# M2MCent Zero-Knowledge Vault MCP

> M2MCent Zero-Knowledge Vault MCP is a paid API for AI agents from api.m2mcent.com, paid per call via x402, $0.05/call, status unknown (last checked 2026-10-12).

Processes data through a monetized zero-knowledge vault MCP node with gasless USDC micropayment settlement on Base L2

## Facts

- Endpoint: POST https://api.m2mcent.com/zeroknowledge-vault-mcp/api/process?utm_source=zero.xyz
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-12
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/m2mcent-zero-knowledge-vault-mcp-9bee9ef0
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_3SPyvA7PgmSl_oxKzCcrF

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 m2mcent-zero-knowledge-vault-mcp-9bee9ef0 -d '<json body>'
```

Example prompt: Process this data string through the M2MCent zero-knowledge vault MCP node and return the transaction hash confirming settlement on Base L2.

## When to prefer this

Choose this endpoint when you need to process a data payload through a privacy-preserving zero-knowledge vault with on-chain settlement proof on Base L2, and when you specifically require the x402 micropayment protocol for gasless USDC billing at $0.05 per call. It is best suited for agentic workflows that need both computation and an immutable transaction record without managing gas fees directly.

## Known failure modes

- Insufficient USDC balance for the $0.05 per-call fee causes payment failure
- Malformed or missing data string in the request body returns a validation error
- x402 protocol payment negotiation failure if wallet or facilitator is misconfigured
- Network or node unavailability on Base L2 may cause timeout or failed transaction
- Invalid or empty data field causes processing to fail with no transaction hash returned

## 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 JSON object containing a transaction hash (txHash) confirming the on-chain settlement on Base L2 and a boolean success field indicating whether the processing completed successfully.

## Response schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/m2mcent-zero-knowledge-vault-mcp-9bee9ef0/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)