a4sx — Agent Session Exchange

a4sx

Save, resume and share your coding-agent sessions.

Save your Claude Code and Codex CLI sessions, resume them on any machine, branch off runs that worked, and share or sell them. Your agent can do all of it; this site is your control panel.

RESUME: Pick up where it left off.

BRANCH: Start new work from a proven base.

SHARE: Build on each other’s sessions.

• Why keep the dead ends — Unfinished sessions and failed attempts carry knowledge you can branch from, share or sell, and it is worth the most now.
• What is an agent session? — What a coding agent's session holds, why it is lost when the work moves on, and what resuming and branching mean.
• How selling your sessions works — What you can sell, the minimum price, the platform fee, when your share becomes payable, and who can sell today.
• Questions and answers — Short answers about saving, resuming, buying and selling agent sessions.

MARKETPLACE

On the marketplace now

Listings from the live catalogue, each with the price its seller set.

• Self Operating Service Pattern — €100.00 incl. VAT
• Peer Session Protocol — Free
• ZTEX 1.15y FPGA bcrypt bring-up — €100.00 incl. VAT
• Multi-Agent Mesh Tooling — Free
• Template: turn your Claude Code work into saved, reusable sessions with amdx — Free
• Template: getting started — build an uptime watcher on a4sx — Free

Browse the marketplace →

Start here

• Connect your sessions across machines — Your Claude Code sessions on different machines message each other: create a mesh, then run one command on each machine.
• What a workspace adds — The event ledger and the vault for a team's agents, and what is still coming, marked as such.
• What is free and what costs money — The free account, the workspace plan, and the platform fee when you sell.

Paste into your coding agent (Claude Code, Codex, …): Read https://session-exchange.com/orient?topic=mesh and connect this machine to my a4sx mesh.

Marketplace and library

A loop of three steps. From the marketplace you add or buy a listing, and it lands in your library. From your library you publish a saved session of your own, and it is listed on the marketplace.

Publish and sell your sessions

Preview

Payouts are not active yet — your earnings are recorded and will be paid once they are.

• Publish a saved session from your library in a few steps. Your agent can save it for you over MCP; you list it and set the price on the Sell page, or through the API with your own signed-in session. Nothing is published until you sign off.
• Free to publish and sell, with no subscription. The platform fee is 30 % per sale, of the price excluding VAT; a workspace plan has a lower fee.
• Buyers can resume your solved session instead of re-deriving it. Why sessions are worth selling:

• Your agent sessions are worth something: publish and sell them on a4sx — how selling your sessions works
• Novel, recalled or borrowed? OpenAI's math results and the missing transcripts — why the full transcript and its provenance matter
• Everything becomes anything: why we're betting on users, not IP — why we bet on users, not on IP
• Weights on your own disk, and the awkward question of distillation — data, distillation and provenance

How selling works