{"passport":{"unfragile":{"@version":"1.0","version":"2026-05","artifact":{"id":"awesome-mcp-aggregator","slug":"mcp-aggregator","name":"MCP Aggregator","type":"mcp","url":"https://github.com/nazar256/combine-mcp","page_url":"https://unfragile.ai/mcp-aggregator","categories":["mcp-servers"],"tags":[],"pricing":{"model":"open_source","free":true,"starting_price":null},"status":"active","verified":false},"capabilities":[{"id":"awesome-mcp-aggregator__cap_0","uri":"capability://tool.use.integration.multi.server.mcp.aggregation.with.unified.endpoint","name":"multi-server mcp aggregation with unified endpoint","description":"Implements a proxy pattern that bridges MCP clients to multiple backend MCP servers through a single stdio endpoint. The aggregator launches and manages child processes for each configured backend server, establishes JSON-RPC communication channels with each, and presents all discovered tools through a unified interface. This solves the fundamental limitation of MCP clients like Cursor that can only connect to 2-3 servers simultaneously by multiplexing connections server-side.","intents":["I need to connect my Cursor editor to 5+ MCP servers but it only supports 2-3 connections","I want to consolidate tools from multiple MCP servers into a single endpoint for my AI agent","I need to manage connections to backend MCP servers without modifying client configuration"],"best_for":["developers using Cursor or other MCP clients with connection limits","teams deploying multiple specialized MCP servers that need unified access","AI agent builders requiring access to tools from heterogeneous MCP server ecosystems"],"limitations":["Adds latency per tool invocation due to proxy routing through aggregator process","Backend server failures are not automatically recovered — requires manual restart","No built-in load balancing or failover across multiple aggregator instances","Tool discovery happens at startup — dynamic server addition requires aggregator restart"],"requires":["Go 1.16+ (for building from source)","Multiple MCP servers configured and accessible via stdio or executable paths","JSON configuration file specifying backend server commands and tool allowlists","MCP client supporting stdio-based server connections"],"input_types":["JSON-RPC 2.0 requests from MCP client","Tool invocation requests with parameters"],"output_types":["JSON-RPC 2.0 responses with aggregated tool results","Tool discovery responses listing all available tools from all backends"],"categories":["tool-use-integration","automation-workflow"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"awesome-mcp-aggregator__cap_1","uri":"capability://tool.use.integration.tool.name.conflict.resolution.with.client.compatibility","name":"tool name conflict resolution with client compatibility","description":"Implements a three-layer name management system to handle tool naming conflicts across multiple backend servers while maintaining compatibility with MCP clients like Cursor. Tools are automatically prefixed with server identifiers (e.g., 'shortcut_search_stories'), sanitized by replacing dashes with underscores for Cursor compatibility, and mapped bidirectionally so sanitized names route back to original names for backend invocation. This prevents tool name collisions while preserving backend tool semantics.","intents":["I have multiple MCP servers with tools named 'search' and need to distinguish them in my client","My MCP client doesn't support dashes in tool names but my backend servers use them","I need to automatically prefix tools by server to avoid naming conflicts without manual configuration"],"best_for":["teams aggregating tools from multiple MCP servers with overlapping tool names","Cursor users whose editor doesn't support dashes in tool identifiers","developers needing deterministic, collision-free tool naming across heterogeneous backends"],"limitations":["Prefixing increases tool name length, potentially exceeding client UI display constraints","Tool name mapping is static — changes to backend tool names require aggregator restart","No support for custom naming strategies beyond automatic prefixing and sanitization","Bidirectional mapping adds memory overhead proportional to total number of tools across all servers"],"requires":["Backend MCP servers with discoverable tool schemas","Configuration specifying server identifiers for prefixing","MCP client supporting the sanitized tool names (underscores instead of dashes)"],"input_types":["Tool discovery responses from backend servers","Tool invocation requests using sanitized names"],"output_types":["Prefixed and sanitized tool names in discovery responses","Routed tool invocations to original backend tool names"],"categories":["tool-use-integration","data-processing-analysis"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"awesome-mcp-aggregator__cap_10","uri":"capability://automation.workflow.ci.cd.pipeline.integration.with.automated.testing.and.building","name":"ci/cd pipeline