Features

Everything you need to work with APIs the way you work with code.

All Features

Everything Voiden gives you today, from core workflow to AI-agent integrations.

Initialize MCP: Agent-Ready by Default

Beta

One click connects Claude, Codex, or any MCP-capable assistant to the open project over local mcp-stdio, no server to host. It gets list_requests, run_request, write_result, list_environments, and select_environment out of the box, so it can list, run, and record .void requests directly.

MCP Tool Serving & Client Blocks

Beta

Turn any request into your own named, agent-callable tool with /tool, verified and served automatically over MCP. Connect to and test external MCP servers with /mcp.

Stitch: Workflow Runner

Batch-execute multiple .void files sequentially via /stitch. Supports glob patterns, stop-on-failure, variable isolation, configurable delays, and environment selection.

AI Skill: Native .void Understanding

One toggle teaches Claude, Codex, and other AI coding assistants the .void format, block types, and plugin system, so they write valid requests on their own. Pairs with Initialize MCP, which lets that same assistant actually run them.

Multi-Request Support

Multiple requests in a single .void file, separated by visual dividers. Section-scoped execution, color-coded responses, Run All, and stacked response panel.

Multi-Protocol Support

REST, WebSocket, gRPC, and GraphQL: all in one place. Build and test any API type without switching tools.

Multi-Project Management

Open, close, and manage multiple projects seamlessly without breaking a sweat.

Code Block Evolution

Language selection, syntax highlighting, and inline commenting: write code blocks like a pro.

Content-Type Support

Dedicated blocks for XML, YAML, and JSON for structured request and response handling across all data formats.

Advanced Auth Plugin

Basic Auth, Token, OAuth 1.0 & 2.0 support: authenticate like you mean it.

Rich Media Preview

Preview PDFs, images, videos, and audio files directly in response bodies.

Comprehensive Settings

Theme selection, Nerd Font support, proxy config, tiered env variables, TLS toggle, and auto-save.

Voiden Faker Plugin

Generate dynamic test data in requests: no more manually typing fake emails and names.

Enhanced Postman Import

Now supports both v2.0 and v2.1 Postman collections for smoother migrations.

OpenAPI Schema Import

Import OpenAPI specs to auto-generate .void files: migrate your existing APIs in seconds.

Pre & Post Request Scripts

Execute JavaScript, Python, or Shell scripts before sending requests and after receiving responses.

YAML Environment Support

Organize complex environment variables with YAML for cleaner and more efficient configuration management.

Community Extensions

Easily install plugins from ZIP files or the extension registry.

Request History Tracking

Track request history per .void file with configurable retention and the ability to replay previous executions.

What Makes Voiden Different

File-centric. Text-based. Git-native. Capabilities that don't exist in traditional API clients.

Executable API Documentation Inside Markdown

The first tool where runnable API requests, block-level structures, and human-written explanations live side-by-side in the same Markdown file, and the editor can execute them in-place.

Block-Based API Composition (LEGO for HTTP)

Every other API tool treats a request as a monolithic object. Voiden deconstructs requests into composable blocks (endpoint, query, headers, json, auth), independently editable, reusable, and version-controlled as text.

Git-Native API Workflows With Zero Export/Import

No proprietary collections, no export, no sync integrations. Voiden is the first where the native format is Markdown and Git is literally the storage layer.

Unified Model for Design + Testing + Documentation

Design lives in OpenAPI. Testing lives in Postman. Docs live in Confluence. Voiden collapses all three into one unified artifact in the same place.

Everything Is Text: Future-Proof & AI-Friendly

No proprietary workspace. No binary exports. Pure text all the way down: diffable like code, greppable, AI-editable, and merge-friendly.

Markdown-Native, MCP-Native

Because a request is just Markdown, an agent reads and edits it the same way you do. AI Skill teaches Claude, Codex, and other assistants that format natively, and Initialize MCP turns the same file into agent-callable tools instantly: no schema to maintain, no separate integration layer between your API and the agent running it.

Reusable Blocks With Inheritance-Like Behavior

Auth blocks reused across files. Environment blocks defining variables. Header blocks toggled on/off. The first inheritance-like abstraction for API request building.

Programmable Interfaces

Compose your interface however you want. Add only the blocks your API needs, arranged in an order that makes sense for your documentation.

Multi-Format Input Blocks as First-Class Citizens

XML, JSON, text, file attachments, environment variables, multi-body types: all as auto-previewable Markdown block primitives, not UI toggles.

Editor-Neutral, Tool-Neutral API Artifacts

Voiden files open in VS Code, GitHub, CI pipelines, or future tools. There's no 'Voiden workspace': the repo is the workspace.

Ready to Try It?

Download Voiden.md and experience all these features today. We're building in public, and your feedback matters.

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See the full version history on the changelog