# M2MCent Web3 Smart Contract Monitor MCP Node

> M2MCent Web3 Smart Contract Monitor MCP Node is a paid API for AI agents from api.m2mcent.com, paid per call via x402, $1.279463/call, status unknown (last checked 2026-10-15).

Executes a query against a monetized remote MCP node specializing in web3 smart contract monitoring, returning a boolean summary result.

## Facts

- Endpoint: POST https://api.m2mcent.com/web3-smart-contract-monitor-mcp-209/api/execute?utm_source=zero.xyz
- Price: $1.279463/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/m2mcent-web3-smart-contract-monitor-mcp-node-bbd7dc5b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_4FdA4hHyjsaGw0RL647lB

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-web3-smart-contract-monitor-mcp-node-bbd7dc5b -d '<json body>'
```

Example prompt: Check whether any new events have been emitted by the Uniswap V3 USDC/ETH pool contract today using the M2MCent smart contract monitor.

## When to prefer this

Choose this endpoint when you need to monitor or query web3 smart contract state or events in a lightweight, pay-per-call fashion without managing your own blockchain node infrastructure. It is especially useful when you want gasless USDC micropayments via x402 on Base L2 and need to reduce token context overhead by offloading contract monitoring to a specialized remote MCP node.

## Known failure modes

- Query string missing or malformed — returns 400 validation error
- Payment of 1.279463 USDC not settled via x402 — returns 402 Payment Required
- Smart contract address or network not resolvable — may return false summary
- MCP node unavailable or overloaded — returns 5xx error
- Query too vague or unsupported by this node's specialization — returns false or ambiguous summary

## 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 with a 'summary' boolean field indicating whether the monitored smart contract condition or query matched — true if the event/condition was detected, false otherwise.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "query"
 ],
 "properties": {
  "query": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "summary"
 ],
 "properties": {
  "summary": {
   "type": "boolean"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/m2mcent-web3-smart-contract-monitor-mcp-node-bbd7dc5b/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)