The API workbench for developers

Build APIs without
breaking your flow.

Mandala is a fast, local-first API workspace for developers who spend the day inspecting requests, responses and everything in between.

Download Mandala Explore features

v0.1.0 · macOS · Windows · Linux

GEThttps://api.mandala.dev/users/…/users/{{userId}}Send

Personalusers-crudGet userstaging

Get user

List users

Create user

GEThttps://{{baseUrl}}/users/{{userId}}Send

Params2Headers3AuthBodySettings

KeyValue

includeorders,addresses

page2

per_page50

fieldsid,email,plan

sort-created_at

New keyNew value

200 OK128 ms1.4 kBPrettyRaw

BodyHeaders9Cookies1TimelinePreview

2"id": "usr_8f21c4",

3"email": "[email protected]",

4"active": true,

5"orders": 14,

6"address": {

7"city": "Rosario",

8"country": "AR"

9},

10"plan": "team",

11"roles": [

12"admin",

13"billing"

14],

15"created_at": "2026-02-11T09:14:22Z",

16"updated_at": "2026-09-18T17:02:40Z"

17}

Local2 variables resolvedRAM 214 MB

Request in.
Signal out.

One window holds the whole loop. Compose the request on the left, read the response on the right, and keep both on screen while you iterate — no modal, no round trip through a second app.

RequestParams, headers, auth and body — raw, form, multipart or a file.
AuthBasic, bearer, API key, digest, OAuth 2 client credentials, AWS SigV4.
ResponsePretty or raw body, headers, cookies, preview, and search inside it.
TimelineWaiting (TTFB), download and total, per request.

200 OK128 ms1.4 kBPrettyRaw

BodyHeaders9Cookies1TimelinePreview

2"id": "usr_8f21c4",

3"email": "[email protected]",

4"active": true,

5"orders": 14,

6"address": {

7"city": "Rosario",

8"country": "AR"

9},

10"plan": "team",

11"roles": [

12"admin",

13"billing"

14],

15"created_at": "2026-02-11T09:14:22Z",

16"updated_at": "2026-09-18T17:02:40Z"

17}

Response viewer · JSON, headers, cookies and timings

Built for the request-response loop.

Stay in context

Requests open as tabs in the same workspace. Pin the ones you keep coming back to, duplicate one to try a variant, reopen the one you closed by mistake. Nothing sends you back to a list to find your place again.

Personalusers-crudGet userstaging

Get user

List users

Create user

Your work survives

Every edit is saved half a second after you stop typing. If a save fails, the draft is held in memory and retried on your next keystroke instead of vanishing — and closing a tab with unsaved changes asks first.

500 msdebounce

edit → unsaved → saved

The dirty dot only exists between the edit and the write.

Change the stage, not the setup

Environments carry the values that change between local, staging and production. Variables resolve when the request is sent, secrets live in the OS keyring instead of the database, and TLS verification is set per environment — a single request can still override it.

Personalstaging

GEThttps://{{baseUrl}}/users/{{userId}}Send

Local2 variables resolvedRAM 214 MB

Protocols
HTTP, WebSocket, GraphQL and gRPC in the same sidebar.
Import
Postman, OpenAPI, HAR or a curl command, previewed before it lands.
Copy as code
Turn the request you are looking at into a snippet.
Local by default
History, cookie jar and collection runs stay on the machine.
Collection runs
Run a collection and keep the report.
MCP server
Let a coding agent read your requests and run them, on 127.0.0.1 with a token.

Keep your hands on the keyboard.

Sending, switching and closing are the three things you do hundreds of times a day. They have no animation and no confirmation step — the chord fires and the app is already there.

Send the requestCtrlEnter
Jump to a tab by positionCtrl1…9
Next tabCtrlTab
Previous tabCtrlShiftTab
Close the tabCtrlW
Reopen the last one closedCtrlShiftT

usersorderswebhooksauth

Ctrl + 1jump straight to the tab

Tabs match on the physical key, not the character, so a remapped layout still hits the same slot.

Projects without the ceremony.

