# 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 tool descriptions and safe-proxied routing through a prompt-guard firewall.

## Facts

- Endpoint: GET https://domain-osint.agentdiet.dev/v1/swarm-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-c6bed941
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ucOJ76Cl3108-idZUcx-q

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-c6bed941
```

Example prompt: Search your MCP and A2A tool index for anything that handles 'SEC filings' or 'company enrichment' and tell me which tools are available and how to call them.

## When to prefer this

Choose this endpoint when an AI agent needs to dynamically discover which MCP servers or A2A tools are available for a given capability without maintaining its own tool registry. Especially useful when you want a single connection point that applies prompt-guard safety filtering and token compression before returning tool metadata, reducing both security risk and context overhead compared to querying multiple registries directly.

## Known failure modes

- Empty query string returns validation error
- No matching tools found for niche query returns empty result set
- Rate limiting or payment failure (HTTP 402) if per-call credit is exhausted
- Upstream MCP server index unavailable returns 503
- Malformed endpoint URL passed as query may return unverified or null routing 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://domain-osint.agentdiet.dev/v1/swarm-execute)

## Output

Returns a compressed manifest of matching MCP servers or A2A tools relevant to the query, including tool names, descriptions, and routing metadata, filtered through a Prompt-Guard firewall to remove malicious content. Response is token-compressed by up to 85%.

## 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-c6bed941/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)