# DTA — Data Terminal & Archive

> A signed, source-bound archive of Mongolia's macroeconomic data. Every observation carries an Ed25519 signature and a public passport, so any figure is independently verifiable.

"A State of the Economy" (Макро төлөв) is the flagship analytics view built on this terminal.

## MCP
- POST https://dta.mn/mcp — MCP server (streamable HTTP, JSON): tools about, search_series, get_panel, get_datum, get_movers. Read-only, no auth.

## Data (JSON)
- [Series panel](https://dta.mn/api/panel?codes=mn.cpi.headline.yoy&limit=200): time series by code; comma-separate codes.
- [Datum passport](https://dta.mn/api/datum/): append a {shortid} for one signed value plus its Ed25519 proof.
- [Board (plaintext)](https://dta.mn/api/board.txt): headline dashboard for curl / IoT.
- [Signing key](https://dta.mn/.well-known/urga.pubkey): the Ed25519 public key behind every datum.
- [Frozen keys](https://dta.mn/.well-known/urga.frozen): retired keys; a passport of one verifies only if its digest is in /.well-known/urga.frozen/{keyid}.

## Bulk (CSV, gzip, rebuilt nightly)
- [Manifest](https://dta.mn/bulk): the three files with their bytes, sha256 and rows, signed with the key above.
- [Values](https://dta.mn/bulk/dta-values.csv.gz): every series' value on every date as the record stands, each with the shortid of its passport.
- [Vintages](https://dta.mn/bulk/dta-vintages.csv.gz): every vintage ever signed, revisions and withdrawals included.
- [Series](https://dta.mn/bulk/dta-series.csv.gz): the catalogue: names, units, frequency, source, dates.

## Discover
- [Sitemap](https://dta.mn/sitemap.xml): every series, cluster, and surface.
- [About](https://dta.mn/about): what DTA is and how verification works.

## Verify
Any value -> its /d/{shortid} passport -> check it against the vendor's own table. Reproducible by anyone.