# 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 2026-10-28).

Searches and routes across 500+ MCP servers and A2A tools via a single connection with token compression and prompt injection firewall

## Facts

- Endpoint: POST https://token-intel.agentdiet.dev/v1/x402-gateway?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-28
- 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-46065655
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_plOCaQ4aiGxVqrO5xUhGL

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-46065655 -d '<json body>'
```

Example prompt: Search the MCP and A2A tool index for any available capabilities related to 'SEC filings' and return the best-matching tools with compressed responses.

## When to prefer this

Choose this endpoint when an AI agent needs to dynamically discover which MCP server or A2A tool to call for a given capability, rather than hardcoding tool integrations. Especially useful in multi-agent swarms where the right tool is not known ahead of time, or when you want a single connection that proxies across 500+ tools with built-in token compression and prompt injection protection.

## Known failure modes

- Query too vague — returns no matching tools or broad irrelevant results
- Queried endpoint URL not found in index — returns empty or null result
- Prompt injection attempt detected by Prompt-Guard firewall — request blocked
- Payment not processed (x402) — 402 response requiring USDC payment before access
- Upstream MCP server unavailable — partial results or timeout
- Invalid query format — missing required 'query' field 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://token-intel.agentdiet.dev/v1/x402-gateway)

## Output

Returns a list of matching MCP servers or A2A tools relevant to the search query, with compressed metadata (up to 85% token reduction) and prompt-injection-filtered responses indicating tool names, capabilities, and connection details.

## 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-46065655/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)