United States Army Corps of Engineers

The U.S. Army Corps of Engineers (USACE) provides engineering and construction services for the nation, managing water resources, infrastructure, and environmental projects. USACE operates the Corps Water Management System (CWMS) Data API, a RESTful service for accessing real-time and historical water management data including time series measurements, location information, ratings, forecasts, and project data for USACE-managed water resources across the United States.

United States Army Corps of Engineers publishes 10 APIs on the APIs.io network, including Basins API, Catalog API, Forecasts API, and 7 more. Tagged areas include Engineering, Federal-Government, Water Resources, Hydrology, and Civil Engineering.

The United States Army Corps of Engineers catalog on APIs.io includes 1 JSON-LD context and 2 Spectral governance rulesets.

United States Army Corps of Engineers’ developer surface includes authentication, GitHub presence, and 10 more developer resources.

🌐 Visit website 📡 Source on GitHub

38.7/100 thin ▬ flat Agent 29/100 agent aware Full breakdown ↓
scored 2026-08-20 · rubric v0.12.0

AccessFreemiumSelf serve⚡ Free to try

10 APIs

Engineering Federal-Government Water Resources Hydrology Civil Engineering

Kin Score

Kin Score How this is scored →
scored 2026-08-20 · rubric v0.12.0

Composite quality — 38.7/100 · thin

Contract Quality 13.6 / 21

Developer Ergonomics 2.0 / 17

Access Clarity 2.7 / 17

Operational Transparency 1.5 / 11

Contract Governance 5.6 / 10

Discoverability 6.3 / 9

Regulatory Posture 4.7 / 15

Agent readiness — 29/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

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

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

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.

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/. This rating is computed from github.com/api-evangelist/united-states-army-corps-of-engineers: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 10

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

Open Collections 12

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

Rate Limits 1

Documented rate limits and quota policies.

United States Army Corps Of Engineers Rate Limits

5 limits

RATE LIMITS

FinOps 1

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

JSON Schema 2

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

Examples 3

Example request and response payloads for these APIs.

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

Build 2

SDKs, sample code, and the tooling you integrate with

DigitalLibrary

DigitalLibrary

GitHub

GitHub

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

Commercial 1

Pricing, plans, and the legal terms of use

License

License

Company 2

The organization behind the API

LinkedIn

Website

Website

Other 4

Properties that don't map to a standard resource type

OpenData

GeospatialData

WaterData

PermitsData

Source (apis.yml)

