# Vendor facets — Sideko. Generates SDKs, CLIs, docs and mock servers from OpenAPI 3.0/3.1, with
# an automatic docs MCP. The headline: broad pointer lift (SDKs, CLI, docs, a mock-server sandbox),
# but its own docs site is a client-rendered shell (a plain GET returned 11 characters of text on
# 2026-09-25). The CLAUDE.md files it writes into SDKs are not Agent Skills and earn nothing.
vendor: sideko
name: Sideko
website: https://sideko.dev
areas:
- sdk-generation
registry_keys: []
rubric_schema_version: 0.22.0
generated: '2026-09-25'
features_refreshed: '2026-09-25'
basis: capability
summary: >-
  Sideko can lift the SDK pointers (Python, TypeScript, Go, Rust, Java and C# GA, Ruby beta), a CLI, documentation
  and reference pointers, and a sandbox pointer through its mock servers. Each counts only when declared
  in apis.yml. Its docs MCP is one template across customers, so `platform` (0.25). Sideko's own docs
  on the same platform are a JavaScript shell to a plain reader: 11 characters of text before rendering.
  That puts any docs-derived probe on a Sideko site at risk of a false negative. The CLAUDE.md files it
  writes into SDKs are coding-assistant context, not Agent Skills.
features:
- id: sdk-generation
  name: SDK generation
  description: >-
    SDKs from OpenAPI 3.0 or 3.1 for Python, TypeScript, Go, Rust, Java and C# (GA) and Ruby (beta), with
    example snippets and module support.
  source: https://docs.sideko.dev/sdks
  tier: paid
- id: cli-generation
  name: CLI generation
  description: CLI is a GA generation target alongside the SDK languages.
  source: https://docs.sideko.dev/sdks
  tier: paid
- id: docs-platform
  name: Documentation projects
  description: >-
    A deployed docs site per project, with custom pages, generated API references, MDX components, versioning
    and Ask AI.
  source: https://docs.sideko.dev/building-documentation
  tier: paid
- id: mock-servers
  name: Mock servers
  description: Mock servers generated from an API project's OpenAPI.
  source: https://docs.sideko.dev/api-management
  tier: paid
- id: openapi-linting
  name: OpenAPI linting
  description: Linting of uploaded OpenAPI versions within an API project.
  source: https://docs.sideko.dev/api-management
  tier: paid
- id: docs-mcp
  name: Automatic MCP for docs
  description: An MCP server generated automatically for the documentation.
  source: https://sideko.dev/
  tier: paid
- id: llm-assistant-files
  name: LLM coding-assistant files (CLAUDE.md)
  description: >-
    Hybrid codegen writes a CLAUDE.md into Python and TypeScript SDKs, the same file for every coding
    assistant.
  source: https://docs.sideko.dev/sdks/llm-coding-assistant-files
  tier: paid
maps:
- feature: sdk-generation
  check: sdk_count_1
  layer: composite
  provider_must: Publish a generated SDK and declare it as an SDK entry in apis.yml.
  catalog_pass_rate: 0.148
  facet: developer_ergonomics
  points: 3
  baseline_pass_rate: 0.413
- feature: sdk-generation
  check: sdk_count_3
  layer: composite
  provider_must: Publish three or more language SDKs and declare each as its own SDK entry.
  catalog_pass_rate: 0.018
  facet: developer_ergonomics
  points: 4
  baseline_pass_rate: 0.043
- feature: cli-generation
  check: cli_present
  layer: composite
  provider_must: Release the generated CLI and declare it as a CLI entry.
  catalog_pass_rate: 0.063
  facet: developer_ergonomics
  points: 3
  baseline_pass_rate: 0.19
- feature: docs-platform
  check: documentation_present
  layer: composite
  provider_must: Declare the deployed docs site as a Documentation entry.
  note: >-
    Sideko's own docs return an 11-character shell to a plain GET, so any liveness or content probe on
    a Sideko-hosted site may read it as empty.
  catalog_pass_rate: 0.453
  facet: developer_ergonomics
  points: 4
  baseline_pass_rate: 0.95
  saturated: true
  saturated_note: >-
    95% of providers with a contract, docs and a reference already earn this; the vendor cannot move it
    for most of its buyers.
- feature: docs-platform
  check: api_reference_present
  layer: composite
  provider_must: Declare the generated API reference as an APIReference entry.
  catalog_pass_rate: 0.222
  facet: developer_ergonomics
  points: 3
  baseline_pass_rate: 0.942
  saturated: true
  saturated_note: >-
    94% of providers with a contract, docs and a reference already earn this; the vendor cannot move it
    for most of its buyers.
