OptiSift Workspace
Compare golf carts on top speed, range, battery, power, and price across major manufacturers.
Workspace source registry
Search the shared registry, inspect rights and joins, then take a ready connector into the Guided Dataset Builder for preview and approval.
43
free-path sources
12
ready connectors
7
download & map
24
discovery leads
Search for what you need to measure. Every result states what OptiSift can do with it and what you must verify before reuse.
43 sources
A match is a lead—not permission or automatic approval.
JSONPlaceholder
Ten fake user profiles — a safe way to try imports and pulls.
Rights: Synthetic demonstration data; not for factual decisions.
Credit: jsonplaceholder.typicode.com · free fake API
Join using: username, email
CoinGecko
Top coins by market cap with price, volume, and supply columns.
Rights: Attribution and API-plan terms apply.
Credit: CoinGecko free API · attribution required
Join using: asset id, symbol
CoinPaprika
Coin tickers with rank, supply, and beta — no key required.
Rights: API-plan and redistribution terms require review.
Credit: api.coinpaprika.com · free tier
Join using: asset id, symbol
USAspending.gov
US federal agencies with budgetary resources and spend shares.
Rights: U.S. federal government spending data; preserve source attribution.
Credit: api.usaspending.gov · public domain
Join using: toptier_code, agency abbreviation
U.S. Government Publishing Office
US Government Publishing Office collections with package counts.
Rights: Collection contents may carry document-specific rights or notices.
Credit: api.govinfo.gov (usgpo) · api.data.gov key
Join using: collection_code
National Highway Traffic Safety Administration
US-market vehicle models for a make and model year — free, keyless, public domain. Seeds the item list; specs come from enrichment.
Rights: U.S. government vehicle reference data; retain NHTSA attribution.
Credit: vpic.nhtsa.dot.gov · NHTSA public API
Join using: make name, model name, model year
U.S. General Services Administration
Discovery metadata and resource links for U.S. government datasets.
Rights: The catalog is metadata; each linked dataset and distribution must be reviewed separately.
Credit: Data.gov and the publishing agency
Join using: dataset identifier, publisher-specific identifiers
Participating governments and organizations
Searchable city, county, state, nonprofit, and agency open-data catalogs.
Rights: Terms, attribution, and reuse rights belong to each publishing portal and dataset.
Credit: Publishing portal and dataset owner
Join using: dataset identifier, FIPS, agency-specific identifiers
U.S. Census Bureau
Population, housing, demographic, business, trade, and economic datasets.
Rights: Review Census terms and attribution requirements for the selected dataset and geography.
Credit: U.S. Census Bureau
Join using: FIPS, NAICS, Census geography, vintage
World Bank
Long-running country and regional indicators across development, finance, health, and infrastructure.
Rights: Indicator metadata identifies source organizations; downstream terms may vary by series.
Credit: World Bank and the indicator's source organization
Join using: ISO country code, indicator code, year
OurResearch
Scholarly works, authors, institutions, topics, sources, and funders.
Rights: Review API terms and the rights of linked works; bibliographic metadata is not permission to redistribute full text.
Credit: OpenAlex and underlying scholarly sources
Join using: OpenAlex ID, DOI, ORCID, ROR
Federal Reserve Bank of St. Louis
Economic time series and historical vintages from U.S. and international source agencies.
Rights: FRED terms apply and individual series can carry source-specific rights or restrictions.
Credit: FRED and the series' original source
Join using: FRED series ID, date, vintage date
U.S. Bureau of Labor Statistics
Published employment, wages, prices, productivity, injuries, and labor-market time series.
Rights: Public U.S. statistical data; preserve BLS series definitions, footnotes, and attribution.
Credit: U.S. Bureau of Labor Statistics
Join using: BLS series ID, year, period
U.S. Bureau of Economic Analysis
GDP, income, trade, industry, regional, and international economic accounts.
Rights: Official U.S. economic statistics; retain BEA attribution and dataset notes.
Credit: U.S. Bureau of Economic Analysis
Join using: BEA dataset, table, line code, geography, year
U.S. Energy Information Administration
Energy production, consumption, prices, reserves, electricity, and emissions data.
Rights: Official U.S. energy statistics; API terms apply and source attribution should be retained.
Credit: U.S. Energy Information Administration
Join using: EIA route, series, period, geography
U.S. Securities and Exchange Commission
Company submissions and standardized XBRL financial-statement facts, with nightly bulk archives.
Rights: Public filing data; automated access must follow SEC fair-access and identification policies.
Credit: U.S. Securities and Exchange Commission EDGAR
Join using: CIK, taxonomy, XBRL concept, fiscal period, accession number
Centers for Medicare & Medicaid Services
Public health-care provider, quality, utilization, payment, and coverage datasets.
