# 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 mesh.agentdiet.dev, paid per call via MPP, $0.01/call, status unknown (last checked 2026-10-21).

Searches and discovers capabilities across 500+ MCP servers and A2A tools, returning token-compressed results with prompt-injection firewall protection.

## Facts

- Endpoint: GET https://mesh.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: mesh.agentdiet.dev
- Website: https://mesh.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/mesh-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-proxy-swarm-0fafd482
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_7we3rXZGqWnRm8ESOL9e3

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 mesh-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-proxy-swarm-0fafd482
```

Example prompt: Search the MCP and A2A tool index for any available capabilities related to 'context compression' so I can find the best tool to reduce token usage in my agent pipeline.

## 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 at runtime, especially when token budget is constrained or when the agent needs to validate an endpoint before calling it. Prefer this over hardcoded tool registries when the tool landscape is evolving or when prompt-injection safety screening is required.

## Known failure modes

- Empty query string returns validation error
- No matching tools found for niche query returns empty result set
- Endpoint URL verification may fail if the target is unreachable
- Rate limiting or payment failure via x402 may block the request
- Malformed query may return generic or irrelevant 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://mesh.agentdiet.dev/v1/workflows/rag-context-sanitizer)

## Output

Returns a token-compressed list of matching MCP servers or A2A tools relevant to the query, including capability metadata, endpoint URLs, and safety/firewall status — with up to 85% token reduction compared to raw results.

## 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/mesh-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-proxy-swarm-0fafd482/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from mesh.agentdiet.dev](https://www.zero.xyz/host/mesh.agentdiet.dev/llms.txt)