{"passport":{"unfragile":{"@version":"1.0","version":"2026-05","artifact":{"id":"npm_npm-mcp-from-openapi","slug":"npm-mcp-from-openapi","name":"mcp-from-openapi","type":"mcp","url":"https://www.npmjs.com/package/mcp-from-openapi","page_url":"https://unfragile.ai/npm-mcp-from-openapi","categories":["mcp-servers","deployment-infra"],"tags":["mcp","model-context-protocol","openapi","swagger","api","rest","schema","json-schema","typescript","tool-generator","anthropic","claude"],"pricing":{"model":"open_source","free":true,"starting_price":null},"status":"active","verified":false},"capabilities":[{"id":"npm_npm-mcp-from-openapi__cap_0","uri":"capability://code.generation.editing.openapi.to.mcp.schema.transpilation.with.type.preservation","name":"openapi-to-mcp schema transpilation with type preservation","description":"Converts OpenAPI 3.0/3.1 specifications into MCP-compliant tool definitions by parsing JSON Schema components, extracting endpoint metadata, and generating typed tool schemas that preserve parameter constraints, response types, and authentication requirements. Uses a multi-pass AST-like traversal to map OpenAPI path items, operation objects, and parameter definitions into MCP's tool input/output schema format while maintaining JSON Schema validation semantics.","intents":["I want to expose my REST API as MCP tools without manually writing tool definitions","I need to automatically generate Claude-compatible tool schemas from my existing OpenAPI documentation","I want to ensure type safety and validation constraints are preserved when converting API specs to MCP"],"best_for":["Teams maintaining REST APIs who want to expose them to Claude/LLM agents via MCP","Developers building LLM agent frameworks that need to dynamically load API integrations","API-first companies automating tool generation for multiple LLM providers"],"limitations":["OpenAPI 2.0 (Swagger) support may be limited or require pre-conversion to 3.0 format","Complex discriminator patterns and polymorphic schemas may not fully transpile to MCP constraints","Custom OpenAPI extensions outside standard spec are not preserved in MCP output","No built-in handling for API authentication flows beyond basic header/query parameter mapping"],"requires":["Node.js 16+ or TypeScript 4.5+","Valid OpenAPI 3.0+ specification (JSON or YAML format)","MCP SDK or compatible MCP server runtime"],"input_types":["OpenAPI specification (JSON)","OpenAPI specification (YAML)","OpenAPI URL (remote spec)"],"output_types":["MCP tool definition (JSON)","TypeScript type definitions","Tool registry (structured JSON)"],"categories":["code-generation-editing","tool-use-integration"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"npm_npm-mcp-from-openapi__cap_1","uri":"capability://data.processing.analysis.batch.api.endpoint.to.tool.mapping.with.parameter.extraction","name":"batch api endpoint-to-tool mapping with parameter extraction","description":"Processes all endpoints in an OpenAPI spec in a single pass, extracting path parameters, query parameters, request bodies, and response schemas for each operation, then maps them to individual MCP tool definitions with proper input/output typing. Handles HTTP method semantics (GET vs POST) and parameter location rules (path vs query vs header vs body) to generate contextually appropriate tool schemas.","intents":["I want to convert all endpoints in my API spec to MCP tools in one operation","I need to automatically extract and categorize parameters from multiple API endpoints","I want to generate a complete tool registry from a single OpenAPI document"],"best_for":["API providers with large endpoint catalogs (50+ endpoints) needing bulk tool generation","MCP server developers building dynamic tool loaders from API specs","Teams automating integration testing between API specs and LLM tool definitions"],"limitations":["Large OpenAPI specs (>10MB) may cause memory overhead during parsing and transpilation","Duplicate or conflicting endpoint definitions in the spec are not deduplicated automatically","Parameter naming conflicts across endpoints (e.g., same param name with different types) may cause tool naming collisions","No built-in filtering or selective endpoint inclusion — all endpoints are converted"],"requires":["OpenAPI specification with complete operation definitions (operationId recommended)","Node.js 16+ runtime","Sufficient memory for spec parsing (typically <500MB for standard specs)"],"input_types":["OpenAPI specification (JSON/YAML)","OpenAPI spec URL"],"output_types":["Array of MCP tool definitions","Tool registry JSON","TypeScript tool type definitions"],"categories":["data-processing-analysis","code-generation-editing"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"npm_npm-mcp-from-openapi__cap_2","uri":"capability://data.processing.analysis.json.schema.to.mcp.input.schema.compilation.with.constraint.preservation","name":"json schema to mcp input schema compilation with constraint preservation","description":"Translates OpenAPI's JSON Schema definitions (including constraints like minLength, pattern, enum, required fields) into MCP's input schema format, preserving validation semantics while adapting to MCP's tool parameter structure. Handles nested objects, arrays, and schema composition patterns (allOf, oneOf, anyOf) by flattening or nesting appropriately for MCP's flat parameter model.","intents":["I want to preserve API parameter