mcp-server
A Rust implementation of the Model Context Protocol (MCP) that can run over HTTP (including SSE streaming) and over STDIO, exposing MCP JSON-RPC methods for resources, tools, prompts, completion, and protocol/session management. Includes configurable authentication/authorization options and TOML-based configuration/validation.
Score Breakdown
⚙ Agent Friendliness
🔒 Security
README claims API key/JWT auth and role-based authorization, plus configurable roots for secure file access and configuration validation. However, the provided content does not confirm TLS-only enforcement, certificate handling, secret storage/logging behavior, or fine-grained scope/permission mapping. CORS defaults in the example enable '*' origins, which is risky if exposed beyond trusted contexts. Dependency hygiene/CVE status cannot be verified from the provided metadata/README excerpt.
⚡ Reliability
Best When
You want a self-hosted MCP server in Rust with both HTTP and STDIO transports for local development or controlled deployments.
Avoid When
You cannot ensure TLS, proper authentication configuration, and safe root/resource restrictions for any filesystem/HTTP resource providers.
Use Cases
- • Integrate an LLM/MCP client with a tool/resource backend using MCP JSON-RPC
- • Run an MCP server for local or hosted use over HTTP with optional SSE streaming
- • Use STDIO transport for subprocess-style MCP interactions
- • Provide file-system/HTTP resources and extensible tool execution to an MCP client
- • Generate prompt templates and support argument completion via MCP methods
Not For
- • Public internet exposure without strong auth/TLS and careful CORS configuration
- • Highly regulated environments where the security model, secret handling, and auditability cannot be verified from published docs alone
- • Use cases requiring a fully managed SaaS offering (this appears to be a self-hosted server binary/library)
Interface
Authentication
README claims API key and JWT support with role-based access control, but does not describe concrete scopes/roles or auth header names/claims structure in the provided content.
Pricing
Self-hosted open-source-style repository (MIT license stated); no pricing info provided.
Agent Metadata
Known Gotchas
- ⚠ HTTP batch vs single request handling is mentioned (POST supports single/batches) but retry/idempotency semantics are not documented; agent should treat tool execution as potentially non-idempotent.
- ⚠ Resource providers include filesystem access and subscriptions per README; agents should be careful to constrain roots/URIs to avoid unintended reads/writes if configured broadly.
- ⚠ CORS is configurable and default example allows '*' origins; ensure it is tightened in real deployments.
- ⚠ Auth configuration is described at a high level; without concrete header/claim details, agents may need trial/error or refer to docs/source for exact expectations.
Alternatives
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Scores are editorial opinions as of 2026-04-04.