# PoolProof Chain Alive Check

> PoolProof Chain Alive Check is a paid API for AI agents from poolproof.qalibr.ru:7443, paid per call via x402, $0.003/call, status down (last checked 2026-09-17).

Checks whether a blockchain is alive or abandoned by analyzing its TVL trend across 1-year, 6-month, 90-day, and 30-day windows, returning a verdict with risk flags.

## Facts

- Endpoint: POST https://poolproof.qalibr.ru:7443/v1/chain
- Price: $0.003/call
- Payment: x402
- Status: down
- Last checked: 2026-09-17
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/poolproof-chain-alive-check-5ee6d8bb
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_FXa6RXqKWEoFdP2-whqDm

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 poolproof-chain-alive-check-5ee6d8bb -d '<json body>'
```

Example prompt: Is the Arbitrum chain still alive and healthy? Check its TVL trend across the last year, 6 months, 90 days, and 30 days and tell me if it's collapsed, falling, or tiny.

## When to prefer this

Use this endpoint when you need a quick, opinionated verdict on whether a blockchain is still alive or has been effectively abandoned, based on multi-window TVL trend analysis rather than a single snapshot price or raw TVL number. Prefer this over generic TVL APIs when you specifically need abandonment/collapse detection with structured flags for automated decision-making in DeFi agent workflows.

## Known failure modes

- Unknown or unsupported chain identifier returns an error or empty result
- Chain data unavailable due to missing historical TVL data
- Payment not completed results in 402 response
- Malformed request body returns validation error
- Chain is so new that insufficient historical windows exist to evaluate trends

## How this service works

Is this chain alive: TVL trend over 1y/6m/90d/30d

## Output

Returns a JSON object with a boolean 'ok' field, a 'verdict' string summarizing chain health, an array of 'flags' (each with a 'code' and 'msg') indicating issues like COLLAPSED, STILL_FALLING, or TINY TVL, and a 'disclaimer'. An empty flags array means no checks failed.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "required": {
   "type": "string"
  },
  "properties": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "schema": {
  "type": "object",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "properties": {
   "ok": {
    "type": "boolean"
   },
   "flags": {
    "type": "array",
    "items": {
     "type": "object",
     "properties": {
      "msg": {
       "type": "string"
      },
      "code": {
       "type": "string"
      }
     }
    },
    "description": "Empty means nothing failed the checks"
   },
   "verdict": {
    "type": "string"
   },
   "disclaimer": {
    "type": "string"
   }
  }
 },
 "description": "TVL across 1y/6m/90d/30d windows. Separates a quiet ecosystem from an abandoned one. Flags COLLAPSED, STILL_FALLING, TINY."
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/poolproof-chain-alive-check-5ee6d8bb/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from poolproof.qalibr.ru:7443](https://www.zero.xyz/host/poolproof.qalibr.ru%3A7443/llms.txt)