validation rules when converting to MCP tools","I need to ensure LLM agents understand parameter constraints (min/max, patterns, enums) from my API spec","I want to convert complex nested JSON request bodies into MCP tool input schemas"],"best_for":["API teams ensuring LLM agents respect parameter constraints and validation rules","Developers building type-safe MCP tool wrappers around REST APIs","Teams needing to maintain schema consistency between API spec and LLM tool definitions"],"limitations":["Deeply nested schemas (>5 levels) may be flattened or simplified, losing structural clarity","Schema composition patterns (oneOf, anyOf) are converted to union types which MCP may not fully support","Custom JSON Schema keywords (e.g., examples, default) are dropped in conversion","No validation that generated MCP schemas are semantically equivalent to original OpenAPI schemas"],"requires":["OpenAPI spec with complete schema definitions","JSON Schema draft 7 or later compatibility"],"input_types":["JSON Schema object (from OpenAPI components)","OpenAPI parameter definitions"],"output_types":["MCP input schema (JSON)","TypeScript type definitions"],"categories":["data-processing-analysis","code-generation-editing"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"npm_npm-mcp-from-openapi__cap_3","uri":"capability://code.generation.editing.response.schema.extraction.and.output.type.generation","name":"response schema extraction and output type generation","description":"Extracts response schemas from OpenAPI operation definitions (200, 201, 400, 500 status codes) and generates MCP tool output schemas that describe the expected return type and structure. Maps HTTP status codes to success/error outcomes and includes response headers and content-type information in the tool definition.","intents":["I want LLM agents to understand what data structure they'll receive from API calls","I need to generate type definitions for API responses to ensure type safety in MCP tools","I want to document error responses and status codes in MCP tool definitions"],"best_for":["Developers building type-safe MCP tool wrappers that need response type information","Teams using LLM agents that need to understand API response structures for downstream processing","API teams documenting response contracts in MCP tool definitions"],"limitations":["Only extracts schemas for documented response codes; undocumented responses are not captured","Response headers are not typically included in MCP output schemas","Polymorphic responses (different schemas per status code) may not be fully represented","No validation that response schemas match actual API behavior at runtime"],"requires":["OpenAPI spec with complete response definitions","Responses section in operation definitions"],"input_types":["OpenAPI response object","JSON Schema response definitions"],"output_types":["MCP output schema (JSON)","TypeScript response type definitions"],"categories":["code-generation-editing","data-processing-analysis"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"npm_npm-mcp-from-openapi__cap_4","uri":"capability://safety.moderation.authentication.and.security.scheme.mapping.to.mcp.tool.context","name":"authentication and security scheme mapping to mcp tool context","description":"Parses OpenAPI security schemes (API keys, OAuth2, HTTP Basic, Bearer tokens) and generates MCP tool definitions that indicate required authentication context. Maps security requirements from OpenAPI to tool metadata that MCP servers can use to inject credentials or enforce authentication policies at runtime.","intents":["I want MCP tools to indicate which authentication credentials are required","I need to ensure LLM agents only call APIs when proper credentials are available","I want to document security requirements in generated MCP tool definitions"],"best_for":["Teams exposing authenticated APIs via MCP and needing to enforce credential requirements","MCP server developers building credential injection layers for API tools","API providers documenting security requirements in tool definitions"],"limitations":["MCP does not have native support for complex OAuth2 flows; only basic credential mapping is supported","Security scheme details (scopes, endpoints) are not fully preserved in MCP format","No built-in credential injection or token refresh mechanisms — requires external implementation","Cannot enforce fine-grained authorization (e.g., scope-based access control) at the MCP level"],"requires":["OpenAPI spec with security schemes defined","MCP server with credential context support"],"input_types":["OpenAPI security scheme definitions","OpenAPI security requirements"],"output_types":["MCP tool metadata with auth requirements","Tool description with security notes"],"categories":["safety-moderation","tool-use-integration"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"npm_npm-mcp-from-openapi__cap_5","uri":"capability://code.generation.editing.tool.naming.and.description.generation.from.openapi.metadata","name":"tool naming and description generation from openapi metadata","description":"Generates human-readable tool names and descriptions from OpenAPI operation summaries, descriptions, and tags, creating clear, contextual naming that helps LLM agents understand tool purpose and usage. Uses operation summaries as tool descriptions and tags to organize tools into logical groups.","intents":["I want generated MCP