# 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 and routes queries across 500+ indexed MCP servers and A2A tools with token compression and prompt injection firewall

## Facts

- Endpoint: GET https://domain-osint.agentdiet.dev/v1/crypto-alpha-dag?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-e3c27996
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Dm6D4hL3e-PQgiA2d496z

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-e3c27996
```

Example prompt: Search the MCP and A2A tool index for any servers that support SEC filings or company enrichment so I can route my agent there directly.

## When to prefer this

Use this endpoint when an AI agent needs to dynamically discover the right MCP server or A2A tool for a capability at runtime, especially when the specific tool URL is unknown. Prefer it over hardcoded tool lists when building swarm agents or meta-orchestrators that must route across many third-party services. The 85% token compression makes it efficient for LLM context budgets, and the Prompt-Guard firewall makes it safer than direct proxy calls to unknown endpoints.

## Known failure modes

- Empty or too-generic query returns no relevant results
- Query matches no indexed tools — empty result set returned
- Endpoint URL verification fails if target is offline or malformed
- Token compression artifacts may truncate tool descriptions for very long results
- Rate limit or 402 payment required if quota exceeded

## 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/crypto-alpha-dag)

## Output

Returns a ranked list of matching MCP servers or A2A tool endpoints with token-compressed metadata, capability descriptions, and routing recommendations filtered through the 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/domain-osint-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-e3c27996/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)