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.

Amazon KMS publishes 8 API contracts indexed on the APIs.io network, including Cryptographic Operations API, Keys API, Kms Alias API, and 5 more. Tagged areas include Amazon Web Services, Cryptography, Data Protection, Encryption, and Key Management.

The Amazon KMS catalog on APIs.io includes 1 JSON-LD context and 2 Spectral governance rulesets.

Amazon KMS’s developer surface includes authentication, engineering blog, support, developer console, CLI, developer portal, documentation, and 30 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

70.2/100 exemplar ▬ flat Agent 35/100 agent ready saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessPaid

1 published contract 6 Features 4 Use Cases

Amazon Web Services Cryptography Data Protection Encryption Key Management Security

What this lets a business do 1

Business capabilities this provider's published APIs can perform, derived from its own contracts. Browse all capabilities →

Cybersecurity Management

BC-620

Cryptographic OperationsKeysamazon-kms-custom-key-store-apiamazon-kms-grant-apiamazon-kms-key-policy-apiamazon-kms-key-rotation-api

POST /keys/{KeyId}/encrypt POST /decrypt POST /keys/{KeyId}/sign POST /keys/{KeyId}/verify

Kin Score

Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0

Composite quality — 70.2/100 · exemplar

Contract Quality 12.4 / 19

Developer Ergonomics 12.0 / 15

Access Clarity 15.0 / 15

Operational Transparency 3.6 / 10

Contract Governance 2.5 / 9

Discoverability 5.5 / 8

Regulatory Posture 5.3 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 35/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 6 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 7 / 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

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 4 / 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

MCP Tool Quality 6 / 6

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 applies to this provider. This API accepts writes, so it carries 10 points of the composite. It is scored from the published contracts themselves: whether a caller can create-or-update in one call, whether the write accepts a key the caller already holds, and whether the response says which branch ran. Without that, every write needs a search-and-branch in front of it, and the first time that check is skipped a duplicate record is created. Scored against the observed mean rather than raw — a provider at the catalog average is unchanged by this facet, not penalised by it.

The six quality facets above are damped to 75 points between them, because the conditional facet above carries the other 25. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 75% 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):

MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship
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
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document
Delegated User Identity +6 pts — a served discovery document listing authorization_code in grant_types_supported (served), else an oauth2 authorizationCode flow or openIdConnect declared in an OpenAPI (documented)
Typed Event Surface +6 pts — AsyncAPI document, OR webhooks/callbacks objects in the as-published OpenAPI, OR common[].type includes Webhooks

5 more unmet checks in the Agent Readiness table above.

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

Contract Governance scores 27.3 — up to +8.7 composite points
Contract Quality scores 66.2 — up to +8.5 composite points
Operational Transparency scores 36.8 — up to +8.2 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/amazon-kms/apis.yml: open an issue on github.com/api-evangelist/amazon-kms 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 →

Markets this provider is in provisional

The Kin Score Market layer reads a provider inside its market: its position, and how deep its integrations go. Depth is only comparable within a position. Provisional and unweighted: not part of the Kin Score or agent readiness.

Market	Position	Depth	Registered MCP server	Declares compatibility
PKI and Encryption (certificate authorities, key management)	undeclared	-	-	-
Cloud Security Attestation and Secure-by-Design	undeclared	-	-	-
Common Criteria Certified Products (ISO/IEC 15408, NIAP Product Compliant List)	undeclared	-	-	-

Registered MCP server and declares compatibility are report only — not weighted. Undeclared means we found nothing we can read, so there is no number: we never infer integrations.

Standards implemented 1

Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.

OpenAPI

measured — observed by APIs.io (published)

APIs 8

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

Amazon KMS Kms Alias API

The Kms Alias API from Amazon KMS — 3 operation(s) for kms alias.

Amazon KMS Kms Custom Key Store API

The Kms Custom Key Store API from Amazon KMS — 6 operation(s) for kms custom key store.

Amazon KMS Kms Grant API

The Kms Grant API from Amazon KMS — 4 operation(s) for kms grant.

Amazon KMS Kms Key Policy API

The Kms Key Policy API from Amazon KMS — 3 operation(s) for kms key policy.

Amazon KMS Kms Key Rotation API

The Kms Key Rotation API from Amazon KMS — 3 operation(s) for kms key rotation.

