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

Searches an index of 500+ MCP servers and A2A tools by capability query, returning compressed, prompt-injection-safe tool descriptions to help agents discover and route to the right external tool or endpoint.

## Facts

- Endpoint: GET https://llms-generator.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: llms-generator.agentdiet.dev
- Website: https://llms-generator.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/llms-generator-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-e5f19512
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_fzGM_w_5CxHshjUAeJkKs

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 llms-generator-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-e5f19512
```

Example prompt: Search the MCP and A2A tool index for anything that can do 'SEC filings' lookups and show me the top matches with compressed descriptions.

## When to prefer this

Choose this endpoint when an agent needs to dynamically discover which MCP server or A2A tool supports a given capability at runtime, rather than hardcoding tool references. It is especially useful in multi-agent swarms where tool routing must be resolved dynamically, or when you want to verify whether a known endpoint URL is indexed and compliant. Prefer it over manually browsing MCP registries when you need compressed, safe-to-consume tool metadata for downstream LLM consumption.

## Known failure modes

- Empty or vague query returns no matches or irrelevant results
- Endpoint URL submitted for verification may not be in the index, returning a not-found result
- Service may return HTTP 402 requiring x402 micropayment before responding
- Malformed query (below minLength:1) rejected with validation error
- Index may not reflect newly added or recently updated MCP servers in real time

## 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://llms-generator.agentdiet.dev/v1/workflows/rag-context-sanitizer)

## Output

Returns a structured object containing matched tool or server metadata from the 500+ MCP/A2A index, with descriptions compressed by up to 85% using token-efficient encoding and filtered through a Prompt-Guard firewall to remove injection risks. May also return endpoint verification status if a URL is submitted as the query.

## 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/llms-generator-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-e5f19512/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from llms-generator.agentdiet.dev](https://www.zero.xyz/host/llms-generator.agentdiet.dev/llms.txt)