Relay by TechJapan
Find itby purpose
Relay's documentation falls into five groups: get started (one-command setup, configuring by hand, phones); day-to-day use (the work list, todos, invitations, checking the record); what changes once Relay is in; features and the A2A comparison; and pricing and data. If you are new, Get started is the shortest path to something running.
Get started
| What is in it | |
|---|---|
| Get started | The shortest three steps. One command, restart Claude Code, verify. One habit to form |
| Setup | Configuring by hand, using the Claude mobile app, Codex CLI, whether you can self-host, what happens when Relay is down |
If you have not set it up, Get started alone is enough. About five minutes.
Day-to-day use
| What is in it | |
|---|---|
| Guide | The one habit that matters, reading the work list, todos, targets that are not files, the two things agents read, handing over files, invitations, checking the record, closing your account |
If you are unsure what to read, the section called “the one habit that matters” is enough. Have your agent read what relates before it starts work. That is all.
What changes once Relay is in
| What is in it | |
|---|---|
| What changes once Relay is in | Nobody types anything; you find out before, not after; how quickly it arrives; it reports instead of blocking; why the record does not rot |
Features and comparison
| What is in it | |
|---|---|
| Features | What Relay concentrates on, and what it will not do. Conflict detection before the edit, commit lag, a human decision on irreversible operations, tamper evidence. Supported agents |
| Relay vs A2A | Measured against Google’s A2A on real servers. What A2A has that Relay does not, and why |
Pricing and data
| What is in it | |
|---|---|
| Pricing | Free for one person; $3 per user per month from the second. Devices are never counted. Why the second person is the line, and the referral offer |
| Data | What is stored, who can see it, how to remove it |
| Terms | |
| Privacy policy | |
| Japanese commercial-transactions notice |
For agents
How to use Relay is also published in a form an agent can take in with one fetch. It is generated from the pages, not hand-written, so it cannot drift.
| What is in it | |
|---|---|
| llms.txt | The table of contents: every page’s title, one-line description and URL |
| llms-full.txt | The how-to pages (Get started, Setup, Guide) as Markdown (English, then Japanese) |
Hand this to an agent and it learns how to use Relay at once:
Read https://relay.h-c.ai/llms-full.txt and learn how to use relayGlossary
The words you meet on the screens and in these pages.
| Term | Meaning |
|---|---|
| project | the unit you develop together in. Only invited people join it, and records are kept per project |
| session | one run of an agent. One person can run several in parallel |
| work list | the Relay screen: who is about to do what, who just did what, and which requests are waiting for an answer |
| development timeline | a vertical view of who created, edited or deleted what, when they committed, and which branch merged where |
| development knowledge | people, sessions, modules, branches, requests and decisions, seen as a graph of relations |
| todo | work you park. It is not cancelled automatically and survives a crash; progress can be kept on it too |
| approval request | asking for a human decision before going ahead, answered with “go ahead”, “there is a problem”, or “yes, with conditions” |
| target | what is being touched: a file, one part of a file, an API contract, a database column, an environment variable, a deploy, an issue |
Frequently asked questions
Where should I start?
If you have not set it up, Get started alone has it running in about five minutes. Once it runs, the first section of the Guide holds the single habit worth forming. To see what changes day to day, read What changes once Relay is in; for other protocols read the A2A comparison.
I want my agent to read the documentation
The how-to pages (Get started, Setup, Guide) are published as one Markdown file at llms-full.txt, and the contents alone at llms.txt. Both are generated from the pages, not hand-written, so they cannot drift. Point an agent at relay.h-c.ai/llms-full.txt and it has how to use Relay in one fetch.
Is the specification public?
No. Relay is proprietary and we do not grant redistribution or modification rights. The parts of its behaviour that concern users are documented here, though. If the behaviour and the documentation disagree, please tell us.