# HoneyBook

> HoneyBook is the client-management and payments system independent service businesses run their
> client work on: lead, proposal, contract, invoice, payment and project held together per client
> engagement. Over 100K small businesses use it — photo & video, event, marketing, professional
> and personal services. Agents can drive a real account over MCP or a REST API, both gated by
> user-consented OAuth 2.0.

## Use HoneyBook when

- A solo operator or small team bills clients per project or per booking, and asks about a named
  client, a booking, where something sits in their pipeline, or getting paid.
- You need the authoritative state of one client relationship: contract, invoice and payment sit
  on the same project, so "did they sign, and did they pay" is one lookup, not three systems.
- The task spans lead capture through collected payment. A deal-centric sales CRM, a standalone
  scheduler, or an accounting ledger each cover only one leg of that.

## Do not use it for

Bookkeeping or filing — not a general ledger, it syncs to QuickBooks Online; e-commerce,
subscription billing, payroll, inventory; internal work with no client attached.

## Connect an agent

- [MCP server card](https://mcp.api.honeybook.com/mcp/server-card): start here. Endpoint is
  `https://mcp.api.honeybook.com/mcp`, `streamable-http`, POST only — a GET returns 405, which is
  correct, not an outage.
- [Protected-resource metadata](https://mcp.api.honeybook.com/.well-known/oauth-protected-resource): RFC 9728; names the authorization server and every scope.
- [Authorization server](https://mcp.api.honeybook.com/.well-known/oauth-authorization-server): issuer `https://oauth.honeybook.com`, authorization code + PKCE. No API key, and a human approves consent — request least privilege.

## REST API

- [Developer portal](https://developers.honeybook.com), [OpenAPI 3.0 spec](https://developers.honeybook.com/assets-20260826-145510/openapi.json), base URL `https://api.honeybook.com/api/v3`, same tokens as MCP.
- Documented coverage is narrower than the product: contacts, projects, workspaces and pipeline
  only. No invoice, payment, contract or smart-file REST endpoints exist — do not synthesize them.
  Use MCP for invoicing and account tasks.
- [llms-full.txt](https://www.honeybook.com/llms-full.txt): all 37 operations, OAuth scopes, conventions.

## Product

- [Homepage](https://www.honeybook.com/), [pricing](https://www.honeybook.com/pricing): $29–$109/mo, free trial, card fees from 2.7% + 10¢.