# 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 queries across 500+ indexed MCP servers and A2A tools via a single connection, with token compression and prompt-guard firewall.

## Facts

- Endpoint: POST https://email-verify.agentdiet.dev/v1/swarm-router?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-54125ab9
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_JAna3owOMwIRbSwgvcDrQ

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-54125ab9 -d '<json body>'
```

Example prompt: Search the swarm router for any available tools that do SEC filings or company enrichment — I want to find the right MCP server to route that kind of query through.

## When to prefer this

Use this endpoint when an agent needs to dynamically discover which MCP server or A2A tool handles a given capability at runtime, rather than hardcoding tool integrations. It is especially useful for swarm-style architectures that need a single routing layer across many tools, or when token efficiency (85% compression) is a priority.

## Known failure modes

- Empty or too-short query string returns validation error
- No matching tools found for niche or misspelled capability query
- Firewall blocks adversarial or prompt-injection queries
- Payment required (HTTP 402) if x402 payment header is missing or invalid
- Rate limiting if too many queries are sent without idempotency key

## 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-router)

## Output

Returns a list of matching MCP servers or A2A tools relevant to the search query, with routing metadata, capability descriptions, and compressed response data filtered through a Prompt-Guard firewall.

## 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-54125ab9/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)