U.S. Geological Survey

The U.S. Geological Survey (USGS) is a scientific agency of the U.S. government that conducts research and provides data on the natural resources and hazards of the United States. The USGS is known for its work in mapping and monitoring earthquakes, volcanoes, and landslides to help mitigate risks and protect communities. USGS also studies water resources including streamflow, groundwater, and water quality through a nationwide network of monitoring stations. Their public APIs provide programmatic access to real-time earthquake data, water monitoring observations, seismic design parameters, and geospatial data products.

U.S. Geological Survey publishes 42 APIs on the APIs.io network, including USGS Water Data APIs, Catalog API, Earthquakes API, and 39 more. Tagged areas include Federal-Government, Geological, Earth Science, Natural Resources, and Earthquake.

The U.S. Geological Survey catalog on APIs.io includes 2 JSON-LD contexts and 3 Spectral governance rulesets.

U.S. Geological Survey’s developer surface includes authentication, documentation, engineering blog, and 8 more developer resources.

🌐 Visit website 📡 Source on GitHub

42.0/100 developing ▬ flat Agent 28/100 agent aware Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

AccessFreeSelf serve⚡ Free to try

1 APIs 6 Features 5 Use Cases

Federal-GovernmentGeologicalEarth Science Natural Resources Earthquake Water Hydrology

Kin Score

Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0

Composite quality — 42.0/100 · developing

Contract Quality 13.3 / 19

Developer Ergonomics 5.4 / 15

Access Clarity 2.0 / 15

Operational Transparency 0.8 / 10

Contract Governance 4.2 / 9

Discoverability 4.0 / 8

Regulatory Posture 6.4 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 28/100 · 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 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 0 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

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 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/.

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/u-s-geological-survey: 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 47

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

USGS Water Data APIs

The USGS Water Data OGC API — an OGC API Features service declaring 18 conformance classes, including OGC API Common Parts 1-3, Features Parts 1-4 and CQL2 filtering, and servin...

Asset Identifier Service (AIS)

The USGS Asset Identifier Service (AIS) allows USGS personnel to reserve, register, publish, and manage USGS persistent identifiers to make research more Findable, Accessible, I...

Seismic Design Web Service

Web services produced by the U.S. Geological Survey for calculating parameter values from various seismic design reference documents for engineering and construction purposes.

ScienceBase

ScienceBase is a USGS Trusted Digital Repository that provides permission-controlled and public access to scientific data products through a REST API supporting upload, document...

StreamStats Web Services

The StreamStats Web Services provide HTTP-accessible hydrological analysis services for delineating drainage areas, estimating peak flows, and computing basin characteristics fo...

USGS Water Services (Legacy)

The original USGS NWIS water services API providing streamflow, groundwater, water quality, and site information via REST protocol in XML and other media types. High availabilit...

U.S. Geological Survey Catalog API

Discover available catalogs, contributors, and supported parameter values.

U.S. Geological Survey Earthquakes API

Query and retrieve earthquake event data from the USGS earthquake catalog.

U.S. Geological Survey Monitoring Locations API

USGS stream gages, groundwater wells, and other water monitoring stations.

U.S. Geological Survey Reference Data API

Reference code tables including agency codes, datum types, and aquifer data.

U.S. Geological Survey Time Series Data API

Continuous and daily value water data from USGS monitoring locations.

U.S. Geological Survey Agency Codes API

Code identifying the agency or organization used for site information, data sources, and permitting agencies. Agency codes are fixed values assigned by the National Water Inform...

U.S. Geological Survey Altitude Datums API

The recommended vertical datum is NAVD88 (North American Vertical Datum of 1988) where applicable as stated in Office of Information Technical Memo 2002.01. NGVD29 (National Geo...

U.S. Geological Survey Aquifer Codes API

Local aquifers in USGS data are identified by an aquifer name and geohydrologic unit code (a three-digit number related to the age of the formation, followed by a 4 or 5 charact...

U.S. Geological Survey Aquifer Types API

Groundwater occurs in aquifers under two different conditions. Where water only partly fills an aquifer, the upper surface is free to rise and decline. These aquifers are referr...

U.S. Geological Survey Channel Measurements API

Channel measurements taken as part of streamflow field measurements.

U.S. Geological Survey Citations API

Citations associated with water measurement methods.

U.S. Geological Survey Combined Metadata API

This endpoint combines metadata from timeseries and field measurements collections by site.

U.S. Geological Survey Continuous API

Continuous data are collected via automated sensors installed at a monitoring location. They are collected at a high frequency and often at a fixed 15-minute interval. Depending...

U.S. Geological Survey Coordinate Accuracy Codes API

Appropriate code on the schedule to indicate the accuracy of the latitude-longitude values.

U.S. Geological Survey Coordinate Datum Codes API

Horizontal datum code for the latitude/longitude coordinates. There are currently more than 300 horizontal datums available for entry.