tools to have clear, descriptive names that LLM agents can understand","I need tool descriptions that explain what each API endpoint does","I want to organize tools by functional category using OpenAPI tags"],"best_for":["Teams ensuring LLM agents have clear tool semantics and can select appropriate tools","API providers with well-documented OpenAPI specs wanting to preserve that documentation","Developers building user-facing MCP tool catalogs that need readable descriptions"],"limitations":["Tool naming relies on OpenAPI summaries/descriptions; poorly documented specs produce poor tool names","Generated names may exceed MCP's tool name length limits (typically 64 chars) and require truncation","Tags are not directly supported in MCP tool definitions; grouping must be handled separately","No intelligent name deduplication if multiple endpoints have identical summaries"],"requires":["OpenAPI spec with operation summaries and descriptions","Well-formatted summary text (ideally <100 chars)"],"input_types":["OpenAPI operation summary","OpenAPI operation description","OpenAPI tags"],"output_types":["MCP tool name (string)","MCP tool description (string)","Tool category/tag metadata"],"categories":["code-generation-editing","text-generation-language"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"npm_npm-mcp-from-openapi__cap_6","uri":"capability://code.generation.editing.typescript.type.definition.generation.for.tool.inputs.and.outputs","name":"typescript type definition generation for tool inputs and outputs","description":"Generates TypeScript interfaces and types for MCP tool inputs and outputs based on OpenAPI schemas, enabling type-safe tool implementations and client code. Produces .d.ts files or inline type definitions that match the generated MCP tool schemas, supporting both strict typing and optional fields based on OpenAPI requirements.","intents":["I want TypeScript type definitions for the MCP tools generated from my API spec","I need to ensure type safety when implementing MCP tool handlers","I want to generate client code that's type-safe when calling MCP tools"],"best_for":["TypeScript developers building MCP tool implementations with type safety","Teams generating both MCP tools and TypeScript client libraries from OpenAPI specs","Developers using IDEs with TypeScript support for autocomplete and type checking"],"limitations":["Generated types may not perfectly match runtime behavior if OpenAPI spec is inaccurate","Complex schema patterns (discriminated unions, recursive types) may generate verbose or hard-to-read types","No support for custom type transformations or branded types","TypeScript-only output; no support for other typed languages (Python, Go, Rust)"],"requires":["TypeScript 4.5+","OpenAPI spec with complete schema definitions"],"input_types":["OpenAPI schema definitions","MCP tool definitions"],"output_types":["TypeScript interface definitions","TypeScript type definitions (.d.ts)","TypeScript type union definitions"],"categories":["code-generation-editing"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"npm_npm-mcp-from-openapi__cap_7","uri":"capability://tool.use.integration.mcp.server.integration.and.tool.registration","name":"mcp server integration and tool registration","description":"Provides utilities to register generated MCP tools with an MCP server runtime, handling tool registration, input validation, and error handling. Includes adapters for popular MCP server frameworks and patterns for wrapping API calls with proper error handling and response transformation.","intents":["I want to easily register generated tools with my MCP server","I need to wrap API calls with error handling and response transformation","I want to validate tool inputs before calling the API"],"best_for":["Developers building MCP servers that expose REST APIs as tools","Teams automating MCP server setup and tool registration","Projects needing to integrate generated tools with existing MCP server code"],"limitations":["Integration patterns are specific to certain MCP server frameworks; custom servers may require manual adaptation","No built-in retry logic or rate limiting for API calls","Error handling is basic; complex error recovery scenarios require custom implementation","No built-in caching or response memoization"],"requires":["MCP server runtime (e.g., Node.js MCP SDK)","Generated MCP tool definitions"],"input_types":["MCP tool definitions (JSON)","API endpoint configuration"],"output_types":["Registered MCP tools","Tool handler functions","Error handling middleware"],"categories":["tool-use-integration","automation-workflow"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"npm_npm-mcp-from-openapi__cap_8","uri":"capability://safety.moderation.openapi.spec.validation.and.compatibility.checking","name":"openapi spec validation and compatibility checking","description":"Validates OpenAPI specifications for completeness and compatibility with MCP tool generation, checking for required fields (operationId, responses), detecting unsupported patterns, and providing warnings about potential conversion issues. Performs pre-flight validation before transpilation to catch spec errors early.","intents":["I want to validate my OpenAPI spec before converting it to MCP tools","I need to identify which parts of my spec may not convert cleanly to MCP","I want warnings about missing or incomplete API documentation"],"best_for":["API teams