Stacklet website screenshot

Stacklet

Stacklet is a cloud governance company founded by the creators of Cloud Custodian, the open-source rules engine it stewards. Its Governance-as-Code platform runs Cloud Custodian policies as a managed service across AWS, Azure and GCP and adds AssetDB, a SQL-queryable warehouse of cloud resources, costs, tags and relationships; IaC governance for shift-left policy scanning; and the Jun0 agentic layer. The platform is driven by a per-customer GraphQL API served at https://api..stacklet.io, a first-party Python CLI (stacklet-admin), an official Terraform provider, and an open-source Model Context Protocol server that exposes AssetDB SQL, Platform GraphQL and documentation tools to AI agents. The company operates its marketing surface at stacklet.ai, to which stacklet.io redirects.

Stacklet publishes 2 APIs on the APIs.io network. Tagged areas include Company, Cloud Governance, Cloud Custodian, Policy as Code, and FinOps.

Stacklet’s developer surface includes documentation, engineering blog, support, CLI, authentication, changelog, and 17 more developer resources.

23.9/100 emerging ▬ flat Agent 9/100 agent aware Full breakdown ↓
scored 2026-09-02 · rubric v0.18.0
AccessSelf serve
2 APIs 1 MCP Servers
CompanyCloud GovernanceCloud CustodianPolicy as CodeFinOpsCloud SecurityComplianceInfrastructure as CodeTerraformGraphQLMCPAzureGoogle CloudAgents

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-09-02 · rubric v0.18.0
Regulatory Posture applies to this provider. Its tags matched the Insurance 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.
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/.
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/stacklet: 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 →

APIs 2

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

Stacklet Platform API

The Stacklet Platform GraphQL API is the control plane for the governance platform: cloud accounts and account groups, policies and policy collections, bindings (the deployment ...

Stacklet MCP Server

An open-source Model Context Protocol server, published by Stacklet and distributed on PyPI as stacklet-mcp, that grants an LLM three toolsets against a Stacklet deployment: Ass...

MCP Servers 1

Model Context Protocol servers that expose these APIs to AI agents.

Stacklet MCP Server

Official open-source MCP server published by Stacklet that exposes a Stacklet deployment to an LLM through three toolsets: AssetDB SQL, Platform GraphQL, and deployment document...

MCP SERVER

Pricing Plans 1

Published pricing tiers and plan structures.

Rate Limits 1

Documented rate limits and quota policies.

Stacklet Rate Limits

0 limits

RATE LIMITS

Security Posture 2

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

Stacklet Authentication

3 schemes

SECURITY

Stacklet Domain Security

TLSv1.3 · DMARC

SECURITY

Resources

Documentation 1

Reference material describing how the API behaves

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

Design & Contract 4

Pagination, idempotency, versioning, errors, and events

Build 5

SDKs, sample code, and the tooling you integrate with

Access & Security 2

Authentication, authorization, and security posture

Operate 3

Status, limits, changes, and where to get help

Commercial 3

Pricing, plans, and the legal terms of use

Company 3

The organization behind the API

Source (apis.yml)

