# Canon – Fact-Checking & Academic Research

> Canon – Fact-Checking & Academic Research is a paid API for AI agents from vert.orbonomy.xyz, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-13).

Looks up an entity by ID to verify claims, retrieve academic papers, or explore journal information for AI agents

## Facts

- Endpoint: POST https://vert.orbonomy.xyz/api/entity
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/canon-fact-checking-academic-research-80265db9
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_f9BcFcIfw0bxkK1i_4Vel

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-80265db9 -d '<json body>'
```

Example prompt: Can you look up entity ID 'pubmed-2024-climate-attribution-7731' in Canon and tell me whether the underlying claim checks out against the academic record?

## When to prefer this

Choose this endpoint when an AI agent needs to verify a factual claim or retrieve academic/research metadata against a curated knowledge base, especially within a workflow that supports x402 micropayments on Base. Prefer it over general web search when you need structured fact-checking output or scholarly source validation tied to a specific entity identifier.

## Known failure modes

- Missing or invalid 'id' field returns a 400-level error
- Entity ID not found in the database returns success:false or a 404
- Payment not included or insufficient USDC (x402) results in a 402 Payment Required response
- Malformed request body causes a schema validation error
- Temporary service unavailability returns a 5xx error

## 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 indicating whether the entity lookup completed; additional fields likely include fact-check verdicts, paper metadata, or journal details depending on the entity queried.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "id"
 ],
 "properties": {
  "id": {
   "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-80265db9/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)