# 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 an index of 500+ MCP servers and A2A tools by capability query, returning matching endpoints with compressed context and prompt-guard filtering.

## Facts

- Endpoint: GET https://agentdiet.dev/v1/workflows/b2b-lead-enrichment?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-da84d07b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_zcXpHzd9nsHPp4tMC975B

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-da84d07b
```

Example prompt: Search the MCP tool index for any servers or A2A agents that handle 'company enrichment' — I want to find what's available before wiring something up.

## When to prefer this

Choose this endpoint when an agent needs to dynamically discover which MCP servers or A2A tools support a given capability, rather than hardcoding tool references. Especially useful when building multi-agent swarms that need to route tasks to specialized sub-agents, or when verifying that a known endpoint URL is indexed and reachable. The 85% token compression makes it suitable for context-constrained agents.

## Known failure modes

- Empty query string returns validation error (minLength:1 not met)
- No matching tools found for niche or misspelled capability query
- Endpoint URL verification fails if the target is offline or non-compliant
- Response schema is generic object — downstream parsing may require defensive handling
- Service may return stale index data if 500+ tool catalog is not freshly synced

## 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/workflows/b2b-lead-enrichment)

## Output

Returns a structured object listing matching MCP servers or A2A tool descriptors relevant to the capability query, with compressed context (up to 85% token reduction) and prompt-guard filtered results. May also include verification status if an endpoint URL is submitted as the query.

## 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-da84d07b/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)