# 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 token-intel.agentdiet.dev, paid per call via MPP, $0.01/call, status unknown (last checked 2026-10-28).

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

## Facts

- Endpoint: POST https://token-intel.agentdiet.dev/v1/x402-broker?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-28
- Activations on Zero: 0
- Provider: token-intel.agentdiet.dev
- Website: https://token-intel.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/token-intel-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-proxy-16980109
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_XeTNtS-cte_gPonDctFG2

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 token-intel-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-proxy-16980109 -d '<json body>'
```

Example prompt: Search the meta-router index for MCP servers and A2A tools that handle 'context compression' — I want to find the best available tool through a single connection with the prompt firewall active.

## When to prefer this

Choose this endpoint when an agent needs to discover, evaluate, or route to one of 500+ MCP servers or A2A tools through a single connection rather than managing multiple integrations. It is especially useful when token budget is constrained (85% compression), when prompt safety is a concern (built-in firewall), or when the target capability is unknown and needs to be searched by description.

## Known failure modes

- Empty or too-broad query returns low-relevance or no results
- Query for an unsupported capability domain returns empty matches
- Malicious or injection-like queries blocked by Prompt-Guard firewall returning a rejection response
- Network timeout if the meta-router is indexing or refreshing its 500+ server list
- Payment failure if x402 micropayment is not correctly attached

## 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://token-intel.agentdiet.dev/v1/x402-broker)

## Output

Returns a structured object listing matching MCP servers and/or A2A tools relevant to the query, with tool metadata and routing information, delivered with up to 85% token compression and filtered through a Prompt-Guard firewall to block adversarial prompt injections.

## 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/token-intel-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-proxy-16980109/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from token-intel.agentdiet.dev](https://www.zero.xyz/host/token-intel.agentdiet.dev/llms.txt)