{
  "generated": "2026-08-30",
  "method": "searched",
  "source": "https://www.tycho.pitt.edu/dataset/api/ (HTTP 200, 2026-08-30) — the University of Pittsburgh's own published API reference. The request examples below are transcribed from that page; the response bodies are NOT included because every Project Tycho call requires an API key and API Evangelist holds none.",
  "provider": "University of Pittsburgh",
  "providerId": "university-of-pittsburgh",
  "api": "university-of-pittsburgh:project-tycho",
  "operator": "institution",
  "baseURL": "https://www.tycho.pitt.edu/api",
  "authentication": "apikey query parameter, obtained free from the Profile page after registering at https://www.tycho.pitt.edu",
  "examples": [
    {
      "name": "List every condition",
      "request": "GET https://www.tycho.pitt.edu/api/condition?apikey=APIKEY",
      "returns": "CSV — ConditionName, ConditionSNOMED",
      "provenance": "documented"
    },
    {
      "name": "Look up the SNOMED code for a known condition",
      "request": "GET https://www.tycho.pitt.edu/api/condition?apikey=APIKEY&ConditionName=Measles",
      "returns": "CSV — one row",
      "provenance": "documented"
    },
    {
      "name": "List first-level divisions of the United States",
      "request": "GET https://www.tycho.pitt.edu/api/admin1?apikey=APIKEY&CountryISO=US",
      "returns": "CSV — CountryISO, CountryName, Admin1ISO, Admin1Name",
      "provenance": "documented"
    },
    {
      "name": "Measles counts in Pennsylvania, excluding cumulative series and fatalities",
      "request": "GET https://www.tycho.pitt.edu/api/query?apikey=APIKEY&ConditionName=Measles&CountryISO=US&Admin1ISO=US-PA&Fatalities=0&PartOfCumulativeCountSeries=0",
      "returns": "CSV in Project Tycho Pre-compiled Data Format v1.0, first 5000 rows",
      "provenance": "documented"
    },
    {
      "name": "Page 2 of the same query",
      "request": "GET https://www.tycho.pitt.edu/api/query?apikey=APIKEY&ConditionName=Measles&CountryISO=US&Admin1ISO=US-PA&Fatalities=0&PartOfCumulativeCountSeries=0&offset=5000",
      "returns": "CSV, rows 5001-10000. An offset past the end returns the literal text \"No results\".",
      "provenance": "documented"
    },
    {
      "name": "Dengue in Laos over a date range",
      "request": "GET https://www.tycho.pitt.edu/api/query?apikey=APIKEY&ConditionName=Dengue&CountryName=LAO%20PEOPLE'S%20DEMOCRATIC%20REPUBLIC&PeriodStartDate>=2000-01-01&PeriodEndDate<=2003-12-31",
      "returns": "CSV. Note that the comparison operator is written into the query string itself rather than passed as a separate parameter.",
      "provenance": "documented"
    },
    {
      "name": "Raise the page size to the documented maximum",
      "request": "GET https://www.tycho.pitt.edu/api/query?apikey=APIKEY&ConditionName=Measles&CountryISO=US&Admin1ISO=US-NY&Fatalities=0&limit=10000",
      "returns": "CSV, first 10000 rows. Default limit is 5000, maximum 20000.",
      "provenance": "documented"
    }
  ],
  "observed_responses": [
    {
      "name": "Rejected credential",
      "request": "GET https://www.tycho.pitt.edu/api/condition?apikey=INVALIDKEY",
      "status": 200,
      "content_type": "text/html",
      "body": "Invalid API key. Please see the <a href=\"/dataset/api\">API Help</a> (https://www.tycho.pitt.edu/dataset/api) for more information.",
      "provenance": "probed 2026-08-30"
    },
    {
      "name": "Rejected credential on a path that does not exist",
      "request": "GET https://www.tycho.pitt.edu/api/nonsensepath?apikey=INVALIDKEY",
      "status": 200,
      "content_type": "text/html",
      "body": "Invalid API key. Please see the <a href=\"/dataset/api\">API Help</a> (https://www.tycho.pitt.edu/dataset/api) for more information.",
      "provenance": "probed 2026-08-30",
      "note": "Byte-identical to the previous response. The key is evaluated before the path is routed, so no path in this API can be confirmed to exist without a credential — which is why the OpenAPI in this repository rests on the published documentation rather than on probes."
    }
  ]
}