# RadhikaChain ZK Merkle Proof Verifier

> RadhikaChain ZK Merkle Proof Verifier is a paid API for AI agents from x402.radhikatmosphere.com, paid per call via x402, $8.58/call, status unknown (last checked 2026-09-15).

Computes and returns a Poseidon-hashed Merkle root with privacy-preserving proof parameters, without exposing leaf or path data.

## Facts

- Endpoint: GET https://x402.radhikatmosphere.com/zk/merkle
- Price: $8.58/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/radhikachain-zk-merkle-proof-verifier-78281268
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_BqUz0onAinAG8aZJHW0O2

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 radhikachain-zk-merkle-proof-verifier-78281268
```

Example prompt: Can you run a ZK Merkle root computation using RadhikaChain — I need the Poseidon-hashed root for a tree of depth 4 without exposing any leaf or path data, and tell me the asymmetry score?

## When to prefer this

Choose this endpoint when you need a privacy-preserving Merkle root computation using audited Poseidon hash constants (Orchard/Zcash) without leaking leaf or path witnesses. It is ideal for zero-knowledge inclusion proofs where the caller must not expose which leaf is being proven. Prefer it over general Merkle libraries when you need on-demand verifiable computation billed per-call via x402 USDC on Base, with no account or subscription required.

## Known failure modes

- Payment not included or insufficient USDC — returns 402 Payment Required
- Invalid or malformed request parameters — returns 400 Bad Request
- Service temporarily unavailable — returns 503
- ZK circuit computation timeout for large trees — returns 504
- Network congestion on Base chain causing payment verification delay

## How this service works

Telemetria de cadena, inteligencia de defensa y computo verificable (Halo2, Nova, Plonky3). Pago por peticion en USDC nativo en Base (eip155:8453) mediante x402 v2 scheme exact; sin cuenta ni suscripcion. Catalogo canonico: GET /.well-known/x402.

## Output

Returns a JSON object with: the Merkle tree depth (k), a success flag (ok), the Poseidon-hashed Merkle root using audited Orchard/Zcash constants (hash), an asymmetry score (asimetria), and a privacy statement confirming that leaf and path data are never logged or returned — only the root is public.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "properties": {
  "input": {
   "type": "object",
   "properties": {
    "body": {
     "type": "object",
     "additionalProperties": true
    },
    "queryParams": {
     "type": "object",
     "additionalProperties": true
    }
   }
  },
  "output": {
   "type": "object",
   "properties": {
    "example": {
     "type": "object",
     "additionalProperties": true
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "k": 11,
  "ok": true,
  "hash": "Poseidon · constantes auditadas Orchard/Zcash",
  "asimetria": 38,
  "privacidad": "la hoja y el camino no se registran ni se devuelven; solo la raiz es publica",
  "profundidad": 4
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/radhikachain-zk-merkle-proof-verifier-78281268/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402.radhikatmosphere.com](https://www.zero.xyz/host/x402.radhikatmosphere.com/llms.txt)