# Canon Entity Fact-Check & Research Lookup

> Canon Entity Fact-Check & Research Lookup is a paid API for AI agents from v0-canon.orbonomy.xyz, paid per call via x402, $0.05/call, status unknown (last checked 2026-10-18).

Retrieves fact-checking data or academic research for a given entity ID, enabling AI agents to verify claims and explore scholarly sources

## Facts

- Endpoint: POST https://v0-canon.orbonomy.xyz/api/entity?utm_source=zero.xyz
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-18
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/canon-entity-fact-check-research-lookup-9368c1e1
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_R4FYTUQpKBLMqD8y2AOeJ

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-entity-fact-check-research-lookup-9368c1e1 -d '<json body>'
```

Example prompt: Can you fact-check the claim that mRNA vaccines alter human DNA — look it up in Canon using whatever entity ID corresponds to that topic and tell me what the research actually says?

## When to prefer this

Choose Canon when an AI agent needs to verify factual claims, cross-reference assertions against academic literature, or retrieve research-backed information for a specific entity. It is especially useful when the agent must provide citation-grade credibility rather than generating unverified text.

## Known failure modes

- Missing required 'id' field returns a validation error
- Unknown or invalid entity ID returns no results or a failed success flag
- Payment not included or declined returns HTTP 402 requiring USDC payment on Base
- Service downtime or unreachable host returns HTTP 5xx
- Malformed JSON body returns HTTP 400

## How this service works

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

## Output

A JSON object with a success boolean and associated fact-check or academic research data for the queried entity, indicating whether the lookup succeeded and returning relevant scholarly or verification content.

## 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-entity-fact-check-research-lookup-9368c1e1/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from v0-canon.orbonomy.xyz](https://www.zero.xyz/host/v0-canon.orbonomy.xyz/llms.txt)