aid: united-states-army-corps-of-engineers
name: United States Army Corps of Engineers
description: The U.S. Army Corps of Engineers (USACE) provides engineering and construction services for the nation, managing
  water resources, infrastructure, and environmental projects. USACE operates the Corps Water Management System (CWMS) Data
  API, a RESTful service for accessing real-time and historical water management data including time series measurements,
  location information, ratings, forecasts, and project data for USACE-managed water resources across the United States.
accessModel:
  pricing: freemium
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  label: Freemium · Self-serve signup
  confidence: high
  source:
  - plans
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/united-states-army-corps-of-engineers.png
url: https://raw.githubusercontent.com/api-evangelist/united-states-army-corps-of-engineers/refs/heads/main/apis.yml
type: Index
created: '2024-12-25'
modified: '2026-05-19'
specificationVersion: '0.23'
tags:
- Engineering
- Federal-Government
- Water Resources
- Hydrology
- Civil Engineering
tags_raw:
- Engineering
- Federal Government
- Water Resources
- Hydrology
- Civil Engineering
apis:
- aid: united-states-army-corps-of-engineers:united-states-army-corps-of-engineers-basins-api
  name: United States Army Corps of Engineers Basins API
  description: River basin information
  humanURL: https://cwms-data.usace.army.mil/cwms-data/
  baseURL: https://cwms-data.usace.army.mil/cwms-data
  tags:
  - Basins
  properties:
  - type: OpenAPI
    url: openapi/united-states-army-corps-of-engineers-basins-api-openapi.yml
  - type: Documentation
    url: https://cwms-data.usace.army.mil/cwms-data/
  - type: GitHubRepository
    url: https://github.com/USACE/cwms-data-api
  - type: SwaggerUI
    url: https://cwms-data.usace.army.mil/cwms-data/swagger-ui.html
- aid: united-states-army-corps-of-engineers:united-states-army-corps-of-engineers-catalog-api
  name: United States Army Corps of Engineers Catalog API
  description: Browse available data in the CWMS catalog
  humanURL: https://cwms-data.usace.army.mil/cwms-data/
  baseURL: https://cwms-data.usace.army.mil/cwms-data
  tags:
  - Catalog
  properties:
  - type: OpenAPI
    url: openapi/united-states-army-corps-of-engineers-catalog-api-openapi.yml
  - type: Documentation
    url: https://cwms-data.usace.army.mil/cwms-data/
  - type: GitHubRepository
    url: https://github.com/USACE/cwms-data-api
  - type: SwaggerUI
    url: https://cwms-data.usace.army.mil/cwms-data/swagger-ui.html
- aid: united-states-army-corps-of-engineers:united-states-army-corps-of-engineers-forecasts-api
  name: United States Army Corps of Engineers Forecasts API
  description: Forecast instances and specifications
  humanURL: https://cwms-data.usace.army.mil/cwms-data/
  baseURL: https://cwms-data.usace.army.mil/cwms-data
  tags:
  - Forecast
  tags_raw:
  - Forecasts
  properties:
  - type: OpenAPI
    url: openapi/united-states-army-corps-of-engineers-forecasts-api-openapi.yml
  - type: Documentation
    url: https://cwms-data.usace.army.mil/cwms-data/
  - type: GitHubRepository
    url: https://github.com/USACE/cwms-data-api
  - type: SwaggerUI
    url: https://cwms-data.usace.army.mil/cwms-data/swagger-ui.html
- aid: united-states-army-corps-of-engineers:united-states-army-corps-of-engineers-levels-api
  name: United States Army Corps of Engineers Levels API
  description: Location levels and stage-discharge relationships
  humanURL: https://cwms-data.usace.army.mil/cwms-data/
  baseURL: https://cwms-data.usace.army.mil/cwms-data
  tags:
  - Levels
  properties:
  - type: OpenAPI
    url: openapi/united-states-army-corps-of-engineers-levels-api-openapi.yml
  - type: Documentation
    url: https://cwms-data.usace.army.mil/cwms-data/
  - type: GitHubRepository
    url: https://github.com/USACE/cwms-data-api
  - type: SwaggerUI
    url: https://cwms-data.usace.army.mil/cwms-data/swagger-ui.html
- aid: united-states-army-corps-of-engineers:united-states-army-corps-of-engineers-locations-api
  name: United States Army Corps of Engineers Locations API
  description: USACE location data including dams, reservoirs, streamgages, and sites
  humanURL: https://cwms-data.usace.army.mil/cwms-data/
  baseURL: https://cwms-data.usace.army.mil/cwms-data
  tags:
  - Locations
  properties:
  - type: OpenAPI
    url: openapi/united-states-army-corps-of-engineers-locations-api-openapi.yml
  - type: Documentation
    url: https://cwms-data.usace.army.mil/cwms-data/
  - type: GitHubRepository
