# Oracles Unified Change Search

> Oracles Unified Change Search is a paid API for AI agents from oracles-production.up.railway.app, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-15).

Searches across all monitored change feeds simultaneously using a keyword, returning ranked matching changes with per-feed breakdown

## Facts

- Endpoint: GET https://oracles-production.up.railway.app/v1/search
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/oracles-unified-change-search-20d0b7c2
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_CdqMwlAEAp3FkE6oIjA-9

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 oracles-unified-change-search-20d0b7c2
```

Example prompt: Search all the change feeds for anything related to 'fentanyl' — I want to see every recent update across drug recalls, federal rules, and any other feed, ranked by significance.

## When to prefer this

Use this endpoint when you don't know which specific feed a change might appear in, or when you want to cast a wide net across all monitored domains (drug recalls, Federal Register rules, tariff changes, Maven updates, etc.) at once. It's the ideal 'catch-all' first query before drilling into a specific feed.

## Known failure modes

- Missing required 'q' parameter returns 400 error
- No results found for obscure keyword returns empty findings array
- Payment not provided or insufficient results in 402 Payment Required
- Invalid 'since' date format returns 400 error
- Rate limiting or backend timeout returns 503

## How this service works

Cheap unified search across the ENTIRE change corpus (every feed at once): pass ?q=<keyword> and get matching changes ranked by significance, with a per-feed breakdown. Optional since / min_significance / limit / source. The one call to ask 'did anything change about X anywhere?' without knowing which feed to hit.

## Output

A ranked list of matching changes from across all monitored feeds, with per-feed breakdowns indicating which feeds had hits, significance scores for each result, and metadata like source, timestamp, and summary text for each matching change.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "q"
     ],
     "properties": {
      "q": {
       "type": "string"
      },
      "since": {
       "type": "string"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "findings": {
       "type": "array",
       "items": {
        "type": "object"
       }
      },
      "generatedBy": {
       "enum": [
        "llm",
        "template"
       ],
       "type": "string"
      },
      "overallVerdict": {
       "type": "string"
      },
      "packagesAudited": {
       "type": "integer"
      }
     }
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/oracles-unified-change-search-20d0b7c2/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from oracles-production.up.railway.app](https://www.zero.xyz/host/oracles-production.up.railway.app/llms.txt)