Rights: Public CMS datasets; review each dataset dictionary, suppression rules, and attribution notes.
Credit: Centers for Medicare & Medicaid Services
Join using: CMS certification number, NPI, measure ID, FIPS
NOAA National Centers for Environmental Information
Weather and climate observations, stations, locations, and dataset metadata.
Rights: Official U.S. environmental observations; retain NOAA/NCEI attribution and quality flags.
Credit: NOAA National Centers for Environmental Information
Join using: station ID, location ID, datatype ID, date
U.S. Geological Survey
Real-time and historical water measurements plus monitoring-location and time-series metadata.
Rights: Official U.S. scientific data; retain USGS attribution, qualifiers, and provisional-data notices.
Credit: U.S. Geological Survey
Join using: monitoring location ID, parameter code, time series ID, timestamp
European Commission, Eurostat
Official European statistical data and metadata through catalogue, JSON-stat, and SDMX services.
Rights: Eurostat reuse policy and dataset footnotes apply; keep source, unit, geography, and revision context.
Credit: Eurostat
Join using: dataset code, dimension code, geography, time period
Wikimedia Foundation and Wikidata community
General-purpose linked entities and statements with references, stable identifiers, APIs, and SPARQL.
Rights: Structured Wikidata is CC0; individual statements can still require source-quality review.
Credit: Wikidata (requested as a data-origin courtesy)
Join using: Wikidata QID, property ID, external identifier
Harvard Institute for Quantitative Social Science and dataset depositors
Published research datasets with searchable metadata, persistent identifiers, citations, and files.
Rights: Each deposited dataset controls its own license, citation, access, and file restrictions.
Credit: Dataset authors, citation, DOI, and Harvard Dataverse
Join using: DOI, persistent ID, dataset ID, file ID
Hugging Face and dataset publishers
Machine-learning and general datasets with searchable cards, previews, schemas, Croissant metadata, and files.
Rights: License, provenance, quality, and gating are dataset-specific; a public card is not proof of reuse rights.
Credit: Dataset publisher and Hugging Face repository
Join using: repository ID, revision, configuration, split
National Aeronautics and Space Administration
A catalog of public space, Earth observation, astronomy, and mission APIs.
Rights: NASA media, partner data, and individual services can have distinct rights and attribution rules.
Credit: NASA and the named mission or data provider
Join using: mission ID, object ID, observation date, event ID
U.S. Environmental Protection Agency
Environmental facilities, air, water, waste, toxics, radiation, compliance, and geographic data across EPA systems.
Rights: Official U.S. environmental data; retain EPA system metadata, qualifiers, update context, and attribution.
Credit: U.S. Environmental Protection Agency and the named source system
Join using: EPA facility ID, program ID, substance ID, FIPS, ZIP code
Organisation for Economic Co-operation and Development
Comparable international statistics and metadata across economies, education, taxation, trade, health, and policy.
Rights: OECD terms and dataset notes apply; retain dataset, dimension, unit, and organization attribution.
Credit: OECD and the named dataset producer
Join using: agency ID, dataset ID, dimension code, geography, time period
Crossref and member publishers
Open DOI, work, journal, funder, license, update, ORCID, and ROR metadata deposited by publishers and trusted sources.
Rights: Most metadata is openly reusable; some abstracts and linked content remain publisher- or author-controlled.
Credit: Crossref and the depositing publisher or trusted source
Join using: DOI, ISSN, ORCID, ROR, Crossref member ID
Ecosyste.ms
Open metadata for public code repositories and packages: stars, forks, open issues, last push, license, and npm adoption.
Rights: Data is CC BY-SA 4.0: attribution is required and derived datasets carry the same license.
Credit: Ecosyste.ms (CC BY-SA 4.0)
Join using: repository full name, package name, repository URL
Open-Meteo and named meteorological data providers
Normalized weather forecasts, historical reanalysis, climate, air quality, marine, flood, and elevation APIs.
Rights: Open-access API data is CC BY 4.0 with required attribution; usage limits and commercial plan terms apply.
Credit: Weather data by Open-Meteo.com and the named underlying model provider
Join using: latitude, longitude, time, weather variable, model
Google and indexed dataset publishers
A broad search engine for datasets published across repositories on the web.
Rights: Google indexes metadata but does not grant reuse rights; review the publisher's license and repository terms for every result.
Credit: Original dataset publisher and repository; discovery via Google Dataset Search
Join using: dataset identifier, repository URL, publisher identifiers
University of California, Irvine
Curated machine-learning datasets with files, task metadata, variable descriptions, citations, and persistent identifiers.
Rights: UCI states deposited datasets use CC BY 4.0; retain each dataset's DOI and requested citation and review any dataset-specific notes.
