Milkman

Milkman is an open-source, JavaFx-based, plugin-driven request/response workbench and desktop alternative to Postman and Insomnia. It supports multiple protocols including HTTP/REST, GraphQL, gRPC (with server reflection and streaming), WebSocket, Socket.IO, JDBC/SQL, Cassandra CQL, and Model Context Protocol (MCP).

Milkman is listed with 1 API on the APIs.io network. Tagged areas include API Client, Cassandra, Desktop Application, GraphQL, and gRPC.

Milkman’s developer surface includes documentation, release notes, and 8 more developer resources.

📡 Profile data on GitHub

12.7/100 emerging ▬ flat Agent 1/100 human only Full breakdown ↓
scored 2026-10-23 · rubric v0.25.0 · Show this score on your site →

AccessFreemium

1 API

API Client Cassandra Desktop Application GraphQL gRPC HTTP Client JDBC MCP Open Source Socket.IO WebSocket

Kin Score

Kin Score How this is scored →
scored 2026-10-23 · rubric v0.25.0

Composite quality — 12.7/100 · emerging

Contract Quality 0.0 / 21

Developer Ergonomics 3.6 / 17

Access Clarity 1.3 / 17

Operational Transparency 2.9 / 11

Contract Governance 0.0 / 10

Discoverability 4.9 / 9

Regulatory Posture 0.0 / 15

Agent readiness — 1/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 0 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Pagination 5 / 5

Distinct Operations 3 / 3

Regulatory Posture applies to this provider. Its tags matched the Horizontal (data, software, accessibility, platform) regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.

Create-or-Update Ergonomics could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.

The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

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Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from github.com/api-evangelist/milkman: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Markets this provider is in provisional

The Kin Score Market layer reads a provider inside its market: its position, and how deep its integrations go. Depth is only comparable within a position. Provisional and unweighted: not part of the Kin Score or agent readiness.

Market	Position	Depth	Registered MCP server	Declares compatibility
Buf Schema Registry (public Protocol Buffers modules, gRPC / ConnectRPC schema publishers)	undeclared	-	-	-

Registered MCP server and declares compatibility are report only — not weighted. Undeclared means we found nothing we can read, so there is no number: we never infer integrations.

Standards implemented 4

Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.

GraphQL

tagged — the provider's own APIs.json carries the standard as a tag; implementation not verified

gRPC

tagged — the provider's own APIs.json carries the standard as a tag; implementation not verified

JDBC

tagged — the provider's own APIs.json carries the standard as a tag; implementation not verified

WebSockets

tagged — the provider's own APIs.json carries the standard as a tag; implementation not verified

APIs 1

Individual APIs this provider publishes, each with its own machine-readable definition.

Milkman

Milkman is an extensible request/response workbench for various protocols like HTTP, gRPC, GraphQL, WebSocket, Socket.IO, JDBC/SQL, Cassandra, and MCP. The plugin-based desktop ...

Pricing Plans 1

Published pricing tiers and plan structures.

Milkman Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Milkman Rate Limits

5 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals for API financial operations.

Milkman Finops

FINOPS

Resources

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Operate 3

Status, limits, changes, and where to get help

RateLimits

RateLimits

ReleaseNotes

ReleaseNotes

Issues

Issues

Commercial 3

Pricing, plans, and the legal terms of use

Plans

Plans

FinOps

FinOps

License

License

Company 2

The organization behind the API

LinkedIn

Website

Website

Source (apis.yml)

aid: milkman
name: Milkman
description: Milkman is an open-source, JavaFx-based, plugin-driven request/response workbench and desktop alternative to
  Postman and Insomnia. It supports multiple protocols including HTTP/REST, GraphQL, gRPC (with server reflection and streaming),
  WebSocket, Socket.IO, JDBC/SQL, Cassandra CQL, and Model Context Protocol (MCP).
type: Index
deliveryModel:
  model: unknown
  open_source: false
  commercial: false
  callable_host: false
  label: Delivery model not determined — needs a product licence on record
  confidence: low
  source:
  - none
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: freemium
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Freemium
  confidence: medium
  source:
  - plans
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/milkman.png
tags:
- API Client
- Cassandra
- Desktop Application
- GraphQL
- gRPC
- HTTP Client
- JDBC
- MCP
- Open Source
- Socket.IO
- WebSocket
tags_raw:
- API Client
- Cassandra
- Desktop Application
- GraphQL
- gRPC
- HTTP Client
- JDBC
- MCP
- Open Source
- Socket.IO
- WebSocket
- Open-Source
url: https://raw.githubusercontent.com/api-evangelist/milkman/refs/heads/main/apis.yml
created: '2026-03-27'
modified: '2026-04-28'
specificationVersion: '0.23'
apis:
- aid: milkman:milkman
  name: Milkman
  description: Milkman is an extensible request/response workbench for various protocols like HTTP, gRPC, GraphQL, WebSocket,
    Socket.IO, JDBC/SQL, Cassandra, and MCP. The plugin-based desktop application supports workspaces, environments, collections,
    OAuth, Postman/Insomnia import, Git-based team sync, a CLI for terminal usage, and a test runner for sequential request
    execution.
  humanURL: https://github.com/warmuuh/milkman
  tags:
  - API Client
  - Desktop Application
  - HTTP Client
  - Plugin Architecture
  properties:
  - type: Documentation
    url: https://github.com/warmuuh/milkman#readme
  - type: GettingStarted
    url: https://github.com/warmuuh/milkman#getting-started
  - type: Source Code
    url: https://github.com/warmuuh/milkman
  - type: ReleaseNotes
    url: https://github.com/warmuuh/milkman/releases
  - type: Issues
    url: https://github.com/warmuuh/milkman/issues
  - type: Plugins
    url: https://github.com/warmuuh/milkman/wiki
common:
- type: Plans
  url: plans/milkman-plans-pricing.yml
- type: RateLimits
  url: rate-limits/milkman-rate-limits.yml
- type: FinOps
  url: finops/milkman-finops.yml
- type: LinkedIn
  url: https://www.linkedin.com/company/milkmantechnologies
- type: Website
  url: https://github.com/warmuuh/milkman
- type: Documentation
  url: https://github.com/warmuuh/milkman#readme
- type: GitHubOrganization
  url: https://github.com/warmuuh/milkman
- type: ReleaseNotes
  url: https://github.com/warmuuh/milkman/releases
- type: Issues
  url: https://github.com/warmuuh/milkman/issues
- type: License
  url: https://github.com/warmuuh/milkman/blob/master/LICENSE
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

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