Amazon KMS Kms Operations API

The Kms Operations API from Amazon KMS — 21 operation(s) for kms operations.

Scroll for all 8

Postman Collections 1

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

Amazon KMS API

POSTMAN

Open Collections 3

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

Amazon KMS Cryptographic Operations API

OPEN COLLECTION

Amazon KMS Cryptographic Operations Keys API

OPEN COLLECTION

Amazon KMS API

OPEN COLLECTION

Arazzo Workflows 8

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 for all 8

Amazon KMS API pricing

Prices published by Amazon KMS, read 2026-10-28 from aws.amazon.com/kms/pricing/.

Plan	Price
Key storage (KMS key)	$1/month per KMS key (prorated hourly) Includes: Same price for symmetric, asymmetric, HMAC, multi-Region, imported key material, CloudHSM or externa
Key usage (API requests)	$0.03/ 10,000 requests per 10,000 requests Includes: Free tier of 20,000 requests/month across all Regions
Signing requests (ECC 256 example)	$0.15 per 10,000 requests
CloudHSM instance (pricing example)	$1.60/ HSM/ hour per HSM per hour

Plan details, limits and sources →

Rate limits

Free Tier Default: 10 requests per minute
Free Tier Monthly Quota: 1000 requests per month
Professional Tier Default: 100 requests per minute

Compiled by API Evangelist, not yet checked against Amazon KMS's documentation. All 5 limits →

Billed by: 10,000 requests · FinOps profile →

Pricing Plans 2

Published pricing tiers and plan structures.

Amazon Kms Plans Pricing

4 plans

PLANS

Amazon Kms Price Estimates

0 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Amazon Kms Rate Limits

5 limits

RATE LIMITS

Service Levels 1

Uptime the provider promises or reports, as SLA4OAI. Read from its own pages; APIs.io runs no monitors.

Amazon KMS

SLA

FinOps 1

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

Amazon Kms Finops

FINOPS

Features 6

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 and semantic vocabularies used across these APIs.

Amazon Kms Context

1 classes · 7 properties

JSON-LD

Spectral Rules 2

Spectral governance rulesets for linting and validating these APIs.

Amazon KMS — jsonschema rules

5 rules · 4 warnings 1 info

SPECTRAL

Amazon KMS API Rules

24 rules · 9 errors 15 warnings

SPECTRAL

JSON Schema 1

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

Key

10 properties

JSON SCHEMA

JSON Structure 1

JSON Structure definitions describing this provider's data shapes.

Amazon Kms Key Structure

10 properties

JSON STRUCTURE

Examples 1

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.

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

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 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

Get Started 4

Portal, sign-up, and the first successful call

Console

Portal

GettingStarted

Signup

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

Design & Contract 10

Pagination, idempotency, versioning, errors, and events

Arazzo

Arazzo

Arazzo

Arazzo

Arazzo

Arazzo

Arazzo

Arazzo

SpectralRules

Vocabulary

Scroll for all 10

Build 4

SDKs, sample code, and the tooling you integrate with

PostmanWorkspace

PostmanWorkspace

CLI

CLI

SDKs

SDKs

GitHubOrganization

GitHubOrganization

Access & Security 5

Authentication, authorization, and security posture

TrustCenter

TrustCenter

VulnerabilityDisclosure

VulnerabilityDisclosure

DomainSecurity

DomainSecurity

Authentication

Authentication

Compliance

Compliance

Operate 4

Status, limits, changes, and where to get help

RateLimits

Support

StatusPage

FAQ

Commercial 5

Pricing, plans, and the legal terms of use

Plans

FinOps

TermsOfService

Pricing

PrivacyPolicy

Company 2

The organization behind the API

Website

Website

Blog

Blog

Other 1

Properties that don't map to a standard resource type

CapabilityMap

CapabilityMap

Source (apis.yml)

