# Offchain ZK State Channel MCP

> Offchain ZK State Channel MCP is a paid API for AI agents from api.m2mcent.com, paid per call via x402, $0.25/call, status unknown (last checked 2026-10-16).

Processes offchain zero-knowledge state channel operations for privacy-preserving, scalable multi-party computations via a model context protocol endpoint.

## Facts

- Endpoint: POST https://api.m2mcent.com/offchain-zk-state-channel-mcp/api/process?utm_source=zero.xyz
- Price: $0.25/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/offchain-zk-state-channel-mcp-eb3f5537
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_BjN4DBY_q-Cx92rurEZkW

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 offchain-zk-state-channel-mcp-eb3f5537 -d '<json body>'
```

Example prompt: Process this offchain state channel update using zero-knowledge proofs — here's the state data payload I need submitted: '{"channelId": "ch_abc123", "nonce": 5, "balances": {"alice": 100, "bob": 50}}'.

## When to prefer this

Choose this endpoint when you need privacy-preserving offchain state channel computation using zero-knowledge proofs, especially when you want to avoid onchain gas costs while maintaining cryptographic integrity. Prefer it over pure onchain solutions for scalable, private multi-party state transitions.

## Known failure modes

- Invalid or malformed data string returns a 400-level error
- ZK proof generation or verification failure returns a processing error
- Expired or invalid state channel nonce causes rejection
- Payment not received or underpaid (x402 protocol) results in 402 Payment Required
- Timeout if ZK computation exceeds processing limits

## How this service works

The premier global index of 1,069 monetized MCP nodes across 205 specialized subdomains. Gasless USDC runtime settlements via x402 V2 Spec on Base L2. Save 95% token context.

## Output

Returns a processed result from the offchain ZK state channel operation, likely including an updated channel state, a zero-knowledge proof attestation, or a confirmation of the state transition applied to the submitted data payload.

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "success": true
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/offchain-zk-state-channel-mcp-eb3f5537/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.m2mcent.com](https://www.zero.xyz/host/api.m2mcent.com/llms.txt)