# 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 domain-osint.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 tools by capability query, returning compressed, firewall-filtered results via a single connection

## Facts

- Endpoint: GET https://domain-osint.agentdiet.dev/v1/execute?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Provider: domain-osint.agentdiet.dev
- Website: https://domain-osint.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/domain-osint-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-e09cdf90
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_2hx1kBghkZ_WtwrebQCC0

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 domain-osint-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-e09cdf90
```

Example prompt: Search the MCP and A2A tool index for servers that offer GitHub security auditing — I need to find the right tool without setting up a dozen separate connections.

## When to prefer this

Choose this endpoint when you need to discover or route to one of many MCP servers or A2A tools without managing individual connections, especially when token budget is a concern (85% compression claimed) or when you want firewall-filtered results. Prefer it over maintaining your own MCP server registry or manually querying individual tool catalogs.

## Known failure modes

- Empty or too-broad query returns too many results with low relevance
- URL verification of a non-existent or offline endpoint returns an error or null result
- Firewall may block results that superficially match but are flagged as unsafe
- Index may not include newly added MCP servers not yet crawled
- HTTP 402 payment required if call quota is exceeded without payment

## 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://domain-osint.agentdiet.dev/v1/execute)

## Output

Returns a filtered, token-compressed list of matching MCP servers and A2A tools relevant to the query, including endpoint metadata, capability descriptions, and routing information — filtered through a Prompt-Guard firewall to remove unsafe or malicious 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/domain-osint-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-e09cdf90/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from domain-osint.agentdiet.dev](https://www.zero.xyz/host/domain-osint.agentdiet.dev/llms.txt)