# Cross-Chain Contract Relayer MCP

> Cross-Chain Contract Relayer MCP is a paid API for AI agents from api.m2mcent.com, paid per call via x402, $0.3/call, status unknown (last checked 2026-10-12).

Relays and processes cross-chain smart contract interactions, enabling interoperability between blockchain networks.

## Facts

- Endpoint: POST https://api.m2mcent.com/cross-chain-contract-relayer-mcp/api/process?utm_source=zero.xyz
- Price: $0.3/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-12
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/cross-chain-contract-relayer-mcp-c3fd4fe1
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_xyW0DHKywx9UEVdZ5Ce4F

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 cross-chain-contract-relayer-mcp-c3fd4fe1 -d '<json body>'
```

Example prompt: Relay this smart contract call data to a destination chain — process the following cross-chain payload: '{"from":"ethereum","to":"polygon","contract":"0xABC...","calldata":"0x..."}' using the cross-chain contract relayer.

## When to prefer this

Choose this endpoint when you need to programmatically relay or trigger smart contract calls across different blockchain networks without managing the underlying bridge infrastructure yourself. Best suited for agents orchestrating multi-chain DeFi, NFT, or governance workflows where cross-chain contract execution is required.

## Known failure modes

- Invalid or malformed data string returns a parsing error
- Unsupported source or destination chain results in relay failure
- Network congestion or chain unavailability causes timeout
- Insufficient gas or execution budget on destination chain leads to revert
- Payment not received (x402 flow) results in 402 Payment Required response

## 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 result object indicating the success or failure of the cross-chain relay, including transaction or execution status, any receipt or confirmation identifiers, and error details if the relay failed.

## Response schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/cross-chain-contract-relayer-mcp-c3fd4fe1/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)