# 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 and routes queries across 500+ indexed MCP servers and A2A tools with token compression and prompt injection firewall protection

## Facts

- Endpoint: GET https://token-intel.agentdiet.dev/v1/crypto-alpha-dag?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-eca54e04
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_f2U7prnOB17Ec4oTJ2OSM

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-eca54e04
```

Example prompt: Search the MCP tool index for any servers or A2A agents that can handle SEC filings analysis — I need the best available option routed through the safe proxy.

## When to prefer this

Choose this endpoint when an agent needs to dynamically discover which MCP server or A2A tool can fulfill a capability at runtime, rather than hardcoding tool endpoints. Especially useful for multi-agent swarms that need to delegate tasks to specialized tools, for safe-proxied access to external MCP servers with prompt injection protection, or when token budget is a concern and compressed tool metadata is needed. Not suited for direct data retrieval tasks like weather, translation, or image generation.

## Known failure modes

- Empty or vague query returns no meaningful matches
- Queried capability not covered by any of the 500+ indexed tools
- Upstream MCP server is offline or unresponsive at routing time
- Prompt-Guard firewall blocks a legitimate tool due to false positive
- Query too broad returns too many low-relevance results
- HTTP 402 payment not fulfilled, request rejected

## 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/crypto-alpha-dag)

## Output

Returns a list of matching MCP servers and A2A tool endpoints relevant to the search query, including capability metadata, compressed tool descriptions, and routing information — filtered through the Prompt-Guard firewall to prevent prompt injection from upstream tools.

## 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-eca54e04/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)