Agent Discovery Index

What We Index

The crawler probes thousands of domains across four discovery protocols.

How Services Are Accessed

The index probes every alive service to classify its access requirements.

How It Works

Three steps from publication to execution.

For Service Providers

Make your service discoverable. No registration, no accounts, no approval process.

// Serve at /.well-known/agent-card.json
{
  "name": "Translation Agent",
  "description": "Translates text between 50+ languages",
  "url": "https://api.example.com",
  "skills": [
    {
      "id": "translate",
      "name": "Translate Text",
      "inputModes": ["text/plain"],
      "outputModes": ["text/plain"]
    }
  ]
}

// Serve at /.well-known/agent.json
{
  "services": [
    {
      "endpoint": "/translate",
      "capabilities": ["translation"],
      "payment_hints": ["free"]
    }
  ]
}

// If your API already serves an OpenAPI spec at
// /openapi.json or /swagger.json, we'll find you
// automatically. No additional configuration needed.

// The crawler checks these paths on every domain:
//   /openapi.json
//   /openapi.yaml
//   /swagger.json
//   /api/openapi.json

For Agent Developers

Install the SDK and start discovering services in five lines.

npm install agent-discovery-sdk

import { AgentDiscovery } from 'agent-discovery-sdk'

const discovery = new AgentDiscovery()

// Find translation services
const results = await discovery.search('translation')

for (const service of results.results) {
  console.log(service.endpoint, service.capabilities)
  // → https://api.example.com/translate ["translation"]
}

// Find only MCP servers
const mcp = await discovery.search('*', { sourceType: 'mcp-server-card' })

// Find payment-gated services
const paid = await discovery.search('*', { hasPayment: true })

// Submit your own service
await discovery.submit('https://api.myservice.com')

// Async iteration over results
for await (const service of discovery.discover('search')) {
  console.log(service.endpoint)
}

See the SDK README for full API documentation.

Live Index Explorer

Search the index right here. Try "search", "translation", or "geocoding".

Principles

Security & Trust

Discovery is not endorsement. The index tells you what exists — your agent decides whether to trust it.

const risk = await discovery.verify('https://api.example.com')
// { riskLevel: "low", hasValidTLS: true, injectionDetected: false }

const safe = sanitizeResponse(rawBody)
// Strips HTML, scripts, and prompt injection patterns