integration with automated testing and building","description":"Includes CI/CD pipeline configuration for automated testing, building, and releasing the MCP aggregator. The pipeline runs tests on code changes, builds binaries for multiple platforms (Linux/Darwin, amd64/arm64), and publishes releases to GitHub. This enables developers to contribute with confidence that changes are tested, and operators to deploy pre-built binaries without building from source. The pipeline is configured via GitHub Actions or similar CI/CD systems.","intents":["I want to automatically test changes to the MCP aggregator before merging","I need pre-built binaries for multiple platforms without building from source","I want to automatically publish releases when code is tagged"],"best_for":["developers contributing to the MCP aggregator project","operators deploying pre-built binaries to production","teams using GitHub for source control and CI/CD"],"limitations":["CI/CD configuration is specific to GitHub Actions — requires adaptation for other CI/CD systems","No support for custom build steps or platform-specific configurations","Release artifacts are published to GitHub only — no integration with container registries"],"requires":["GitHub repository with Actions enabled","Git tags for triggering releases"],"input_types":["Code commits and tags"],"output_types":["Test results","Built binaries for multiple platforms","GitHub releases with artifacts"],"categories":["automation-workflow"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"awesome-mcp-aggregator__cap_2","uri":"capability://tool.use.integration.per.server.tool.filtering.and.allowlisting","name":"per-server tool filtering and allowlisting","description":"Provides configurable allowlists for each backend MCP server to selectively expose only specified tools through the aggregator. Tool filtering is defined in the JSON configuration via 'tools.allowed' arrays per server, enabling fine-grained control over which tools are discoverable and invokable by clients. This allows operators to restrict tool exposure based on security policies, licensing, or organizational requirements without modifying backend servers.","intents":["I want to expose only specific tools from a backend MCP server to my client","I need to prevent certain tools from being accessible due to security or compliance requirements","I want to simplify the tool discovery response by hiding internal or experimental tools"],"best_for":["operators managing multi-tenant access to shared MCP servers","teams enforcing security policies by restricting tool exposure","developers simplifying tool discovery for clients by hiding advanced/internal tools"],"limitations":["Filtering is static — changes to allowlists require aggregator restart","No support for dynamic filtering based on client identity or runtime conditions","Allowlist must be manually maintained as backend tools change","No audit logging of filtered tool access attempts"],"requires":["JSON configuration file with 'tools.allowed' arrays per server","Knowledge of exact tool names from backend servers","Aggregator restart to apply allowlist changes"],"input_types":["JSON configuration specifying tool allowlists","Tool invocation requests from clients"],"output_types":["Filtered tool discovery responses","Rejection of invocations for non-allowlisted tools"],"categories":["tool-use-integration","safety-moderation"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"awesome-mcp-aggregator__cap_3","uri":"capability://automation.workflow.stdio.based.process.orchestration.for.backend.mcp.servers","name":"stdio-based process orchestration for backend mcp servers","description":"Manages the full lifecycle of backend MCP server processes by launching them as child processes, establishing stdio communication channels, and handling JSON-RPC message routing over those channels. The system carefully isolates stdout to prevent backend server logging from corrupting the JSON-RPC protocol stream, implements error handling for process failures, and maintains bidirectional communication with each backend server. This enables the aggregator to transparently invoke tools on remote servers as if they were local.","intents":["I need to launch and manage multiple MCP server processes from a single aggregator instance","I want to route tool invocations to the correct backend server based on tool name prefixes","I need to handle backend server crashes or connection failures gracefully"],"best_for":["operators deploying MCP aggregators in containerized or serverless environments","teams running multiple MCP servers on the same machine with centralized management","developers building MCP-based systems that need reliable inter-process communication"],"limitations":["Backend server failures are not automatically recovered — manual restart required","No built-in health checking or heartbeat mechanism for backend servers","stdio communication adds latency compared to direct in-process tool