app-kit-dev

App‑Kit builds free web tools and backend infrastructure for developers. It offers a suite of utilities such as image compression, WebP/AVIF conversion, PDF‑to‑image conversion, SEO audit with 400+ checks, text analysis for readability and keyword stuffing, and more. All tools are free, require no sign‑up, and are delivered without watermarks, providing developers with quick, on‑the‑fly processing directly in the browser.

app-kit-dev is profiled on the APIs.io network. Tagged areas include Web Tools, Free, Image Processing, SEO, and Developer Utilities.

app-kit-dev’s developer surface includes engineering blog and 12 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

14.9/100 emerging Agent 18/100 agent aware Full breakdown ↓
scored 2026-10-31 · rubric v0.25.0 · Show this score on your site →

0 APIs

Web ToolsFree Image Processing SEODeveloper Utilities

Kin Score

Kin Score How this is scored →
scored 2026-10-31 · rubric v0.25.0

Composite quality — 14.9/100 · emerging

Contract Quality 0.0 / 21

Developer Ergonomics 0.4 / 17

Access Clarity 3.6 / 17

Operational Transparency 1.7 / 11

Contract Governance 0.0 / 10

Discoverability 4.1 / 9

Regulatory Posture 5.3 / 15

Agent readiness — 18/100 · agent aware

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 12 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 0 / 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 6 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 6 / 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 Energy & Utilities 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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Agent readiness — checks not met, largest first (exact, from this profile):

Machine-Readable Contract +18 pts — api_specs includes an OpenAPI document
Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author
Idempotency +9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented)
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes
Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented)

9 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Contract Quality scores 0.0 — up to +25.0 composite points
Developer Ergonomics scores 2.4 — up to +19.5 composite points
Access Clarity scores 21.1 — up to +15.8 composite points

Each check links to what satisfies it. Publish the artifact, or tell us where it already lives, and the score moves on the next scoring run.

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 the provider profile at artifacts.apis.io/app-kit-dev/apis.yml: open an issue on github.com/api-evangelist/app-kit-dev to ask a question or point us at an artifact you publish. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Security Posture 3

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

App Kit Dev Authentication

0 schemes

SECURITY

App Kit Dev Domain Security

TLSv1.3 · HSTS

SECURITY

App Kit Dev Vulnerability Disclosure

security.txt · contact published

SECURITY

Scopes 1

OAuth scopes governing access to this provider's APIs.

App Kit Dev Scopes

OAuth 2.0 · no documented scopes

0 scopes

SCOPES

Resources

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

WellKnown

WellKnown

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 4

Authentication, authorization, and security posture

Security

Security

SecurityTxt

SecurityTxt

VulnerabilityDisclosure

VulnerabilityDisclosure

DomainSecurity

DomainSecurity

Commercial 2

Pricing, plans, and the legal terms of use

PrivacyPolicy

PrivacyPolicy

TermsOfService

TermsOfService

Company 2

The organization behind the API

Website

Website

Blog

Blog

Other 2

Properties that don't map to a standard resource type

Hosts

Hosts

Team

Team

Source (apis.yml)

aid: app-kit-dev
name: app-kit-dev
description: App‑Kit builds free web tools and backend infrastructure for developers. It offers a suite of utilities such
  as image compression, WebP/AVIF conversion, PDF‑to‑image conversion, SEO audit with 400+ checks, text analysis for readability
  and keyword stuffing, and more. All tools are free, require no sign‑up, and are delivered without watermarks, providing
  developers with quick, on‑the‑fly processing directly in the browser.
url: https://artifacts.apis.io/app-kit-dev/apis.yml
x-type: company
x-source: harvest:mcp-registry
x-tier: profiled
x-tier-reason: enrichment pass 2026-10-30 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-10-30'
modified: '2026-10-30'
x-coverage:
  state: gated
  reason: auth-required
  detail: API documentation and OpenAPI specs are behind a login page requiring authentication.
  evidence:
  - url: https://admin.app-kit.dev/openapi.json
    status: 200
  checked: '2026-10-30'
tags:
- Web Tools
- Free
- Image Processing
- SEO
- Developer Utilities
image: https://app-kit.dev/opengraph-image
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Security
  url: https://app-kit.dev/privacy
- type: LLMsTxt
  url: llms/app-kit-dev-llms.txt
- type: SecurityTxt
  url: well-known/app-kit-dev-security.txt
- type: WellKnown
  url: well-known/app-kit-dev-well-known.yml
- type: Hosts
  url: hosts/app-kit-dev-hosts.yml
- type: GitHubOrganization
  url: https://github.com/app-kit-dev
- type: VulnerabilityDisclosure
  url: security/app-kit-dev-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/app-kit-dev-domain-security.yml
- type: Website
  url: https://app-kit.dev/
- type: Blog
  url: https://app-kit.dev/blog
- type: Team
  url: https://app-kit.dev/team
- type: PrivacyPolicy
  url: https://app-kit.dev/privacy
- type: TermsOfService
  url: https://app-kit.dev/terms
apis: []
x-enrichment:
  date: '2026-10-30'
  status: enriched
  artifacts_added: 24
  pass: modular-v1
  engine: identity=oss,contract=oss,surfaces=oss,docs=oss,regulatory=oss

app-kit-dev API — frequently asked questions

How do I authenticate with the app-kit-dev API?

app-kit-dev documents its authentication (0 schemes). The details are profiled on APIs.io as App Kit Dev Authentication.

Is the app-kit-dev API ready for AI agents?

app-kit-dev has a Kin Score of 14.9 out of 100 (emerging) and an Agent Readiness score of 18.2 (agent-aware), scored by API Evangelist on 2026-10-31.

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