# Layer2 Storage Proof MCP

> Layer2 Storage Proof MCP is a paid API for AI agents from api.m2mcent.com, paid per call via x402, $0.2/call, status unknown (last checked 2026-10-15).

Generates or verifies layer-2 blockchain storage proofs for on-chain data integrity attestation

## Facts

- Endpoint: POST https://api.m2mcent.com/layer2-storage-proof-mcp/api/process?utm_source=zero.xyz
- Price: $0.2/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/layer2-storage-proof-mcp-4d41f064
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_QiZa4-8eLBwGiZNG2r8rA

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 layer2-storage-proof-mcp-4d41f064 -d '<json body>'
```

Example prompt: Can you generate a layer-2 storage proof for this data string so I can verify its integrity on-chain: '0xabc123deadbeef...'?

## When to prefer this

Use this endpoint when you need to cryptographically prove or verify the integrity and inclusion of data stored in a layer-2 blockchain system. It is best suited for agents working in decentralized applications, smart contract interactions, or compliance workflows that require tamper-evident attestation of off-chain or rollup state data.

## Known failure modes

- Invalid or malformed data string returns an error response
- Data not found in layer-2 state results in proof generation failure
- Service unavailability or timeout during proof computation
- Insufficient payment (x402 payment required) blocks access
- Empty or null data field causes bad request error

## 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 cryptographic storage proof (likely a Merkle or ZK proof structure) attesting to the validity or inclusion of the submitted data string within a layer-2 storage context, along with a validity status or proof artifact that can be used for on-chain verification.

## Response schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/layer2-storage-proof-mcp-4d41f064/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)