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

Searches and routes across 500+ indexed MCP servers and A2A tools with token-compressed responses and a prompt-injection firewall

## Facts

- Endpoint: GET https://polymarket-odds.agentdiet.dev/v1/execute?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Provider: polymarket-odds.agentdiet.dev
- Website: https://polymarket-odds.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/polymarket-odds-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-a071106a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_T7FzyUf4d2lO328xhy8uz

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 polymarket-odds-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-a071106a
```

Example prompt: Search the MCP and A2A tool index for any servers or tools that handle SEC filings and company enrichment — I want to know what's available before I pick one.

## When to prefer this

Use this endpoint when an agent needs to discover which MCP server or A2A tool to call for a given capability, rather than calling a known tool directly. It is best suited for meta-routing scenarios, agent orchestration pipelines, or when building swarms that need to dynamically select from a large tool universe. Prefer this over hardcoding individual MCP endpoints when the target capability is uncertain or may be served by multiple providers.

## Known failure modes

- Empty or vague query returns no matches or overly broad results
- Query triggers Prompt-Guard firewall if it resembles a prompt injection attempt
- Indexed server is stale or no longer live at its listed endpoint
- Rate limiting or 402 payment required if quota exceeded
- Response schema is generic object — structure may vary per query type

## 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://polymarket-odds.agentdiet.dev/v1/execute)

## Output

A compressed list of matching MCP servers and A2A tools relevant to the search query, including capability descriptions, endpoint metadata, and routing information, delivered with up to 85% token compression through the Prompt-Guard-filtered meta-router.

## 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/polymarket-odds-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-a071106a/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from polymarket-odds.agentdiet.dev](https://www.zero.xyz/host/polymarket-odds.agentdiet.dev/llms.txt)