invocation","Backend server output must be carefully managed to avoid corrupting JSON-RPC streams","No support for non-stdio MCP server transports (HTTP, WebSocket, etc.)"],"requires":["Backend MCP servers that support stdio-based communication","Executable paths or commands for launching backend servers","Go runtime for the aggregator process","Proper signal handling for graceful shutdown"],"input_types":["Executable paths and command-line arguments for backend servers","JSON-RPC 2.0 messages from MCP clients"],"output_types":["Launched backend server processes","JSON-RPC 2.0 responses routed from backend servers"],"categories":["automation-workflow","tool-use-integration"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"awesome-mcp-aggregator__cap_4","uri":"capability://tool.use.integration.mcp.protocol.version.control.and.client.compatibility.mode","name":"mcp protocol version control and client compatibility mode","description":"Supports forcing specific MCP protocol versions via the 'MCP_PROTOCOL_VERSION' environment variable and includes Cursor-specific adjustments configurable via 'MCP_CURSOR_MODE'. This allows the aggregator to adapt its protocol behavior to match client expectations, ensuring compatibility with different MCP client implementations that may have varying protocol support or quirks. The system can present different protocol versions to clients while maintaining compatibility with backend servers.","intents":["I need to force a specific MCP protocol version for compatibility with my client","I'm using Cursor and need special handling for its MCP protocol implementation","I want to test my aggregator against different MCP protocol versions"],"best_for":["developers integrating with MCP clients that have specific protocol version requirements","Cursor users experiencing protocol compatibility issues","teams testing MCP aggregator compatibility across protocol versions"],"limitations":["Protocol version forcing is global — cannot vary per client connection","Cursor-specific adjustments are undocumented and may change with Cursor updates","No automatic protocol negotiation — requires manual environment variable configuration","Limited visibility into which protocol features are actually affected by version forcing"],"requires":["Environment variable configuration (MCP_PROTOCOL_VERSION, MCP_CURSOR_MODE)","Knowledge of which protocol version your MCP client supports","Aggregator restart to apply protocol version changes"],"input_types":["Environment variables specifying protocol version and client mode"],"output_types":["MCP protocol responses conforming to specified version"],"categories":["tool-use-integration","automation-workflow"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"awesome-mcp-aggregator__cap_5","uri":"capability://automation.workflow.json.configuration.driven.server.and.tool.management","name":"json configuration-driven server and tool management","description":"Uses a declarative JSON configuration file to specify all backend MCP servers, their launch commands, tool allowlists, and aggregator behavior. The configuration system parses server definitions, tool filtering rules, and environment variables from a single config file, enabling operators to manage the entire aggregator topology without code changes. Configuration is loaded at startup and applied to all subsequent tool discovery and invocation operations.","intents":["I want to configure multiple MCP servers and their tool allowlists in a single file","I need to change which servers are connected without recompiling the aggregator","I want to version control my MCP server configuration alongside my application"],"best_for":["operators managing MCP aggregator deployments across multiple environments","teams using infrastructure-as-code practices for MCP server management","developers prototyping MCP aggregator configurations without code changes"],"limitations":["Configuration changes require aggregator restart — no hot-reload support","No schema validation or helpful error messages for malformed configurations","No support for configuration inheritance or templating across multiple files","Tool allowlists must be manually maintained as backend tools change"],"requires":["Valid JSON configuration file with server definitions","Knowledge of backend server executable paths and command-line arguments","File system access to read configuration at aggregator startup"],"input_types":["JSON configuration file specifying servers, commands, and tool allowlists"],"output_types":["Parsed server configurations applied to aggregator behavior"],"categories":["automation-workflow","data-processing-analysis"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"awesome-mcp-aggregator__cap_6","uri":"capability://tool.use.integration.automatic.tool.discovery.from.backend.mcp.servers","name":"automatic tool discovery from backend mcp servers","description":"Automatically discovers available tools from each connected backend MCP server by querying