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The verified data layer for AI

The world's data, one question away.

AI agents hallucinate numbers. Starwell fixes that: the world's official statistics, harmonized into one REST API and one MCP server. Every value cites the official table it came from.

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agents: POST /v1/answer · "compare inflation across four economies" · computed · cited

Cross-source analysis · liveVerified

Inflation, four economies, one question.

4.2%<br>1.6%

Jul 2024Jul 2026

United StatesU.S. Bureau of Labor Statistics · 12-mo change of CPI-U, computed<br>3.3%Jul 2026

CanadaStatistics Canada · 12-mo change of all-items CPI, computed<br>3.0%Jul 2026

Euro areaEuropean Central Bank · HICP annual rate, as published<br>2.9%Jul 2026

United KingdomUK Office for National Statistics · CPI annual rate, as published<br>2.9%Jul 2026

Rates marked computed are 12-month changes derived from each agency's published index. Each figure carries its own reference period.

Join agencies in one question, on every plan including free. Ask one.

Agents join these in one call: POST /api/starwell/v1/answer docs &rarr;

29 Official sources · more coming every week

96,589 Datasets indexed

55,172,334,318 Data points

● Counts as of August 2026. Browse the catalog.

The sources

29 official sources, and counting.

Each source keeps its own authority, license, attribution and terms.

World Bank Open Data (World Development Indicators)<br>The World Bank Group<br>29,490 datasets · 26,200,020 data points

Eurostat (EU statistics dissemination API)<br>Eurostat (the statistical office of the European Union)<br>6,751 datasets · 6,158,053,052 data points

ILOSTAT (International Labour Organization)<br>International Labour Organization<br>1,958 datasets · 422,997,547 data points

Statistics Canada<br>Government of Canada<br>8,226 datasets · 35,183,463,817 data points

U.S. Bureau of Economic Analysis Data API (NIPA)<br>U.S. Bureau of Economic Analysis<br>607 datasets · 8,413 stored values

Australian Bureau of Statistics Data API<br>Australian Bureau of Statistics<br>1,226 datasets · 2,120 stored values

Explore all 29 sources in the catalog &rarr;

Every response states its license.

The response

Every response looks like this.

The value and the record behind it, down to the citation.

curl "https://starwell.dev/api/starwell/v1/sources/fred/series/DGS10/observations?latest=1"<br>Copy

DGS10 = 4.72% (2026-08-17)passingFederal Reserve Economic Data (FRED)

"success": true,<br>"data": [<br>"period": "2026-08-17",<br>"value": 4.72,<br>"status": "normal",<br>"decimals": null,<br>"revision": 1,<br>"provenance": {<br>"sourceUrl": "https://api.stlouisfed.org/fred/series/observations?series_id=DGS10&observation_start=1962-01-02&observation_end=2026-08-17&file_type=json&api_key=REDACTED",<br>"retrievedAt": "2026-08-19T06:02:52.784+00:00",<br>"connectorVersion": "1.0.0",<br>"releaseTime": null<br>],<br>"meta": {<br>"series": {<br>"externalId": "DGS10",<br>"indicator": "Market Yield on U.S. Treasury Securities at 10-Year Constant Maturity, Quoted on an Investment Basis",<br>"unit": "Percent",<br>"frequency": "daily",<br>"geography": "United States"<br>},<br>"verification": {<br>"status": "passing",<br>"lastVerifiedAt": "2026-08-19T06:03:43.003+00:00"<br>},<br>"license": {<br>"code": "public-domain",<br>"url": "https://fred.stlouisfed.org/legal/",<br>"attribution": "Source: U.S. federal statistical agencies via FRED, Federal Reserve Bank of St. Louis. This product uses the FRED API but is not endorsed or certified by the Federal Reserve Bank of St. Louis.",<br>"redistributable": true,<br>"trainingEligible": true<br>},<br>"citation": {<br>"source": "Federal Reserve Economic Data (FRED)",<br>"authority": "Federal Reserve Bank of St. Louis",<br>"dataset": "H.15 Selected Interest Rates",<br>"datasetExternalId": "18",<br>"url": "https://fred.stlouisfed.org/release?rid=18",<br>"termsUrl": "https://fred.stlouisfed.org/legal/",<br>"text": "H.15 Selected Interest Rates. Federal Reserve Bank of St. Louis. https://fred.stlouisfed.org/release?rid=18"<br>},<br>"returned": 1,<br>"hasMore": true<br>A real response from the API.

How it works

Ingest, verify, serve.

01 · Ingest

Official releases, one shape

Connectors pull each agency's official releases on schedule and normalize periods, units and revisions. A new source ships only after its tests pass.

02 · Verify

Checked against the source

119 flagship indicators are re-read live from the source agency on a schedule and compared, value for value.

03 · Serve

Provenance on every value

REST and MCP, same store. Every value carries its provenance, its license and a citation.

The toolkit

What a key unlocks.

&rarr;REST API<br>Versioned /v1: sources, datasets, series, observations, computed answers. OpenAPI 3.1 at /openapi.json.

&rarr;MCP server<br>11 tools over Streamable HTTP: search the catalog, fetch observations, compute answers, manage monitors.

&rarr;Computed answers<br>Ask in plain English. The result cites the data points it used.

&rarr;CSV...