U.S. Geological Survey Coordinate Method Codes API

Methods used to determine latitude-longitude values.

U.S. Geological Survey Counties API

The name of the county or county equivalent (parish, borough, planning reagion, etc.) in which the site is located. List includes Census Bureau FIPS county codes, names and asso...

U.S. Geological Survey Countries API

FIPS country codes and names.

U.S. Geological Survey Daily API

Daily data provide one data value to represent water conditions for the day. Throughout much of the history of the USGS, the primary water data available was daily data collecte...

U.S. Geological Survey Field Measurements API

Field measurements are physically measured values collected during a visit to the monitoring location. Field measurements consist of measurements of gage height and discharge, a...

U.S. Geological Survey Field Measurements Metadata API

This endpoint provides metadata about field measurement collections, including when the earliest and most recent observations for a parameter occurred at a monitoring location a...

U.S. Geological Survey Hydrologic Unit Codes API

Hydrologic units are geographic areas representing part or all of a surface drainage basin or distinct hydrologic feature identified by a unique number (HUC), and a name. The Un...

U.S. Geological Survey Latest Continuous API

This endpoint provides the most recent observation for each time series of continuous data. Continuous data are collected via automated sensors installed at a monitoring locatio...

U.S. Geological Survey Latest Daily API

Daily data provide one data value to represent water conditions for the day. Throughout much of the history of the USGS, the primary water data available was daily data collecte...

U.S. Geological Survey Latest Field Measurements API

Field measurements are physically measured values collected during a visit to the monitoring location. Field measurements consist of measurements of gage height and discharge, a...

U.S. Geological Survey Medium Codes API

Medium refers to the specific environmental medium from which the sample was collected. Medium type differs from site type because one site type, such as surface water, could ha...

U.S. Geological Survey Method Categories API

Categorical standards for methods describing the associated data's appropriateness for an intended use.

U.S. Geological Survey Method Citations API

Citation identifiers for water measurement methods.

U.S. Geological Survey Methods API

Water measurement or water-quality analytical methods. Codes and descriptions defining a method for calculating or measuring the value of a water quality or quantity parameter. ...

U.S. Geological Survey National Aquifer Codes API

National aquifers are the principal aquifers or aquifer systems in the United States, defined as regionally extensive aquifers or aquifer systems that have the potential to be u...

U.S. Geological Survey Parameter Codes API

Parameter codes are 5-digit codes and associated descriptions used to identify the constituent measured and the units of measure. Some parameter code definitions include informa...

U.S. Geological Survey Peaks API

Annual peak flow values are the maximum instantaneous streamflow values recorded at a particular site for the entire water year from October 1 to September 30. Note that the ann...

U.S. Geological Survey Reliability Codes API

Code indicating the reliability of the data available for the site.

U.S. Geological Survey Server API

The United States Geological Survey (USGS) collects water data at monitoring locations across the United States using both automated sensors and manual data collection. These AP...

U.S. Geological Survey Site Types API

The hydrologic cycle setting or a man-made feature thought to affect the hydrologic conditions measured at a site. Primary and secondary site types associated with data collecti...

U.S. Geological Survey States API

State name or territory. Includes U.S. states and foreign entities classified under FIPS as 'Principal Administrative Divisions'.

U.S. Geological Survey Statistic Codes API

Statistic codes.

U.S. Geological Survey Time Series Metadata API

Daily data and continuous measurements are grouped into time series, which represent a collection of observations of a single parameter, potentially aggregated using a standard ...

U.S. Geological Survey Time Series Revisions API

Approved water data are considered published record, but on occasion changes or deletions (revisions) must be made to data after they are approved. Data revisions are rare becau...

U.S. Geological Survey Time Zone Codes API

The ISO 8601 standard defines time zone offsets as a numerical value added to a local time to convert it to Coordinated Universal Time (UTC), either as +hh:mm or -hh:mm, or repr...

U.S. Geological Survey Topographic Codes API

The code that best describes the topographic setting in which the site is located. Topographic setting refers to the geomorphic features in the vicinity of the site.

OPEN COLLECTION

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Pricing Plans 1

Published pricing tiers and plan structures.

U S Geological Survey Plans Pricing

1 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

U S Geological Survey Rate Limits

2 limits

RATE LIMITS

FinOps 1

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

U S Geological Survey Finops

FINOPS

Features 6

Notable capabilities this provider offers.

Earthquake Catalog Query

Search the USGS ANSS ComCat earthquake catalog by geography, time, magnitude, depth, and event type with 20,000 event limit per query.

Real-Time Earthquake Data

Access near real-time earthquake data updated within minutes of events occurring anywhere in the world.

Water Monitoring Locations

Query USGS stream gages, groundwater wells, and other water quality monitoring stations by state, watershed, or geographic area.

