# Universal A2A & MCP Tool Discovery, Safe-Proxy & Swarm Router (DeFi Token Due Diligence)

> Universal A2A & MCP Tool Discovery, Safe-Proxy & Swarm Router (DeFi Token Due Diligence) is a paid API for AI agents from workflows.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 routes with prompt-guard firewall protection for DeFi token due diligence workflows.

## Facts

- Endpoint: GET https://workflows.agentdiet.dev/v1/workflows/defi-token-due-diligence?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Provider: workflows.agentdiet.dev
- Website: https://workflows.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/workflows-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-proxy-c0c701be
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_gT8lPBx6f4NSEVFb6vFtQ

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 workflows-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-proxy-c0c701be
```

Example prompt: Search the agentdiet MCP meta-router for tools that can do DeFi token due diligence — specifically ones covering on-chain risk, DEX liquidity, and smart contract security.

## 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 hardcoding tool lists — especially useful for DeFi/on-chain due diligence workflows where multiple specialized tools need to be orchestrated. Prefer it over manual tool registries when you need token-compressed routing and prompt injection firewall protection in a single connection.

## Known failure modes

- Empty query string returns validation error (minLength:1 not met)
- No matching tools found for obscure or misspelled capability queries
- Endpoint URL verification fails if target is offline or non-compliant
- Payment required (HTTP 402) if x402 micropayment header is missing or invalid
- Rate limiting if too many queries in a short window

## 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://workflows.agentdiet.dev/v1/workflows/defi-token-due-diligence)

## Output

Returns a compressed manifest of matched MCP servers and A2A tool endpoints relevant to the capability query, including routing metadata and prompt-guard-filtered safe-proxy connection details, delivered with up to 85% token compression.

## 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/workflows-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-proxy-c0c701be/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from workflows.agentdiet.dev](https://www.zero.xyz/host/workflows.agentdiet.dev/llms.txt)