# Homebrew Formula Release Change Tracker

> Homebrew Formula Release Change Tracker is a paid API for AI agents from oracles-production.up.railway.app, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-16).

Returns new releases and breaking changes for Homebrew formula packages since a given timestamp, each tagged and scored by significance.

## Facts

- Endpoint: GET https://oracles-production.up.railway.app/v1/homebrew/changes
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/homebrew-formula-release-change-tracker-95e405dd
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_jRu5CT21DTz3uu8tLGjWQ

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 homebrew-formula-release-change-tracker-95e405dd
```

Example prompt: Check for any new releases or breaking changes to the ffmpeg Homebrew formula since 2025-01-01T00:00:00Z, and only show me changes with a significance score of at least 7.

## When to prefer this

Use this endpoint when you need programmatic, structured, scored change data for specific Homebrew formula packages — especially to detect breaking (major) version bumps. It supports on-demand lookup of any Homebrew formula, not just a pre-tracked list, making it more flexible than static changelog monitors. Prefer it over scraping GitHub releases or Homebrew audit logs directly.

## Known failure modes

- Unknown or misspelled package name — returns empty changes array or fetch error for unresolvable formula
- Invalid ISO-8601 timestamp in 'since' — returns 400 validation error
- Package not yet tracked and live fetch fails (network/upstream issue) — may return partial or error response
- limit out of range (outside 1-500) — returns 400 validation error
- min_significance out of range (outside 1-10) — returns 400 validation error
- Payment not provided or invalid x402 — returns 402 Payment Required

## How this service works

New releases of tracked Homebrew formula packages (git, node, python@3.13, go, and more) on Homebrew (macOS/Linux) since a timestamp — each tagged new_release or breaking_change (major-version bump) with a 1-10 significance score. Answers "did a dependency in my Brewfile / brew upgrade ship a new or breaking version I should pin or upgrade?" Pass ?package=<name> for ANY Homebrew formula package on demand.

## Output

A JSON object containing a count, source label, and an array of change records. Each record includes: entity ID (package name), change type (new_release or breaking_change), a human-readable title and summary, a detail object with version info, a significance score from 1-10, the detected-at timestamp, an effective date, and a primary source URL for verification.

## 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",
     "properties": {
      "limit": {
       "type": "integer",
       "maximum": 500,
       "minimum": 1
      },
      "since": {
       "type": "string",
       "format": "date-time",
       "description": "Only changes detected after this ISO-8601 instant"
      },
      "package": {
       "type": "string",
       "description": "Any Homebrew (macOS/Linux) package name — resolved and fetched live if not already tracked"
      },
      "min_significance": {
       "type": "integer",
       "maximum": 10,
       "minimum": 1,
       "description": "Keep only changes scored at least this"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "count": {
       "type": "integer"
      },
      "source": {
       "type": "string"
      },
      "changes": {
       "type": "array",
       "items": {
        "type": "object",
        "properties": {
         "type": {
          "type": "string"
         },
         "title": {
          "type": "string"
         },
         "detail": {
          "type": "object"
         },
         "summary": {
          "type": "string"
         },
         "entityId": {
          "type": "string"
         },
         "sourceUrl": {
          "type": [
           "string",
           "null"
          ],
          "description": "Primary-source link for verification"
         },
         "detectedAt": {
          "type": "string",
          "format": "date-time"
         },
         "significance": {
          "type": "integer",
          "maximum": 10,
          "minimum": 1
         },
         "effectiveDate": {
          "type": [
           "string",
           "null"
          ]
         }
        }
       }
      }
     }
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/homebrew-formula-release-change-tracker-95e405dd/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)