# 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 an index of 500+ MCP servers and A2A tools by capability query, returning compressed, firewall-filtered routing results for agent swarms

## Facts

- Endpoint: GET https://workflows.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: 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-4569c5be
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_xSJGqSfbeDhpwV12easLC

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-4569c5be
```

Example prompt: Search the MCP and A2A tool index for any servers that support 'SEC filings' or 'company enrichment' — I want a compressed, firewall-screened list I can route my agent swarm through.

## When to prefer this

Choose this endpoint when you need to dynamically discover and route to MCP or A2A tools at runtime without maintaining your own tool registry, especially when token budget is constrained (85% compression) or when you need firewall-screened tool metadata for untrusted swarm environments.

## Known failure modes

- Empty query string returns validation error
- No matching tools found for obscure capability queries returns empty result set
- Endpoint URL verification fails if the URL is not indexed
- Rate limiting or 402 payment required if per-call quota exceeded
- Firewall may block queries flagged as prompt injection attempts

## 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/workflows)

## Output

Returns a compressed (up to 85% token reduction) list of matching MCP servers or A2A tools from the 500+ item index, filtered through the Prompt-Guard firewall, with routing metadata and capability descriptions suitable for agent swarm consumption.

## 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-4569c5be/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)