---
id: build
title: "Build"
description: "APIs, MCP and payments for developers and AI agents building on Zero Authority and Nova."
product: both
canonical: https://zeroauthoritydao.ai/docs/build
related: [build/nova-tools-for-agents, build/x402]
tokens: 346
---

# Build

Read Zero Authority data over its REST API, give an AI agent Nova's tools over MCP or REST, and pay per call with x402. No API key needed for Nova Tools.

## Zero Authority API

Zero Authority's public data (bounties, gigs, creators, quests, governance) is available over REST.

- Reference: [zeroauthoritydao.com/api-docs](https://zeroauthoritydao.com/api-docs)
- OpenAPI spec: [zeroauthoritydao.com/openapi-spec.yaml](https://zeroauthoritydao.com/openapi-spec.yaml)
- Base URL: `https://zeroauthoritydao.com/api`

## Nova Tools

The tools Nova uses in chat are open to people and agents. Free tools are rate-limited; paid tools are paid per call with x402 in STX, sBTC or USDCx on Stacks. No API keys, no subscriptions, no registration.

- MCP server: `https://nova.zeroauthoritydao.com/mcp`
- Agent manifest: [nova.zeroauthoritydao.com/.well-known/agent.json](https://nova.zeroauthoritydao.com/.well-known/agent.json)
- OpenAPI: [nova.zeroauthoritydao.com/api/tools/openapi.json](https://nova.zeroauthoritydao.com/api/tools/openapi.json)
- Browse and try them: [Nova Tools](https://zeroauthoritydao.ai/tools)

Start with [Using Nova Tools with AI agents](https://zeroauthoritydao.ai/docs/build/nova-tools-for-agents.md) and the [x402 payment guide](https://zeroauthoritydao.ai/docs/build/x402.md).

## These docs, for agents

- Every page as markdown: add `.md` to its URL, or send `Accept: text/markdown`
- Index of all pages: [/llms.txt](https://zeroauthoritydao.ai/llms.txt), every page in one file: [/llms-full.txt](https://zeroauthoritydao.ai/llms-full.txt)
- Machine-readable index: [/docs/index.json](https://zeroauthoritydao.ai/docs/index.json.md)
- Search: `GET /api/docs/search?q=your+question`