harnesses like Claude Code or Cursor.
↳Deploying AI tooling with consistent configurations from local development to Cloudflare Workers production environments.
↳Ensuring secure execution of AI tools by preventing direct access to sensitive API keys and tokens.
↳Maintaining an auditable record of all AI tool interactions for compliance and post-factum verification.
05

Alternatives

⚡Top VS:
VSgpu-mcp-server★15→VSharnessrouter★3.2k→VSyomo★1.9k→

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agentic-research /
cloister
↗

Workerd-based hypervisor with a declarative Cap'n Proto manifest. Substrate-level identity, audit, and per-bundle credential scoping. Today's primary application: hosting MCP servers behind one HTTP face.

13AGPL-3.0
Last commit1w ago
StatusActive
CategoryLLM Infra
Links
Documentation↗Discussion↗Issues↗Releases↗
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