Water Data Time Series

Retrieve continuous and daily water data including streamflow, stage, temperature, and water quality parameters.

OGC API Compliance

USGS Water Data APIs implement OGC API Features standard supporting CQL2 filtering, spatial queries, and standardized output formats.

GeoJSON Output

All spatial data returned in GeoJSON format compatible with mapping libraries and geospatial analysis tools.

Semantic Vocabularies 2

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

Usgs Earthquake Api Context

6 classes · 35 properties

JSON-LD

Usgs Water Data Api Context

12 classes · 30 properties

JSON-LD

Spectral Rules 3

Spectral governance rulesets for linting and validating these APIs.

U.S. Geological Survey API Rules

5 rules · 3 warnings 2 info

SPECTRAL

U.S. Geological Survey API Rules

9 rules · 1 errors 7 warnings 1 info

SPECTRAL

U.S. Geological Survey API Rules

33 rules · 9 errors 14 warnings 10 info

SPECTRAL

7 properties

JSON STRUCTURE

Scroll for all 18

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

U S Geological Survey Agentic Access

11 operations

11 operations · 0 acting

AGENTIC

Use Cases 5

What developers build with this provider.

Earthquake Hazard Monitoring

Emergency managers and scientists monitor real-time earthquake activity for hazard assessment and emergency response planning.

Flood Forecasting

Hydrologists use USGS streamflow data for flood prediction, water supply forecasting, and reservoir management.

Groundwater Management

Water managers track groundwater level trends for sustainable aquifer management and drought assessment.

Environmental Research

Researchers use USGS geological and water data for environmental impact assessments and climate change studies.

Engineering Design

Civil engineers use USGS water data and seismic design services for infrastructure planning and construction.

Integrations 4

Pre-built integrations with other platforms and tools.

USGS GitHub Organization

Open-source tools including libcomcat, rcomcat, and other clients for accessing USGS earthquake and water data.

USGS Water Data for the Nation

The flagship USGS water data portal at waterdata.usgs.gov providing maps and tools built on the NWIS water services API.

National Water Information System (NWIS)

Legacy USGS water data system providing the underlying data for Water Data APIs with millions of site records.

FDSN Standards

USGS earthquake API implements FDSN (International Federation of Digital Seismograph Networks) web service specifications.

Resources

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 2

Pagination, idempotency, versioning, errors, and events

SpectralRules

SpectralRules

Vocabulary

Vocabulary

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 3

Authentication, authorization, and security posture

VulnerabilityDisclosure

VulnerabilityDisclosure

DomainSecurity

DomainSecurity

Authentication

Authentication

Company 3

The organization behind the API

LinkedIn

Website

Website

Blog

Blog

Source (apis.yml)

