# Canon – Fact-Checking & Academic Research (Timeline)

> Canon – Fact-Checking & Academic Research (Timeline) is a paid API for AI agents from veri.orbonomy.xyz, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-15).

Accepts a topic string and returns a fact-checked, academically-grounded timeline or research summary for that topic, helping AI agents verify claims and explore scholarly literature.

## Facts

- Endpoint: POST https://veri.orbonomy.xyz/api/timeline
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/canon-fact-checking-academic-research-timeline-3d681b9e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_JzUsFqD5xyL0ZifvXVzFr

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-timeline-3d681b9e -d '<json body>'
```

Example prompt: Can you fact-check whether mRNA vaccines alter human DNA and pull together any relevant academic papers or a timeline of research on that topic?

## When to prefer this

Choose Canon when an AI agent needs to verify factual claims against academic literature or produce a research timeline, especially in contexts where USDC micropayment infrastructure (x402 on Base) is already in use and the agent needs a lightweight, pay-per-call fact-checking endpoint without a subscription.

## Known failure modes

- Missing 'topic' field returns a 400 validation error
- Payment not provided or insufficient USDC results in a 402 Payment Required response
- Ambiguous or very broad topic may return low-confidence or sparse results
- Topic with no academic coverage may return empty or minimal source list
- Network timeout if the underlying research database is slow to respond

## 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 (implicitly) fact-checking results, a research timeline, relevant academic sources, and journal references for the queried topic.

## 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-timeline-3d681b9e/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from veri.orbonomy.xyz](https://www.zero.xyz/host/veri.orbonomy.xyz/llms.txt)