# 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/v1/universal-mcp-gateway?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-4f47d1a1
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_3NCmBgMUOnFwhTsFR0n69

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-4f47d1a1
```

Example prompt: Search the MCP tool index for any servers that handle SEC filings or company enrichment — I need to find the right tool to plug into my agent pipeline.

## When to prefer this

Choose this endpoint when an agent needs to dynamically discover which MCP or A2A tools exist for a given capability, rather than hard-coding tool integrations. Especially useful for swarm orchestrators, agent pipelines that need runtime tool selection, or developers evaluating MCP server options before integration. Prefer this over manual registry browsing when token budget is a concern, since results are compressed.

## Known failure modes

- Empty or vague query returns low-confidence or no results
- Queried endpoint URL may not be reachable or compliant, returning a validation error
- Index may not reflect real-time availability of all 500+ MCP servers
- Payment required (HTTP 402) if x402 micropayment header is missing or invalid
- Overly broad queries may return too many loosely matched tools

## 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/universal-mcp-gateway)

## Output

Returns a list of matching MCP servers or A2A tools relevant to the query, with token-compressed capability descriptions (claiming ~85% compression) and safety-filtered output via a Prompt-Guard firewall. Results include endpoint metadata, tool 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-4f47d1a1/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)