# 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 agent tools by capability query and returns compressed, firewall-filtered results via a single meta-router connection

## Facts

- Endpoint: GET https://token-intel.agentdiet.dev/v1/broker/execute?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-4fc6e6a6
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Rz4C6VhBqYn7iBx70mmSh

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-4fc6e6a6
```

Example prompt: Search the MCP and A2A tool index for anything that handles SEC filings or company enrichment — I need to find the best available agent tool for that capability.

## When to prefer this

Choose this endpoint when an AI agent needs to dynamically discover which MCP server or A2A tool to use for a given capability, rather than hardcoding a specific tool. Especially useful for swarm architectures where the right tool is unknown at design time, or when token budget is constrained and compressed metadata is valuable. Prefer over manual tool registries when coverage of 500+ servers is needed.

## Known failure modes

- Empty query string returns validation error
- No matching tools found for obscure capability queries
- Firewall blocks potentially malicious or prompt-injection queries
- Upstream MCP server unavailability causes incomplete results
- Payment failure via x402 prevents execution
- Overly broad queries return too many low-relevance results

## 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/broker/execute)

## Output

Returns a list of matching MCP servers and A2A tool endpoints relevant to the capability query, with token-compressed metadata (up to 85% compression) and Prompt-Guard firewall filtering applied. Response is a generic JSON object containing matched tools, their descriptions, 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-4fc6e6a6/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)