# Barker Cross-Chain Stablecoin Route Lookup

> Barker Cross-Chain Stablecoin Route Lookup is a paid API for AI agents from mcp.barker.money, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).

Returns available cross-chain bridge routes and venue coverage for a given stablecoin from a specified origin chain.

## Facts

- Endpoint: GET https://mcp.barker.money/barker_crosschain_routes
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/barker-cross-chain-stablecoin-route-lookup-d8259a8c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_VfzPSnCOv0DrtwL4Qb6aW

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 barker-cross-chain-stablecoin-route-lookup-d8259a8c
```

Example prompt: What bridge routes are available for USDC from Arbitrum? I want to know which venues and chains I can move it to.

## When to prefer this

Use this endpoint when you need to discover which bridge protocols and cross-chain venues are available to move a specific stablecoin from a given chain, before executing or quoting a bridge transaction. It is a discovery/planning step rather than an execution step — prefer it over execution endpoints when the user wants to understand their options first.

## Known failure modes

- Unsupported stablecoin symbol returns empty or error response
- Unsupported or misspelled chain name yields no results
- Stablecoin symbol must be lowercase; incorrect casing may cause no match
- Origin chain with no indexed routes returns empty route list
- Service unavailability returns HTTP error or payment-required response

## How this service works

Barker's cross-chain route availability for a stablecoin from a given chain (bridge/venue coverage). Use for 'bridge USDC from arbitrum', '跨链路径'.

## Output

A list of available cross-chain routes for the specified stablecoin from the given origin chain, including which bridge protocols or venues support the transfer and which destination chains are reachable.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "symbol": {
       "type": "string",
       "description": "Stablecoin symbol (lowercase)"
      },
      "from_chain": {
       "type": "string",
       "description": "Origin chain (lowercase)"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/barker-cross-chain-stablecoin-route-lookup-d8259a8c/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from mcp.barker.money](https://www.zero.xyz/host/mcp.barker.money/llms.txt)