OpenAPI Directory MCP Server
Provides access to the APIs.guru directory of 3,000+ OpenAPI specs and supports custom spec import, enabling API discovery, analysis, and integration via natural language.
Caution. Specific findings reduced this grade. They are listed on the page. Grades reflect the full trust pyramid: code, verification depth, and reputation. New projects cap at C until adoption is earned.
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The grade above is for the source repository. Registries can serve a different version, so we mark the ones we were not able to read.
These names and descriptions are the publisher's own, read from the source code. We print them as written. Our assessment is the findings above, not this list.
get_providersList all API providers in the directory
get_provider_apisList all APIs for a specific provider
get_provider_servicesList all services for a specific provider
get_apiGet detailed information about a specific API
list_all_apisList all APIs in the directory with metadata
get_metricsGet statistics and metrics about the API directory
search_apisSearch for APIs by name, description, provider, or keywords with pagination support
get_popular_apisGet the most popular APIs based on various metrics
get_recently_updatedGet recently updated APIs
get_provider_statsGet statistics for a specific provider
get_openapi_specGet the OpenAPI specification for a specific API
analyze_api_categoriesAnalyze API distribution by categories
get_api_summaryGet basic information about a specific API without endpoint details
get_endpointsGet a paginated list of endpoints for a specific API with minimal information
get_endpoint_detailsGet detailed information about a specific API endpoint
get_endpoint_schemaGet request and response schemas for a specific API endpoint
get_endpoint_examplesGet request and response examples for a specific API endpoint
cache_statsGet cache statistics and information
list_cache_keysList all cache keys
clear_cacheClear all cache entries
clear_cache_keyClear a specific cache key
cache_infoGet cache configuration and settings
Disclosed vulnerabilities in this server's declared npm dependencies (via OSV). Whether each is reachable depends on the installed versions.
Model Context Protocol (MCP) TypeScript SDK does not enable DNS rebinding protection by default
axios Vulnerable to Full Man-in-the-Middle via Prototype Pollution Gadget in `config.proxy`
axios Vulnerable to Credential Theft and Response Hijacking via Prototype Pollution Gadget in Config Merge
Axios is Vulnerable to Denial of Service via __proto__ Key in mergeConfig
Axios is vulnerable to DoS attack through lack of data size check
CACHE_TTLexport =86400000 # Cache TTL in milliseconds (default: 24 hours)DISABLE_CACHEexport =false # Disable caching (default: false)JEST_WORKER_IDLOG_LEVELMCP_DISABLE_LOGGINGOPENAPI_DIRECTORY_CACHE_DIRexport =/custom/cache/pathPRIMARY_API_BASE_URLexport =https://api.apis.guru/v2 # Primary API URLSECONDARY_API_BASE_URLexport =https://api.openapidirectory.com # Secondary API URLTool annotations
No tools have read-only/destructive annotations
Add readOnlyHint or destructiveHint annotations to every tool so hosts can warn users before invoking.
All four hints declared on every tool
22/22 tools missing one or more hints — get_providers (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); get_provider_apis (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); get_provider_services (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint), +19 more. OpenAI's directory rejects tools where any of the four hints are missing or non-boolean.
For every tool, set all four hints (readOnlyHint, destructiveHint, idempotentHint, openWorldHint) to explicit true/false values that match the handler’s actual behaviour.
No eval / new Function
1 eval() or new Function() call — dynamic code execution
Replace eval / Function with explicit parsing or safer alternatives.
Shell command execution
1 child_process call — runs shell commands
Prefer library functions over shell-outs. If you must shell out, ensure all inputs are properly escaped.
Production dependencies are patched
0 critical, 14 high severity in production deps — @modelcontextprotocol/sdk@0.4.0 (high), axios@1.6.0 (high)
Run npm audit fix, or upgrade the affected packages to a non-vulnerable version.
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