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Amazon KMS website screenshot

Amazon KMS

AWS Key Management Service (KMS) is a managed service that makes it easy to create and control the cryptographic keys used to protect your data, integrated with other AWS services to simplify encryption of data stored and managed in those services.

agent ready

Reference-quality API operations across every facet — a rich contract, published governance, transparent operations, and machine-readable commercial terms.

Kin Score

API Evangelist profiles Amazon KMS the way a machine reads it — 36 machine-readable artifacts across 2 APIs, pulled from the provider's own public surface and indexed so a developer, an analyst, or an AI agent can evaluate it against every other provider on the network.

Every provider in the network is reduced to the same set of machine-readable artifacts — OpenAPI contracts, event specifications, GraphQL schemas, runnable collections, pricing and rate-limit signals, security posture, OAuth scopes, and the agent surfaces (MCP servers and skills) that let software drive the API on its own. We profile them because the interface is the part of a company you can actually inspect: it is a truer signal of what a provider does than any marketing page. From those artifacts we compute the Kin Score — Amazon KMS scores 75.3/100 (exemplar), with a separate agent-readiness read of 48/100 (agent ready). The full breakdown is below, followed by every artifact we hold — each card links through to its machine-readable definition on apis.io.

Kin Score

This is the API Evangelist rating — a single, repeatable read computed from the artifacts on this page. Green fill is points earned; the red track is points possible, so every bar shows earned-versus-possible at a glance.

Kin Score Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5
Composite quality — 75.3/100 · exemplar
Contract Quality 17.5 / 25
Developer Ergonomics 13.9 / 20
Commercial Clarity 17.4 / 20
Operational Transparency 6.8 / 13
Governance 10.4 / 12
Discoverability 9.3 / 10
Agent readiness — 48/100 · agent ready
Machine-Readable Contract 18 / 18
Agentic Access Contract 15 / 15
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

How we profile Amazon KMS

Each block below is one kind of artifact we hold for Amazon KMS. For each we say what it is and why it earns a place in the profile, then list every one we've indexed — capped at two rows, scroll within the panel for the rest.

APIs 2

Each API is captured as its own OpenAPI definition — every operation, parameter, and response. This is the single most useful machine-readable description of what an API does, and it's what lets us score, lint, mock, and generate against it without asking the provider for anything.

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

Amazon KMS Cryptographic Operations API

Encryption, decryption, and signing operations

Amazon KMS Keys API

KMS cryptographic key management

Postman Collections 1

A runnable collection turns the contract into something a developer can execute in seconds. We profile them because the fastest way to trust an API is to make a real call against it.

Ready-to-run Postman collections for exercising this provider's APIs.

Open Collections 1

Open, tool-agnostic collections carry the same runnable value as Postman without locking you to one client — the portable, forkable form of the same exercise.

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

Amazon KMS API

OPEN COLLECTION

Arazzo Workflows 8

Real integrations are rarely a single call. Arazzo describes the multi-step sequences — auth, then create, then confirm — so both a human and an agent can follow the choreography, not just the endpoints.

Multi-step API workflows described with the Arazzo specification.

Amazon KMS Create Key and Describe

Create a new customer managed KMS key and read back its full metadata.

ARAZZO

Amazon KMS Generate and Recover Data Key

Generate a data key, then decrypt its encrypted form to recover the plaintext key.

ARAZZO

Amazon KMS Disable and Schedule Key Deletion

Disable a KMS key and then schedule it for deletion after a waiting period.

ARAZZO

Amazon KMS Enable Key and Verify State

Enable a disabled KMS key and confirm it is back in the Enabled state.

ARAZZO

Amazon KMS Envelope Encrypt and Decrypt

Generate a data key, then round-trip ciphertext through encrypt and decrypt.

ARAZZO

Amazon KMS List and Describe Keys

List the KMS keys in the account and describe the first one in detail.

ARAZZO

Amazon KMS Provision Key and Encrypt

Create a KMS key, enable it, and immediately encrypt a payload with it.

ARAZZO

Amazon KMS Sign and Verify

Sign a message with an asymmetric KMS key, then verify the signature.

ARAZZO

Scroll within the panel for all 8 ·

Pricing Plans 1

Pricing is part of the interface. Machine-readable plans tell you what a tier costs and includes before you commit — one of the six things the Kin Score reads for commercial clarity.

Published pricing tiers and plan structures.