A workspace holds projects; a project holds collections, folders and requests, with its own variables and environments. The list tells you what is inside each one and when you last touched it. That is the whole model — there is no board, no status and nothing to fill in.

PersonalNew project

Projects

Every project in this workspace

users-crud

Identity and profile endpoints for the public API.

3 collections28 requests

Today

billing

Invoices, payment intents and webhook replays.

2 collections17 requests

2 days ago

internal-tools

Admin endpoints behind the VPN.

4 collections41 requests

5 days ago

mandala-docs

No description

1 collections6 requests

11 days ago

partner-api

Sandbox credentials for the partner integration.

2 collections12 requests

20 days ago

load-tests

Collections used by the runner.

1 collections9 requests

No activity

LocalRAM 198 MB

Dark when you focus.
Light when you don’t.

The same window, retuned. Three themes ship — light, dim and dark — and contrast is verified against the worst-case backdrop in every one of them, not eyeballed. Syntax colors come from the theme, so JSON reads the same way whichever one you are in.

Personalusers-crudGet userstaging

Get user

List users

Create user

GEThttps://{{baseUrl}}/users/{{userId}}Send

Params2Headers3AuthBodySettings

KeyValue

includeorders,addresses

page2

per_page50

fieldsid,email,plan

sort-created_at

New keyNew value

200 OK128 ms1.4 kBPrettyRaw

BodyHeaders9Cookies1TimelinePreview

2"id": "usr_8f21c4",

3"email": "[email protected]",

4"active": true,

5"orders": 14,

6"address": {

7"city": "Rosario",

8"country": "AR"

9},

10"plan": "team",

11"roles": [

12"admin",

13"billing"

14],

15"created_at": "2026-02-11T09:14:22Z",

16"updated_at": "2026-09-18T17:02:40Z"

17}

Local2 variables resolvedRAM 214 MB

Personalusers-crudGet userstaging

Get user

List users

Create user

GEThttps://{{baseUrl}}/users/{{userId}}Send

Params2Headers3AuthBodySettings

KeyValue

includeorders,addresses

page2

per_page50

fieldsid,email,plan

sort-created_at

New keyNew value

200 OK128 ms1.4 kBPrettyRaw

BodyHeaders9Cookies1TimelinePreview

2"id": "usr_8f21c4",

3"email": "[email protected]",

4"active": true,

5"orders": 14,

6"address": {

7"city": "Rosario",

8"country": "AR"

9},

10"plan": "team",

11"roles": [

12"admin",

13"billing"

14],

15"created_at": "2026-02-11T09:14:22Z",

16"updated_at": "2026-09-18T17:02:40Z"

17}

Local2 variables resolvedRAM 214 MB

Dark · light — scroll reveals the light theme over the dark one

Download Mandala

Choose your platform. Every build is the same app — around 8 MB, no account, no telemetry, and it runs offline.

macOS

Apple Silicon

arm64 · DMG · 7.8 MB

Download for Apple Silicon

Intel

x64 · DMG · 8.3 MB

Download for Intel

Unsigned build: macOS warns on first launch.

Windows

Installer

x64 · EXE · 5.6 MB

Download for Windows

MSI packagex64 · MSI · 7.8 MB

Unsigned build: SmartScreen warns on first launch.

Linux

Debian · Ubuntu

amd64 · DEB · 8.1 MB

Download for Linux

Fedora · RHELx86_64 · RPM · 8.1 MB
Any distroamd64 · AppImage · 85.9 MB

Built on glibc 2.35; older distros need the AppImage.

Mandala v0.1.0 · builds are not code-signed yet, so the first launch shows a warning

Send your next request with Mandala.

GEThttps://api.mandala.dev/users/…/users/{{userId}}Send

Download Mandala

Build APIs without breaking your flow.

Request in.Signal out.

Built for the request-response loop.

Stay in context

Your work survives

Change the stage, not the setup

Keep your hands on the keyboard.

Projects without the ceremony.

Dark when you focus.Light when you don’t.

Download Mandala

macOS

Windows

Linux

Send your next request with Mandala.

Build APIs without
breaking your flow.

Request in.
Signal out.

Dark when you focus.
Light when you don’t.