ensuring their specs are ready for MCP tool generation","CI/CD pipelines validating OpenAPI specs before tool generation","Developers debugging conversion issues by identifying spec problems early"],"limitations":["Validation is limited to structural checks; semantic validation (e.g., endpoint behavior) is not performed","Warnings may be overly conservative, flagging valid patterns as unsupported","No suggestions for fixing validation errors; only reports problems","Does not validate that the spec matches actual API behavior"],"requires":["OpenAPI specification (JSON or YAML)"],"input_types":["OpenAPI specification"],"output_types":["Validation report (JSON)","Warning/error messages","Compatibility assessment"],"categories":["safety-moderation","data-processing-analysis"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"npm_npm-mcp-from-openapi__cap_9","uri":"capability://automation.workflow.incremental.spec.updates.and.tool.regeneration","name":"incremental spec updates and tool regeneration","description":"Supports updating generated MCP tools when the OpenAPI spec changes, detecting which endpoints have been added, modified, or removed and regenerating only affected tools. Maintains tool definitions across updates while preserving custom modifications or metadata.","intents":["I want to update my MCP tools when my API spec changes without regenerating everything","I need to track which tools have changed between spec versions","I want to preserve custom tool modifications while updating from the spec"],"best_for":["Teams with frequently-updated APIs needing to keep MCP tools in sync","CI/CD pipelines that regenerate tools on spec changes","Projects where tool definitions are partially customized and need selective regeneration"],"limitations":["Detecting meaningful changes (vs cosmetic updates) is heuristic-based and may miss or over-report changes","No built-in conflict resolution if custom tool modifications conflict with spec updates","Requires storing previous spec version for diff comparison; no built-in version control","Does not handle breaking changes (e.g., parameter removal) gracefully"],"requires":["Previous OpenAPI spec version for comparison","Tool definition storage mechanism"],"input_types":["Previous OpenAPI spec","Updated OpenAPI spec"],"output_types":["Diff report (added/modified/removed endpoints)","Updated tool definitions","Change summary"],"categories":["automation-workflow","data-processing-analysis"],"confidence":0.5,"matches":0,"success_rate":0}],"trust":{"score":31,"verified":false,"data_access_risk":"high","permissions":["Node.js 16+ or TypeScript 4.5+","Valid OpenAPI 3.0+ specification (JSON or YAML format)","MCP SDK or compatible MCP server runtime","OpenAPI specification with complete operation definitions (operationId recommended)","Node.js 16+ runtime","Sufficient memory for spec parsing (typically <500MB for standard specs)","OpenAPI spec with complete schema definitions","JSON Schema draft 7 or later compatibility","OpenAPI spec with complete response definitions","Responses section in operation definitions"],"failure_modes":["OpenAPI 2.0 (Swagger) support may be limited or require pre-conversion to 3.0 format","Complex discriminator patterns and polymorphic schemas may not fully transpile to MCP constraints","Custom OpenAPI extensions outside standard spec are not preserved in MCP output","No built-in handling for API authentication flows beyond basic header/query parameter mapping","Large OpenAPI specs (>10MB) may cause memory overhead during parsing and transpilation","Duplicate or conflicting endpoint definitions in the spec are not deduplicated automatically","Parameter naming conflicts across endpoints (e.g., same param name with different types) may cause tool naming collisions","No built-in filtering or selective endpoint inclusion — all endpoints are converted","Deeply nested schemas (>5 levels) may be flattened or simplified, losing structural clarity","Schema composition patterns (oneOf, anyOf) are converted to union types which MCP may not fully support","builder identity is not verified yet","no observed match outcomes yet"],"rank_breakdown":{"adoption":0.05,"quality":0.3,"ecosystem":0.6000000000000001,"match_graph":0.25,"freshness":0.6,"weights":{"adoption":0.25,"quality":0.25,"ecosystem":0.15,"match_graph":0.23,"freshness":0.12}},"observed_outcomes":{"matches":0,"success_rate":0,"avg_confidence":0,"top_intents":[],"last_matched_at":null},"maintenance":{"status":"active","updated_at":"2026-05-24T12:16:23.903Z","last_scraped_at":"2026-05-03T14:23:56.597Z","last_commit":null},"community":{"stars":null,"forks":null,"weekly_downloads":null,"model_downloads":null,"model_likes":null}},"distribution":{"claim_url":"https://unfragile.ai/submit?claim=npm-mcp-from-openapi","compare_url":"https://unfragile.ai/compare?artifact=npm-mcp-from-openapi"}},"signature":"53G+CsJbBDEIOzGkrJvf3dHfaW9Mfz3lPCIv/4zLSmM1+hSj5ya+0vbHNEo4mUt2ITx2ETFqc9kZZ1JDn13eBg==","signedAt":"2026-06-20T21:17:26.142Z","signedBy":"unfragile.ai","version":1},"_links":{"self":"https://unfragile.ai/api/v1/passport/npm-mcp-from-openapi","artifact":"https://unfragile.ai/npm-mcp-from-openapi","verify":"https://unfragile.ai/api/v1/verify?slug=npm-mcp-from-openapi","publicKey":"https://unfragile.ai/api/v1/trust-passport-public-key","spec":"https://unfragile.ai/trust","schema":"https://unfragile.ai/schema.json","docs":"https://unfragile.ai/docs"}}