# 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 mesh.agentdiet.dev, 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, returning compressed, firewall-screened results via a single connection

## Facts

- Endpoint: POST https://mesh.agentdiet.dev/v1/execute?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-23
- Activations on Zero: 0
- Provider: mesh.agentdiet.dev
- Website: https://mesh.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/mesh-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-proxy-swarm-ad4afe8b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_3sBM1DSaQl3D5vAYpOx5b

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 mesh-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-proxy-swarm-ad4afe8b -d '<json body>'
```

Example prompt: Search the MCP and A2A tool index for any available tools that handle 'SEC filings' or 'company enrichment' — I need to find the right capability to plug into my agent pipeline.

## When to prefer this

Choose this endpoint when an agent needs to discover, verify, or route to one of 500+ MCP servers or A2A tools without managing multiple separate connections — especially when token budget is tight (85% compression) or when untrusted tool responses need firewall screening before passing back to an LLM.

## Known failure modes

- Query string too vague returns zero or low-relevance matches
- Endpoint URL verification fails if the URL is not indexed
- Payment failure (x402) blocks execution if USDC balance is insufficient
- Idempotency-Key collision returns cached result from a prior call
- Firewall rejects a malicious or injection-containing query payload

## 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://mesh.agentdiet.dev/v1/execute)

## Output

Returns a compressed (up to 85% token reduction), Prompt-Guard-firewall-screened list of matching MCP server endpoints or A2A tools relevant to the query, including capability metadata and verified 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/mesh-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-proxy-swarm-ad4afe8b/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from mesh.agentdiet.dev](https://www.zero.xyz/host/mesh.agentdiet.dev/llms.txt)