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rtsubber

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I Built the LinkedIn for AI Agents — Here's Why

#ai #api #agents #webdev

I Built the LinkedIn for AI Agents — Here's Why

LinkedIn is where you find human talent. AgentSeek is where you find AI talent.

There are thousands of AI agents out there. But they can't find each other. If your agent needs to verify a business, process a payment, or look up a location — you have to hardcode that connection. There's no directory. No search. No way to discover agents by capability.

AgentSeek fixes that. It's a registry where AI agents register with A2A-compliant manifests and discover each other through semantic search.

Even academic researchers agree this needs to exist — a May 2025 paper from China Telecom Research Institute proposed "AgentDNS" for the same problem. We built the live version.

How It Works

1. Register Your Agent

One POST request and your agent is live in the directory:

curl -X POST https://agentseek.co/v1/register \
  -H "X-API-Key: ar_your_key_here" \
  -H "Content-Type: application/json" \
  -d '{
    "name": "My Business Verifier",
    "description": "Verifies businesses via web scraping and phone calls",
    "capabilities": ["business_verification", "phone_verification", "hours_confirmation"],
    "endpoint_url": "https://api.example.com/v1",
    "owner_email": "you@example.com",
    "category": "verification",
    "pricing": {"per_call": 0.015}
  }'
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You get back:

  • A permanent agt_ agent ID
  • An A2A-compliant manifest endpoint
  • A free API key if you don't have one

2. Discover Agents by Capability

Natural language search. "Verify business hours" finds agents that can do that — even if they call it hours_confirmation:

curl "https://agentseek.co/v1/discover?q=verify+business+hours" \
  -H "X-API-Key: ar_your_key_here"
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Returns:

{
  "results": [{
    "agent_id": "agt_localeye_001",
    "name": "Local-Eye Business Verifier",
    "match_score": 85,
    "match_type": "semantic",
    "why": "Capability match: business_verification",
    "trust_score": 94,
    "verified": true
  }],
  "total": 1
}
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Two search modes work together:

  • Semantic search — Ollama embeddings (nomic-embed-text) match meaning, not just keywords
  • Keyword fallback — stem matching catches what embeddings miss

3. Connect and Use

Grab the agent's manifest for everything you need:

curl https://agentseek.co/v1/agents/agt_localeye_001/manifest
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{
  "schema_version": "1.0",
  "name": "Local-Eye Business Verifier",
  "capabilities": ["business_verification", "phone_verification", "hours_confirmation"],
  "endpoint": "https://api.localeye.co/v1",
  "auth": "api_key",
  "pricing": {"per_call": 0.015},
  "trust": {
    "score": 94,
    "verified": true,
    "total_calls": 24
  }
}
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What Makes This Different

A2A-Compliant Manifests

Every registered agent gets an Agent-to-Agent protocol manifest. This isn't just a directory listing — it's machine-readable metadata that other agents can parse and act on immediately. No custom integration per agent.

Trust Scores, Not Just Listings

Agents earn trust through:

  • Verification — paid tiers get verified badges (human-tested, working agents)
  • Reviews — rate agents 1-5 after using them
  • Usage data — total calls and success rates are public
  • Semantic matching — better matches rise to the top

Built for the Agent Economy

The API is designed for agents calling agents, not just humans browsing:

  • Email verification on key creation — no fake signups
  • Tier limits — free keys get 100 discoveries/month, verified gets 1,000
  • Stripe integration — checkout sessions for instant tier upgrades
  • Rate limiting — 30/hr unauthenticated, 100/month free tier
  • Admin endpoints — revoke keys, purge agents, reset counters

The Tech Stack

  • FastAPI — async Python backend with automatic OpenAPI docs
  • SQLite (WAL mode) — zero-ops database, single-file, easy backups
  • Ollama — local embeddings with nomic-embed-text for semantic search
  • Stripe — payment processing with webhook verification
  • Tailscale Funnel — secure public exposure, automatic HTTPS
  • Vercel — landing page + API proxy with CDN

All secrets come from environment variables. No hardcoded defaults.

Open Source

The entire backend is open source: github.com/rtsubber/AgentSeek

Self-host it, extend it, or just learn from it. The schema, API design, and security patterns are all there.

The Agent Business Suite

AgentSeek is part of a three-piece infrastructure stack for the agent economy:

  1. AgentSeek — Discover agents ($0-299/mo)
  2. Local-Eye — Verify businesses ($0-29/mo)
  3. Agent Monitor — Track uptime ($0-29/mo)

Bundle all three for $79/mo with a single API key.

What's Next

  • Embedding upgrades — swap sha256 hashes for real vector similarity (pgvector or Qdrant)
  • Health checking — periodic pings to verify registered endpoints are still alive
  • Agent-to-agent calling — POST /v1/agents/call/{id} with request routing
  • Webhook notifications — get notified when new agents register in your categories

Try It Now

  1. Get a free API key: agentseek.co
  2. Register your agent: POST /v1/register
  3. Discover agents: GET /v1/discover?q=what+you+need

Free tier includes 100 discoveries/month. No credit card required.

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