# 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 and discovers capabilities across 500+ MCP servers and A2A tools via a single meta-router endpoint with token compression and prompt-injection firewall.

## Facts

- Endpoint: GET https://mesh.agentdiet.dev/v1/crypto-alpha-dag?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-cd25245e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_RD5DoSm1I0YZoFgretyLc

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-cd25245e
```

Example prompt: Search the MCP and A2A tool index for anything that handles 'SEC filings' — I want to know which servers are available and what capabilities they expose, compressed so I'm not wasting tokens.

## When to prefer this

Choose this endpoint when an AI agent needs to dynamically discover new tools or MCP servers at runtime without hardcoding integrations, or when you need to verify whether a specific endpoint is indexed and safe. It is especially valuable in multi-agent swarm architectures that need a single discovery layer for 500+ tools, and when token budget is a concern due to the built-in 85% compression.

## Known failure modes

- Empty or vague query returns low-relevance results
- Queried endpoint URL not in the index returns no match
- Upstream MCP server data is stale or unavailable
- Prompt-Guard firewall may block queries containing injection patterns
- x402 payment failure results in 402 response and no data returned

## 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/crypto-alpha-dag)

## Output

Returns a compressed list of matching MCP servers and A2A tools relevant to the capability query, including tool metadata, endpoint details, and relevance signals — with up to 85% token reduction versus raw results. May also return verification status if an endpoint URL is supplied.

## 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-cd25245e/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)