Insomnia website screenshot

Insomnia

Insomnia is an open-source, cross-platform API development platform by Kong for designing, debugging, and testing HTTP, REST, GraphQL, gRPC, SOAP, WebSockets, SSE, and Socket.IO APIs. It includes an Inso CLI for CI/CD integration, cloud-hosted and self-hosted mock servers, OpenAPI spec design tools, and collaborative features with cloud sync, local vault, and Git storage options.

Insomnia publishes 4 APIs on the APIs.io network, including Mock Logs API, Mock Routes API, Mock Servers API, and 1 more. Tagged areas include API Design, CLI, Clients, Developer Tools, and Mocking.

The Insomnia catalog on APIs.io includes 1 JSON-LD context and 1 Spectral governance ruleset.

Insomnia’s developer surface includes authentication, documentation, changelog, engineering blog, pricing, CLI, and 6 more developer resources.

🌐 Visit website 📡 Source on GitHub
37.2/100 thin ▬ flat Agent 20/100 agent aware Front door AI 5/6 prominent open core · Apache-2.0 Full breakdown ↓
scored 2026-09-25 · rubric v0.23.0
AccessFreemiumSelf serve⚡ Free to try
1 APIs
API DesignCLIClientsDeveloper ToolsMockingPlatformTestingOpenAPI

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-09-25 · rubric v0.23.0
Composite quality — 37.2/100 · thin
Contract Quality 11.7 / 19
Developer Ergonomics 4.7 / 15
Access Clarity 3.9 / 15
Operational Transparency 2.8 / 10
Contract Governance 0.9 / 9
Discoverability 4.3 / 8
Regulatory Posture 2.5 / 15
Create-or-Update Ergonomics 0.0 / 10
Agent readiness — 20/100 · agent aware
Machine-Readable Contract 18 / 18
Agentic Access Contract 10 / 10
Documented Reversibility 0 / 6
MCP Server 0 / 12
Machine-Readable Auth 10 / 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
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 applies to this provider. This API accepts writes, so it carries 10 points of the composite. It is scored from the published contracts themselves: whether a caller can create-or-update in one call, whether the write accepts a key the caller already holds, and whether the response says which branch ran. Without that, every write needs a search-and-branch in front of it, and the first time that check is skipped a duplicate record is created. Scored against the observed mean rather than raw — a provider at the catalog average is unchanged by this facet, not penalised by it.
The six quality facets above are damped to 75 points between them, because the conditional facet above carries the other 25. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 75% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.
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/insomnia: 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 →

What adopting Insomnia moves on the Kin Score 3

Insomnia is an area vendor: providers adopt it to run part of their developer surface. This is the Kin Score checks its features can move for a provider that adopts it, what each one really earns, and what it earns nothing for.

api collectionscapability map6 features checked 2026-09-25 · rubric v0.22.0

Insomnia is a tool a provider’s team works in, not a surface the score reads. A shared Insomnia collection earns nothing: postman_present reads only Postman-typed pointers, and Insomnia exports its own and HAR formats, not Postman’s. It can help a provider that authors its OpenAPI and custom lint rules in Insomnia and publishes them through Git Sync, and a cloud mock can stand in as a sandbox — every one of those is conditional on the provider publishing and declaring the result.

Contract Governance10.0 of 33 pts
Contract Quality20.0 of 211 pts
Developer Ergonomics3.0 of 42 pts
CheckEarnsThrough
Publishes a machine-readable contractsaturated
Contract QualityOnly if the provider authors its OpenAPI in Insomnia and publishes it (Git Sync to a public repo or its own site) — Insomnia is the editor, the contract is the provider’s to publish.		 20.0 of 20 API Collections with a Spec tab
Publishes a rulesetconditional
Contract GovernanceOnly if the team writes custom rules and publishes the ruleset file in a public repository the catalog reads — the built-in linting publishes nothing.		 10.0 of 10 Spec linting with custom rulesets (app and inso lint spec)
Console or sandboxconditional
Developer ErgonomicsOnly if the provider exposes a mock publicly and declares it as Sandbox; the mock returns the sample responses someone typed, not the API’s behavior.		 3.0 of 3 Cloud-hosted and self-hosted mock servers
Across 8977 providers that publish a contract, adopting Insomnia would move 0. Median lift: composite +0.0 (90th percentile +0.0), agent readiness +0.0 (+0.0). Conditional rows excluded.
What Insomnia ships that earns nothing (3)
  • API Collections with a Spec tab — The check reads Postman-typed pointers only. Insomnia exports its own and HAR formats; a shared Insomnia collection is not a Postman collection and declaring it as one would be mislabeling.
  • Inso CLI — Inso is Kong’s CLI for running collections and linting; it is not a command-line client for the provider’s API.
  • MCP clients — Insomnia is an MCP client for testing servers others run; it creates no server for the provider.

