# Swarms MCP Gateway – List Tools

> Swarms MCP Gateway – List Tools is a paid API for AI agents from mcp-gateway.swarms.world, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-13).

Fetches the list of tools exposed by a target MCP server via the Swarms MCP Client Proxy gateway.

## Facts

- Endpoint: POST https://mcp-gateway.swarms.world/mcp/tools
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/swarms-mcp-gateway-list-tools-dfabb690
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_SIlczyD96O5Q8l-yR99dR

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 swarms-mcp-gateway-list-tools-dfabb690 -d '<json body>'
```

Example prompt: Can you fetch the list of all tools exposed by the MCP server at https://my-mcp-server.example.com so I know what capabilities it offers?

## When to prefer this

Use this endpoint when you need to discover what tools a remote MCP server exposes before deciding which tool to call. Prefer this over the proxy tool-call endpoint when you do not yet know the available tools and need to inspect the server's capabilities first.

## Known failure modes

- Target MCP server unreachable — returns error or empty array
- Invalid or malformed MCP server URL — returns 4xx error
- Target server does not implement MCP tools endpoint — returns empty list or error
- Payment not processed — returns 402 requiring x402 payment of $0.01 USDC
- Rate limiting or gateway timeout from the Swarms proxy

## How this service works

Fetch the list of tools exposed by a target MCP server.

## Output

An array of tool objects describing each tool exposed by the target MCP server, including tool names, descriptions, and parameter schemas.

## Response schema (JSON Schema)

```json
{
 "type": "array",
 "items": {
  "type": "object",
  "additionalProperties": true
 },
 "description": "List of tools in requested format"
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/swarms-mcp-gateway-list-tools-dfabb690/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from mcp-gateway.swarms.world](https://www.zero.xyz/host/mcp-gateway.swarms.world/llms.txt)