# UniProt Cross-Referenced Databases Search

> UniProt Cross-Referenced Databases Search is a paid API for AI agents from clonecho.builda.company, paid per call via x402, $0.02/call, status down (last checked 2026-09-16).

Search the catalog of databases cross-referenced by UniProt using a keyword query, returning matching database entries as JSON.

## Facts

- Endpoint: POST https://clonecho.builda.company/x402/s/uniprot-databases-search
- Price: $0.02/call
- Payment: x402
- Status: down
- Last checked: 2026-09-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/uniprot-cross-referenced-databases-search-b7a2bc9b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_7kinruHpzUnbcOh1_CQtI

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 uniprot-cross-referenced-databases-search-b7a2bc9b -d '<json body>'
```

Example prompt: Can you search the UniProt cross-referenced databases catalog for entries related to 'pathway' and show me what databases come up?

## When to prefer this

Use this endpoint when you need to discover or identify which external databases are cross-referenced by UniProt matching a particular keyword or topic — ideal for bioinformatics workflows that need to know what databases are available for protein annotation or cross-referencing. Prefer this over a general web search when you specifically need structured UniProt catalog data.

## Known failure modes

- Empty results if no databases match the keyword query
- Missing or empty 'q' parameter returns an error or empty response
- Network timeout if the upstream UniProt catalog is slow
- Invalid or overly broad query may return too many or irrelevant results

## How this service works

Search the catalog of databases cross-referenced by UniProt by keyword {q}. Query: ?q= Returns JSON.

## Output

A JSON array or object listing databases cross-referenced by UniProt that match the keyword query, including database names, categories, and relevant metadata about each cross-referenced resource.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/uniprot-cross-referenced-databases-search-b7a2bc9b/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)