their tool schemas at startup. The discovery process retrieves tool names, descriptions, input schemas, and other metadata from each backend, aggregates them with server-based prefixes and name sanitization, and presents the unified tool set to clients. This eliminates the need for manual tool registration or configuration while maintaining accurate tool metadata for client-side tool selection and parameter validation.","intents":["I want to automatically discover all tools from my backend MCP servers without manual configuration","I need accurate tool schemas and descriptions for client-side parameter validation","I want to see all available tools from all servers in a single discovery response"],"best_for":["developers building MCP aggregators that need to support dynamic backend server additions","teams deploying MCP servers without maintaining separate tool registries","AI agents that need accurate tool schemas for parameter validation and planning"],"limitations":["Tool discovery happens only at aggregator startup — new tools on backends require restart","No incremental discovery — all tools from all servers are discovered even if only one server changes","Tool schema changes on backends are not reflected until aggregator restart","Discovery latency scales linearly with number of backend servers and tools"],"requires":["Backend MCP servers that support tool discovery via MCP protocol","Aggregator startup to trigger initial tool discovery","Network/process connectivity to all configured backend servers"],"input_types":["Tool discovery requests to backend MCP servers"],"output_types":["Aggregated tool schemas with server prefixes and sanitized names","Tool metadata including descriptions, input schemas, and parameters"],"categories":["tool-use-integration","data-processing-analysis"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"awesome-mcp-aggregator__cap_7","uri":"capability://tool.use.integration.tool.invocation.routing.with.backend.server.mapping","name":"tool invocation routing with backend server mapping","description":"Routes tool invocation requests from clients to the correct backend MCP server based on tool name prefixes and the bidirectional name mapping. When a client invokes a tool with a sanitized name (e.g., 'shortcut_search_stories'), the aggregator maps it back to the original tool name, identifies the source backend server from the prefix, and forwards the invocation to that backend. The aggregator then returns the tool result to the client, transparently handling the routing and name translation.","intents":["I need to invoke tools from multiple backend servers through a single aggregator endpoint","I want the aggregator to automatically route tool invocations to the correct backend based on tool names","I need tool results from backend servers to be returned to my client transparently"],"best_for":["developers building MCP agents that invoke tools from multiple backend servers","teams deploying aggregators that need transparent tool invocation routing","AI systems that need to select and invoke tools from a unified tool set"],"limitations":["Tool invocation latency includes aggregator routing overhead plus backend execution time","No built-in retry logic for failed tool invocations — failures are returned immediately to client","Tool result streaming is not supported — entire result must be buffered before returning","No caching of tool results across multiple invocations"],"requires":["Tool name mapping established during tool discovery","Backend MCP servers running and accessible via stdio","Client providing tool invocation requests with sanitized tool names"],"input_types":["Tool invocation requests with sanitized tool names and parameters","Tool execution results from backend servers"],"output_types":["Tool execution results returned to client","Error responses for invalid tool names or backend failures"],"categories":["tool-use-integration","automation-workflow"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"awesome-mcp-aggregator__cap_8","uri":"capability://automation.workflow.structured.logging.system.for.debugging.and.monitoring","name":"structured logging system for debugging and monitoring","description":"Provides a logging system for tracking aggregator operations, backend server communications, tool discovery, and tool invocations. Logs capture JSON-RPC message exchanges, process lifecycle events, configuration loading, and error conditions, enabling operators to debug issues and monitor aggregator behavior. The logging system is configurable and can be directed to files or stdout for integration with log aggregation systems.","intents":["I need to debug why a tool invocation is failing through the aggregator","I want to monitor which tools are being invoked and their results","I need to troubleshoot backend server connection issues"],"best_for":["operators debugging MCP aggregator deployments","teams monitoring tool invocation patterns and performance","developers