# RadhikaChain STARK Proof Verification

> RadhikaChain STARK Proof Verification is a paid API for AI agents from x402.radhikatmosphere.com, paid per call via x402, $7.696/call, status unknown (last checked 2026-09-13).

Executes and returns a real STARK proof computation over a BabyBear field, returning verifiable cryptographic proof telemetry including field, rows, latency, and number of queries

## Facts

- Endpoint: GET https://x402.radhikatmosphere.com/zk/stark
- Price: $7.696/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/radhikachain-stark-proof-verification-74667109
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_YrzXXnLfFSWWqfNZOGeEF

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-stark-proof-verification-74667109
```

Example prompt: Run a real STARK proof computation for me using RadhikaChain and give me back the BabyBear field parameters, number of rows, latency, and query count so I can verify it myself with open-source software.

## When to prefer this

Use this endpoint when you need a real, independently verifiable STARK proof result over the BabyBear field with no account or subscription required — ideal for pay-per-call ZK proof benchmarking, auditing STARK prover performance, or integrating a trustless verifiable computation step into an agent workflow. Prefer this over SNARK-based endpoints (Halo2, Nova, Plonky3) when BabyBear field arithmetic and STARK-specific query counts are relevant to your use case.

## Known failure modes

- Payment not included or invalid x402 USDC payment on Base (eip155:8453) — returns 402 Payment Required
- Proof computation timeout — latency_ms may spike or endpoint may return an error
- Service unavailable or endpoint offline — returns 5xx error
- Malformed request headers — returns 4xx client error
- Insufficient USDC balance for per-call payment of $1.48

## 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

A JSON object containing: ok (boolean success flag), a Spanish-language note confirming the proof is real and independently verifiable, campo (field name, e.g. BabyBear), filas (number of rows, e.g. 256), latencia_ms (proof generation latency in milliseconds), and num_queries (number of queries used in the proof, e.g. 64).

## 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": "prueba STARK real; verificable con el mismo software libre, sin confiar en el emisor",
  "campo": "BabyBear",
  "filas": 256,
  "latencia_ms": 1236.162942,
  "num_queries": 64
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/radhikachain-stark-proof-verification-74667109/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)