# EVM Opcode Fuzzer MCP

> EVM Opcode Fuzzer MCP is a paid API for AI agents from api.m2mcent.com, paid per call via x402, $0.35/call, status unknown (last checked 2026-10-15).

Fuzz-tests EVM bytecode or smart contract opcodes to discover vulnerabilities, edge cases, and unexpected behaviors through automated input mutation.

## Facts

- Endpoint: POST https://api.m2mcent.com/evm-opcode-fuzzer-mcp/api/process?utm_source=zero.xyz
- Price: $0.35/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/evm-opcode-fuzzer-mcp-f890245e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_B1ldLjVEFVOZbyWDyS9EO

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 evm-opcode-fuzzer-mcp-f890245e -d '<json body>'
```

Example prompt: Can you fuzz-test this EVM bytecode for opcode vulnerabilities and edge cases? Here's the contract data: 0x6080604052600436106100...

## When to prefer this

Choose this endpoint when you need automated, mutation-based security testing of EVM bytecode or smart contract opcode sequences, particularly during pre-deployment audits or CI/CD pipelines for Ethereum smart contracts. Prefer it over static analysis tools when you want to discover runtime edge cases and crash conditions that only emerge under unexpected input conditions.

## Known failure modes

- Invalid or malformed bytecode input causes parsing failure
- Bytecode too large for processing window
- Timeout on deeply recursive or infinite-loop opcodes
- Empty data field returns error with no results
- Non-EVM data passed in the data field returns unsupported format 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 fuzzing report detailing discovered opcode edge cases, unexpected execution paths, potential vulnerabilities, error conditions, and any crashes or panics encountered during automated mutation testing of the provided EVM bytecode.

## Response schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/evm-opcode-fuzzer-mcp-f890245e/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)