LAPIS API

Health / No Auth Required Beginner HTTPS CORS

Free to Use

52 D

Metadata Score Metadata estimate · not endpoint-tested

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Overview

LAPIS (Lightweight API for Sequences) provides open access to SARS-CoV-2 genomic sequence data collected from public databases worldwide. It lets you query, filter, and aggregate thousands of viral genome sequences without any authentication. This is ideal for researchers and developers building COVID-19 genomic surveillance tools.

Beginner Tip

Use the /sample/aggregated endpoint with simple filters like country or date to explore the data before diving into raw sequence queries.

Available Data

The kind of data this API exposes, based on its documentation. We could not call the endpoint to confirm the exact field names.

LAPIS data via REST API

Example Response

Illustrative shape only — we were not able to call this endpoint (it requires credentials or exposes no public sample URL), so the fields below show the kind of data this API returns rather than a recorded response.

JSON Response · Illustrative

{
  "status": "success",
  "data": {
    "result": "Data from LAPIS",
    "description": "SARS-CoV-2 genomic sequences from public sources",
    "timestamp": "2025-01-15T10:00:00Z"
  }
}

Field Reference

count Number of sequences matching the query filters.

date Sample collection date in YYYY-MM-DD format.

country Country where the sample was collected.

pangoLineage Pango lineage designation of the viral variant (e.g., BA.2, XBB.1.5).

division Sub-national region or state where the sample was collected.

Implementation Example

Calls a real endpoint of this API. Replace any placeholder credentials with your own key.

Request

const url = "https://lapis.cov-spectrum.org/open/v2/sample/aggregated?country=USA&dateTo=2022-01-01&fields=date,country";
const response = await fetch(url);
if (!response.ok) throw new Error(`Request failed: ${response.status}`);
const data = await response.json();
console.log(data);

What Can You Build?

Note: These code examples are AI-generated and unverified. Always refer to the official API documentation for accurate usage.

Common Errors & Troubleshooting

Generated guidance based on this API's documentation, not observed by us. Treat it as a starting point and check against the provider's own error reference.

Empty result set Filter values may be misspelled or the combination returns no matching sequences

✓ Check spelling of country names (e.g., "United States" vs "USA") and verify date formats are YYYY-MM-DD.

400 Bad Request Invalid query parameter name or unsupported field combination

✓ Refer to the LAPIS documentation for supported filter fields and valid values.

Slow response / timeout Large unfiltered queries on millions of sequences can be slow

✓ Always add at least one filter (e.g., date range or country) to reduce the result size.

Metadata Score Breakdown

Estimated from metadata — endpoint not independently tested

This score is estimated from observable metadata — HTTPS support, authentication model, declared CORS, and documentation reachability — because the API requires authentication or exposes no publicly testable endpoint. The five-signal breakdown is only shown for live-tested APIs.

Metadata estimate · endpoint not independently tested

How is this scored? →