# x402-gateway MCP Multi-Tool Gateway

> x402-gateway MCP Multi-Tool Gateway is a paid API for AI agents from x402.freeq.one, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-15).

Pay-per-call MCP gateway exposing 7 tools (markdown conversion, token price, wallet portfolio, whale alerts, cross-chain balance, changelog from OpenAPI, changelog from Git) with per-tool micropayments on Base via x402

## Facts

- Endpoint: POST https://x402.freeq.one/mcp
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-gateway-mcp-multi-tool-gateway-a2fc7e57
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_JBAtRX8WZZnGVEalkvxsF

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 x402-gateway-mcp-multi-tool-gateway-a2fc7e57 -d '<json body>'
```

Example prompt: Check the current price of ETH and also pull the wallet portfolio for address 0xABC...123 across all chains — pay per call via x402 on Base.

## When to prefer this

Choose this endpoint when you need pay-per-call access to a curated set of crypto/blockchain and document-conversion tools without a subscription, and you want to pay only for what you use via USDC micropayments on Base using the x402 protocol. Ideal for agents that need on-chain data (wallet balances, token prices, whale alerts) combined with utility tools (HTML-to-markdown, changelog generation) in a single MCP-compatible gateway.

## Known failure modes

- Payment failure: insufficient USDC balance or x402 payment rejected — returns 402 Payment Required
- Invalid wallet address format — returns error or empty result
- Unsupported token symbol — token price tool returns not-found error
- Invalid or inaccessible Git/OpenAPI URL — changelog tools return fetch error
- Rate limiting or upstream data source unavailability — returns 503 or timeout
- Malformed HTML input — markdown tool may return partial or empty output

## How this service works

x402-gateway MCP call

## Output

Depending on the tool called, the agent receives: clean LLM-ready markdown (from HTML), a token's current price, a structured wallet portfolio with balances, a list of recent whale alert transactions, cross-chain token balances for an address, or a human-readable changelog derived from an OpenAPI diff or Git history. Each response is returned after a successful x402 USDC micropayment on Base.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "tool": {
   "type": "string",
   "description": "Tool name (see GET /tools for the catalog)"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "result": {}
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-gateway-mcp-multi-tool-gateway-a2fc7e57/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402.freeq.one](https://www.zero.xyz/host/x402.freeq.one/llms.txt)