# Orbonomy Fact-Check Search

> Orbonomy Fact-Check Search is a paid API for AI agents from backup-v2api.orbonomy.xyz, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-15).

Searches for fact-checking results on a given query string, returning verified claim data up to a specified result limit.

## Facts

- Endpoint: POST https://backup-v2api.orbonomy.xyz/api/factcheck/search
- 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/orbonomy-fact-check-search-d3a4e31a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_eG8PefpcN1J9RzA7cCVrG

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 orbonomy-fact-check-search-d3a4e31a -d '<json body>'
```

Example prompt: Can you fact-check the claim 'vaccines cause autism' for me and return up to 5 results from Orbonomy's fact-check search?

## When to prefer this

Use this endpoint when you need to verify claims, check misinformation, or retrieve fact-checking results for a specific statement or topic. Prefer this over general web search when you need specifically curated fact-check database results rather than raw web content. Best for agents handling misinformation detection, news verification, or content moderation workflows.

## Known failure modes

- Missing required 'query' field returns validation error
- Missing required 'limit' field returns validation error
- Payment failure via x402 protocol returns 402 Payment Required
- Empty result set if no fact-checks exist for the query
- Service unavailable if backup-v2api host is down
- Invalid limit value (non-integer) causes schema validation failure

## How this service works

50+ pay-per-call API endpoints across accommodation, AI, content, fact-checking, and data services. Powered by x402 protocol.

## Output

Returns a JSON object with a success boolean and up to the specified number of fact-check results related to the queried claim, drawn from fact-checking databases.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "limit",
  "query"
 ],
 "properties": {
  "limit": {
   "type": "integer"
  },
  "query": {
   "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/orbonomy-fact-check-search-d3a4e31a/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from backup-v2api.orbonomy.xyz](https://www.zero.xyz/host/backup-v2api.orbonomy.xyz/llms.txt)