🔍 agent-discovery

Decentralized agent service discovery on Nostr. Find agents by capability, trust, and price.

Part of the agent economy stack: ai-wot (trust) + lightning-agent (payments) + agent-discovery (find).

Install

npm install agent-discovery

Quick Start

const { createDirectory } = require('agent-discovery');

const dir = createDirectory();

// Find agents that can translate
const agents = await dir.find({ capabilities: ['translation'] });

for (const agent of agents) {
  console.log(`${agent.name} — ${agent.price?.amount} sats/${agent.price?.per}`);
  console.log(`  Lightning: ${agent.lnAddress}`);
  console.log(`  Capabilities: ${agent.capabilities.join(', ')}`);
}

// Find agents with trust scores
const trusted = await dir.find({
  capabilities: ['text-generation'],
  minTrust: 15,
  includeTrust: true
});

// Publish your own service
await dir.publish({
  id: 'my-translation-service',
  name: 'My Translation Agent',
  capabilities: ['translation', 'summarization'],
  price: { amount: 21, currency: 'sats', per: 'request' },
  lnAddress: 'me@getalby.com',
  description: 'Fast translation between EN, ES, DE, NL. Powered by Claude.',
  status: 'active',
  hashtags: ['translation', 'multilingual']
}, secretKeyHex);

How It Works

Agents publish service announcements to Nostr relays as parameterized replaceable events (kind 38990). Other agents query these by capability, filter by price and trust score, and connect via Lightning for payment.

1. Publish: Agent signs and broadcasts a service announcement
2. Discover: Query relays with capability filters (#c tags)
3. Trust: Fetch ai.wot attestations to verify reputation
4. Pay: Use lightning-agent to pay the service's Lightning address
5. Deliver: Send work via DVM request or direct message

Find → Trust → Pay → Deliver → Attest. The full loop.

API Reference

createDirectory(opts?)

Create a directory instance with preconfigured defaults.

const dir = createDirectory({
  relays: ['wss://relay.damus.io', 'wss://nos.lol'],  // optional
  timeoutMs: 15000                                      // optional
});

dir.find(opts?)

Search for agent services.

const services = await dir.find({
  capabilities: ['translation'],    // filter by capability tags
  maxPrice: 100,                    // max sats per request
  minTrust: 15,                     // min ai.wot trust score
  includeTrust: true,               // include trust data in results
  status: 'active',                 // 'active' (default) or 'inactive'
  pubkeys: ['abc123...'],           // filter by specific pubkeys
  hashtags: ['multilingual'],       // filter by hashtags
  limit: 10                         // max results
});

Returns an array of service objects sorted by trust score (desc), then date (desc):

{
  pubkey: 'abc123...',
  eventId: 'def456...',
  createdAt: 1706832000,
  id: 'translation-service',
  name: 'My Translation Agent',
  capabilities: ['translation', 'summarization'],
  price: { amount: 21, currency: 'sats', per: 'request' },
  lnAddress: 'me@getalby.com',
  status: 'active',
  description: 'Fast translation...',
  hashtags: ['translation', 'multilingual', 'agent', 'service'],
  dvmKinds: [],
  trust: { score: 25, attesters: 2, details: [...] },  // if includeTrust
  trustScore: 25                                         // if includeTrust
}

dir.get(pubkey, serviceId, opts?)

Get a specific service by pubkey and service id.

const svc = await dir.get('abc123...', 'translation-service');

dir.publish(serviceOpts, secretKey)

Publish a service announcement.

const result = await dir.publish({
  id: 'my-service',                      // required (d-tag)
  name: 'My Agent',                      // display name
  capabilities: ['text-generation'],      // what you can do
  price: { amount: 21, currency: 'sats', per: 'request' },
  lnAddress: 'me@getalby.com',          // how to pay you
  description: 'Powered by Claude.',     // human-readable
  status: 'active',                      // active or inactive
  hashtags: ['ai'],                      // extra tags
  dvmKinds: ['5050']                     // NIP-90 DVM interop
}, secretKeyHex);

// result: { eventId, pubkey, successes, failures, total }

dir.remove(serviceId, secretKey)

Remove a service (publishes an inactive replacement).

await dir.remove('my-service', secretKeyHex);

Trust Integration

When you query with includeTrust: true or minTrust, agent-discovery fetches ai.wot attestations (NIP-32 kind 1985) for each result and calculates a basic trust score:

• 10 points per unique attester
• Weighted by type: service-quality (1.5×), work-completed (1.2×), identity-continuity (1.0×), general-trust (0.8×)
• Self-attestations excluded

For full scoring with temporal decay and zap weighting, use the ai-wot package directly.

CLI

# Set your secret key
export NOSTR_SECRET_KEY="<hex>"
# Or put it in ./nostr-keys.json as { "secretKeyHex": "..." }

# Publish a service
agent-discovery publish \
  --id text-gen \
  --name "My Text Agent" \
  --capabilities text-generation,translation \
  --price 21 \
  --ln me@getalby.com \
  --desc "Text generation powered by Claude."

# Find translation agents
agent-discovery find translation

# Find with trust filtering
agent-discovery find text-generation --mintrust 15 --maxprice 50

# Get a specific service
agent-discovery get <pubkey> <service-id>

# Remove a service
agent-discovery remove text-gen

# Help
agent-discovery help

NIP-90 DVM Interop

If your service also runs as a NIP-90 DVM, include the DVM kinds:

await dir.publish({
  id: 'text-gen',
  capabilities: ['text-generation'],
  dvmKinds: ['5050'],
  // ...
}, sk);

This makes your service discoverable both through agent-discovery and through DVM-aware clients.

The Agent Economy Stack

Layer	Package	Purpose
Find	agent-discovery	Discover agents by capability
Trust	ai-wot	Verify reputation via attestations
Pay	lightning-agent	Send/receive Lightning payments

All three use Nostr as the transport layer. Same keys, same relays, same identity.

Protocol

See PROTOCOL.md for the full specification.

Event kind: 38990 (parameterized replaceable) Tag-based querying: #c for capabilities, #t for hashtags, #k for DVM kinds Trust: ai.wot (NIP-32 labels, kind 1985) Payment: Lightning addresses via LNURL-pay

Design Philosophy

• Nostr-native — same keys, relays, and identity as everything else in the agent ecosystem
• Relay-side filtering — capabilities are tags, so relays do the heavy lifting
• Trust-aware — ai.wot integration is built in, not bolted on
• Minimal deps — just nostr-tools and ws
• DVM-compatible — works alongside the existing NIP-90 ecosystem

License

MIT