# 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 a meta-index of 500+ MCP servers and A2A agent tools by capability query, returning compressed, firewall-filtered results with a single connection

## 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-5733cae1
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_1EKAE_dGoNc3hDdc_7nhv

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-5733cae1
```

Example prompt: Search the MCP and A2A tool index for agents that can handle 'SEC filings' — I want to know which tools are available and what they do.

## When to prefer this

Choose this endpoint when an AI agent or swarm needs to dynamically discover which MCP servers or A2A tools support a given capability without maintaining its own registry. It is especially useful when token budget is a constraint (85% compression) or when safety filtering of tool metadata is required. Prefer this over manually curated tool lists when the agent ecosystem is large or rapidly changing.

## Known failure modes

- Empty query string returns validation error (query minLength:1)
- No matching tools found for niche or misspelled capability query
- Prompt-Guard firewall blocks results containing potentially unsafe tool descriptions
- x402 payment failure if USDC balance is insufficient (endpoint costs $0.01 per call)
- Upstream index unavailable leading to partial or stale results

## 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 filtered, token-compressed list of matching MCP servers and A2A tools from a 500+ server index, including tool names, capability descriptions, and connection metadata — all screened through a Prompt-Guard firewall to remove unsafe or malicious tool entries.

## 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-5733cae1/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)