name: Amazon KMS
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: high
  source:
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
specificationVersion: '0.23'
segments:
- Security
- Encryption
description: 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.
url: https://aws.amazon.com/kms/
type: Index
accessModel:
  pricing: paid
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Paid
  confidence: medium
  source:
  - plans
  - authentication
  - security
  generated: '2026-11-06'
  method: derived
image: https://a0.awsstatic.com/libra-css/images/logos/aws_logo_smile_1200x630.png
tags:
- Amazon Web Services
- Cryptography
- Data Protection
- Encryption
- Key Management
- Security
tags_raw:
- AWS
- Cryptography
- Data Protection
- Encryption
- Key Management
- Security
created: '2024-01-15'
modified: '2026-09-16'
apis:
- aid: amazon-kms:amazon-kms-cryptographic-operations-api
  name: Amazon KMS Cryptographic Operations API
  description: Encryption, decryption, and signing operations
  humanURL: https://aws.amazon.com/kms/
  baseURL: https://kms.amazonaws.com
  tags:
  - Cryptographic Operations
  properties:
  - type: OpenAPI
    url: openapi/amazon-kms-cryptographic-operations-api-openapi.yml
  - type: Documentation
    url: https://docs.aws.amazon.com/kms/latest/developerguide/overview.html
  - type: Pricing
    url: https://aws.amazon.com/kms/pricing/
  - type: GettingStarted
    url: https://aws.amazon.com/kms/getting-started/
  - type: FAQ
    url: https://aws.amazon.com/kms/faqs/
  - type: Features
    url: https://aws.amazon.com/kms/features/
  - type: APIReference
    url: https://docs.aws.amazon.com/kms/latest/APIReference/Welcome.html
  - type: JSONLD
    url: json-ld/amazon-kms-context.jsonld
  - type: JSONSchema
    url: json-schema/amazon-kms-key-schema.json
- aid: amazon-kms:amazon-kms-keys-api
  name: Amazon KMS Keys API
  description: KMS cryptographic key management
  humanURL: https://aws.amazon.com/kms/
  baseURL: https://kms.amazonaws.com
  tags:
  - Keys
  properties:
  - type: OpenAPI
    url: openapi/amazon-kms-keys-api-openapi.yml
  - type: Documentation
    url: https://docs.aws.amazon.com/kms/latest/developerguide/overview.html
  - type: Pricing
    url: https://aws.amazon.com/kms/pricing/
  - type: GettingStarted
    url: https://aws.amazon.com/kms/getting-started/
  - type: FAQ
    url: https://aws.amazon.com/kms/faqs/
  - type: Features
    url: https://aws.amazon.com/kms/features/
  - type: APIReference
    url: https://docs.aws.amazon.com/kms/latest/APIReference/Welcome.html
  - type: JSONLD
    url: json-ld/amazon-kms-context.jsonld
  - type: JSONSchema
    url: json-schema/amazon-kms-key-schema.json
- aid: amazon-kms:amazon-kms-alias-api
  name: Amazon KMS Kms Alias API
  description: The Kms Alias API from Amazon KMS — 3 operation(s) for kms alias.
  humanURL: https://aws.amazon.com/kms/
  baseURL: https://kms.amazonaws.com
  tags:
  - Kms Alias
  properties:
  - type: OpenAPI
    url: openapi/amazon-kms-alias-api-openapi.yml
- aid: amazon-kms:amazon-kms-custom-key-store-api
  name: Amazon KMS Kms Custom Key Store API
  description: The Kms Custom Key Store API from Amazon KMS — 6 operation(s) for kms custom key store.
  humanURL: https://aws.amazon.com/kms/
  baseURL: https://kms.amazonaws.com
  tags:
  - Kms Custom Key Store
  properties:
  - type: OpenAPI
    url: openapi/amazon-kms-custom-key-store-api-openapi.yml
- aid: amazon-kms:amazon-kms-grant-api
  name: Amazon KMS Kms Grant API
  description: The Kms Grant API from Amazon KMS — 4 operation(s) for kms grant.
  humanURL: https://aws.amazon.com/kms/
  baseURL: https://kms.amazonaws.com
  tags:
  - Kms Grant
  properties:
  - type: OpenAPI
    url: openapi/amazon-kms-grant-api-openapi.yml
- aid: amazon-kms:amazon-kms-key-policy-api
  name: Amazon KMS Kms Key Policy API
  description: The Kms Key Policy API from Amazon KMS — 3 operation(s) for kms key policy.
  humanURL: https://aws.amazon.com/kms/
  baseURL: https://kms.amazonaws.com
  tags:
  - Kms Key Policy
  properties:
  - type: OpenAPI
    url: openapi/amazon-kms-key-policy-api-openapi.yml
- aid: amazon-kms:amazon-kms-key-rotation-api
  name: Amazon KMS Kms Key Rotation API
  description: The Kms Key Rotation API from Amazon KMS — 3 operation(s) for kms key rotation.
  humanURL: https://aws.amazon.com/kms/
  baseURL: https://kms.amazonaws.com
  tags:
  - Kms Key Rotation
  properties:
  - type: OpenAPI
    url: openapi/amazon-kms-key-rotation-api-openapi.yml
- aid: amazon-kms:amazon-kms-operations-api
  name: Amazon KMS Kms Operations API
  description: The Kms Operations API from Amazon KMS — 21 operation(s) for kms operations.
  humanURL: https://aws.amazon.com/kms/
  baseURL: https://kms.amazonaws.com
  tags:
  - Kms Operations
  properties:
  - type: OpenAPI
    url: openapi/amazon-kms-operations-api-openapi.yml
common:
- type: Plans
  url: plans/amazon-kms-plans-pricing.yml
- type: RateLimits
  url: rate-limits/amazon-kms-rate-limits.yml
- type: FinOps
  url: finops/amazon-kms-finops.yml
- type: CapabilityMap
