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MCP development tools compared

Tooling for developing and shipping MCP servers, compared on focus, source, and setup.

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FieldMCP Inspector

Official visual testing and debugging tool for Model Context Protocol servers.

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Smithery

MCP server discovery and deployment platform for finding, installing, and running model context protocol tools.

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Speakeasy

OpenAPI-native platform and CLI for generating type-safe SDKs, CLIs, Terraform providers, contract tests, and standalone MCP servers.

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Notes Safety Privacy Safety · Privacy · Safety Privacy
Categorytoolstoolstools
Sourcesource-backedsource-backedsource-backed
AuthorModel Context ProtocolSmitherySpeakeasy
Added2026-06-022026-04-272026-06-03
Platforms
CLI
CLI
CLI
Source repo
Safety notesStarts a local inspector UI and proxy process for interactive MCP debugging. Only connect it to MCP servers and endpoints you trust during testing.— missingGenerated SDKs, CLIs, Terraform providers, and MCP servers can expose every operation described by an API contract unless the source spec and generation config are scoped deliberately. Standalone MCP servers generated from an OpenAPI document can turn API operations into agent-callable tools, so write, delete, billing, admin, and production operations need review, auth, and environment separation. Treat generated code like source code and review diffs, dependency changes, auth handling, retries, timeouts, pagination, and error behavior before publishing or wiring into agents.
Privacy notesRequests and tool responses from the inspected server may be visible in the local inspector session. Avoid testing with production credentials or private user data unless the environment is isolated.— missingHosted Speakeasy workflows may receive API contracts, endpoint paths, schemas, examples, auth scheme metadata, server URLs, and generated artifact configuration. Internal or pre-release OpenAPI documents can reveal private routes, customer-facing object models, operational controls, and service topology. Generated MCP servers, SDK telemetry hooks, CI logs, contract test output, and published documentation can expose request or response examples if specs are not scrubbed first.
Prerequisites
  • A local or remote MCP server to inspect.
  • Node.js and npm/npx available in the development environment.
— none listed
  • Reviewed OpenAPI 3.x, Swagger, or JSON Schema source for the API being published to agents or developers.
  • Speakeasy account and CLI authentication for hosted generation workflows.
  • Release process for generated SDKs, CLIs, Terraform providers, MCP servers, contract tests, and any generated package publishing.
Install
npx @modelcontextprotocol/inspector node build/index.js
Config
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