aid: u-s-geological-survey
url: https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/apis.yml
apis:
- aid: u-s-geological-survey:water-data-ogc-api
  name: USGS Water Data APIs
  baseURL: https://api.waterdata.usgs.gov/ogcapi/v0
  tags:
  - Water
  - Geospatial
  - OGC
  - OGC API Features
  humanURL: https://api.waterdata.usgs.gov/docs/
  properties:
  - url: https://api.waterdata.usgs.gov/ogcapi/v0/openapi
    type: OpenAPI
  - url: https://api.waterdata.usgs.gov/ogcapi/v0/conformance
    type: ConformanceEndpoint
  - url: https://api.waterdata.usgs.gov/docs/
    type: Documentation
  description: 'The USGS Water Data OGC API — an OGC API Features service declaring 18 conformance classes, including OGC
    API Common Parts 1-3, Features Parts 1-4 and CQL2 filtering, and serving 37 collections. Verified live 2026-08-30: /conformance
    returns the class URIs, /collections returns 37 entries, and the landing page advertises a first-party OpenAPI 3.0.2 with
    189 paths at its service-desc link. A control path on the same host returns 404, so the host discriminates and the 200s
    are evidence rather than a catch-all. The live /conformance endpoint is NOT registered as a property: `Conformance` is
    the local artifact type (5,889 providers use it for conformance/*.yml on disk), and there is no pointer class meaning
    a live OGC conformance endpoint. That gap is roadmap#80''s failure mode 3, and overloading an existing type to work around
    it would hide the gap rather than record it. The classes are captured in conformance/ with their source URL.'
- aid: u-s-geological-survey:asset-identifier-service-ais
  name: Asset Identifier Service (AIS)
  tags:
  - Identifiers
  - Research Data
  humanURL: https://www.usgs.gov/tools/asset-identifier-service-ais
  properties:
  - url: https://www.usgs.gov/tools/asset-identifier-service-ais
    type: Documentation
  description: The USGS Asset Identifier Service (AIS) allows USGS personnel to reserve, register, publish, and manage USGS
    persistent identifiers to make research more Findable, Accessible, Interoperable, and Reusable (FAIR).
- aid: u-s-geological-survey:seismic-design-web-service
  name: Seismic Design Web Service
  tags:
  - Seismic
  - Engineering
  humanURL: https://earthquake.usgs.gov/ws/designmaps/
  properties:
  - url: https://earthquake.usgs.gov/ws/designmaps/
    type: Documentation
  description: Web services produced by the U.S. Geological Survey for calculating parameter values from various seismic design
    reference documents for engineering and construction purposes.
- aid: u-s-geological-survey:sciencebase
  name: ScienceBase
  tags:
  - Research Data
  - Data Repository
  humanURL: https://www.usgs.gov/tools/sciencebase
  properties:
  - url: https://www.usgs.gov/tools/sciencebase
    type: Documentation
  - url: https://www.usgs.gov/sciencebase-instructions-and-documentation/api-and-web-services
    type: Documentation
    title: ScienceBase API Documentation
  description: ScienceBase is a USGS Trusted Digital Repository that provides permission-controlled and public access to scientific
    data products through a REST API supporting upload, documentation, and sharing of research data.
- aid: u-s-geological-survey:streamstats-web-services
  name: StreamStats Web Services
  tags:
  - Hydrology
  - Streamflow
  - Statistics
  humanURL: https://www.usgs.gov/tools/streamstats-web-services
  properties:
  - url: https://www.usgs.gov/tools/streamstats-web-services
    type: Documentation
  description: The StreamStats Web Services provide HTTP-accessible hydrological analysis services for delineating drainage
    areas, estimating peak flows, and computing basin characteristics for water resources planning.
- aid: u-s-geological-survey:usgs-water-services
  name: USGS Water Services (Legacy)
  tags:
  - Water
  - Hydrology
  - Legacy
  humanURL: https://www.usgs.gov/tools/usgs-water-services
  properties:
  - url: https://nwis.waterservices.usgs.gov/
    type: Documentation
  description: The original USGS NWIS water services API providing streamflow, groundwater, water quality, and site information
    via REST protocol in XML and other media types. High availability and fault-tolerant design.
- aid: u-s-geological-survey:u-s-geological-survey-catalog-api
  name: U.S. Geological Survey Catalog API
  description: Discover available catalogs, contributors, and supported parameter values.
  humanURL: https://earthquake.usgs.gov/earthquakes/feed/
  baseURL: https://earthquake.usgs.gov/fdsnws/event/1
  tags:
  - Catalog
  properties:
  - type: OpenAPI
    url: openapi/u-s-geological-survey-catalog-api-openapi.yml
  - type: Documentation
    url: https://earthquake.usgs.gov/fdsnws/event/1/
  - type: GettingStarted
    url: https://earthquake.usgs.gov/earthquakes/feed/
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/json-schema/usgs-earthquake-api-earthquake-properties-schema.json
  - type: JSONLD
    url: https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/json-ld/usgs-earthquake-api-context.jsonld
  - type: Examples
    url: https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/examples/usgs-earthquake-api-earthquake-properties-example.json
  - type: Documentation
    url: https://api.waterdata.usgs.gov/docs/
  - type: Authentication
    url: https://api.waterdata.usgs.gov/signup/
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/json-schema/usgs-water-data-api-monitoring-location-properties-schema.json
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/json-schema/usgs-water-data-api-time-series-properties-schema.json
  - type: JSONLD
    url: https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/json-ld/usgs-water-data-api-context.jsonld
  - type: Examples
