# 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 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 matching endpoints with token-compressed metadata and prompt-injection firewall protection.

## Facts

- Endpoint: GET https://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: agentdiet.dev
- Website: https://agentdiet.dev
- Canonical page: https://www.zero.xyz/c/agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-proxy-swarm-router-2cde98df
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_0vX1JJGisgnNmwkJFNdHG

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 agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-proxy-swarm-router-2cde98df
```

Example prompt: Search the agentdiet tool index for MCP servers that handle SEC filings retrieval — I want to find what's available and route my agent to the right one.

## When to prefer this

Choose this endpoint when you need to discover which MCP servers or A2A tools exist for a given capability without knowing specific endpoint URLs in advance. It is especially useful for agent orchestration pipelines that need to dynamically route to the best available tool, or when building swarm architectures that must enumerate available capabilities. Prefer this over manually curated lists when the tool landscape changes frequently or when you need token-efficient tool discovery with built-in prompt injection protection.

## Known failure modes

- Empty or vague query returns no meaningful matches
- Query for a niche capability not yet indexed returns empty results
- Endpoint URL verification returns invalid or unreachable status if the target is offline
- Overly broad queries may return too many results with insufficient differentiation
- Service unavailability returns non-200 response with no tool data

## 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://agentdiet.dev/v1/workflows)

## Output

Returns a list of matching MCP servers and A2A tools from the 500+ indexed endpoints, including their capabilities, metadata, and compressed descriptions (85% token reduction). Results are filtered through a Prompt-Guard firewall to block injection attacks before being returned to the calling agent.

## 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/agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-proxy-swarm-router-2cde98df/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agentdiet.dev](https://www.zero.xyz/host/agentdiet.dev/llms.txt)