# 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 2026-10-22).

Searches an index of 500+ MCP servers and A2A tools by capability query, returning compressed, firewall-screened tool references via a single connection.

## Facts

- Endpoint: GET https://json-repair.agentdiet.dev/v1/workflows?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-22
- 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-870ea088
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_OFnHEBpOLoAHLM1REcMzs

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-870ea088
```

Example prompt: Search the MCP tool index for agents that handle 'SEC filings' — I want to find available tools I can route to for that capability.

## When to prefer this

Choose this endpoint when an AI agent needs to dynamically discover which MCP servers or A2A tools support a given capability at runtime, rather than hardcoding tool references. It is especially useful for swarm orchestrators that need to route tasks to the best available agent, or when building meta-agents that must adapt their toolset based on the query at hand. Prefer this over manual tool registries when you need 500+ tools searchable via a single connection with token compression.

## Known failure modes

- Missing or empty 'query' parameter returns a 400 validation error
- No matching tools found returns an empty result set
- Endpoint URL provided for verification may not be indexed, returning no match
- Service may return stale index data if upstream MCP servers are not recently crawled
- Payment required (HTTP 402) if x402 credit is not provided

## 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/workflows)

## Output

Returns a compressed list of matching MCP servers or A2A tools relevant to the capability query, including tool names, descriptions, and routing references, filtered through a Prompt-Guard firewall to remove malicious or non-compliant entries.

## 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-870ea088/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)