# 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 json-repair.agentdiet.dev, paid per call via MPP, $0.01/call, status unknown (last checked 2026-10-28).

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

## Facts

- Endpoint: POST https://json-repair.agentdiet.dev/v1/a2a-router?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-28
- Activations on Zero: 0
- Provider: json-repair.agentdiet.dev
- Website: https://json-repair.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/json-repair-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-proxy-185ebbd0
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_DDgYAaCxN1RhPBXcPytX7

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 json-repair-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-proxy-185ebbd0 -d '<json body>'
```

Example prompt: Search the A2A and MCP tool index for any servers that can handle SEC filings or financial intelligence — I want to find and route to the right tool without connecting to each one separately.

## When to prefer this

Choose this endpoint when you need to discover, search, or route across a broad ecosystem of MCP servers and A2A tools without maintaining individual connections to each. Ideal for agents that need to find the right tool dynamically, want 85% token compression on aggregated results, or require a prompt-injection firewall before passing queries to third-party tools.

## Known failure modes

- Empty or vague query returns no matches or low-confidence results
- Queried endpoint URL is unreachable or non-compliant, returning a validation error
- Token limit or compression failure if upstream tool response is malformed
- Payment required (HTTP 402) if x402 micropayment is not provided or fails
- No matching tools found for niche or unsupported capability queries

## 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://json-repair.agentdiet.dev/v1/a2a-router)

## Output

Returns matched tool listings, capability metadata, and routed responses from indexed MCP servers and A2A agents, with up to 85% token compression applied and prompt-injection threats filtered by the Prompt-Guard firewall.

## 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/json-repair-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-proxy-185ebbd0/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from json-repair.agentdiet.dev](https://www.zero.xyz/host/json-repair.agentdiet.dev/llms.txt)