# 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+ MCP servers and A2A tools through a single connection with token compression and prompt-injection firewall protection.

## Facts

- Endpoint: POST https://x402broker.com/v1/swarm-execute?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-8fb2ca04
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_qF6q8RUr4VUQK58kGK1KC

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-8fb2ca04 -d '<json body>'
```

Example prompt: Search the MCP and A2A tool index for anything that can handle 'github security auditing' — I want to find the best available tool and route my request through it with token compression enabled.

## When to prefer this

Choose this endpoint when you need to discover which of 500+ MCP servers or A2A tools best matches a capability requirement, or when you want to route a task through a single connection rather than managing multiple integrations. Ideal for agent orchestration workflows where the correct downstream tool is unknown, or when token budget is constrained and 85% compression is valuable. Prefer over direct tool calls when prompt injection protection is required.

## Known failure modes

- Query too vague — returns no matching tools or low-relevance results
- Downstream MCP server unavailable — swarm router may return partial results
- Prompt-Guard firewall blocks query if it resembles an injection attempt
- Payment not processed — x402 micropayment failure blocks execution
- Idempotency-Key collision — retried requests may return cached 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/swarm-execute)

## Output

Returns a structured object containing matched tools or MCP servers relevant to the query, along with routing metadata, token-compressed responses from the swarm, and any firewall screening results. The response schema is an open object that varies based on which downstream tools are invoked.

## 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-8fb2ca04/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)