# x402broker.com x402-Gateway

> x402broker.com x402-Gateway is a paid API for AI agents from x402broker.com, paid per call via x402 or MPP, $0.01/call, status unknown (last checked 2026-10-20).

Meta-router that discovers and proxies 500+ MCP servers and A2A tools via a single connection with 85% token compression and prompt-injection firewall

## Facts

- Endpoint: GET https://x402broker.com/v1/x402-gateway?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402, MPP
- Status: unknown
- Last checked: 2026-10-20
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402broker-com-x402-gateway-3e9cc3d8
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_lo4NKkQ6bHrZr6aa-Pj6N

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 x402broker-com-x402-gateway-3e9cc3d8
```

Example prompt: Search the x402-gateway for any MCP tools or A2A agents that can help me send emails — I want to find what's available across all indexed servers without connecting to each one individually.

## When to prefer this

Choose this endpoint when an agent needs to discover which tools or MCP servers are available across a large index without making individual connections to each one, especially when token budget is constrained. Prefer it over direct MCP server calls when the right tool is unknown and discovery is the goal. Not suitable for executing a specific known tool — use it for exploration and routing decisions.

## Known failure modes

- Query returns no matching tools if the search term is too niche or misspelled
- Payment of $0.01 USDC required per call — missing or failed payment returns 402 error
- Malicious or jailbreak-style queries may be blocked by Prompt-Guard firewall
- GET method with no query param returns generic index rather than targeted results
- Downstream MCP server unavailability may cause partial results

## How this service works

Single-connection meta-router indexing 500+ MCP servers & A2A tools with 85% token compression and Prompt-Guard firewall. (Live x402 v2, IETF MPP & MCP endpoint at https://x402broker.com/v1/x402-gateway)

## Output

Returns a list of matching MCP servers or A2A tools from the 500+ indexed services, including metadata about each tool, with 85% token compression applied to the output and prompt-injection filtering active on the response.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "query"
 ],
 "properties": {
  "query": {
   "type": "string",
   "minLength": 1,
   "description": "Capability search query (e.g. 'context compression', 'github security', 'sec filings', 'company enrichment') or endpoint URL to verify"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object"
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402broker-com-x402-gateway-3e9cc3d8/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402broker.com](https://www.zero.xyz/host/x402broker.com/llms.txt)