Credit: Dataset creators, dataset DOI, and the UCI repository
Join using: dataset DOI, dataset ID, record identifier, feature name
Data Is Plural and the linked dataset publishers
A curated newsletter and searchable archive of useful, unusual, and newly released datasets.
Rights: The archive points to third-party datasets and is not a blanket license; verify the original publisher, provenance, and reuse terms.
Credit: Original dataset publisher; discovery via Data Is Plural when useful
Join using: archive entry, source URL, publisher identifiers
OpenIntro
Teaching-ready statistics datasets with browsable documentation and CSV, TSV, and R download paths.
Rights: Review each dataset's source, documentation, citation, and rights before reuse outside its teaching context.
Credit: OpenIntro and the original source named on the dataset page
Join using: dataset name, record identifier, documented variable
Tableau Public authors and their named data publishers
A public gallery of interactive visualizations that can reveal useful datasets, methods, and publishers.
Rights: Tableau does not own or publish workbook authors' data; download availability and reuse rights vary and must be confirmed with the author or original publisher.
Credit: Workbook author and original data publisher; Tableau Public as host
Join using: workbook URL, author, original dataset identifier
Official model-level Mac specifications, configuration details, compatibility information, and current product comparisons.
Rights: Apple website terms apply. Treat specifications as attributed evidence and do not assume permission to redistribute Apple page content or imagery.
Credit: Apple
Join using: model identifier, chip, memory, storage, screen size
Official iPhone model specifications, feature compatibility, dimensions, storage options, and current product comparisons.
Rights: Apple website terms apply. Attribute specifications to Apple and do not treat product-page content or imagery as openly licensed.
Credit: Apple
Join using: model name, model number, storage tier
Primate Labs
Public browser for uploaded CPU, GPU, and machine-learning benchmark results with device and system metadata.
Rights: Results are user-submitted and Primate Labs terms apply. Verify exact hardware metadata and keep comparisons within the same benchmark major version.
Credit: Geekbench and the individual result record
Join using: benchmark version, model identifier, processor, result id
NVM Express
Official program information and integrator lists for products tested against NVMe specifications.
Rights: NVM Express terms apply. Compliance status verifies specification testing; it does not establish workload performance or consumer reliability.
Credit: NVM Express
Join using: vendor, product name, model number, specification version
smartmontools contributors
Community-maintained device identification and SMART interpretation rules for storage drives.
Rights: smartmontools is GPL-licensed. Preserve the project's license and attribution, and treat device rules as identification metadata rather than performance evidence.
Credit: smartmontools contributors
Join using: model family, model number, firmware, SMART attribute
Backblaze
Downloadable drive-level observations from Backblaze's data-center fleet, including model and failure context.
Rights: Backblaze publishes reuse terms with the dataset. Preserve attribution and do not generalize data-center fleet results into consumer SSD rankings without a fit analysis.
Credit: Backblaze Drive Stats
Join using: model, serial number, date, failure flag
National Telecommunications and Information Administration
Official U.S. survey datasets and explorer covering internet access, device access, and online activities across population groups.
Rights: U.S. government survey data. Preserve NTIA and Census attribution, survey-year definitions, weights, and disclosure controls.
Credit: NTIA Internet Use Survey and U.S. Census Bureau
Join using: survey year, respondent, household, activity, population group
UK Department for Science, Innovation and Technology
Official survey releases on public engagement, awareness, attitudes, and behaviors concerning science and technology.
Rights: Check the release's Open Government Licence and third-party-rights notices. Preserve survey wording, weights, sample notes, and DSIT attribution.
Credit: UK Department for Science, Innovation and Technology
Join using: survey wave, question, population group, response category
Official UK research releases and supporting datasets on device access, online behavior, media use, skills, and safety.
Rights: Ofcom terms and release-specific rights apply. Preserve question wording, base sizes, weighting, uncertainty notes, and Ofcom attribution.
Credit: Ofcom
Join using: survey year, question, population group, device, activity
Agents can search the registry, plan sources per criterion, preview a reviewed connector, and import only after an owner approves the mapping.
GET /api/v1/sources?q={topic}&criterion={criterion}
MCP /api/mcp
sources → plan_dataset → preview_source → import_source
These visual explainers help people judge statistics and models. They are intentionally excluded from the evidence-source count.
Seeing Theory
Understand uncertainty, distributions, and statistical inference before choosing a metric.
archivedR2D3
Build intuition about what a model learns and where its errors come from.
activeSetosa — Explained Visually
Quickly inspect concepts such as distributions, regressions, and model behavior.
activeDistill
Study rigorous visual explanations of model behavior and interpretability.
hiatus