    url: https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/examples/usgs-water-data-api-monitoring-location-properties-example.json
- aid: u-s-geological-survey:u-s-geological-survey-earthquakes-api
  name: U.S. Geological Survey Earthquakes API
  description: Query and retrieve earthquake event data from the USGS earthquake catalog.
  humanURL: https://earthquake.usgs.gov/earthquakes/feed/
  baseURL: https://earthquake.usgs.gov/fdsnws/event/1
  tags:
  - Earthquakes
  properties:
  - type: OpenAPI
    url: openapi/u-s-geological-survey-earthquakes-api-openapi.yml
  - type: Documentation
    url: https://earthquake.usgs.gov/fdsnws/event/1/
  - type: GettingStarted
    url: https://earthquake.usgs.gov/earthquakes/feed/
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/json-schema/usgs-earthquake-api-earthquake-properties-schema.json
  - type: JSONLD
    url: https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/json-ld/usgs-earthquake-api-context.jsonld
  - type: Examples
    url: https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/examples/usgs-earthquake-api-earthquake-properties-example.json
  - type: Documentation
    url: https://api.waterdata.usgs.gov/docs/
  - type: Authentication
    url: https://api.waterdata.usgs.gov/signup/
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/json-schema/usgs-water-data-api-monitoring-location-properties-schema.json
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/json-schema/usgs-water-data-api-time-series-properties-schema.json
  - type: JSONLD
    url: https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/json-ld/usgs-water-data-api-context.jsonld
  - type: Examples
    url: https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/examples/usgs-water-data-api-monitoring-location-properties-example.json
- aid: u-s-geological-survey:u-s-geological-survey-monitoring-locations-api
  name: U.S. Geological Survey Monitoring Locations API
  description: USGS stream gages, groundwater wells, and other water monitoring stations.
  humanURL: https://earthquake.usgs.gov/earthquakes/feed/
  baseURL: https://earthquake.usgs.gov/fdsnws/event/1
  tags:
  - Monitoring Locations
  properties:
  - type: OpenAPI
    url: openapi/u-s-geological-survey-monitoring-locations-api-openapi.yml
  - type: Documentation
    url: https://earthquake.usgs.gov/fdsnws/event/1/
  - type: GettingStarted
    url: https://earthquake.usgs.gov/earthquakes/feed/
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/json-schema/usgs-earthquake-api-earthquake-properties-schema.json
  - type: JSONLD
    url: https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/json-ld/usgs-earthquake-api-context.jsonld
  - type: Examples
    url: https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/examples/usgs-earthquake-api-earthquake-properties-example.json
  - type: Documentation
    url: https://api.waterdata.usgs.gov/docs/
  - type: Authentication
    url: https://api.waterdata.usgs.gov/signup/
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/json-schema/usgs-water-data-api-monitoring-location-properties-schema.json
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/json-schema/usgs-water-data-api-time-series-properties-schema.json
  - type: JSONLD
    url: https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/json-ld/usgs-water-data-api-context.jsonld
  - type: Examples
    url: https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/examples/usgs-water-data-api-monitoring-location-properties-example.json
- aid: u-s-geological-survey:u-s-geological-survey-reference-data-api
  name: U.S. Geological Survey Reference Data API
  description: Reference code tables including agency codes, datum types, and aquifer data.
  humanURL: https://earthquake.usgs.gov/earthquakes/feed/
  baseURL: https://earthquake.usgs.gov/fdsnws/event/1
  tags:
  - Reference Data
  properties:
  - type: OpenAPI
    url: openapi/u-s-geological-survey-reference-data-api-openapi.yml
  - type: Documentation
    url: https://earthquake.usgs.gov/fdsnws/event/1/
  - type: GettingStarted
    url: https://earthquake.usgs.gov/earthquakes/feed/
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/json-schema/usgs-earthquake-api-earthquake-properties-schema.json
  - type: JSONLD
    url: https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/json-ld/usgs-earthquake-api-context.jsonld
  - type: Examples
    url: https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/examples/usgs-earthquake-api-earthquake-properties-example.json
  - type: Documentation
    url: https://api.waterdata.usgs.gov/docs/
  - type: Authentication
    url: https://api.waterdata.usgs.gov/signup/
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/json-schema/usgs-water-data-api-monitoring-location-properties-schema.json
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/json-schema/usgs-water-data-api-time-series-properties-schema.json
  - type: JSONLD
    url: https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/json-ld/usgs-water-data-api-context.jsonld
  - type: Examples
    url: https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/examples/usgs-water-data-api-monitoring-location-properties-example.json
- aid: u-s-geological-survey:u-s-geological-survey-time-series-data-api
  name: U.S. Geological Survey Time Series Data API
  description: Continuous and daily value water data from USGS monitoring locations.
  humanURL: https://earthquake.usgs.gov/earthquakes/feed/
  baseURL: https://earthquake.usgs.gov/fdsnws/event/1
  tags:
  - Time Series Data
  properties:
  - type: OpenAPI
    url: openapi/u-s-geological-survey-time-series-data-api-openapi.yml
  - type: Documentation
    url: https://earthquake.usgs.gov/fdsnws/event/1/
  - type: GettingStarted
    url: https://earthquake.usgs.gov/earthquakes/feed/