  url: capabilities/amazon-kms-capability-edges.yml
  name: Amazon KMS Business Capability Map
- type: Website
  url: https://aws.amazon.com/kms/
- type: AgenticAccess
  url: agentic-access/amazon-kms-agentic-access.yml
- type: TrustCenter
  url: security/amazon-kms-trust-center.yml
- type: VulnerabilityDisclosure
  url: security/amazon-kms-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/amazon-kms-domain-security.yml
- type: Authentication
  url: authentication/amazon-kms-authentication.yml
- type: PostmanWorkspace
  url: https://www.postman.com/kinlaneapi/amazon-kms/overview
- type: Arazzo
  url: arazzo/amazon-kms-create-key-and-describe-workflow.yml
  name: Amazon KMS Create Key and Describe
- type: Arazzo
  url: arazzo/amazon-kms-data-key-generate-and-decrypt-workflow.yml
  name: Amazon KMS Generate and Recover Data Key
- type: Arazzo
  url: arazzo/amazon-kms-disable-and-schedule-deletion-workflow.yml
  name: Amazon KMS Disable and Schedule Key Deletion
- type: Arazzo
  url: arazzo/amazon-kms-enable-key-and-verify-state-workflow.yml
  name: Amazon KMS Enable Key and Verify State
- type: Arazzo
  url: arazzo/amazon-kms-envelope-encrypt-decrypt-workflow.yml
  name: Amazon KMS Envelope Encrypt and Decrypt
- type: Arazzo
  url: arazzo/amazon-kms-list-and-describe-keys-workflow.yml
  name: Amazon KMS List and Describe Keys
- type: Arazzo
  url: arazzo/amazon-kms-provision-key-and-encrypt-workflow.yml
  name: Amazon KMS Provision Key and Encrypt
- type: Arazzo
  url: arazzo/amazon-kms-sign-and-verify-workflow.yml
  name: Amazon KMS Sign and Verify
- type: Blog
  url: https://aws.amazon.com/blogs/security/category/security-identity-compliance/aws-key-management-service/
- type: Support
  url: https://aws.amazon.com/premiumsupport/
- type: Console
  url: https://console.aws.amazon.com/kms/home
- type: CLI
  url: https://docs.aws.amazon.com/cli/latest/reference/kms/
- type: SDKs
  url: https://aws.amazon.com/tools/
- type: StatusPage
  url: https://status.aws.amazon.com/
- type: Compliance
  url: https://aws.amazon.com/compliance/
- type: TermsOfService
  url: https://aws.amazon.com/service-terms/
- type: Portal
  url: https://aws.amazon.com/kms/
- type: Documentation
  url: https://docs.aws.amazon.com/kms/
- type: Pricing
  url: https://aws.amazon.com/kms/pricing/
- type: GettingStarted
  url: https://aws.amazon.com/kms/getting-started/
- type: FAQ
  url: https://aws.amazon.com/kms/faqs/
- type: PrivacyPolicy
  url: https://aws.amazon.com/privacy/
- type: Signup
  url: https://portal.aws.amazon.com/billing/signup
- type: GitHubOrganization
  url: https://github.com/aws
- type: Features
  data:
  - name: Centralized Key Management
    description: Create, import, rotate, disable, delete, and audit usage of cryptographic keys from a central location.
  - name: Hardware Security Modules
    description: Keys are protected by FIPS 140-2 validated hardware security modules (HSMs).
  - name: Automatic Key Rotation
    description: Enable automatic annual rotation of KMS keys without changing key ARNs.
  - name: Multi-Region Keys
    description: Create multi-Region keys that can be replicated into multiple AWS Regions.
  - name: Asymmetric Key Support
    description: Generate and use asymmetric RSA and ECC key pairs for encryption and signing.
  - name: CloudTrail Integration
    description: Every KMS API call is logged to AWS CloudTrail for auditing and compliance.
- type: UseCases
  data:
  - name: Data at Rest Encryption
    description: Encrypt data stored in S3, RDS, EBS, and other AWS services using KMS keys.
  - name: Envelope Encryption
    description: Use KMS to generate data encryption keys for envelope encryption patterns.
  - name: Digital Signatures
    description: Use asymmetric KMS keys to sign and verify digital signatures.
  - name: BYOK (Bring Your Own Key)
    description: Import your own cryptographic key material into AWS KMS for compliance requirements.
- type: Integrations
  data:
  - name: Amazon S3
    description: Encrypt S3 objects at rest using SSE-KMS with customer managed keys.
  - name: Amazon RDS
    description: Encrypt RDS database instances and automated backups with KMS keys.
  - name: AWS CloudTrail
    description: All KMS API usage is automatically logged for audit and compliance.
  - name: AWS Secrets Manager
    description: Encrypt secrets stored in Secrets Manager with KMS keys.
  - name: AWS Lambda
    description: Encrypt Lambda environment variables with KMS customer managed keys.
- type: SpectralRules
  url: rules/amazon-kms-spectral-rules.yml
- type: Vocabulary
  url: vocabulary/amazon-kms-vocabulary.yaml
- type: Integrations
  url: https://aws.amazon.com/marketplace
integrations:
- name: Sign in
- name: Agent Mode
- name: Why AWS Marketplace?
- name: Get started in AWS Marketplace
- name: Industry
- name: Resources
- name: Become a Channel Partner
- name: Sell in AWS Marketplace
- name: Manage Your Account
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
  url: https://apievangelist.com
include: []
x-parent: amazon-web-services
x-relationship: product

