# 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 via a single meta-router endpoint with token compression and prompt firewall protection.

## Facts

- Endpoint: POST https://x402broker.com/v1/mesh/dispatch?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-751e0b94
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_H5sDBRT0VBHN05Zn4dwIY

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-751e0b94 -d '<json body>'
```

Example prompt: Search the MCP tool index for anything that can handle SEC filings or public company financial data — I want to find the best available tool and route my query through it.

## When to prefer this

Choose this endpoint when you need a single connection point to discover and route across a large ecosystem of MCP servers and A2A tools, rather than knowing in advance which specific tool to call. Ideal for dynamic agent workflows where the right tool must be discovered at runtime, or when you want prompt-firewall protection and token compression baked into the routing layer.

## Known failure modes

- Empty or too-vague query returns no matching tools
- Query matches no indexed MCP servers — returns empty result set
- Payment not fulfilled (HTTP 402) blocks the request
- Prompt-Guard firewall blocks a query flagged as unsafe
- Idempotency key reuse returns cached prior result
- Malformed query string causes validation error

## 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/mesh/dispatch)

## Output

Returns a structured response identifying matching MCP servers or A2A tools for the query, with token-compressed results and prompt-firewall-filtered output. The response includes routed dispatch results from the indexed pool of 500+ tools.

## 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-751e0b94/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)