apis.yml Raw ↑
aid: stacklet
name: Stacklet
description: Stacklet is a cloud governance company founded by the creators of Cloud Custodian, the open-source rules engine
  it stewards. Its Governance-as-Code platform runs Cloud Custodian policies as a managed service across AWS, Azure and GCP
  and adds AssetDB, a SQL-queryable warehouse of cloud resources, costs, tags and relationships; IaC governance for shift-left
  policy scanning; and the Jun0 agentic layer. The platform is driven by a per-customer GraphQL API served at https://api.<instance>.stacklet.io,
  a first-party Python CLI (stacklet-admin), an official Terraform provider, and an open-source Model Context Protocol server
  that exposes AssetDB SQL, Platform GraphQL and documentation tools to AI agents. The company operates its marketing surface
  at stacklet.ai, to which stacklet.io redirects.
accessModel:
  pricing: unknown
  onboarding: self-serve
  trial: false
  try_now: false
  public: false
  label: Self-serve signup
  confidence: medium
  source:
  - authentication
  - rate-limits
  - security
  generated: '2026-09-02'
  method: derived
image: https://stacklet.ai/wp-content/uploads/2024/09/Social-Share-1.jpg
url: https://raw.githubusercontent.com/api-evangelist/stacklet/refs/heads/main/apis.yml
x-type: company
x-source: harvest:secondary-market
specificationVersion: '0.20'
created: '2026-08-29'
modified: '2026-08-29'
tags:
- Company
- Cloud Governance
- Cloud Custodian
- Policy as Code
- FinOps
- Cloud Security
- Compliance
- Infrastructure as Code
- Terraform
- GraphQL
- MCP
- AWS
- Azure
- Google Cloud
- Agents
tags_raw:
- Company
- Cloud Governance
- Cloud Custodian
- Policy as Code
- FinOps
- Cloud Security
- Compliance
- Infrastructure as Code
- Terraform
- GraphQL
- Model Context Protocol
- AWS
- Azure
- Google Cloud
- Agents
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
apis:
- name: Stacklet Platform API
  description: 'The Stacklet Platform GraphQL API is the control plane for the governance platform: cloud accounts and account
    groups, policies and policy collections, bindings (the deployment of a policy collection against an account group), policy
    repositories, users, SSO groups, roles and role assignments, report groups and notification configuration profiles. It
    is served per customer deployment at https://api.<instance>.stacklet.io/ and is the surface behind the stacklet-admin
    CLI, the official Terraform provider, and the Platform toolset of the Stacklet MCP server. Introspection and the published
    schema require an authenticated deployment, so no anonymous SDL could be captured.'
  humanURL: https://stacklet.ai/platform-overview/
  baseURL: https://api.{instance}.stacklet.io/
  tags:
  - GraphQL
  - Cloud Governance
  - Policy as Code
  properties:
  - type: Authentication
    url: authentication/stacklet-authentication.yml
  - type: Conventions
    url: conventions/stacklet-conventions.yml
  - type: DataModel
    url: data-model/stacklet-data-model.yml
  - type: RateLimits
    url: rate-limits/stacklet-rate-limits.yml
- name: Stacklet MCP Server
  description: 'An open-source Model Context Protocol server, published by Stacklet and distributed on PyPI as stacklet-mcp,
    that grants an LLM three toolsets against a Stacklet deployment: AssetDB SQL queries (ad hoc and saved), Platform GraphQL
    operations with large dataset export, and read access to the deployment documentation. It runs locally over stdio and
    authenticates as the user logged in through the stacklet-admin CLI; write operations (saving queries, archiving queries,
    executing GraphQL mutations) are disabled by default and must be opted into with explicit environment variables.'
  humanURL: https://github.com/stacklet/mcp-server
  baseURL: https://api.{instance}.stacklet.io/
  tags:
  - MCP
  - Agents
  tags_raw:
  - Model Context Protocol
  - Agents
  properties:
  - type: MCPServer
    url: mcp/stacklet-mcp.yml
  - type: SourceCode
    url: https://github.com/stacklet/mcp-server
common:
- type: Website
  url: https://stacklet.ai/
- type: Documentation
  url: https://registry.terraform.io/providers/stacklet/stacklet/latest/docs
- type: Blog
  url: https://stacklet.ai/blog/
- type: BlogRSS
  url: https://stacklet.ai/feed/
- type: Support
  url: https://stacklet.ai/contact/
- type: TermsOfService
  url: https://stacklet.ai/terms-of-service/
- type: PrivacyPolicy
  url: https://stacklet.ai/privacy-policy/
- type: GitHubOrganization
  url: https://github.com/stacklet
- type: SourceCode
  url: https://github.com/stacklet/mcp-server
- type: MCPServer
  url: mcp/stacklet-mcp.yml
- type: Packages
  url: packages/stacklet-packages.yml
- type: SDKs
  url: packages/stacklet-packages.yml
- type: CLI
  url: cli/stacklet-cli.yml
- type: Authentication
  url: authentication/stacklet-authentication.yml
- type: Conventions
  url: conventions/stacklet-conventions.yml
- type: DataModel
  url: data-model/stacklet-data-model.yml
- type: ChangeLog
  url: changelog/stacklet-changelog.yml
- type: Lifecycle
  url: lifecycle/stacklet-lifecycle.yml
- type: Conformance
  url: conformance/stacklet-conformance.yml
- type: LLMsTxt
  url: llms/stacklet-llms.txt
- type: Plans
  url: plans/stacklet-plans-pricing.yml
- type: RateLimits
  url: rate-limits/stacklet-rate-limits.yml
- type: DomainSecurity
  url: security/stacklet-domain-security.yml
x-enrichment:
  date: '2026-08-29'
  status: enriched
  artifacts_added: 14
  pass: local-v1

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