# NCBI dbVar Structural Variant Search via E-utilities

> NCBI dbVar Structural Variant Search via E-utilities is a paid API for AI agents from clonecho.builda.company, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-14).

Searches NCBI dbVar database for structural variants matching a query string and returns matching UIDs via the NCBI E-utilities API.

## Facts

- Endpoint: POST https://clonecho.builda.company/x402/s/ncbi-esearch-dbvar
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/ncbi-dbvar-structural-variant-search-via-e-utilities-f9d45d49
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Rl9tJtp60u1ghHMNwCAP8

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability ncbi-dbvar-structural-variant-search-via-e-utilities-f9d45d49 -d '<json body>'
```

Example prompt: Search NCBI dbVar for structural variants related to BRCA1 and give me the matching UIDs.

## When to prefer this

Use this endpoint when you need to programmatically search NCBI's dbVar database for structural genomic variants (such as CNVs, inversions, deletions, or insertions) by keyword, gene name, or other query term and retrieve the corresponding NCBI UIDs for further lookup or downstream processing.

## Known failure modes

- Empty result set if query matches no dbVar records
- Invalid or malformed query string returns error or zero results
- NCBI E-utilities rate limiting or temporary unavailability
- Network timeout on NCBI backend
- Query too broad returns truncated UID list

## How this service works

Search NCBI dbVar structural variants and return matching UIDs for query {q} via E-utilities. Query: ?q= Returns JSON.

## Output

A JSON object containing a list of NCBI UIDs corresponding to structural variant records in dbVar that match the provided query string, returned via the NCBI E-utilities esearch interface.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/ncbi-dbvar-structural-variant-search-via-e-utilities-f9d45d49/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from clonecho.builda.company](https://www.zero.xyz/host/clonecho.builda.company/llms.txt)