# 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 2026-10-21).

Searches an index of 500+ MCP servers and A2A tools by capability query, returning compressed, firewall-filtered routing results through a single meta-router connection

## Facts

- Endpoint: GET https://x402broker.com/v1/workflows/execute?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-21
- 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-74687574
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_FmMko_GFf8EE3_oToM5jP

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-74687574
```

Example prompt: Search the MCP and A2A tool index for any servers that handle SEC filings or company enrichment — I need to find what's available and route to the right one.

## When to prefer this

Choose this endpoint when an AI agent needs to dynamically discover which MCP server or A2A tool is best suited for a given capability, rather than hardcoding a specific tool. Ideal for meta-agents or orchestrators that need to route tasks across a broad tool ecosystem without maintaining their own index. Also useful for verifying whether a specific MCP endpoint URL is known, compliant, and routable through a safe proxy with built-in prompt injection defense.

## Known failure modes

- Empty query string returns validation error (minLength:1 required)
- Query matches no indexed tools — returns empty results set
- Queried endpoint URL is not in the index — returns no match
- Service unavailability or upstream MCP index errors returning generic 5xx
- x402 payment not processed — 402 Payment Required response blocking access
- Ambiguous query returns low-relevance or mixed-category tool 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/workflows/execute)

## Output

Returns a structured object containing matched MCP servers and A2A tools relevant to the query, with token-compressed tool manifests (85% compression claimed), safety-filtered results via Prompt-Guard firewall, and routing metadata to connect through the meta-router; may also include SLA or compliance signals for queried endpoint URLs.

## 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-74687574/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)