# 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 2026-10-21).

Searches across 500+ indexed MCP servers and A2A tools by capability query, returning compressed, firewall-screened results for agent orchestration and tool routing.

## Facts

- Endpoint: GET https://mesh.agentdiet.dev/v1/execute?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-21
- 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-a65dfa8c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_7ogN_wvfgnSKn04YI9JeB

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-a65dfa8c
```

Example prompt: Search the agent tool mesh for MCP servers that handle 'company enrichment' so I can find a verified, token-compressed endpoint to enrich our lead list.

## When to prefer this

Choose this endpoint when an AI agent needs to dynamically discover which MCP servers or A2A tools are available for a given capability at runtime, especially when token efficiency matters or when you need to verify that an external endpoint is safe before proxying through it. Prefer this over hardcoded tool lists when the agent ecosystem is large, evolving, or unknown.

## Known failure modes

- No matching tools found for the given query — returns empty results or low-confidence matches
- Endpoint URL provided for verification is not indexed — returns unverified or unknown status
- Query too vague or ambiguous — results may include loosely related tools
- Rate limit or payment failure (x402) — agent receives 402 response requiring USDC payment
- Firewall (Prompt-Guard) flags query as potentially injected — request blocked with security warning

## 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, token-pruned list of matching MCP servers or A2A tools ranked by relevance to the query, including capability descriptions, endpoint metadata, and Prompt-Guard firewall clearance status. The 85% token compression ensures minimal context overhead for the calling agent.

## 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-a65dfa8c/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)