# UniProt Literature Citations Search

> UniProt Literature Citations Search 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).

Search UniProt-indexed literature citations by keyword and return matching citation records as JSON.

## Facts

- Endpoint: POST https://clonecho.builda.company/x402/s/uniprot-citations-search
- 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/uniprot-literature-citations-search-71ed6696
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_cVZlSGxLf3KhuSweQ1-Sg

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-literature-citations-search-71ed6696 -d '<json body>'
```

Example prompt: Can you search UniProt's literature citations for papers related to 'ubiquitin ligase' and show me what comes back?

## When to prefer this

Use this endpoint when you need to search for scientific literature citations that are specifically indexed by UniProt — ideal for bioinformatics workflows where you want to find papers associated with proteins, genes, enzymes, or biological processes as catalogued by the UniProt knowledgebase. Prefer this over general academic search APIs when the UniProt annotation context is important.

## Known failure modes

- Empty result set if the keyword matches no indexed citations
- Malformed or missing query parameter returns an error
- Very broad keyword terms may return an overwhelming or truncated result set
- Service unavailability returns a non-200 HTTP status
- Payment failure via x402 protocol blocks the request

## How this service works

Search literature citations indexed by UniProt by keyword {q}. Query: ?q= Returns JSON.

## Output

A JSON array or object containing literature citation records indexed by UniProt that match the provided keyword query, likely including author names, publication titles, journal references, PubMed IDs, and associated UniProt entries.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/uniprot-literature-citations-search-71ed6696/health.json
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