# 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 email-verify.agentdiet.dev, paid per call via MPP, $0.01/call, status unknown (last checked 2026-10-23).

Searches and routes across 500+ indexed MCP servers and A2A tools via a single meta-router endpoint with token compression and prompt firewall protection

## Facts

- Endpoint: POST https://email-verify.agentdiet.dev/v1/swarm-execute?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-23
- Activations on Zero: 0
- Provider: email-verify.agentdiet.dev
- Website: https://email-verify.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/email-verify-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-9150e8f5
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_P9lJCAdykPQwuXvIZgWsN

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 email-verify-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-9150e8f5 -d '<json body>'
```

Example prompt: Search the MCP and A2A tool index for any available servers that handle 'SEC filings' or 'company enrichment' — I want to find the best tool to pull financial data for a public company.

## When to prefer this

Choose this endpoint when an AI agent needs to dynamically discover which MCP server or A2A tool best handles a given capability at runtime, rather than hardcoding tool endpoints. Ideal for agent orchestration layers that need to route to specialized tools without maintaining a static registry. The built-in Prompt-Guard firewall and 85% token compression make it suitable for high-throughput agentic pipelines.

## Known failure modes

- Empty or vague query returns low-confidence or no matches
- Queried capability not indexed among the 500+ tools returns empty result
- Payment not included or invalid x402 header results in 402 response
- Malformed query (minLength not met) returns 400 validation error
- Idempotency key reuse may return cached prior response rather than fresh result

## 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://email-verify.agentdiet.dev/v1/swarm-execute)

## Output

Returns matched MCP server or A2A tool metadata from an index of 500+ tools, with token-compressed capability descriptions and routing information for the best-matched tools based on the search query.

## 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/email-verify-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-9150e8f5/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from email-verify.agentdiet.dev](https://www.zero.xyz/host/email-verify.agentdiet.dev/llms.txt)