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/json-schema/usgs-earthquake-api-earthquake-properties-schema.json
  - type: JSONLD
    url: https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/json-ld/usgs-earthquake-api-context.jsonld
  - type: Examples
    url: https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/examples/usgs-earthquake-api-earthquake-properties-example.json
  - type: Documentation
    url: https://api.waterdata.usgs.gov/docs/
  - type: Authentication
    url: https://api.waterdata.usgs.gov/signup/
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/json-schema/usgs-water-data-api-monitoring-location-properties-schema.json
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/json-schema/usgs-water-data-api-time-series-properties-schema.json
  - type: JSONLD
    url: https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/json-ld/usgs-water-data-api-context.jsonld
  - type: Examples
    url: https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/examples/usgs-water-data-api-monitoring-location-properties-example.json
- aid: u-s-geological-survey:u-s-geological-survey-agency-codes-api
  name: U.S. Geological Survey Agency Codes API
  description: Code identifying the agency or organization used for site information, data sources, and permitting agencies.
    Agency codes are fixed values assigned by the National Water Information System (NWIS).
  humanURL: https://www.usgs.gov/tools/asset-identifier-service-ais
  baseURL: https://earthquake.usgs.gov/fdsnws/event/1
  tags:
  - agency-codes
  properties:
  - type: OpenAPI
    url: openapi/u-s-geological-survey-agency-codes-api-openapi.yml
  - type: Conformance
    url: conformance/u-s-geological-survey-conformance.yml
  - type: Documentation
    url: https://earthquake.usgs.gov/fdsnws/event/1/
  - type: GettingStarted
    url: https://earthquake.usgs.gov/earthquakes/feed/
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/json-schema/usgs-earthquake-api-earthquake-properties-schema.json
  - type: JSONLD
    url: https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/json-ld/usgs-earthquake-api-context.jsonld
  - type: Examples
    url: https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/examples/usgs-earthquake-api-earthquake-properties-example.json
  - type: Documentation
    url: https://api.waterdata.usgs.gov/docs/
  - type: Authentication
    url: https://api.waterdata.usgs.gov/signup/
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/json-schema/usgs-water-data-api-monitoring-location-properties-schema.json
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/json-schema/usgs-water-data-api-time-series-properties-schema.json
  - type: JSONLD
    url: https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/json-ld/usgs-water-data-api-context.jsonld
  - type: Examples
    url: https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/examples/usgs-water-data-api-monitoring-location-properties-example.json
- aid: u-s-geological-survey:u-s-geological-survey-altitude-datums-api
  name: U.S. Geological Survey Altitude Datums API
  description: The recommended vertical datum is NAVD88 (North American Vertical Datum of 1988) where applicable as stated
    in Office of Information Technical Memo 2002.01. NGVD29 (National Geodetic Vertical Datum of 1929) and NAVD88 are the
    only datums that can be converted on output. NWIS uses the North American Vertical Datum Conversions (VERTCON) of the
    National Geodetic Survey to convert from NGVD29 to NAVD88 or vice versa. Conversions to or from other vertical datums
    are not available.
  humanURL: https://www.usgs.gov/tools/asset-identifier-service-ais
  baseURL: https://earthquake.usgs.gov/fdsnws/event/1
  tags:
  - altitude-datums
  properties:
  - type: OpenAPI
    url: openapi/u-s-geological-survey-altitude-datums-api-openapi.yml
  - type: Conformance
    url: conformance/u-s-geological-survey-conformance.yml
  - type: Documentation
    url: https://earthquake.usgs.gov/fdsnws/event/1/
  - type: GettingStarted
    url: https://earthquake.usgs.gov/earthquakes/feed/
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/json-schema/usgs-earthquake-api-earthquake-properties-schema.json
  - type: JSONLD
    url: https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/json-ld/usgs-earthquake-api-context.jsonld
  - type: Examples
    url: https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/examples/usgs-earthquake-api-earthquake-properties-example.json
  - type: Documentation
    url: https://api.waterdata.usgs.gov/docs/
  - type: Authentication
    url: https://api.waterdata.usgs.gov/signup/
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/json-schema/usgs-water-data-api-monitoring-location-properties-schema.json
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/json-schema/usgs-water-data-api-time-series-properties-schema.json
  - type: JSONLD
    url: https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/json-ld/usgs-water-data-api-context.jsonld
  - type: Examples
    url: https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/examples/usgs-water-data-api-monitoring-location-properties-example.json
- aid: u-s-geological-survey:u-s-geological-survey-aquifer-codes-api
  name: U.S. Geological Survey Aquifer Codes API
  description: Local aquifers in USGS data are identified by an aquifer name and geohydrologic unit code (a three-digit number
    related to the age of the formation, followed by a 4 or 5 character abbreviation for the geologic unit or aquifer name).
    For the age of formation (aquifer age), generally the smaller the number represents the younger the geohydrologic unit.
    Aquifer names and the definition of an aquifer can be very subjective. One rock unit may be called different aquifer names
    by different people. Local aquifers and layered aquifers are often grouped into larger named regional aquifers or aquifer