A model, not a score. Adopting this vendor changes a provider's Kin Score only when the provider publishes the resulting artifacts on its own surface; nothing here writes a score, and no sponsorship or partnership can. The rating is not for sale → · Full vendor facets artifact

APIs 4

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

Insomnia

Insomnia is an open-source, cross-platform API development platform by Kong for designing, debugging, and testing HTTP, REST, GraphQL, gRPC, SOAP, WebSockets, SSE, and Socket.IO...

Insomnia Mock Logs API

View request logs for mock servers.

Insomnia Mock Routes API

Manage individual routes within a mock server.

Insomnia Mock Servers API

Manage mock server instances.

Open Collections 5

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

API Collection

OPEN COLLECTION

Insomnia Mock Server Mock Logs API

OPEN COLLECTION

Insomnia Mock Server Mock Logs Mock Routes API

OPEN COLLECTION

Insomnia Mock Server API

OPEN COLLECTION

Insomnia Mock Server Mock Logs Mock Servers API

OPEN COLLECTION

Pricing Plans 1

Published pricing tiers and plan structures.

Insomnia Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Insomnia Rate Limits

5 limits

RATE LIMITS

FinOps 1

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

Insomnia Finops

FINOPS

Semantic Vocabularies 1

JSON-LD contexts and semantic vocabularies used across these APIs.

Insomnia Context

2 classes · 5 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Insomnia API Rules

5 rules · 3 warnings 2 info

SPECTRAL

JSON Schema 3

Standalone JSON Schema definitions for this provider's data models.

Insomnia Environment

11 properties

JSON SCHEMA

Insomnia Request

17 properties

JSON SCHEMA

Insomnia Workspace

9 properties

JSON SCHEMA

Security Posture 2

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Insomnia Authentication

http · 1 scheme

SECURITY

Insomnia Domain Security

TLSv1.3 · HSTS · DNSSEC · DMARC

SECURITY

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Insomnia Agentic Access

10 operations · 6 acting

10 operations · 6 acting

AGENTIC

Resources

Documentation 1

Reference material describing how the API behaves

Documentation
Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess
AgenticAccess

Build 3

SDKs, sample code, and the tooling you integrate with

GitHubRepository
GitHubRepository
 Plugins
Plugins
 CLI
CLI

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity
 Authentication
Authentication

Operate 1

Status, limits, changes, and where to get help

ChangeLog
ChangeLog

Commercial 1

Pricing, plans, and the legal terms of use

Pricing
Pricing

Company 2

The organization behind the API

Blog
Blog
 Website
Website

Other 1

Properties that don't map to a standard resource type

VendorFacets
VendorFacets

Source (apis.yml)

