@anthropic-ai/mcpb
MCP ServerFreeTools for building MCP Bundles
Capabilities8 decomposed
mcp bundle schema validation and compilation
Medium confidenceValidates MCP bundle configurations against the Model Context Protocol specification schema, then compiles them into optimized bundle artifacts. Uses JSON schema validation to enforce required fields, type constraints, and nested resource definitions before packaging, ensuring runtime compatibility with MCP clients and servers.
Anthropic-native MCP bundle tooling that enforces the official Model Context Protocol specification schema directly, with tight integration to Anthropic's MCP ecosystem and Claude client requirements
Purpose-built for MCP bundles by the protocol creators, whereas generic JSON schema validators lack MCP-specific constraints and context awareness
tool definition and resource bundling with dependency resolution
Medium confidencePackages multiple tool definitions, resources, and their dependencies into a single MCP bundle with automatic dependency graph resolution. Handles tool metadata (name, description, input schema), resource definitions (URIs, MIME types), and inter-tool dependencies, organizing them into a flat or hierarchical bundle structure that clients can discover and invoke.
Provides declarative tool bundling with automatic dependency resolution specifically designed for MCP's tool discovery and invocation model, handling both stateless tools and stateful resources in a single package
More specialized than generic package managers — understands MCP tool schemas and resource semantics, enabling smarter bundling decisions than npm or pip alone
mcp bundle type generation from typescript/javascript definitions
Medium confidenceGenerates MCP-compliant bundle type definitions and JSON schemas from TypeScript interfaces or JavaScript JSDoc comments. Uses AST parsing to extract function signatures, parameter types, and return types, then automatically generates the input/output JSON schemas required by the MCP specification, reducing manual schema authoring.
Bidirectional type generation that keeps TypeScript source and MCP schemas synchronized through AST analysis, enabling developers to define tools once in code and derive MCP schemas automatically
Eliminates manual JSON schema authoring for MCP tools, whereas competitors require hand-written schemas or only support runtime introspection without compile-time guarantees
bundle metadata and manifest generation
Medium confidenceGenerates comprehensive bundle manifests that describe all tools, resources, capabilities, and metadata in a machine-readable format. Creates manifest files that include tool descriptions, input/output schemas, resource URIs, version information, and capability declarations, enabling clients to discover and understand bundle contents without executing code.
Generates MCP-compliant manifests that encode full tool semantics (schemas, descriptions, capabilities) in a format optimized for client discovery and validation, not just package metadata
Purpose-built for MCP discovery semantics, whereas generic package manifests (package.json, setup.py) lack tool-level schema and capability information
bundle distribution and deployment packaging
Medium confidencePackages validated and compiled MCP bundles into distributable artifacts (tarballs, Docker images, or standalone executables) with embedded runtime configuration. Handles bundle serialization, dependency vendoring, and environment variable injection, producing artifacts ready for deployment to MCP clients or cloud platforms.
Produces MCP-aware deployment artifacts that preserve bundle semantics and manifest information through packaging, enabling clients to validate and discover bundles post-deployment
Specialized for MCP bundle distribution with manifest preservation, whereas generic packaging tools (npm pack, Docker) lose MCP-specific metadata during packaging
bundle testing and validation framework
Medium confidenceProvides testing utilities to validate bundle behavior, tool invocation, and resource access before deployment. Includes mock MCP client implementations, tool execution simulators, and assertion helpers for verifying tool schemas, input validation, and output formats match MCP specifications.
Provides MCP-specific test utilities that validate tool schemas against actual implementations and simulate MCP client behavior, going beyond generic unit testing to verify protocol compliance
More specialized than generic testing frameworks — understands MCP tool semantics and can validate schema-to-implementation alignment automatically
bundle versioning and compatibility management
Medium confidenceManages semantic versioning for MCP bundles and tracks compatibility with MCP protocol versions and client versions. Enables version constraints in bundle definitions, validates backward compatibility, and generates migration guides when breaking changes are introduced.
Tracks MCP protocol version compatibility alongside semantic versioning, enabling bundles to declare which MCP versions they support and detecting protocol-level breaking changes
Understands MCP protocol evolution, whereas generic version managers (npm, pip) only track package versions without protocol-level compatibility awareness
interactive bundle configuration and scaffolding
Medium confidenceProvides CLI wizards and scaffolding templates to generate new MCP bundle projects with boilerplate code, configuration files, and example tools. Guides developers through bundle setup with interactive prompts for bundle name, tools, resources, and deployment targets, generating a ready-to-use project structure.
MCP-aware scaffolding that generates not just boilerplate code but also MCP-compliant bundle configurations, schemas, and example tools tailored to the MCP protocol
More specialized than generic project generators (Yeoman, Create React App) — understands MCP bundle structure and generates protocol-compliant examples
Capabilities are decomposed by AI analysis. Each maps to specific user intents and improves with match feedback.
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Best For
- ✓MCP server developers building tool bundles for Claude and other LLM clients
- ✓teams standardizing MCP bundle packaging across multiple projects
- ✓developers integrating MCP into CI/CD pipelines who need automated validation
- ✓developers building multi-tool MCP servers for Claude and other LLM clients
- ✓teams creating domain-specific tool suites (e.g., DevOps tools, data analysis tools)
- ✓organizations standardizing tool distribution across multiple LLM applications
- ✓TypeScript-first teams building MCP servers who want single-source-of-truth for tool definitions
- ✓developers migrating existing Node.js tool libraries to MCP without rewriting schemas
Known Limitations
- ⚠Validation is schema-only — does not execute tool functions to verify runtime behavior
- ⚠Does not validate cross-references between tools and resources at compile time
- ⚠Limited to MCP specification version constraints — may require updates when protocol evolves
- ⚠Dependency resolution is static — does not support dynamic or conditional tool loading at runtime
- ⚠No built-in versioning system for tools within a bundle — all tools share bundle version
- ⚠Resource bundling is file-based — does not support streaming or large binary resources efficiently
Requirements
Input / Output
UnfragileRank
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Tools for building MCP Bundles
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