    systems. For example, the National Northern Atlantic Coastal Plain aquifer system (National aquifer) consists of five
    layered regional aquifers. Each regional aquifer is divided into two or more aquifers which may have a different name
    in each of the states in which the aquifer is found.
  humanURL: https://www.usgs.gov/tools/asset-identifier-service-ais
  baseURL: https://earthquake.usgs.gov/fdsnws/event/1
  tags:
  - aquifer-codes
  properties:
  - type: OpenAPI
    url: openapi/u-s-geological-survey-aquifer-codes-api-openapi.yml
  - type: Conformance
    url: conformance/u-s-geological-survey-conformance.yml
  - type: Documentation
    url: https://earthquake.usgs.gov/fdsnws/event/1/
  - type: GettingStarted
    url: https://earthquake.usgs.gov/earthquakes/feed/
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/json-schema/usgs-earthquake-api-earthquake-properties-schema.json
  - type: JSONLD
    url: https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/json-ld/usgs-earthquake-api-context.jsonld
  - type: Examples
    url: https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/examples/usgs-earthquake-api-earthquake-properties-example.json
  - type: Documentation
    url: https://api.waterdata.usgs.gov/docs/
  - type: Authentication
    url: https://api.waterdata.usgs.gov/signup/
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/json-schema/usgs-water-data-api-monitoring-location-properties-schema.json
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/json-schema/usgs-water-data-api-time-series-properties-schema.json
  - type: JSONLD
    url: https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/json-ld/usgs-water-data-api-context.jsonld
  - type: Examples
    url: https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/examples/usgs-water-data-api-monitoring-location-properties-example.json
- aid: u-s-geological-survey:u-s-geological-survey-aquifer-types-api
  name: U.S. Geological Survey Aquifer Types API
  description: Groundwater occurs in aquifers under two different conditions. Where water only partly fills an aquifer, the
    upper surface is free to rise and decline. These aquifers are referred to as unconfined (or water-table) aquifers. Where
    water completely fills an aquifer that is overlain by a confining bed, the aquifer is referred to as a confined (or artesian)
    aquifer. When a confined aquifer is penetrated by a well, the water level in the well will rise above the top of the aquifer
    (but not necessarily above land surface).
  humanURL: https://www.usgs.gov/tools/asset-identifier-service-ais
  baseURL: https://earthquake.usgs.gov/fdsnws/event/1
  tags:
  - aquifer-types
  properties:
  - type: OpenAPI
    url: openapi/u-s-geological-survey-aquifer-types-api-openapi.yml
  - type: Conformance
    url: conformance/u-s-geological-survey-conformance.yml
  - type: Documentation
    url: https://earthquake.usgs.gov/fdsnws/event/1/
  - type: GettingStarted
    url: https://earthquake.usgs.gov/earthquakes/feed/
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/json-schema/usgs-earthquake-api-earthquake-properties-schema.json
  - type: JSONLD
    url: https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/json-ld/usgs-earthquake-api-context.jsonld
  - type: Examples
    url: https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/examples/usgs-earthquake-api-earthquake-properties-example.json
  - type: Documentation
    url: https://api.waterdata.usgs.gov/docs/
  - type: Authentication
    url: https://api.waterdata.usgs.gov/signup/
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/json-schema/usgs-water-data-api-monitoring-location-properties-schema.json
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/json-schema/usgs-water-data-api-time-series-properties-schema.json
  - type: JSONLD
    url: https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/json-ld/usgs-water-data-api-context.jsonld
  - type: Examples
    url: https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/examples/usgs-water-data-api-monitoring-location-properties-example.json
- aid: u-s-geological-survey:u-s-geological-survey-channel-measurements-api
  name: U.S. Geological Survey Channel Measurements API
  description: Channel measurements taken as part of streamflow field measurements.
  humanURL: https://www.usgs.gov/tools/asset-identifier-service-ais
  baseURL: https://earthquake.usgs.gov/fdsnws/event/1
  tags:
  - channel-measurements
  properties:
  - type: OpenAPI
    url: openapi/u-s-geological-survey-channel-measurements-api-openapi.yml
  - type: Conformance
    url: conformance/u-s-geological-survey-conformance.yml
  - type: Documentation
    url: https://earthquake.usgs.gov/fdsnws/event/1/
  - type: GettingStarted
    url: https://earthquake.usgs.gov/earthquakes/feed/
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/json-schema/usgs-earthquake-api-earthquake-properties-schema.json
  - type: JSONLD
    url: https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/json-ld/usgs-earthquake-api-context.jsonld
  - type: Examples
    url: https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/examples/usgs-earthquake-api-earthquake-properties-example.json
  - type: Documentation
    url: https://api.waterdata.usgs.gov/docs/
  - type: Authentication
    url: https://api.waterdata.usgs.gov/signup/
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/json-schema/usgs-water-data-api-monitoring-location-properties-schema.json
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/json-schema/usgs-water-data-api-time-series-properties-schema.json
  - type: JSONLD
    url: https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/json-ld/usgs-water-data-api-context.jsonld
  - type: Examples
