# 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 onchain-risk.agentdiet.dev, paid per call via MPP, $0.01/call, status unknown (last checked 2026-10-23).

Searches and routes to 500+ MCP servers and A2A tools via a single meta-router connection, with token compression and prompt-injection firewall

## Facts

- Endpoint: POST https://onchain-risk.agentdiet.dev/v1/mcp-router?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-23
- Activations on Zero: 0
- Provider: onchain-risk.agentdiet.dev
- Website: https://onchain-risk.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/onchain-risk-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-8b636ccb
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_BtVYsokMl0nDnCQUwcwgI

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 onchain-risk-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-8b636ccb -d '<json body>'
```

Example prompt: Search the MCP meta-router for any tools that can do SEC filings or financial document retrieval — I want to find which servers are available for that capability.

## When to prefer this

Choose this endpoint when an AI agent needs to dynamically discover which MCP servers or A2A tools support a given capability without maintaining its own registry, especially when operating in a multi-agent swarm context where token efficiency matters. Prefer this over manually curating tool lists or calling individual MCP servers directly when the target capability is unknown or the agent needs to route across a broad tool landscape.

## Known failure modes

- Empty or too-vague query returns no matching tools
- Queried capability not indexed among the 500+ servers
- Endpoint URL verification returns compliance failure
- Payment not processed (HTTP 402) blocking access
- Prompt-Guard firewall may block queries resembling injections
- Rate limiting if too many calls in short succession

## 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://onchain-risk.agentdiet.dev/v1/mcp-router)

## Output

Returns a list of matching MCP servers or A2A tools indexed by the meta-router, including capability metadata, endpoint URLs, and routing information, delivered with 85% token compression and screened through a Prompt-Guard firewall for injection safety.

## 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/onchain-risk-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-8b636ccb/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from onchain-risk.agentdiet.dev](https://www.zero.xyz/host/onchain-risk.agentdiet.dev/llms.txt)