US Department of Defense

The US Department of Defense is responsible for providing the military forces needed to deter war and protect the security of the United States. This includes overseeing the Army, Navy, Marine Corps, and Air Force, as well as coordinating with other defense agencies and organizations. The Department of Defense also plays a critical role in developing military strategies, acquiring and maintaining weapons and equipment, and ensuring the readiness and effectiveness of the armed forces. The DoD's data strategy initiatives have led to the publication of multiple public APIs including the USACE Corps Water Management System API, Lock Performance Monitoring System, and the DoD open data portal.

US Department of Defense publishes 11 API contracts indexed on the APIs.io network, including Catalog API, Levels API, Locations API, and 8 more. Tagged areas include Federal Government, Defense, Military, Water Management, and Waterways.

The US Department of Defense catalog on APIs.io includes 1 JSON-LD context and 2 Spectral governance rulesets.

📡 Profile data on GitHub

26.4/100 thin ▬ flat Agent 23/100 agent aware Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessFreemium

1 published contract

Federal Government Defense Military Water ManagementWaterwaysOpen Data

Kin Score

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

Composite quality — 26.4/100 · thin

Contract Quality 10.5 / 21

Developer Ergonomics 3.2 / 17

Access Clarity 1.3 / 17

Operational Transparency 1.5 / 11

Contract Governance 1.4 / 10

Discoverability 4.9 / 9

Regulatory Posture 1.6 / 15

Agent readiness — 23/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 6 / 6

MCP Server 0 / 12

Machine-Readable Auth 0 / 10

Idempotency 9 / 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

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 Government & Public Sector 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 does not apply to this provider. The published contracts declare no write operations, and a read-only API cannot create-or-update. The facet is excluded from this provider's denominator entirely — not scored zero. A reference or data API is not deficient for being unable to upsert.

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/.

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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
Machine-Readable Auth +10 pts — a served openid-configuration/oauth-authorization-server carrying `issuer` (served), else the securitySchemes class in the provider OpenAPIs — bound (mutualTLS, DPoP, Signature) > negotiable (oauth2 authorizationCode/clientCredentials, openIdConnect) > bearer (http bearer, apiKey)
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document

7 more unmet checks in the Agent Readiness table above.

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

Access Clarity scores 7.9 — up to +18.4 composite points
Developer Ergonomics scores 19.0 — up to +16.2 composite points
Contract Quality scores 49.5 — up to +12.6 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/us-department-of-defense/apis.yml: open an issue on github.com/api-evangelist/us-department-of-defense 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
US Federal API Programs (api.data.gov, Login.gov, GSA MAS, FedRAMP)	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 11

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

USACE Lock Performance Monitoring System API

The USACE Lock Performance Monitoring System (LPMS) API provides data on inland waterway lock operations across the US Army Corps of Engineers lock system. Endpoints return XML ...

DoD Data Portal

The Department of Defense Data Portal features APIs enabling access to DoD open data across military branches, agencies, and programs. The portal surfaces selected APIs from the...

DoD Open Data Platform

The Department of Defense Open Data Platform (data.mil) provides access to unclassified DoD datasets and data services supporting defense research, policy analysis, and public a...

US Department of Defense Catalog API

Data catalog and discovery

US Department of Defense Levels API

Location levels and pool data

US Department of Defense Locations API

CWMS monitoring locations and metadata

US Department of Defense Measurements API

Field measurements and observations

US Department of Defense Offices API

USACE district offices

US Department of Defense Projects API

USACE projects and reservoirs

US Department of Defense Ratings API

Rating curves and tables

US Department of Defense Time Series API

Time series data retrieval and management

Scroll for all 11

Open Collections 9

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

USACE Corps Water Management System Data Catalog API

OPEN COLLECTION

USACE Corps Water Management System Data Catalog Levels API

OPEN COLLECTION

USACE Corps Water Management System Data Catalog Locations API

OPEN COLLECTION

USACE Corps Water Management System Data Catalog Measurements API

OPEN COLLECTION

USACE Corps Water Management System Data Catalog Offices API

OPEN COLLECTION

USACE Corps Water Management System Data Catalog Projects API

OPEN COLLECTION

USACE Corps Water Management System Data Catalog Ratings API

OPEN COLLECTION

USACE Corps Water Management System Data Catalog Time Series API

OPEN COLLECTION

USACE Corps Water Management System Data API

OPEN COLLECTION

Scroll for all 9

US Department of Defense API pricing

Not yet checked against US Department of Defense's own pricing page. Compiled by API Evangelist on 2026-05-04; confirm before you rely on a figure. A free plan or tier is listed.

