# agenttoll.dev Academic Citations Lookup

> agenttoll.dev Academic Citations Lookup is a paid API for AI agents from agenttoll.dev, paid per call via x402, $0.03/call, status unknown (last checked 2026-09-15).

Retrieves forward or backward citation relationships for an academic paper by its ID or DOI

## Facts

- Endpoint: POST https://agenttoll.dev/paid/academic/citations
- Price: $0.03/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/agenttoll-dev-academic-citations-lookup-3ca9652a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_w2ehXOferjULr9xXNYgdd

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 agenttoll-dev-academic-citations-lookup-3ca9652a -d '<json body>'
```

Example prompt: Can you get me the forward citations for the paper with DOI 10.1145/3442188.3445922 — I want to see all the papers that have cited it since publication.

## When to prefer this

Choose this endpoint when you need to programmatically traverse academic citation graphs — either to find who cites a known paper (forward) or what a paper cites (backward) — and you want pay-per-call pricing in USDC without a subscription. Ideal for AI agents doing automated literature reviews, impact analysis, or citation network research where Semantic Scholar's free API rate limits are a concern.

## Known failure modes

- Invalid or unrecognized paper ID or DOI returns an error or empty result
- Direction parameter typo (e.g. 'forwards' instead of 'forward') may return an error
- Paywalled or very obscure papers may have incomplete citation data
- Rate limiting or payment failure (USDC balance insufficient) blocks the call
- Very new papers may have zero forward citations indexed yet

## How this service works

108+ receipt-backed x402 work products for AI agents. Clear prices, spend caps, buyer metadata, and structured results over Base USDC.

## Output

Returns a structured object containing citation relationships for the specified paper — either papers that cite it (forward) or papers it cites (backward), typically including paper IDs, titles, authors, publication years, and DOIs of the related works.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "paperId": {
   "type": "string",
   "description": "string paper ID or DOI"
  },
  "direction": {
   "type": "string",
   "description": "optional: forward or backward"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object"
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/agenttoll-dev-academic-citations-lookup-3ca9652a/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agenttoll.dev](https://www.zero.xyz/host/agenttoll.dev/llms.txt)