# 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 and routes across 500+ MCP servers and A2A tools via a single connection, with token compression and prompt injection firewall.

## Facts

- Endpoint: GET https://agentdiet.dev/v1/workflows/rag-context-sanitizer?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-9c7b70bc
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ltPaa7E1EooFtsb3I4Kuk

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-9c7b70bc
```

Example prompt: Search the agentdiet tool index for MCP servers and A2A tools that can handle 'company enrichment' — I want to find what's available and route my request through the safe proxy.

## When to prefer this

Choose this endpoint when an AI agent needs to dynamically discover which MCP server or A2A tool to use for a given capability, especially when token budget is a concern or when prompt injection safety is required. Prefer this over direct MCP connections when you need a single-connection meta-router across hundreds of servers rather than managing individual integrations.

## Known failure modes

- Empty or vague query returns no matching tools
- Query string too short (minLength:1 not met) returns validation error
- Requested capability not indexed among the 500+ servers returns empty result set
- Prompt-Guard firewall blocks queries it classifies as injection attempts
- Upstream MCP server unavailable causes partial or degraded results

## 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/rag-context-sanitizer)

## Output

Returns a filtered list of matching MCP servers or A2A tool endpoints relevant to the query, with compressed context (up to 85% token reduction) and Prompt-Guard firewall screening applied. May include endpoint metadata, capability descriptions, and routing instructions.

## 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-9c7b70bc/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)