Plan	Price
Free freemium	Free
Professional paid	Free
Enterprise enterprise	—

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 US Department of Defense's documentation. All 5 limits →

Pricing Plans 1

Published pricing tiers and plan structures.

Us Department Of Defense Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Us Department Of Defense 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.

US Department of Defense

SLA

FinOps 1

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

Us Department Of Defense Finops

FINOPS

Semantic Vocabularies 1

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

Us Department Of Defense Context

22 classes · 2 properties

JSON-LD

Spectral Rules 2

Spectral governance rulesets for linting and validating these APIs.

US Department of Defense — jsonschema rules

5 rules · 3 warnings 2 info

SPECTRAL

US Department of Defense — usace cwms data api rules

10 rules · 2 errors 6 warnings 2 info

SPECTRAL

JSON Schema 1

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

USACE CWMS Time Series Response

10 properties

JSON SCHEMA

JSON Structure 1

JSON Structure definitions describing this provider's data shapes.

Usace Cwms Timeseries Structure

0 properties

JSON STRUCTURE

Examples 1

Example request and response payloads for these APIs.

Usace Cwms Get Timeseries Example

3 fields

EXAMPLE

Security Posture 1

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

Us Department Of Defense Domain Security

TLSv1.3 · HSTS · DNSSEC · DMARC

SECURITY

Agentic Access 1

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

Us Department Of Defense Agentic Access

16 operations

16 operations · 0 acting

AGENTIC

Resources

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

RateLimits

RateLimits

Commercial 2

Pricing, plans, and the legal terms of use

Plans

Plans

FinOps

FinOps

Company 1

The organization behind the API

LinkedIn

Source (apis.yml)

