# 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 mcp-security.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 compressed, firewall-screened tool discovery results through a single meta-router connection.

## Facts

- Endpoint: GET https://mcp-security.agentdiet.dev/v1/workflows?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Provider: mcp-security.agentdiet.dev
- Website: https://mcp-security.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/mcp-security-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-08819a80
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Yi-z1Cq5CWugOUxjggzag

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 mcp-security-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-08819a80
```

Example prompt: Search the MCP tool index for any servers that support SEC filings or financial document retrieval — I need to find a safe, token-efficient way to route that capability into my agent pipeline.

## When to prefer this

Choose this endpoint when an agent needs to dynamically discover which MCP servers or A2A tools are available for a given capability without hardcoding individual tool connections. Especially valuable when building multi-agent swarms, when you want 85% token compression on tool metadata, or when you need a Prompt-Guard firewall screening tool responses before they reach your agent context.

## Known failure modes

- Empty query string returns validation error (minLength:1 required)
- No matching tools found for the query returns empty result set
- Upstream MCP server registry unavailable causes degraded results
- x402 payment not fulfilled results in 402 Payment Required response
- Query too vague may return low-relevance or overly broad tool matches

## 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://mcp-security.agentdiet.dev/v1/workflows)

## Output

A compressed, token-optimized list of matching MCP servers and A2A tools from a 500+ item index, including capability descriptions, endpoint metadata, and safety-screened routing information. Results pass through a Prompt-Guard firewall to block malicious tool responses.

## 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/mcp-security-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-08819a80/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from mcp-security.agentdiet.dev](https://www.zero.xyz/host/mcp-security.agentdiet.dev/llms.txt)