Yaak API Client
@YaakApp

Offline, open source, and Git friendly API client for REST, GraphQL, WebSockets, SSE, and gRPC β†’ by @GregorySchier πŸ’«

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yaak.app
Joined March 2023
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New release (2026.1)! πŸ”¬ Debug redirects, headers, cookies & more πŸ€– MCP Server plugin for AI integrations ⌨️ Customizable keyboard shortcuts πŸ”€ Reorderable tabs with persistence 🎨 30+ VSCode themes πŸ”Œ Disable any plugin
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Yaak just crossed $5k MRR. Every feature is MIT licensed and the app runs fully offline. I wasn't sure it would work but here we are... yaak.app/blog/funding-open-s…

Funding MIT Software with Commercial-use Binaries

Yaak earns about $5k MRR from commercial licenses for its binaries. Why I chose this model, how it's working…

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New release (2026.8) πŸ”„ Import into existing workspaces 🧭 JSON response breadcrumbs ✨ Example gRPC messages πŸ”‘ Custom OAuth 2.0 params 🐧 Official Arch Linux package ⚑ More responsive under load
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⚑ More responsive under load A single database writer prevents competing writes from exhausting the pool. Connections: 11 β†’ 4 Slowest write, 30 sends: 98 β†’ 7 ms Slowest write, 100 sends: 375 β†’ 4 ms
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Be sure to check out the full changelog! yaak.app/changelog/2026.8.0

Import Merging, JSON Breadcrumbs, and Better Performance

Merge re-imports into the existing workspace, add custom OAuth 2.0 headers and params, authenticate with HTTP Digest, and install from the official Arch repos

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Yaak API Client retweeted
Catalin
@catalinmpit
Sep 17
I'm happy to see more and more open source alternatives popping up. Docsend β†’ @papermarkio Postman β†’ @YaakApp Wispr Flow β†’ Handy Jira β†’ @planepowers Google Analytics β†’ @OpenPanelDev DocuSign β†’ @documenso Notion β†’ @appflowy Screen Studio β†’ @cap Clerk β†’ @hanko_io GitHub β†’ @giteaio
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New release (2026.7) πŸ”— Import from a URL πŸ•˜ Filter history with pinning πŸ“„ GraphQL schemas from a file πŸ“₯ New OpenAPI importer πŸ”Œ Plugin API for reading response bodies
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πŸ“₯ New OpenAPI importer OpenAPI 3.x and Swagger 2 documents are now parsed directly into Yaak instead of round-tripping through the Postman converter. Large schemas that used to fail on import now work, and the result matches what the spec describes:
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Be sure to check out the full changelog! yaak.app/changelog/2026.7.0

URL Import, Filter History, and GraphQL Schema Files

Import from a URL or drag-and-drop, recall recent response filters, load GraphQL schemas from a file, and a new OpenAPI importer that handles large schemas

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Holy shit WASM 🀯
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πŸ€– A Yaak skill for coding agents The new yaak agent install command writes a Yaak skill into ~/.agents/skills, plus any tool directory it finds (.claude, .cursor, .codex, .opencode). It removes the guesswork around templating, request chaining, and plugin-provided features.
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Be sure to check out the full changelog! yaak.app/changelog/2026.6.0

No Lag at 3,000+ Requests, Base64 Previews, and an Agent Skill

Type without lag in huge workspaces, see base64 as a media preview, pick header names from a dropdown, and teach coding agents to drive Yaak

yaak.app
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New release (2026.6) ⚑ Fast and snappy for huge workspaces πŸ–ΌοΈ Media previews for collapsed values πŸ“‹ Image previews in request bodies πŸ”½ Header name and value dropdowns πŸ€– A Yaak skill for coding agents
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πŸ”½ Header name and value dropdowns Header names and values already autocompleted as you type. Now a chevron on each input opens the same suggestions as a dropdown, so you can pick one without knowing the exact string up front.
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πŸ“‹ Image previews in request bodies Similar to the above, paste an image into a JSON request body and you see PNG Β· 2.7 KB with a thumbnail instead of a wall of characters. The body still sends the full base64, and pasting over the tag replaces it.
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