    url: https://github.com/USACE/cwms-data-api
  - type: SwaggerUI
    url: https://cwms-data.usace.army.mil/cwms-data/swagger-ui.html
- aid: united-states-army-corps-of-engineers:united-states-army-corps-of-engineers-parameters-api
  name: United States Army Corps of Engineers Parameters API
  description: Physical parameters and units
  humanURL: https://cwms-data.usace.army.mil/cwms-data/
  baseURL: https://cwms-data.usace.army.mil/cwms-data
  tags:
  - Parameters
  properties:
  - type: OpenAPI
    url: openapi/united-states-army-corps-of-engineers-parameters-api-openapi.yml
  - type: Documentation
    url: https://cwms-data.usace.army.mil/cwms-data/
  - type: GitHubRepository
    url: https://github.com/USACE/cwms-data-api
  - type: SwaggerUI
    url: https://cwms-data.usace.army.mil/cwms-data/swagger-ui.html
- aid: united-states-army-corps-of-engineers:united-states-army-corps-of-engineers-projects-api
  name: United States Army Corps of Engineers Projects API
  description: USACE project management including locks, gates, turbines, and outlets
  humanURL: https://cwms-data.usace.army.mil/cwms-data/
  baseURL: https://cwms-data.usace.army.mil/cwms-data
  tags:
  - Project
  tags_raw:
  - Projects
  properties:
  - type: OpenAPI
    url: openapi/united-states-army-corps-of-engineers-projects-api-openapi.yml
  - type: Documentation
    url: https://cwms-data.usace.army.mil/cwms-data/
  - type: GitHubRepository
    url: https://github.com/USACE/cwms-data-api
  - type: SwaggerUI
    url: https://cwms-data.usace.army.mil/cwms-data/swagger-ui.html
- aid: united-states-army-corps-of-engineers:united-states-army-corps-of-engineers-ratings-api
  name: United States Army Corps of Engineers Ratings API
  description: Rating tables for converting between measured values
  humanURL: https://cwms-data.usace.army.mil/cwms-data/
  baseURL: https://cwms-data.usace.army.mil/cwms-data
  tags:
  - Ratings
  properties:
  - type: OpenAPI
    url: openapi/united-states-army-corps-of-engineers-ratings-api-openapi.yml
  - type: Documentation
    url: https://cwms-data.usace.army.mil/cwms-data/
  - type: GitHubRepository
    url: https://github.com/USACE/cwms-data-api
  - type: SwaggerUI
    url: https://cwms-data.usace.army.mil/cwms-data/swagger-ui.html
- aid: united-states-army-corps-of-engineers:united-states-army-corps-of-engineers-time-series-api
  name: United States Army Corps of Engineers Time Series API
  description: Time series data retrieval and management
  humanURL: https://cwms-data.usace.army.mil/cwms-data/
  baseURL: https://cwms-data.usace.army.mil/cwms-data
  tags:
  - Time Series
  properties:
  - type: OpenAPI
    url: openapi/united-states-army-corps-of-engineers-time-series-api-openapi.yml
  - type: Documentation
    url: https://cwms-data.usace.army.mil/cwms-data/
  - type: GitHubRepository
    url: https://github.com/USACE/cwms-data-api
  - type: SwaggerUI
    url: https://cwms-data.usace.army.mil/cwms-data/swagger-ui.html
- aid: united-states-army-corps-of-engineers:united-states-army-corps-of-engineers-version-api
  name: United States Army Corps of Engineers Version API
  description: API version information
  humanURL: https://cwms-data.usace.army.mil/cwms-data/
  baseURL: https://cwms-data.usace.army.mil/cwms-data
  tags:
  - Version
  properties:
  - type: OpenAPI
    url: openapi/united-states-army-corps-of-engineers-version-api-openapi.yml
  - type: Documentation
    url: https://cwms-data.usace.army.mil/cwms-data/
  - type: GitHubRepository
    url: https://github.com/USACE/cwms-data-api
  - type: SwaggerUI
    url: https://cwms-data.usace.army.mil/cwms-data/swagger-ui.html
common:
- type: License
  name: MIT
  url: https://github.com/USACE/cwms-data-api/blob/develop/LICENSE
- type: AgenticAccess
  url: agentic-access/united-states-army-corps-of-engineers-agentic-access.yml
- type: DomainSecurity
  url: security/united-states-army-corps-of-engineers-domain-security.yml
- type: Authentication
  url: authentication/united-states-army-corps-of-engineers-authentication.yml
- type: LinkedIn
  url: https://www.linkedin.com/company/us-army-corps-of-engineers
- type: Website
  url: https://www.usace.army.mil/
- type: OpenData
  url: https://www.usace.army.mil/open/
- type: GeospatialData
  url: https://geospatial-usace.opendata.arcgis.com/
- type: WaterData
  url: https://water.usace.army.mil/data
- type: DigitalLibrary
  url: https://usace.contentdm.oclc.org/
- type: GitHub
  url: https://github.com/USACE
- type: PermitsData
  url: https://permits.ops.usace.army.mil/
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com