    url: https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/examples/usgs-water-data-api-monitoring-location-properties-example.json
- aid: u-s-geological-survey:u-s-geological-survey-citations-api
  name: U.S. Geological Survey Citations API
  description: Citations associated with water measurement methods.
  humanURL: https://www.usgs.gov/tools/asset-identifier-service-ais
  baseURL: https://earthquake.usgs.gov/fdsnws/event/1
  tags:
  - Citations
  tags_raw:
  - citations
  properties:
  - type: OpenAPI
    url: openapi/u-s-geological-survey-citations-api-openapi.yml
  - type: Conformance
    url: conformance/u-s-geological-survey-conformance.yml
  - type: Documentation
    url: https://earthquake.usgs.gov/fdsnws/event/1/
  - type: GettingStarted
    url: https://earthquake.usgs.gov/earthquakes/feed/
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/json-schema/usgs-earthquake-api-earthquake-properties-schema.json
  - type: JSONLD
    url: https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/json-ld/usgs-earthquake-api-context.jsonld
  - type: Examples
    url: https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/examples/usgs-earthquake-api-earthquake-properties-example.json
  - type: Documentation
    url: https://api.waterdata.usgs.gov/docs/
  - type: Authentication
    url: https://api.waterdata.usgs.gov/signup/
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/json-schema/usgs-water-data-api-monitoring-location-properties-schema.json
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/json-schema/usgs-water-data-api-time-series-properties-schema.json
  - type: JSONLD
    url: https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/json-ld/usgs-water-data-api-context.jsonld
  - type: Examples
    url: https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/examples/usgs-water-data-api-monitoring-location-properties-example.json
- aid: u-s-geological-survey:u-s-geological-survey-combined-metadata-api
  name: U.S. Geological Survey Combined Metadata API
  description: This endpoint combines metadata from timeseries and field measurements collections by site.
  humanURL: https://www.usgs.gov/tools/asset-identifier-service-ais
  baseURL: https://earthquake.usgs.gov/fdsnws/event/1
  tags:
  - combined-metadata
  properties:
  - type: OpenAPI
    url: openapi/u-s-geological-survey-combined-metadata-api-openapi.yml
  - type: Conformance
    url: conformance/u-s-geological-survey-conformance.yml
  - type: Documentation
    url: https://earthquake.usgs.gov/fdsnws/event/1/
  - type: GettingStarted
    url: https://earthquake.usgs.gov/earthquakes/feed/
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/json-schema/usgs-earthquake-api-earthquake-properties-schema.json
  - type: JSONLD
    url: https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/json-ld/usgs-earthquake-api-context.jsonld
  - type: Examples
    url: https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/examples/usgs-earthquake-api-earthquake-properties-example.json
  - type: Documentation
    url: https://api.waterdata.usgs.gov/docs/
  - type: Authentication
    url: https://api.waterdata.usgs.gov/signup/
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/json-schema/usgs-water-data-api-monitoring-location-properties-schema.json
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/json-schema/usgs-water-data-api-time-series-properties-schema.json
  - type: JSONLD
    url: https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/json-ld/usgs-water-data-api-context.jsonld
  - type: Examples
    url: https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/examples/usgs-water-data-api-monitoring-location-properties-example.json
- aid: u-s-geological-survey:u-s-geological-survey-continuous-api
  name: U.S. Geological Survey Continuous API
  description: Continuous data are collected via automated sensors installed at a monitoring location. They are collected
    at a high frequency and often at a fixed 15-minute interval. Depending on the specific monitoring location, the data may
    be transmitted automatically via telemetry and be available on WDFN within minutes of collection, while other times the
    delivery of data may be delayed if the monitoring location does not have the capacity to automatically transmit data.
    Continuous data are described by parameter name and parameter code (pcode). These data might also be referred to as "instantaneous
    values" or "IV".
  humanURL: https://www.usgs.gov/tools/asset-identifier-service-ais
  baseURL: https://earthquake.usgs.gov/fdsnws/event/1
  tags:
  - continuous
  properties:
  - type: OpenAPI
    url: openapi/u-s-geological-survey-continuous-api-openapi.yml
  - type: Conformance
    url: conformance/u-s-geological-survey-conformance.yml
  - type: Documentation
    url: https://earthquake.usgs.gov/fdsnws/event/1/
  - type: GettingStarted
    url: https://earthquake.usgs.gov/earthquakes/feed/
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/json-schema/usgs-earthquake-api-earthquake-properties-schema.json
  - type: JSONLD
    url: https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/json-ld/usgs-earthquake-api-context.jsonld
  - type: Examples
    url: https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/examples/usgs-earthquake-api-earthquake-properties-example.json
  - type: Documentation
    url: https://api.waterdata.usgs.gov/docs/
  - type: Authentication
    url: https://api.waterdata.usgs.gov/signup/
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/json-schema/usgs-water-data-api-monitoring-location-properties-schema.json
  - type: JSONSchema
 

# --- truncated at 32 KB (101 KB total) ---
# Full source: https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/apis.yml

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