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

Searches an index of 500+ MCP servers and A2A tools by capability query and returns matching endpoints with token-compressed routing metadata via a prompt-guarded proxy

## Facts

- Endpoint: GET https://agentdiet.dev/v1/a2a-mesh?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Provider: agentdiet.dev
- Website: https://agentdiet.dev
- Canonical page: https://www.zero.xyz/c/agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-proxy-swarm-router-c64f5efb
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_rLddVvNQWP2BZW5g8uFuj

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 agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-proxy-swarm-router-c64f5efb
```

Example prompt: Search the A2A mesh for MCP servers that handle SEC filings — I need to find a tool that can pull company financial disclosures for my research agent.

## When to prefer this

Choose this endpoint when an AI agent needs to dynamically discover, search, or route to one of hundreds of MCP or A2A tools without maintaining its own registry. It is especially useful when token budget is a concern (85% compression), when prompt injection safety is required, or when building multi-agent swarms that need a single-connection hub to delegate capability queries.

## Known failure modes

- Empty or overly broad query returns too many irrelevant results
- Highly specific or niche queries return no matches if not indexed
- Payment required error (HTTP 402) if x402 micropayment not fulfilled
- Index may be stale if newly registered MCP servers haven't been crawled
- Query targeting an endpoint URL for verification may return incomplete compliance data

## 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://agentdiet.dev/v1/a2a-mesh)

## Output

Returns a list of matching MCP servers and A2A tool endpoints from a 500+ item index, with capability descriptions and routing metadata, delivered through a token-compressed (up to 85% reduction) and Prompt-Guard-firewalled proxy connection.

## 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/agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-proxy-swarm-router-c64f5efb/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agentdiet.dev](https://www.zero.xyz/host/agentdiet.dev/llms.txt)