Amazon KMS API — frequently asked questions

Does Amazon KMS have an API?

Yes. APIs.io lists 8 APIs from Amazon KMS, including Amazon KMS Cryptographic Operations API, Amazon KMS Keys API and Amazon KMS Kms Alias API, and 5 more.

Is there an OpenAPI specification for the Amazon KMS API?

Yes. APIs.io indexes 8 OpenAPI specifications for Amazon KMS, each linked for download from this page.

How do I authenticate with the Amazon KMS API?

Amazon KMS uses bearer-token authentication (apiKey · 1 scheme). The details are profiled on APIs.io as Amazon Kms Authentication.

How much does the Amazon KMS API cost?

Amazon KMS publishes its prices; its Key storage (KMS key) plan is $1/month per KMS key (prorated hourly) as of 2026-10-28. APIs.io lists 4 pricing plans for Amazon KMS, with each plan's price, limits and inclusions under Pricing on this page.

Is the Amazon KMS API ready for AI agents?

Amazon KMS has a Kin Score of 70.2 out of 100 (exemplar) and an Agent Readiness score of 34.7 (agent-ready), scored by API Evangelist on 2026-11-06.

Work with this as data

Every provider here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

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 →

Call it yourself

curl for this page

This provider

curl "https://apis.io/api/v1/providers/amazon-kms"

All providers

curl "https://apis.io/api/v1/providers?limit=25"

Every operation they expose

curl "https://apis.io/api/v1/providers/amazon-kms/operations?limit=25"

How their score was established

curl "https://apis.io/api/v1/providers/amazon-kms/evidence"

Calls without X-API-Key need no key. Calls with it need a paid plan — get a key.

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A second provider on the same verified email joins the account you already have.