apis.yml Raw ↑ 
aid: insomnia
url: https://raw.githubusercontent.com/api-evangelist/insomnia/refs/heads/main/apis.yml
apis:
- aid: insomnia:insomnia
  name: Insomnia
  tags:
  - API Client
  - API Design
  - Debugging
  - Mocking
  - Testing
  tags_raw:
  - API Clients
  - API Design
  - Debugging
  - Mocking
  - Testing
  humanURL: https://insomnia.rest/
  properties:
  - url: https://docs.insomnia.rest/
    type: Documentation
  - url: https://insomnia.rest/plugins
    type: Plugins
  - url: https://docs.insomnia.rest/inso-cli/introduction/
    type: CLI
  - url: https://docs.insomnia.rest/inso-cli/cli-command-reference
    type: CLIReference
  - url: https://docs.insomnia.rest/insomnia/api-mocking/
    type: MockServer
  description: Insomnia is an open-source, cross-platform API development platform by Kong for designing, debugging, and testing
    HTTP, REST, GraphQL, gRPC, SOAP, WebSockets, SSE, and Socket.IO APIs. It includes an Inso CLI for CI/CD integration, cloud-hosted
    and self-hosted mock servers, OpenAPI spec design tools, and collaborative features with cloud sync, local vault, and
    Git storage options.
- aid: insomnia:insomnia-mock-logs-api
  name: Insomnia Mock Logs API
  description: View request logs for mock servers.
  humanURL: https://insomnia.rest/
  tags:
  - Mock Logs
  properties:
  - type: OpenAPI
    url: openapi/insomnia-mock-logs-api-openapi.yml
  - type: Documentation
    url: https://docs.insomnia.rest/insomnia/api-mocking/
  - type: JSONSchema
    url: json-schema/workspace.json
  - type: JSONSchema
    url: json-schema/request.json
  - type: JSONSchema
    url: json-schema/environment.json
  - type: JSONLD
    url: json-ld/insomnia-context.jsonld
- aid: insomnia:insomnia-mock-routes-api
  name: Insomnia Mock Routes API
  description: Manage individual routes within a mock server.
  humanURL: https://insomnia.rest/
  tags:
  - Mock Routes
  properties:
  - type: OpenAPI
    url: openapi/insomnia-mock-routes-api-openapi.yml
  - type: Documentation
    url: https://docs.insomnia.rest/insomnia/api-mocking/
  - type: JSONSchema
    url: json-schema/workspace.json
  - type: JSONSchema
    url: json-schema/request.json
  - type: JSONSchema
    url: json-schema/environment.json
  - type: JSONLD
    url: json-ld/insomnia-context.jsonld
- aid: insomnia:insomnia-mock-servers-api
  name: Insomnia Mock Servers API
  description: Manage mock server instances.
  humanURL: https://insomnia.rest/
  tags:
  - Mock Servers
  properties:
  - type: OpenAPI
    url: openapi/insomnia-mock-servers-api-openapi.yml
  - type: Documentation
    url: https://docs.insomnia.rest/insomnia/api-mocking/
  - type: JSONSchema
    url: json-schema/workspace.json
  - type: JSONSchema
    url: json-schema/request.json
  - type: JSONSchema
    url: json-schema/environment.json
  - type: JSONLD
    url: json-ld/insomnia-context.jsonld
name: Insomnia
tags:
- API Design
- CLI
- Clients
- Developer Tools
- Mocking
- Platform
- Testing
- OpenAPI
type: Index
deliveryModel:
  model: open-core
  license: Apache-2.0
  license_evidence:
    repo: kong/insomnia
    spdx: Apache-2.0
    stars: 40028
  open_source: true
  commercial: true
  callable_host: true
  label: Open core · an OSS project plus a commercial hosted product
  confidence: medium
  source:
  - openapi
  - pricing
  - repository-license
  generated: '2026-09-25'
  method: derived
accessModel:
  pricing: freemium
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  label: Freemium · Self-serve signup
  confidence: medium
  source:
  - plans
  - authentication
  - security
  generated: '2026-09-03'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/insomnia.png
access: 3rd-Party
created: '2025-01-08'
modified: '2026-05-19'
position: Consuming
description: Insomnia is an open-source, cross-platform API development platform by Kong for designing, debugging, and testing
  HTTP, REST, GraphQL, gRPC, SOAP, WebSockets, SSE, and Socket.IO APIs. It includes an Inso CLI for CI/CD integration, cloud-hosted
  and self-hosted mock servers, OpenAPI spec design tools, and collaborative features with cloud sync, local vault, and Git
  storage options.
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
specificationVersion: '0.23'
common:
- type: VendorFacets
  url: vendor-facets/insomnia-vendor-facets.yml
- type: AgenticAccess
  url: agentic-access/insomnia-agentic-access.yml
- type: DomainSecurity
  url: security/insomnia-domain-security.yml
- type: Authentication
  url: authentication/insomnia-authentication.yml
- name: Documentation
  url: https://docs.insomnia.rest/
  type: Documentation
- name: GitHub Repository
  url: https://github.com/Kong/insomnia
  type: GitHubRepository
- name: Plugins
  url: https://insomnia.rest/plugins
  type: Plugins
- name: Changelog
  url: https://insomnia.rest/changelog
  type: ChangeLog
- name: Blog
  url: https://konghq.com/blog
  type: Blog
- name: Pricing
  url: https://insomnia.rest/pricing
  type: Pricing
- name: Inso CLI
  url: https://docs.insomnia.rest/inso-cli/introduction/
  type: CLI
- name: Website
  url: https://insomnia.rest/
  type: Website
x-parent: kong
x-relationship: acquisition
x-acquired: 2019

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