# 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 2026-10-23).

Searches and routes queries across 500+ indexed MCP servers and A2A tools, returning compressed, firewall-screened results via a single connection.

## Facts

- Endpoint: POST https://domain-osint.agentdiet.dev/v1/crypto-alpha-dag?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-23
- 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-a8e4be8d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_j11H6G1aVuDDGvYE0FZ5A

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-a8e4be8d -d '<json body>'
```

Example prompt: Search the MCP/A2A tool index for a capability that handles 'context compression' and return the best matching tools with compressed manifests.

## When to prefer this

Choose this endpoint when an agent needs to dynamically discover and route to the right specialized tool from a large catalog without maintaining its own index, especially when prompt-injection safety screening and token compression are priorities. Prefer it over hardcoded tool registries or raw MCP server lists when the target capability is unknown or the agent operates in a multi-tool swarm context.

## Known failure modes

- Query string too vague returns low-confidence or empty match list
- Endpoint URL verification against unknown or unlisted servers returns not-found
- Firewall flags a legitimate tool response as suspicious, blocking delivery
- Token budget exceeded on very broad queries returning many results
- Payment not confirmed via x402 returns 402 Payment Required

## 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

A structured list of matched MCP servers or A2A tools relevant to the query, with 85% token-compressed manifests, Prompt-Guard firewall screening applied to responses, and routing metadata to invoke the selected capability.

## 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-a8e4be8d/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)