# 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 2026-10-22).

Searches an index of 500+ MCP servers and A2A tools by capability query, returning compressed, firewall-filtered results to route agent calls efficiently.

## Facts

- Endpoint: GET https://token-intel.agentdiet.dev/v1/tool-search?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-22
- 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-1133c900
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_zEeQNqo8R1r9xcogRQgdF

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-1133c900
```

Example prompt: Search the MCP and A2A tool index for anything that handles 'context compression' — I want to find available tools I can route my agent through for token-efficient calls.

## 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 a specific tool. It is especially useful in swarm orchestration, when building tool-agnostic pipelines, or when you want a single connection point that indexes 500+ servers with built-in prompt injection protection and token compression.

## Known failure modes

- Empty query returns validation error (minLength:1 not met)
- No matching tools found for obscure capability query returns empty result set
- Endpoint URL verification fails if the URL is malformed or unreachable
- Rate limiting or payment failure (HTTP 402) if x402 USDC payment is not supplied
- Index may be stale if recently added MCP servers haven't been crawled yet

## 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/tool-search)

## Output

Returns a list of matching MCP servers or A2A tools relevant to the query, with compressed metadata (85% token reduction) and Prompt-Guard firewall filtering applied, including tool names, capabilities, and routing information.

## 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-1133c900/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)