# Tangopedia

> Argentine tango's orchestras, singers, songs and years, from the recordings themselves. Every fact links its source and names the batch it was published in.

## Read

- [Home](https://tangopedia.app/): the year chapters, the years, the most recorded orchestras
- [A page by code](https://tangopedia.app/TOck825n): /<code>, codes match ^T[PDOVSNREBLKXCJGWY][0-9a-z]{6}$
- [A page by kind and slug](https://tangopedia.app/orchestras/juan-d-arienzo): /orchestras, /singers, /songs, /people, /recordings
- [A year](https://tangopedia.app/years/1940): /years/<year>
- [Search](https://tangopedia.app/search?q=troilo)

## Machines

- [MCP server](https://tangopedia.app/mcp): Streamable HTTP, read-only, no account. Tools: search, resolve, passages, ask, get_entity, get_history, get_era, get_decade, get_year, list_claims, get_sources, get_lyrics, ask_truth, get_claim_group, get_article, get_changes, report_problem, get_dancer, get_event, get_venue, related, tonight, wanted_sources, listen_url. Every result has source_url, batch_id and retrieved_at.
- [Terms for AI and machines](https://tangopedia.app/ai): attribution, licences, rate limits, contact
- [Sitemap](https://tangopedia.app/sitemap.xml)
- [OpenAPI](https://tangopedia.app/openapi.json): the JSON API, GET /api/v1/pedia/<code> and /api/v1/pedia/<kind>/<slug>
- [Ask truth](https://tangopedia.app/api/v1/truth?q=who+sang+bahia+blanca): GET /api/v1/truth?subject=<code|name>&predicate=<p>&at=<date>&place=<code> (or q=<question>), and MCP ask_truth. Contract v1.2 ask.truth.v1: every value the sources give, ranked, with claim ids and evidence; status single, agreed, disputed, resolved_by_admin or no_answer. Predicates (v5, 52): arranged_by, arranged_for, arrived_in, audio_feature, born_in, born_on, broadcast_on, catalogue_number, commented_on, composed_by, credited_on, dance_style, danced_at, danced_to, debut_recording, depicted_in, described_as, died_in, died_on, dj_at, duration, edition_of, era, era_membership, external_id, features_tango, filmed_at, genre, glossary_meaning, held_at, in_lineup, influenced, joined, judged, last_recording, led, led_by, left, located_in, lyrics_by, matrix_number, mentioned_in, named_for, occurred_at, open_from, open_until, organised_by, partnered_with, performed_at, placed_in, played_in, played_tanda, plays_instrument, premiered_at, published_at, quoted_in, recorded_in, reissue_of, released_by, released_on_label, same_person_as, sang_with, schedule_night, signature_recording, sourced_from, studied_with, sung_by, take_of, taught_at, transfer_of, used_in_lyric, won

## Search well

- A name, nickname or misspelling: GET /api/v1/pedia/resolve?name=pichuco (MCP resolve) gives codes, best first, with confidence exact, partial or near; then read the page by code.
- A name with filters: GET /api/v1/pedia/search?q=troilo+fiorentino+1941 (MCP search) returns the parse (intent, filters) and the recordings it names. Filters: orchestra or singer, "con"/"with" a singer, a year or decade, tango, vals or milonga, instrumental, "composed by".
- A fact question ("who sang Bahía Blanca?", "when was Di Sarli born?"): ask_truth.
- A question no single fact answers ("what makes Pugliese's sound distinctive?"): GET /api/v1/pedia/ask?q=... (MCP ask) gives the answer card, cited block by block, or the passages that answer it.
- A remembered lyric line or a topic in other words ("a yuyo del suburbio", "why was the Victor orchestra invisible"): GET /api/v1/pedia/passages?q=... (MCP passages), by words and by meaning; cite each passage's source_url.
- As you type: GET /api/v1/pedia/suggest?q=dar.
- English and Spanish both work; accents are optional.

## Use

Cite source_url for any fact you use. A fact retracted with its batch disappears; read again rather than caching for long.