Rate Limits 1

Rate limits are the difference between a demo that works and a production integration that doesn't fall over. Publishing them is an operational-transparency signal — and a hard requirement for any agent that plans its own throughput.

Documented rate limits and quota policies.

Amazon Kms Rate Limits

5 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals let a buyer model the financial operations of an API before it's live. We profile them for the same reason we profile pricing: the money is part of the contract.

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

Features 6

The notable capabilities this provider advertises, captured as structured features so they can be searched and compared instead of read one landing page at a time.

Notable capabilities this provider offers.

Centralized Key Management

Create, import, rotate, disable, delete, and audit usage of cryptographic keys from a central location.

Hardware Security Modules

Keys are protected by FIPS 140-2 validated hardware security modules (HSMs).

Automatic Key Rotation

Enable automatic annual rotation of KMS keys without changing key ARNs.

Multi-Region Keys

Create multi-Region keys that can be replicated into multiple AWS Regions.

Asymmetric Key Support

Generate and use asymmetric RSA and ECC key pairs for encryption and signing.

CloudTrail Integration

Every KMS API call is logged to AWS CloudTrail for auditing and compliance.

Semantic Vocabularies 1

JSON-LD contexts give the data shared meaning across APIs. We profile them because semantics are what let a machine reconcile 'customer' here with 'customer' somewhere else.

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

Amazon Kms Context

1 classes · 7 properties

JSON-LD

Spectral Rules 2

Governance rulesets we run against this provider's specs — the automated checks behind parts of the score. Profiling them makes the quality bar explicit and re-runnable, not a matter of opinion.

Amazon KMS API Rules

5 rules · 4 warnings

SPECTRAL

Amazon KMS API Rules

24 rules · 9 errors · 15 warnings

SPECTRAL

JSON Schema 1

Standalone JSON Schema definitions describe the data models behind the API. We profile them so the shapes are validatable on their own — useful long after a single request is forgotten.

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

Key

10 properties

JSON SCHEMA

JSON Structure 1

JSON Structure captures the data shapes in a form built for tooling — a complement to JSON Schema that keeps the model machine-legible.

JSON Structure definitions describing this provider's data shapes.

Amazon Kms Key Structure

10 properties

JSON STRUCTURE

Examples 1

Real request and response payloads are what turn a spec from abstract into obvious — and they're one of the twelve things an agent needs to call an API correctly on the first try.

Example request and response payloads for these APIs.

Amazon Kms Key Example

10 fields

EXAMPLE

Security Posture 4

Authentication, domain security, vulnerability disclosure, and trust-center signals — the evidence that a provider takes security seriously enough to document it. We profile it because you can't govern what you can't see.

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

Amazon Kms Authentication

apiKey · 1 scheme

SECURITY

Amazon Kms Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Amazon Kms Vulnerability Disclosure

security.txt · contact published

SECURITY

Amazon Kms Trust Center

PCI DSS, HIPAA, FedRAMP, GDPR, FIPS 140

SECURITY

Agentic Access 1

An x-agentic-access contract marks which operations are safe for an agent to run on its own and which need a human in the loop. It is the difference between an API an agent can use and one it can use safely.

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

Amazon Kms Agentic Access

11 operations · 9 acting · 1 human-in-the-loop

11 operations · 9 acting

AGENTIC

Use Cases 4

What developers actually build with this provider — captured so the catalogue answers 'what is this for', not just 'what does this expose'.

What developers build with this provider.

Data at Rest Encryption

Encrypt data stored in S3, RDS, EBS, and other AWS services using KMS keys.

Envelope Encryption

Use KMS to generate data encryption keys for envelope encryption patterns.

Digital Signatures

Use asymmetric KMS keys to sign and verify digital signatures.

BYOK (Bring Your Own Key)

Import your own cryptographic key material into AWS KMS for compliance requirements.

Resources

Every other property we hold for Amazon KMS — documentation, portals, status pages, policies, and corporate surface — grouped by the job it does, following the integrator's arc from getting started to running in production.

Get Started 4

Portal, sign-up, and the first successful call

Documentation 1

Reference material describing how the API behaves

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

Operate 3

Status, limits, changes, and where to get help

Commercial 3

Pricing, plans, and the legal terms of use

Company 1

The organization behind the API

← All providers · Data indexed from github.com/api-evangelist/amazon-kms · machine-readable index on apis.io