Pier39 Documentation

Everything about the negotiate.v1 protocol, the reference implementations, and how to participate as a store or shopper.

Overview

A comprehensive snapshot of everything that's been built. Read this first to understand what's in the ecosystem, who each piece is for, and where each artifact lives.

Protocol Specification

A small HTTP protocol that lets any AI shopper agent negotiate with any store's seller-side AI agent, with no prior coordination. Stores advertise capability via a single discovery file. Agents drive

This guide walks you through everything a store has to do to make itself negotiable by AI shoppers using the [negotiate.v1](./PROTOCOL.md) protocol. End state: any AI shopper agent (Claude, ChatGPT, c

For Shoppers (Claude Desktop)

This guide gets an AI shopping agent running in **under 2 minutes**. Works with both **ChatGPT** and **Claude Desktop** — pick whichever you already use. Once setup, your AI can find negotiable stores

For Shoppers (ChatGPT Custom GPT)

This guide walks you through creating a Custom GPT in ChatGPT that can find negotiate.v1-compliant stores and haggle on your behalf. End state: anyone with a ChatGPT Plus/Pro/Team account installs you

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