aid: us-department-of-defense
url: https://raw.githubusercontent.com/api-evangelist/us-department-of-defense/refs/heads/main/apis.yml
common:
- type: Plans
  url: plans/us-department-of-defense-plans-pricing.yml
- type: RateLimits
  url: rate-limits/us-department-of-defense-rate-limits.yml
- type: FinOps
  url: finops/us-department-of-defense-finops.yml
- type: AgenticAccess
  url: agentic-access/us-department-of-defense-agentic-access.yml
- type: DomainSecurity
  url: security/us-department-of-defense-domain-security.yml
- type: LinkedIn
  url: https://www.linkedin.com/company/united-states-department-of-defense
apis:
- aid: us-department-of-defense:lpms-api
  name: USACE Lock Performance Monitoring System API
  tags:
  - Waterways
  - Navigation
  - Locks
  - Federal Government
  tags_raw:
  - Waterways
  - Navigation
  - Locks
  - Federal Government
  - Federal-Government
  humanURL: https://corpslocks.usace.army.mil/lpwb/f
  properties:
  - url: https://corpslocks.usace.army.mil/lpwb/f
    type: Documentation
  - url: https://catalog.data.gov/dataset/corps-locks
    type: DataCatalog
  description: The USACE Lock Performance Monitoring System (LPMS) API provides data on inland waterway lock operations across
    the US Army Corps of Engineers lock system. Endpoints return XML data for lock queue reports (past 24 hours), tonnage
    reports, and traffic reports (past 30 days). Tracks vessel traffic through 192 commercially active locks on US inland
    waterways.
- aid: us-department-of-defense:defense-data-gov
  name: DoD Data Portal
  tags:
  - Open Data
  - Defense
  - Federal Government
  tags_raw:
  - Open Data
  - Defense
  - Federal Government
  - Federal-Government
  humanURL: https://data.defense.gov/Featured-API/
  properties:
  - url: https://data.defense.gov/Featured-API/
    type: Documentation
  - url: https://data.defense.gov/
    type: Portal
  description: The Department of Defense Data Portal features APIs enabling access to DoD open data across military branches,
    agencies, and programs. The portal surfaces selected APIs from the DoD's data strategy initiative to make defense data
    more accessible through reusable APIs.
- aid: us-department-of-defense:dod-open-data
  name: DoD Open Data Platform
  tags:
  - Open Data
  - Defense
  - Datasets
  - Federal Government
  tags_raw:
  - Open Data
  - Defense
  - Datasets
  - Federal Government
  - Federal-Government
  humanURL: https://www.data.mil/
  properties:
  - url: https://www.data.mil/
    type: Portal
  description: The Department of Defense Open Data Platform (data.mil) provides access to unclassified DoD datasets and data
    services supporting defense research, policy analysis, and public accountability.
- aid: us-department-of-defense:us-department-of-defense-catalog-api
  name: US Department of Defense Catalog API
  description: Data catalog and discovery
  humanURL: https://cwms-data.usace.army.mil/cwms-data/
  tags:
  - Catalog
  properties:
  - type: OpenAPI
    url: openapi/us-department-of-defense-catalog-api-openapi.yml
  - type: Documentation
    url: https://cwms-data.usace.army.mil/cwms-data/
  - type: SwaggerUI
    url: https://cwms-data.usace.army.mil/cwms-data/swagger-ui.html
  - type: Documentation
    url: https://cwms-data-api.readthedocs.io/latest/
  - type: GitHub
    url: https://github.com/USACE/cwms-data-api
- aid: us-department-of-defense:us-department-of-defense-levels-api
  name: US Department of Defense Levels API
  description: Location levels and pool data
  humanURL: https://cwms-data.usace.army.mil/cwms-data/
  tags:
  - Levels
  properties:
  - type: OpenAPI
    url: openapi/us-department-of-defense-levels-api-openapi.yml
  - type: Documentation
    url: https://cwms-data.usace.army.mil/cwms-data/
  - type: SwaggerUI
    url: https://cwms-data.usace.army.mil/cwms-data/swagger-ui.html
  - type: Documentation
    url: https://cwms-data-api.readthedocs.io/latest/
  - type: GitHub
    url: https://github.com/USACE/cwms-data-api
- aid: us-department-of-defense:us-department-of-defense-locations-api
  name: US Department of Defense Locations API
  description: CWMS monitoring locations and metadata
  humanURL: https://cwms-data.usace.army.mil/cwms-data/
  tags:
  - Location
  tags_raw:
  - Locations
  properties:
  - type: OpenAPI
    url: openapi/us-department-of-defense-locations-api-openapi.yml
  - type: Documentation
    url: https://cwms-data.usace.army.mil/cwms-data/
  - type: SwaggerUI
    url: https://cwms-data.usace.army.mil/cwms-data/swagger-ui.html
  - type: Documentation
    url: https://cwms-data-api.readthedocs.io/latest/
  - type: GitHub
    url: https://github.com/USACE/cwms-data-api
- aid: us-department-of-defense:us-department-of-defense-measurements-api
  name: US Department of Defense Measurements API
  description: Field measurements and observations
  humanURL: https://cwms-data.usace.army.mil/cwms-data/
  tags:
  - Measurements
  properties:
  - type: OpenAPI
    url: openapi/us-department-of-defense-measurements-api-openapi.yml
  - type: Documentation
    url: https://cwms-data.usace.army.mil/cwms-data/
  - type: SwaggerUI
    url: https://cwms-data.usace.army.mil/cwms-data/swagger-ui.html
  - type: Documentation
    url: https://cwms-data-api.readthedocs.io/latest/
  - type: GitHub
