# Coin Railz Cross-Chain USDC Bridge (CCTP)

> Coin Railz Cross-Chain USDC Bridge (CCTP) is a paid API for AI agents from coinrailz.com, paid per call via x402, $2/call, status unknown (last checked 2026-09-14).

Routes USDC across blockchain networks via Circle CCTP, enabling payment on Ethereum and receipt on Base, Polygon, or Arbitrum instantly

## Facts

- Endpoint: POST https://coinrailz.com/x402/seamless-chain-bridge
- Price: $2/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/coin-railz-cross-chain-usdc-bridge-cctp-3377803e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Mcp11j-XofYwmOCVajsSt

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 coin-railz-cross-chain-usdc-bridge-cctp-3377803e -d '<json body>'
```

Example prompt: Bridge 500 USDC from Ethereum mainnet to Base for my wallet — I need it to arrive on Base instantly so I can use it for a trade.

## When to prefer this

Use this endpoint when an AI agent or trading system needs to move USDC across EVM chains instantly using Circle's native CCTP protocol, particularly when the source chain is Ethereum mainnet and the destination is Base, Polygon, or Arbitrum. Prefer over generic DEX bridges when USDC-native transfers without wrapping or slippage are required.

## Known failure modes

- Insufficient USDC balance on source chain — transaction rejected
- Unsupported destination chain specified — only Base, Polygon, Arbitrum supported
- Circle CCTP relay congestion causing delayed finality
- Invalid wallet address format — returns error
- Payment of $2 USDC fee not received — request blocked
- Network RPC failure on source or destination chain

## How this service works

Cross-chain USDC routing via Circle CCTP - Pay on Ethereum, receive on Base/Polygon/Arbitrum instantly (Premium B2B2C Infrastructure)

## Output

A JSON object confirming the bridge execution with a success boolean, service identifier ('seamless-chain-bridge'), result message, and ISO timestamp of when the transfer was processed.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "query": {
   "type": "string",
   "description": "Query parameter for the service"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "application/json",
 "format": "json",
 "example": {
  "result": "Service executed successfully",
  "service": "seamless-chain-bridge",
  "success": true,
  "timestamp": "2026-02-07T01:42:47.263Z"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/coin-railz-cross-chain-usdc-bridge-cctp-3377803e/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from coinrailz.com](https://www.zero.xyz/host/coinrailz.com/llms.txt)