# 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 x402-audit.agentdiet.dev, paid per call via MPP, $0.01/call, status unknown (last checked 2026-10-21).

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

## Facts

- Endpoint: GET https://x402-audit.agentdiet.dev/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: x402-audit.agentdiet.dev
- Website: https://x402-audit.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/x402-audit-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-proxy-54cf49d8
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Xh_aTtnjCYplVTTmDVsP1

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 x402-audit-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-proxy-54cf49d8
```

Example prompt: Search the MCP tool mesh for any servers that handle SEC filings or company enrichment — I want to find which tools are available before routing my agent to them.

## When to prefer this

Choose this endpoint when an agent needs to discover which MCP servers or A2A tools exist for a given capability without knowing them in advance, especially when token budget is constrained (85% compression) or when prompt injection from untrusted tool responses is a concern. Prefer this over direct MCP server connections when orchestrating multi-tool swarms or when you need a single connection point into a broad ecosystem.

## Known failure modes

- Empty query string returns validation error
- No matching tools found for niche queries
- Upstream MCP server unavailable causing partial results
- Payment not processed via x402 results in 402 response
- Malformed endpoint URL when used in verification mode

## 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://x402-audit.agentdiet.dev/v1/mesh/dispatch)

## Output

Returns a list of matched MCP servers and A2A tools relevant to the query, with compressed tool manifests (85% token reduction), routing metadata, and Prompt-Guard firewall screening applied to prevent prompt injection from upstream 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/x402-audit-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-proxy-54cf49d8/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402-audit.agentdiet.dev](https://www.zero.xyz/host/x402-audit.agentdiet.dev/llms.txt)