# QuietSignal L2BEAT Changes Feed

> QuietSignal L2BEAT Changes Feed is a paid API for AI agents from 83-29-153-50.sslip.io, paid per call via x402, $0.03/call, status down (last checked 2026-09-15).

Returns machine-readable rollup of recent material changes detected from L2BEAT public data, filterable by L2 category

## Facts

- Endpoint: GET https://83-29-153-50.sslip.io/v1/l2beat-changes
- Price: $0.03/call
- Payment: x402
- Status: down
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/quietsignal-l2beat-changes-feed-87b1bb8b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_K6SdFVF1DCM0BRdBHwweN

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 quietsignal-l2beat-changes-feed-87b1bb8b
```

Example prompt: Pull the latest L2BEAT changes for me — show up to 50 results and filter to just rollups so I can see what's shifted recently in the rollup category.

## When to prefer this

Choose this endpoint when you need structured, machine-readable change detection on L2BEAT data without scraping L2BEAT directly — particularly useful for agents monitoring the Layer 2 ecosystem for new rollups, validium reclassifications, or other material project changes. Prefer it over raw web scraping when you need a paid-per-request, pay-as-you-go model via USDC on Base with no API key setup.

## Known failure modes

- No baseline available — baseline_available returns false and changes array is empty if no prior snapshot exists for comparison
- Invalid tab enum value returns a validation error
- Limit out of range (below 1 or above 100) returns a validation error
- HTTP 402 if USDC payment via x402 protocol is not provided or insufficient
- Upstream L2BEAT data temporarily unavailable causing stale or empty results

## How this service works

QuietSignal Public Data: independent, read-only rollup, wallet, opportunity, and developer-data facts for agents, paid per request with USDC over HTTP 402 on Base.

## Output

A JSON object with schema version 'l2beat-changes/v1', a comparison block containing an array of detected changes, a change_count integer, a baseline_available boolean indicating whether a prior snapshot exists for diffing, and a disclaimer about data provenance and commercial redistribution rights.

## 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": [],
     "properties": {
      "tab": {
       "enum": [
        "rollups",
        "validiumsAndOptimiums",
        "others"
       ],
       "type": "string",
       "description": "Optional L2BEAT category filter"
      },
      "limit": {
       "type": "integer",
       "maximum": 100,
       "minimum": 1,
       "description": "Maximum number of changes to return"
      }
     },
     "additionalProperties": false
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "schema": "l2beat-changes/v1",
  "comparison": {
   "changes": [],
   "change_count": 0,
   "baseline_available": false
  },
  "disclaimer": "Material changes detected from public third-party data; verify independently. The current upstream terms do not expressly grant a commercial redistribution license; confirm commercial rights independently before scaling."
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/quietsignal-l2beat-changes-feed-87b1bb8b/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from 83-29-153-50.sslip.io](https://www.zero.xyz/host/83-29-153-50.sslip.io/llms.txt)