# DeFi Token Due Diligence via Universal A2A & MCP Tool Discovery Router

> DeFi Token Due Diligence via Universal A2A & MCP Tool Discovery Router is a paid API for AI agents from prompt-guard.agentdiet.dev, paid per call via MPP, $0.01/call, status unknown (last checked 2026-10-21).

Searches 500+ indexed MCP servers and A2A tools for a given capability query or validates an endpoint URL, returning compressed tool discovery results filtered through a Prompt-Guard firewall.

## Facts

- Endpoint: GET https://prompt-guard.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: prompt-guard.agentdiet.dev
- Website: https://prompt-guard.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/prompt-guard-agentdiet-dev-defi-token-due-diligence-via-universal-a2a-d404065f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_NHsPtx8C8EGAiM2ua4Oqo

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 prompt-guard-agentdiet-dev-defi-token-due-diligence-via-universal-a2a-d404065f
```

Example prompt: Search the agentdiet MCP and A2A tool index for any servers or tools that handle 'DeFi token due diligence' — I want to see which capabilities are available and get compressed results I can act on.

## When to prefer this

Use this endpoint when you need a single-connection way to discover which MCP servers or A2A tools support a given capability, especially when token budget is a concern (85% compression). Prefer this over manually querying individual MCP registries or building your own tool index. Also useful for validating whether a specific remote agent URL is live and compliant before integrating it into a swarm.

## Known failure modes

- Empty query string returns validation error
- No matching tools found for obscure capability queries — returns empty result set
- Payment not received (HTTP 402) — endpoint requires $0.01 USDC via x402 before responding
- Endpoint URL verification may time out if the target is slow or offline
- Firewall may block results flagged as prompt-injection risks, resulting in fewer returned tools than expected

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

## Output

Returns a compressed list of matching MCP servers or A2A tools relevant to the query, including tool descriptors and routing metadata, filtered through the Prompt-Guard firewall to remove unsafe or non-compliant results. Token usage is reduced by approximately 85% versus raw index responses.

## 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/prompt-guard-agentdiet-dev-defi-token-due-diligence-via-universal-a2a-d404065f/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from prompt-guard.agentdiet.dev](https://www.zero.xyz/host/prompt-guard.agentdiet.dev/llms.txt)