# CloudMaxi0x Candle Proof Verification

> CloudMaxi0x Candle Proof Verification is a paid API for AI agents from cloudmaxi0x.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).

Verifies a single OHLCV candle against a previously obtained SHA-256 Merkle root, confirming the candle's authenticity and inclusion in a deterministic dataset

## Facts

- Endpoint: GET https://cloudmaxi0x.com/v1/data/proof
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/cloudmaxi0x-candle-proof-verification-a92564b0
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_HyUyFmw5GVUZNDw6hSzu8

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 cloudmaxi0x-candle-proof-verification-a92564b0
```

Example prompt: Can you verify that the BTC/USDT 1-hour candle with open_time 1700000000000 is genuinely included in the Merkle root I got from my earlier OHLCV query covering the range from 1699996800000 to 1700003600000?

## When to prefer this

Use this endpoint when you already hold a Merkle root from a prior OHLCV query and need to cryptographically verify a single candle without re-downloading the full dataset. Ideal for audit trails, compliance attestations, and third-party data validation where tamper-evidence is required. Prefer this over re-fetching full OHLCV data when you only need to prove one specific candle's authenticity efficiently and cheaply.

## Known failure modes

- Candle open_time falls outside the specified start_ms/end_ms range — returns error indicating candle not in range
- Symbol or interval not supported — returns 404 or validation error
- Malformed timestamp integers — returns 400 bad request
- open_time points to an unclosed candle — not included in proof
- Network or payment failure — 402 if payment not provided, 503 on service unavailability

## How this service works

Deterministic, verifiable crypto market data and honest backtest audits. Use GET /v1/data/ohlcv for exact OHLCV over a half-open range with a SHA-256 Merkle manifest - only closed candles are returned, exchange decimal strings are preserved byte for byte, so the same query always yields the same root. Use GET /v1/data/proof to verify one candle against a root you already hold. Use POST /v1/validate/trades to find out whether a list of trade returns can be distinguished from luck, and POST /v1/validate/filter to test a trade filter against a permutation null. GET /, /v1/schema and /v1/data/sources are free.

## Output

Returns a Merkle inclusion proof demonstrating whether the specified candle (identified by open_time) is authentically part of the dataset for the given symbol, interval, and time range. The proof allows independent verification against the SHA-256 Merkle root without re-fetching the full OHLCV dataset.

## 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",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "symbol",
      "interval",
      "start_ms",
      "end_ms",
      "open_time"
     ],
     "properties": {
      "end_ms": {
       "type": "integer"
      },
      "symbol": {
       "type": "string"
      },
      "interval": {
       "type": "string"
      },
      "start_ms": {
       "type": "integer"
      },
      "open_time": {
       "type": "integer",
       "description": "the candle to prove, within the range"
      }
     }
    }
   },
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/cloudmaxi0x-candle-proof-verification-a92564b0/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from cloudmaxi0x.com](https://www.zero.xyz/host/cloudmaxi0x.com/llms.txt)