SDKs

A curated index of services, tooling, and open source solutions for generating API SDKs, client libraries, and code from API specifications. This collection covers SDK generation platforms, open source code generators, RPC frameworks, and schema-driven toolchains across the SDK lifecycle stop.

SDKs is profiled on the APIs.io network. Tagged areas include API Tooling, Client Libraries, Code Generation, and SDK.

📡 Profile data on GitHub
1.7/100 minimal ▬ flat Agent 0/100 human only Full breakdown ↓
scored 2026-10-23 · rubric v0.25.0 · Show this score on your site →
0 APIs
API ToolingClient LibrariesCode GenerationSDK

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-10-23 · rubric v0.25.0
Composite quality — 1.7/100 · minimal
Contract Quality 0.0 / 21
Developer Ergonomics 0.0 / 17
Access Clarity 0.0 / 17
Operational Transparency 0.0 / 11
Contract Governance 0.0 / 10
Discoverability 3.3 / 9
Regulatory Posture 0.0 / 15
Agent readiness — 0/100 · 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 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 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/.
Show this score on your site. Kin Score badge preview for SDKs It updates itself when the score changes. Paste this where you link to your API docs: 
<a href="https://apis.io/providers/sdk/"><img src="https://apis.io/badge/sdk/card.svg" alt="SDKs on APIs.io — Kin Score by API Evangelist"></a>
Other styles, a README pill and a shields.io endpoint are on the badge page.
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/sdk: 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 →

Source (apis.yml)

apis.yml Raw ↑ 
aid: sdk
name: SDKs
description: A curated index of services, tooling, and open source solutions for generating API SDKs, client libraries, and
  code from API specifications. This collection covers SDK generation platforms, open source code generators, RPC frameworks,
  and schema-driven toolchains across the SDK lifecycle stop.
type: Index
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
tags:
- API Tooling
- Client Libraries
- Code Generation
- SDK
tags_raw:
- API Tooling
- Client Libraries
- Code Generation
- SDKs
url: https://raw.githubusercontent.com/api-evangelist/sdk/refs/heads/main/apis.yml
created: '2026-03-25'
modified: '2026-03-27'
specificationVersion: '0.19'
network:
- name: APIMatic
  url: https://raw.githubusercontent.com/api-evangelist/apimatic/refs/heads/main/apis.yml
- name: Apollo
  url: https://raw.githubusercontent.com/api-evangelist/apollo/refs/heads/main/apis.yml
- name: Apache Thrift
  url: https://raw.githubusercontent.com/api-evangelist/thrift/refs/heads/main/apis.yml
- name: AutoRest
  url: https://raw.githubusercontent.com/api-evangelist/autorest/refs/heads/main/apis.yml
- name: Buf
  url: https://raw.githubusercontent.com/api-evangelist/buf/refs/heads/main/apis.yml
- name: Cap'n Proto
  url: https://raw.githubusercontent.com/api-evangelist/capn-proto/refs/heads/main/apis.yml
- name: Connect-RPC
  url: https://raw.githubusercontent.com/api-evangelist/connect-rpc/refs/heads/main/apis.yml
- name: Feign
  url: https://raw.githubusercontent.com/api-evangelist/feign/refs/heads/main/apis.yml
- name: Fern
  url: https://raw.githubusercontent.com/api-evangelist/fern/refs/heads/main/apis.yml
- name: Genql
  url: https://raw.githubusercontent.com/api-evangelist/genql/refs/heads/main/apis.yml
- name: GraphQL Code Generator
  url: https://raw.githubusercontent.com/api-evangelist/graphql-codegen/refs/heads/main/apis.yml
- name: gRPC
  url: https://raw.githubusercontent.com/api-evangelist/grpc/refs/heads/main/apis.yml
- name: Hey API
  url: https://raw.githubusercontent.com/api-evangelist/hey-api/refs/heads/main/apis.yml
- name: Kiota
  url: https://raw.githubusercontent.com/api-evangelist/kiota/refs/heads/main/apis.yml
- name: Konfig
  url: https://raw.githubusercontent.com/api-evangelist/konfig/refs/heads/main/apis.yml
- name: Liblab
  url: https://raw.githubusercontent.com/api-evangelist/liblab/refs/heads/main/apis.yml
- name: NSwag
  url: https://raw.githubusercontent.com/api-evangelist/nswag/refs/heads/main/apis.yml
- name: oapi-codegen
  url: https://raw.githubusercontent.com/api-evangelist/oapi-codegen/refs/heads/main/apis.yml
- name: Ogen
  url: https://raw.githubusercontent.com/api-evangelist/ogen/refs/heads/main/apis.yml
- name: OpenAPI Generator
  url: https://raw.githubusercontent.com/api-evangelist/openapi-generator/refs/heads/main/apis.yml
- name: OpenAPI TypeScript Codegen
  url: https://raw.githubusercontent.com/api-evangelist/openapi-typescript-codegen/refs/heads/main/apis.yml
- name: Orval
  url: https://raw.githubusercontent.com/api-evangelist/orval/refs/heads/main/apis.yml
- name: Protocol Buffers
  url: https://raw.githubusercontent.com/api-evangelist/protobuf/refs/heads/main/apis.yml
- name: Refitter
  url: https://raw.githubusercontent.com/api-evangelist/refitter/refs/heads/main/apis.yml
- name: Relay Compiler
  url: https://raw.githubusercontent.com/api-evangelist/relay-compiler/refs/heads/main/apis.yml
- name: RestSharp
  url: https://raw.githubusercontent.com/api-evangelist/restsharp/refs/heads/main/apis.yml
- name: Retrofit
  url: https://raw.githubusercontent.com/api-evangelist/retrofit/refs/heads/main/apis.yml
- name: Sideko
  url: https://raw.githubusercontent.com/api-evangelist/sideko/refs/heads/main/apis.yml
- name: Smithy
  url: https://raw.githubusercontent.com/api-evangelist/smithy/refs/heads/main/apis.yml
- name: Speakeasy
  url: https://raw.githubusercontent.com/api-evangelist/speakeasy/refs/heads/main/apis.yml
- name: Stainless
  url: https://raw.githubusercontent.com/api-evangelist/stainless/refs/heads/main/apis.yml
- name: Swagger Codegen
  url: https://raw.githubusercontent.com/api-evangelist/swagger-codegen/refs/heads/main/apis.yml
- name: tRPC
  url: https://raw.githubusercontent.com/api-evangelist/trpc/refs/heads/main/apis.yml
- name: Twirp
  url: https://raw.githubusercontent.com/api-evangelist/twirp/refs/heads/main/apis.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

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Tools for providers

9 MCP tools reach this
  • find_providersBrowse and filter every provider in the catalog.
  • get_provider_artifactsEvery artifact this provider publishes, grouped by type.
  • get_provider_operationsEvery operation across all of their OpenAPIs — one call instead of parsing every spec.
  • get_provider_toolsEvery MCP tool they ship, with the operation each wraps.
  • get_provider_evidenceHow each part of their score was established. Free — the basis for a claim should not sit behind it.
  • get_provider_ratingPRO — composite, band, trend and facet scores.
  • apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
  • resolveTurn a domain, URL or GitHub org into the provider it belongs to.
  • find_cohortsEvery scored population of providers in the catalog.
All 92 tools →

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How their score was established 
curl "https://apis.io/api/v1/providers/sdk/evidence"

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