# 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 workflows.agentdiet.dev, paid per call via MPP, $0.01/call, status unknown (last checked 2026-10-21).

Searches and routes to 500+ MCP servers and A2A tools by capability query, returning token-compressed results through a prompt-injection firewall

## Facts

- Endpoint: GET https://workflows.agentdiet.dev/v1/b2b-osint-dag?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Provider: workflows.agentdiet.dev
- Website: https://workflows.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/workflows-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-proxy-f43cc36e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Rn_wlsc5xq0mkrJptkPR5

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 workflows-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-proxy-f43cc36e
```

Example prompt: Search the MCP and A2A tool index for capabilities related to 'SEC filings' — I want to find which servers or tools can handle that so I can route my agent to the right one.

## When to prefer this

Choose this endpoint when an agent needs to dynamically discover which MCP server or A2A tool to call for a given capability, rather than hardcoding a specific tool. Ideal for swarm architectures or meta-agents that need to route tasks across a large, evolving tool ecosystem. The built-in prompt-injection firewall makes it safer than querying tool registries directly.

## Known failure modes

- Empty or ambiguous query returns no relevant matches
- Query too broad may return many loosely matched tools
- Endpoint URL verification may fail for offline or private servers
- Token-compressed output may omit fine-grained tool details
- Rate limit or payment required (x402) if quota exceeded

## 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://workflows.agentdiet.dev/v1/b2b-osint-dag)

## Output

Returns a list of matching MCP servers or A2A tools relevant to the query, with token-compressed capability descriptions, endpoint metadata, and routing information, all filtered through a Prompt-Guard firewall to block injected malicious content.

## 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/workflows-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-proxy-f43cc36e/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from workflows.agentdiet.dev](https://www.zero.xyz/host/workflows.agentdiet.dev/llms.txt)