# 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 token-intel.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, returning token-compressed results through a prompt-guard firewall

## Facts

- Endpoint: GET https://token-intel.agentdiet.dev/api/mcp/audit?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Provider: token-intel.agentdiet.dev
- Website: https://token-intel.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/token-intel-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-proxy-0a0c97de
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_uY1uJlj4YC6E0pURI8nqg

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 token-intel-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-proxy-0a0c97de
```

Example prompt: Search the MCP tool index for servers that can handle SEC filings and company enrichment — I want to see what's available before wiring up my agent.

## When to prefer this

Choose this endpoint when an agent needs to dynamically discover which MCP server or A2A tool supports a given capability without hardcoding integrations, or when you want a single-connection proxy to 500+ tools with built-in token compression and prompt injection protection. Prefer it over direct MCP server registries when token budget is tight or when safety filtering of tool responses is required.

## Known failure modes

- Empty query string returns validation error (query is required, minLength 1)
- Query matches no indexed tools — returns empty result set
- Upstream MCP index unavailable — may return 503 or timeout
- Payment not fulfilled — returns HTTP 402 requiring x402 Base USDC payment
- Prompt-Guard firewall blocks query flagged as potentially malicious — returns rejection with firewall reason

## 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://token-intel.agentdiet.dev/api/mcp/audit)

## Output

Returns a compressed, firewall-filtered list of matching MCP servers and A2A tools from a 500+ entry index, including capability descriptions and routing metadata, with approximately 85% token reduction compared to raw tool listings.

## 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/token-intel-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-proxy-0a0c97de/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from token-intel.agentdiet.dev](https://www.zero.xyz/host/token-intel.agentdiet.dev/llms.txt)