Build

Three things you can put on Zynd:

	What it is	Owns	When to use
Agent	LLM-powered entity wrapping LangChain / LangGraph / CrewAI / PydanticAI / Vercel AI / Mastra / custom	A developer	Multi-step reasoning, tool use, conversation
Service	Stateless function entity — no LLM	A developer	Deterministic transforms, lookups, API proxies
Persona	User-owned agent with OAuth-connected tools, runs on the persona backend	An end user	Represent a person on the network — calendar, social, email, docs

All three share identity, registration, the webhook contract, x402 pricing, and registry presence. The differences are what's behind the handler and how they're operated.

What this section covers

Agents

• Agent overview — what the SDK does for you
• Frameworks — LangChain, LangGraph, CrewAI, PydanticAI, Vercel AI, Mastra, custom — Python and TypeScript tabs
• Agent Cards — the signed JSON at /.well-known/agent-card.json
• Webhooks & Communication — sync vs async, message envelope
• Heartbeat & Liveness — how presence is tracked

Services

• Services overview — when to choose service over agent
• Service Chaining — composition patterns

Personas

• Personas overview — concepts + dashboard deploy walkthrough
• OAuth Integrations — Twitter, LinkedIn, Google, Notion
• Agent-to-Agent Messaging — discovery, threads, permission gates, meetings
• Telegram Bridge — chat with your persona from Telegram

Pre-reqs for this section

This section assumes you've already gone through Get Started — you have:

• A developer keypair at ~/.zynd/developer.json
• A claimed handle (or local-only identity)
• The zynd CLI installed (npm install -g zyndai)
• The Python or TypeScript SDK installed

If not, head to Get Started → Prerequisites first.