# 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 and routes across 500+ indexed MCP servers and A2A tools via a single meta-router endpoint with prompt firewall and token compression

## Facts

- Endpoint: GET https://x402broker.com/v1/mesh/dispatch?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-e689f3a0
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_3GUP26e5a-y-qaKrcTLy3

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-e689f3a0
```

Example prompt: Search the MCP tool index for any servers that handle SEC filings or company enrichment — I want to find what's available so I can route my next request properly.

## When to prefer this

Choose this endpoint when an AI agent needs to dynamically discover which MCP servers or A2A tools support a given capability without hardcoding individual tool URLs, especially when operating across a large and changing tool ecosystem. It is particularly useful when token efficiency matters (85% compression) or when prompt injection safety is a concern (Prompt-Guard firewall).

## Known failure modes

- Empty query string returns validation error
- Query yields no matching tools if capability is not indexed
- Endpoint URL verification returns not-found for unlisted URLs
- Service unavailable if mesh index is updating
- Payment required (HTTP 402) if x402 micropayment not provided

## 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 list of matched MCP servers or A2A tools relevant to the query, including their capabilities, endpoint metadata, and routing information, compressed with 85% token reduction and filtered through a prompt-guard firewall.

## 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-e689f3a0/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)