# NCBI dbGaP Genotype-Phenotype Study Search (E-utilities)

> NCBI dbGaP Genotype-Phenotype Study Search (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 the NCBI dbGaP genotype-phenotype study database and returns matching study UIDs for a given query string via the NCBI E-utilities API.

## Facts

- Endpoint: POST https://clonecho.builda.company/x402/s/ncbi-esearch-gap
- 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-dbgap-genotype-phenotype-study-search-e-utilities-86b2b10e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_pZ_h60lIfDEyvkFA5F68f

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-dbgap-genotype-phenotype-study-search-e-utilities-86b2b10e -d '<json body>'
```

Example prompt: Search dbGaP on NCBI for genotype-phenotype studies related to type 2 diabetes and give me the matching study UIDs.

## When to prefer this

Use this endpoint when you need to programmatically search the NCBI dbGaP database for genotype-phenotype study records and retrieve their UIDs — particularly useful as a first step before fetching full study metadata. Prefer this over direct NCBI API calls when you need a metered, proxied access point with x402 payment support.

## Known failure modes

- Empty result set if the query matches no dbGaP studies (returns zero UIDs)
- Malformed or overly broad query may return unexpected or irrelevant UIDs
- NCBI E-utilities rate limiting or temporary unavailability causing errors
- Query string not URL-encoded properly leading to request failure
- Payment failure ($0.02 USDC) blocking the request

## How this service works

Search the NCBI dbGaP genotype-phenotype study database and return matching UIDs for query {q} via E-utilities. Query: ?q= Returns JSON.

## Output

A JSON response containing matching dbGaP study UIDs (record identifiers) corresponding to the submitted search query, following the NCBI E-utilities esearch format — typically includes a list of UIDs, result count, and query translation metadata.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/ncbi-dbgap-genotype-phenotype-study-search-e-utilities-86b2b10e/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)