troubleshooting backend server connectivity issues"],"limitations":["Logging verbosity is global — cannot vary per backend server or tool","No built-in log rotation or size management","Sensitive data in tool parameters may be logged without redaction","Log output format is not configurable — limited to built-in format"],"requires":["File system access for writing logs (if file-based logging)","Log aggregation system for centralized log collection (optional)"],"input_types":["Aggregator operations and events"],"output_types":["Structured log entries with timestamps and event details"],"categories":["automation-workflow","safety-moderation"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"awesome-mcp-aggregator__cap_9","uri":"capability://automation.workflow.docker.containerization.and.deployment.support","name":"docker containerization and deployment support","description":"Provides Docker support for containerized deployment of the MCP aggregator, including Dockerfile for building container images and Docker Compose examples for orchestrating aggregator instances with backend MCP servers. The containerization approach enables easy deployment across different environments while maintaining consistent configuration and dependencies. Container images can be built from source or pulled from registries, and environment variables can be passed to configure aggregator behavior.","intents":["I want to deploy the MCP aggregator in a Docker container alongside my backend servers","I need to orchestrate multiple MCP servers and the aggregator using Docker Compose","I want to deploy the aggregator to Kubernetes or other container orchestration platforms"],"best_for":["teams deploying MCP aggregators in containerized environments","developers using Docker Compose for local MCP server development","operators deploying to Kubernetes or other container orchestration platforms"],"limitations":["Container images must be rebuilt to apply configuration changes","No official container image registry — requires building from source","Docker Compose examples are basic — may require customization for production use","Container networking must be properly configured for backend server communication"],"requires":["Docker runtime installed","Docker Compose (optional, for orchestration examples)","Dockerfile or pre-built container image"],"input_types":["Dockerfile and Docker Compose configuration"],"output_types":["Docker container image","Running aggregator container"],"categories":["automation-workflow"],"confidence":0.5,"matches":0,"success_rate":0}],"trust":{"score":31,"verified":false,"data_access_risk":"high","permissions":["Go 1.16+ (for building from source)","Multiple MCP servers configured and accessible via stdio or executable paths","JSON configuration file specifying backend server commands and tool allowlists","MCP client supporting stdio-based server connections","Backend MCP servers with discoverable tool schemas","Configuration specifying server identifiers for prefixing","MCP client supporting the sanitized tool names (underscores instead of dashes)","GitHub repository with Actions enabled","Git tags for triggering releases","JSON configuration file with 'tools.allowed' arrays per server"],"failure_modes":["Adds latency per tool invocation due to proxy routing through aggregator process","Backend server failures are not automatically recovered — requires manual restart","No built-in load balancing or failover across multiple aggregator instances","Tool discovery happens at startup — dynamic server addition requires aggregator restart","Prefixing increases tool name length, potentially exceeding client UI display constraints","Tool name mapping is static — changes to backend tool names require aggregator restart","No support for custom naming strategies beyond automatic prefixing and sanitization","Bidirectional mapping adds memory overhead proportional to total number of tools across all servers","CI/CD configuration is specific to GitHub Actions — requires adaptation for other CI/CD systems","No support for custom build steps or platform-specific configurations","builder identity is not verified yet","no observed match outcomes yet"],"rank_breakdown":{"adoption":0.05,"quality":0.47,"ecosystem":0.39999999999999997,"match_graph":0.25,"freshness":0.52,"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":"2026-06-17T09:51:03.578Z","last_scraped_at":"2026-05-03T14:00:15.503Z","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=mcp-aggregator","compare_url":"https://unfragile.ai/compare?artifact=mcp-aggregator"}},"signature":"nl9eRVVMAtEoGoutgjdDg1nxMHhCNJMjLonC484i7OnRRZs8LPznUbVfAoJvU/7IhZHy7I+8sxUfORdo7OoFDg==","signedAt":"2026-06-22T06:37:52.777Z","signedBy":"unfragile.ai","version":1},"_links":{"self":"https://unfragile.ai/api/v1/passport/mcp-aggregator","artifact":"https://unfragile.ai/mcp-aggregator","verify":"https://unfragile.ai/api/v1/verify?slug=mcp-aggregator","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"}}