slashyear - sourced history

Connect Remote server

claude mcp add --transport http mcp https://slashyear.com/mcp

{
  "mcpServers": {
    "mcp": {
      "url": "https://slashyear.com/mcp"
    }
  }
}

{
  "servers": {
    "mcp": {
      "type": "http",
      "url": "https://slashyear.com/mcp"
    }
  }
}

Settings > Connectors > Add custom connector
URL: https://slashyear.com/mcp

Tools 16 found in our last check

• search_history

  Full-text search across every dated entry in the historical record, plus the subjects that match. Each entry is a sentence quoted verbatim from a numbered English Wikipedia revision and carries that revision id, so an answer built on it can cite a source that will still say the…

• get_year

  Everything the record holds for one year: the headline summary and every dated entry, grouped by subject, each with its source revision.

• get_day

  One calendar day across every recorded year — what happened on 4 July in all of them. This aggregate exists in no single encyclopedia article.

• get_timeline

  One subject's whole record in date order: every dated entry across all years in which Wikipedia's editors linked to it, with its Wikidata id for joining to other datasets.

• get_country

  One country's dated record, century by century, harvested from the per-country year articles English Wikipedia writes separately ('1969 in Japan') and never indexes together. Use this when the question is about a nation rather than a year or a subject.

• get_year_facts

  What a year (1800-2025) looked like in numbers, from outside sources rather than encyclopedia prose: world population, U.S. CPI and what a dollar then is worth now, average U.S. prices (gas, eggs, bread, milk, houses, income, minimum wage), who led the major powers, and the Bill…

• get_leaders

  Who led a country (or every country) in a year, 1800-2025: heads of state, heads of government and ruling-party leaders, in the order they held the post. Each name is quoted from Wikipedia's list of state leaders (revision id given) and kept only where the person's Wikidata reco…

• get_number_one_song

  The Billboard Hot 100 No. 1 single on a given date (1958-08-04 onward): the first chart issue dated on or after that day, quoted from a cited Wikipedia revision.

• convert_dollars

  Inflation-adjust U.S. dollars between years with the BLS CPI-U (1913 onward). Omit to_year for the latest published month.

• get_world_on_date

  The world on one date in a single answer: the dated entries for that exact day, births and deaths that day, every state's office holders that year, the Billboard Hot 100 No. 1 in force, U.S. prices and CPI, world population, official series (unemployment, rates, GDP, debt, CO2,…

• check_claim

  Check one dated sentence against the record before stating it. Leaders, Billboard No. 1 singles and Nobel Prizes get a structured check that can return 'supported' or 'contradicted' with the source. Other claims are matched against the dated entries and the answer says where the…

• get_nobel_prizes

  Nobel laureates for a year (1901 on) or for a category across years, from the Nobel Prize API and kept only where Wikidata records the same prize in the same year.

• get_official_series

  Official data series by year from the agencies that publish them, each cross-checked against a second copy: U.S. unemployment, federal funds rate, GDP, population, federal debt, Mauna Loa CO2, global temperature anomaly, Fed exchange rates. Omit series to list them.

• get_disagreements

  Where two sources slashyear checks against each other disagree: leaders' terms (Wikipedia lists vs Wikidata), birth and death dates (Wikipedia year articles vs Wikidata), Nobel Prizes (Nobel API vs Wikidata). Useful before trusting either source.

• list_countries

  Browse the countries that have a record of their own, largest first.

• list_subjects

  Browse the subjects that have a timeline, largest record first.

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