# 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 a meta-index of 500+ MCP servers and A2A tools by capability query, returning token-compressed results with prompt-injection firewall protection

## Facts

- Endpoint: GET https://mesh.agentdiet.dev/v1/workflows/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-a3a33a4d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_iTpUD_FXBtL-kskm5nn1q

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-a3a33a4d
```

Example prompt: Search the MCP and A2A tool index for capabilities related to 'company enrichment' — I need to find which servers support B2B lead data so I can route my agent there.

## When to prefer this

Choose this endpoint when an AI agent needs to dynamically discover new MCP servers or A2A tools at runtime rather than using a hardcoded list — especially useful when the required capability is unknown in advance, when routing to the safest available proxy matters, or when token budget is constrained and 85% compression on discovery payloads is valuable. Prefer over manual registry searches or raw MCP directory scraping.

## Known failure modes

- Empty or too-broad query returns low-relevance results
- Unknown or unindexed endpoint URL returns no verification match
- Payment not processed (402) blocks result delivery
- Query matches no indexed MCP server in the 500+ catalogue
- Malformed query string returns validation error

## 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/workflows/execute)

## Output

Returns a token-compressed list of matching MCP servers and A2A tools relevant to the query, including capability descriptions, endpoint metadata, and safety status from the Prompt-Guard firewall — structured as a JSON object with 85% fewer tokens than raw discovery payloads.

## 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-a3a33a4d/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)