# RadhikaChain Nova IVC Fold Execution

> RadhikaChain Nova IVC Fold Execution is a paid API for AI agents from x402.radhikachain.xyz, paid per call via x402, $6.032/call, status unknown (last checked 2026-09-14).

Executes a Nova incremental verifiable computation (IVC) fold step over BN256/Grumpkin curves and returns a constant-size proof with folded state, step count, and final state hash.

## Facts

- Endpoint: GET https://x402.radhikachain.xyz/zk/fold
- Price: $6.032/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/radhikachain-nova-ivc-fold-execution-c489dfeb
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ScPOW2EtoFItq_r8ll2Hj

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-nova-ivc-fold-execution-c489dfeb
```

Example prompt: Run a live Nova IVC fold computation on RadhikaChain right now — I want the step count, the curve parameters, and the final folded state hash to confirm constant-size proof behavior.

## When to prefer this

Choose this endpoint when you need a live, on-demand Nova IVC fold execution with a verifiable constant-size proof output, paid per call in USDC on Base with no account or subscription required. Prefer this over static proof services when you need proof that computation is performed in real-time rather than served from a cache, and when you specifically need BN256/Grumpkin Nova folding semantics rather than Halo2 membership proofs or Plonky3 STARK batches (available as sibling endpoints on the same host).

## Known failure modes

- Payment not included or insufficient USDC — x402 payment required before computation executes
- Invalid or malformed x402 payment header — returns payment error
- Computation timeout — fold step fails to complete within allowed window
- Chain congestion on Base — payment settlement delay causing request failure
- Rate limiting if multiple rapid requests are made without valid payment per call

## 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 confirming the fold was executed live (not precomputed), with the number of steps folded, the elliptic curves used (BN256/Grumpkin), a property description of constant-size proofs, and a 256-bit hex final folded state hash.

## 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": {
  "ok": true,
  "nota": "plegado ejecutado en esta peticion, no una cifra precalculada",
  "pasos": 4,
  "curvas": "BN256 / Grumpkin",
  "propiedad": "prueba de tamano constante: 4 pasos o 4000 se verifican igual de rapido",
  "estado_final": "0x0000000000000000000000000000000000000000000000000de0c0b4ccfc8eba"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/radhikachain-nova-ivc-fold-execution-c489dfeb/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402.radhikachain.xyz](https://www.zero.xyz/host/x402.radhikachain.xyz/llms.txt)