# Canon – Fact-Checking & Academic Research API

> Canon – Fact-Checking & Academic Research API is a paid API for AI agents from vert.orbonomy.xyz, paid per call via x402, $0.05/call, status unknown (last checked 2026-10-21).

Retrieves a timeline of facts, papers, and references for a given topic to support fact-checking and academic research by AI agents

## Facts

- Endpoint: POST https://vert.orbonomy.xyz/api/timeline?utm_source=zero.xyz
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/canon-fact-checking-academic-research-api-a1ef6ad8
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_uW9AWM7BzuzzzT0n0pibY

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 canon-fact-checking-academic-research-api-a1ef6ad8 -d '<json body>'
```

Example prompt: Can you fact-check the claim that 'coffee consumption reduces the risk of type 2 diabetes' and pull together a research timeline of academic papers and evidence on the topic?

## When to prefer this

Choose this endpoint when an AI agent needs to verify factual claims or gather academic/scholarly evidence on a topic with payment via USDC on Base. It is particularly suited for research workflows where credibility and citation of sources matter, as opposed to general web search or unverified content retrieval.

## Known failure modes

- Missing required 'topic' field returns a validation error
- Topic string too vague or ambiguous may return sparse or empty timeline
- Payment failure (insufficient USDC balance) results in 402 Payment Required
- Service unavailable or upstream research provider down returns 5xx error
- Very niche or newly emerging topics may return no matching academic results

## How this service works

Fact-checking and academic research for AI agents. Verify claims, search papers, explore journals. USDC on Base.

## Output

Returns a JSON object with a success boolean and a timeline of relevant facts, academic papers, and journal references associated with the queried topic, enabling the agent to verify claims or surface scholarly evidence.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "topic"
 ],
 "properties": {
  "topic": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "success": {
   "type": "boolean"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/canon-fact-checking-academic-research-api-a1ef6ad8/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from vert.orbonomy.xyz](https://www.zero.xyz/host/vert.orbonomy.xyz/llms.txt)