- feature: mock-servers
  check: console_or_sandbox
  layer: composite
  provider_must: Expose the mock server publicly and declare it as a Sandbox entry.
  catalog_pass_rate: 0.089
  facet: developer_ergonomics
  points: 3
  baseline_pass_rate: 0.332
- feature: sdk-generation
  check: openapi_examples
  layer: agent_readiness
  grade: documented
  partial: true
  partial_note: >-
    SDK example snippets are not request/response examples in the contract, so only the Code Samples link
    fallback (0.25) is reached.
  points: 7
  baseline_pass_rate: 0.36
- feature: docs-mcp
  check: mcp_server
  layer: agent_readiness
  grade: platform
  provider_must: Declare the docs MCP in the provider's mcp/ manifest.
  note: >-
    A docs-search server generated automatically for every Sideko docs site is one tool shape across customers,
    which 0.22.0 grades `platform` (0.25). It searches docs; it does not call the API.
  points: 12
  baseline_pass_rate: 0.22
- feature: openapi-linting
  check: operations_description_coverage
  layer: composite
  conditional: true
  condition: The linter reports. The provider has to write the missing descriptions and republish the
    contract.
  catalog_pass_rate: 0.473
  facet: contract_quality
  points: 6
  baseline_pass_rate: 0.643
earns_nothing:
- feature: llm-assistant-files
  check: agent_skill_present
  why: >-
    A CLAUDE.md inside an SDK repo is coding-assistant context, not an Agent Skill, and it is not declared
    on the provider's surface.
- feature: sdk-generation
  check: examples_present
  why: SDK snippets are not request or response examples on the contract's operations.
- feature: sdk-generation
  check: idempotency
  layer: agent_readiness
  why: Generation does not add an idempotency key to the contract.
out_of_reach:
  checks:
  - llms_txt_published
  - agent_skills
  - postman_present
  - overlay_published
  - contract_present
  - status_page_present
  - well_known_published
  note: >-
    No llms.txt, Agent Skill, Postman or overlay output appears on the pages fetched. Terraform and PHP
    are listed as coming soon.
unscored_practice:
- feature: llm-assistant-files
  why: >-
    Coding-assistant context files shipped inside SDKs are a real agent-facing practice that no check
    reads.
surface:
  contract_quality:
    reachable: 6.0
    total: 211
  developer_ergonomics:
    reachable: 20.0
    total: 42
  agent_readiness:
    reachable: 4.8
    total: 139
hard_rule: >-
  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.
method: searched
source:
- https://docs.sideko.dev/api-management
- https://docs.sideko.dev/building-documentation
- https://docs.sideko.dev/sdks
- https://docs.sideko.dev/sdks/llm-coding-assistant-files
- https://sideko.dev/
measured:
  cohort:
    method: vendors-catalog.json detections (CNAME / header / URL shape / markup), never a name match
    detected: 0
    in_baseline: 0
  control:
    basis: providers earning contract_present + documentation_present + api_reference_present, minus the
      cohort
    n: 5216
  metric: >-
    cohort_pct / control_pct = mean share of the check's points earned (derived and platform credit weighted),
    x100
  measured_on: '2026-09-25'
  status: 'not measurable: 0 detected customers clear the baseline (need 20)'
simulation:
  simulated_on: '2026-09-25'
  rubric: 0.23.0
  population: providers publishing a contract (contract_present earned), replayable exactly
  providers: 8977
  providers_unreplayable: 987
  providers_moved: 8957
  conditional_rows: excluded (they depend on what the API already does)
  composite_lift:
    median: 6.2
    p75: 7.6
    p90: 7.8
    max: 9.6
    mean_among_movers: 6.0
  agent_readiness_lift:
    median: 2.2
    p75: 3.4
    p90: 3.5
    max: 4.0
    mean_among_movers: 2.7
  facet_lift_median_among_movers:
    developer_ergonomics: 31.0
  composite_band_moves:
    thin -> developing: 2111
    developing -> strong: 1122
    emerging -> thin: 389
    strong -> exemplar: 308
    minimal -> emerging: 3
  agent_readiness_band_moves:
    agent-aware -> agent-ready: 1006
    agent-ready -> agent-native: 87
  method: >-
    each provider's own kin/checks file, the vendor's maps at their stated credit, the scorer's composite
    formula; from -> to, nothing written