# 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 2026-10-23).

Searches and proxies across 500+ indexed MCP servers and A2A tools via a single meta-router endpoint with prompt injection firewall and token compression.

## Facts

- Endpoint: POST https://polymarket-odds.agentdiet.dev/v1/crypto-alpha-dag?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-23
- 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-d4df510a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_tZdPiqlpbfeUS7T-Vmh11

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-d4df510a -d '<json body>'
```

Example prompt: Search across all indexed MCP servers and A2A tools to find something that handles SEC filings or company enrichment — I want to see what's available before I wire it up.

## When to prefer this

Choose this endpoint when an AI agent needs to discover which MCP server or A2A tool to call for a given capability, rather than calling a known endpoint directly. Ideal for dynamic agent workflows that need to self-assemble tool chains from an indexed registry of 500+ servers. Prefer over direct integration when the target tool is unknown, or when you need safe proxying with prompt injection protection.

## Known failure modes

- Query too vague returns broad or irrelevant tool matches
- No matching MCP server found for niche capability query
- Prompt-Guard firewall blocks adversarially crafted queries
- Payment failure via x402 returns 402 status with payment instructions
- Malformed query (empty string) rejected by schema validation
- Downstream MCP server unreachable causes proxy timeout

## 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/crypto-alpha-dag)

## Output

Returns a list of matching MCP servers or A2A tools relevant to the query, including endpoint details, capability descriptions, and compressed metadata — routed through a Prompt-Guard firewall to prevent injection attacks.

## 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-d4df510a/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)