# Universal A2A & MCP Tool Discovery, Safe-Proxy & Swarm Router

> Universal A2A & MCP Tool Discovery, Safe-Proxy & Swarm Router is a paid API for AI agents from x402broker.com, paid per call via MPP, $0.01/call, status unknown (last checked 2026-10-23).

Searches and routes queries across 500+ indexed MCP servers and A2A tools through a single connection with token compression and prompt injection firewall

## Facts

- Endpoint: POST https://x402broker.com/v1/universal-mcp-gateway?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-23
- Activations on Zero: 0
- Provider: x402broker.com
- Website: https://x402broker.com
- Canonical page: https://www.zero.xyz/c/x402broker-com-universal-a2a-mcp-tool-discovery-safe-proxy-swarm-router-12157ca8
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Zsv6jT8XdAw-BcTzmOTIW

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-universal-a2a-mcp-tool-discovery-safe-proxy-swarm-router-12157ca8 -d '<json body>'
```

Example prompt: Search your meta-router index for any available MCP or A2A tools that handle GitHub security audits — I need to find the best single connection I can route that query through.

## When to prefer this

Choose this endpoint when you need a single-connection gateway to discover and route across a large catalog of MCP/A2A tools rather than maintaining separate connections to individual servers; ideal for agent swarms that need dynamic tool discovery with built-in safety filtering and token compression.

## Known failure modes

- Empty query string returns validation error
- No matching tools found for obscure capability queries
- Prompt-Guard firewall may block queries containing injection-like patterns
- Upstream MCP server unavailability may cause partial results
- Overly broad queries may return too many low-relevance matches

## 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/universal-mcp-gateway)

## Output

Returns a list of matching MCP servers or A2A tools from the 500+ indexed catalog, along with routing information, token-compressed responses, and any relevant metadata about the matched tools — all filtered through the Prompt-Guard firewall for safety.

## 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-universal-a2a-mcp-tool-discovery-safe-proxy-swarm-router-12157ca8/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)