    url: https://github.com/USACE/cwms-data-api
- aid: us-department-of-defense:us-department-of-defense-offices-api
  name: US Department of Defense Offices API
  description: USACE district offices
  humanURL: https://cwms-data.usace.army.mil/cwms-data/
  tags:
  - Offices
  properties:
  - type: OpenAPI
    url: openapi/us-department-of-defense-offices-api-openapi.yml
  - type: Documentation
    url: https://cwms-data.usace.army.mil/cwms-data/
  - type: SwaggerUI
    url: https://cwms-data.usace.army.mil/cwms-data/swagger-ui.html
  - type: Documentation
    url: https://cwms-data-api.readthedocs.io/latest/
  - type: GitHub
    url: https://github.com/USACE/cwms-data-api
- aid: us-department-of-defense:us-department-of-defense-projects-api
  name: US Department of Defense Projects API
  description: USACE projects and reservoirs
  humanURL: https://cwms-data.usace.army.mil/cwms-data/
  tags:
  - Project
  tags_raw:
  - Projects
  properties:
  - type: OpenAPI
    url: openapi/us-department-of-defense-projects-api-openapi.yml
  - type: Documentation
    url: https://cwms-data.usace.army.mil/cwms-data/
  - type: SwaggerUI
    url: https://cwms-data.usace.army.mil/cwms-data/swagger-ui.html
  - type: Documentation
    url: https://cwms-data-api.readthedocs.io/latest/
  - type: GitHub
    url: https://github.com/USACE/cwms-data-api
- aid: us-department-of-defense:us-department-of-defense-ratings-api
  name: US Department of Defense Ratings API
  description: Rating curves and tables
  humanURL: https://cwms-data.usace.army.mil/cwms-data/
  tags:
  - Ratings
  properties:
  - type: OpenAPI
    url: openapi/us-department-of-defense-ratings-api-openapi.yml
  - type: Documentation
    url: https://cwms-data.usace.army.mil/cwms-data/
  - type: SwaggerUI
    url: https://cwms-data.usace.army.mil/cwms-data/swagger-ui.html
  - type: Documentation
    url: https://cwms-data-api.readthedocs.io/latest/
  - type: GitHub
    url: https://github.com/USACE/cwms-data-api
- aid: us-department-of-defense:us-department-of-defense-time-series-api
  name: US Department of Defense Time Series API
  description: Time series data retrieval and management
  humanURL: https://cwms-data.usace.army.mil/cwms-data/
  tags:
  - Time Series
  properties:
  - type: OpenAPI
    url: openapi/us-department-of-defense-time-series-api-openapi.yml
  - type: Documentation
    url: https://cwms-data.usace.army.mil/cwms-data/
  - type: SwaggerUI
    url: https://cwms-data.usace.army.mil/cwms-data/swagger-ui.html
  - type: Documentation
    url: https://cwms-data-api.readthedocs.io/latest/
  - type: GitHub
    url: https://github.com/USACE/cwms-data-api
name: US Department of Defense
tags:
- Federal Government
- Defense
- Military
- Water Management
- Waterways
- Open Data
tags_raw:
- Federal Government
- Defense
- Military
- Water Management
- Waterways
- Open Data
- Federal-Government
kind: contract
deliveryModel:
  model: unknown
  license_evidence:
    not_product:
    - usace/cwms-data-api
  open_source: unknown
  commercial: false
  callable_host: true
  label: Delivery model not determined — needs a product licence on record
  confidence: low
  source:
  - openapi
  - repository-not-product
  generated: '2026-09-25'
  method: derived
accessModel:
  pricing: freemium
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Freemium
  confidence: low
  source:
  - plans
  - security
  generated: '2026-11-06'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/us-department-of-defense.png
access: 3rd-Party
created: '2024-12-03'
modified: '2026-05-19'
position: Consuming
description: The US Department of Defense is responsible for providing the military forces needed to deter war and protect
  the security of the United States. This includes overseeing the Army, Navy, Marine Corps, and Air Force, as well as coordinating
  with other defense agencies and organizations. The Department of Defense also plays a critical role in developing military
  strategies, acquiring and maintaining weapons and equipment, and ensuring the readiness and effectiveness of the armed forces.
  The DoD's data strategy initiatives have led to the publication of multiple public APIs including the USACE Corps Water
  Management System API, Lock Performance Monitoring System, and the DoD open data portal.
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
specificationVersion: '0.23'

US Department of Defense API — frequently asked questions

Does US Department of Defense have an API?

Yes. APIs.io lists 11 APIs from US Department of Defense, including USACE Lock Performance Monitoring System API, DoD Data Portal and DoD Open Data Platform, and 8 more.

Is there an OpenAPI specification for the US Department of Defense API?

Yes. APIs.io indexes 8 OpenAPI specifications for US Department of Defense, each linked for download from this page.

How much does the US Department of Defense API cost?

APIs.io lists 3 pricing plans for US Department of Defense, with each plan's price, limits and inclusions under Pricing on this page.

Is the US Department of Defense API ready for AI agents?

US Department of Defense has a Kin Score of 26.4 out of 100 (thin) and an Agent Readiness score of 22.9 (agent-aware), scored by API Evangelist on 2026-11-06.

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