# 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 agentdiet.dev, paid per call via MPP, $0.01/call, status unknown (last checked 2026-10-21).

Searches and routes to 500+ MCP servers and A2A tools through a single connection with token compression and prompt-injection firewall protection.

## Facts

- Endpoint: GET https://agentdiet.dev/v1/broker/execute?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Provider: agentdiet.dev
- Website: https://agentdiet.dev
- Canonical page: https://www.zero.xyz/c/agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-proxy-swarm-router-7bab4e2f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_yHVwH8o2bDjd_e0HON_Ya

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 agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-proxy-swarm-router-7bab4e2f
```

Example prompt: Search the MCP and A2A tool index for 'SEC filings' — I need to find which available tools can pull financial disclosure data for my agent pipeline.

## When to prefer this

Choose this endpoint when an agent needs to dynamically discover and route to external MCP or A2A tools without managing multiple connections, especially when token budget is constrained (85% compression) or when safety filtering against prompt injection is required. Prefer this over direct tool registries when building multi-agent swarms that need a single unified capability search layer.

## Known failure modes

- Empty query string returns validation error
- No matching tools found for obscure or misspelled capability query
- Endpoint URL verification returns unrecognized or unindexed status
- Rate limit or payment failure (402) if USDC balance is insufficient
- Prompt-Guard firewall may block queries containing adversarial injection patterns

## 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://agentdiet.dev/v1/broker/execute)

## Output

Returns a list of matching MCP servers or A2A tools relevant to the search query, with compressed tool manifests, routing metadata, and safety validation status from the Prompt-Guard firewall. Results are 85% token-compressed compared to raw tool schemas.

## 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/agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-proxy-swarm-router-7bab4e2f/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agentdiet.dev](https://www.zero.xyz/host/agentdiet.dev/llms.txt)