A woman sitting cross-legged on a white sofa with a mug, smiling at her laptop against a volt wall.

Postkey Agentic

Ask your AI. You say yes.

Connect ChatGPT, Claude or your own agent to Postkey and ask in plain words: schedule posts, answer DMs, set up automations. It works as you, inside your plan, and anything that goes out waits for your OK.

Get started →What you can ask ↓

Works with

ChatGPT
Claude
Cursor
Hermes Agent
OpenClaw

Names and marks belong to their owners. No endorsement implied.

A woman in white linen at a café table on a sunny terrace, talking to her laptop against a cobalt wall.

Postkey Agentic

Ask your AI. You say yes.

Get started →What you can ask ↓

Works with

ChatGPT
Claude
Cursor
Hermes Agent
OpenClaw

Names and marks belong to their owners. No endorsement implied.

A woman laughing as she slices citrus at a white kitchen island, her laptop open beside her against a volt wall.

Postkey Agentic

Ask your AI. You say yes.

Get started →What you can ask ↓

Works with

ChatGPT
Claude
Cursor
Hermes Agent
OpenClaw

Names and marks belong to their owners. No endorsement implied.

Ask in plain wordsUp to 45 toolsAsks before it sendsActs as youInside your planSign in with PostkeyAgent keysOne MCP serverEnd it any timeAsk in plain wordsUp to 45 toolsAsks before it sendsActs as youInside your planSign in with PostkeyAgent keysOne MCP serverEnd it any timeAsk in plain wordsUp to 45 toolsAsks before it sendsActs as youInside your planSign in with PostkeyAgent keysOne MCP serverEnd it any timeAsk in plain wordsUp to 45 toolsAsks before it sendsActs as youInside your planSign in with PostkeyAgent keysOne MCP serverEnd it any time

Say it. Watch it work.

Ask in your own words. Your assistant uses Postkey’s tools (up to 45, depending on the access you give it) and hands you the result.

Your assistantPostkey · connected

Write a caption for Friday's drop, use the video from my library, and schedule it for 9am.

LooksYour plan, and that this connection asks firstpostkey_get_started
LooksFound the new drop videopostkey_list_library
ChangesDraft with the caption and the videopostkey_create_post
SendsFriday, 9:00 ampostkey_schedule_post

The draft is in Approvals for Friday at 9:00 am. Nothing goes out until you approve it.

@yourshop · Reel · Fri 9:00 amIt’s here. The new drop lands Friday at 9am. Tap the link in bio to shop it first ✦Waiting for your OKApprove

Make and change draft posts
Upload a video or picture from your computer to your Library
Attach files from your Library
Schedule a post, publish now, or add it to your queue
Take a post off the schedule, or delete a post that was never sent
Preview exactly what a post, an automation or a reply would do, before it does it

postkey_list_posts
postkey_get_post
postkey_create_post
postkey_update_post
postkey_attach_library_item
postkey_schedule_post
postkey_unschedule_post
postkey_delete_post
postkey_list_library
postkey_begin_upload
postkey_finish_upload
postkey_preview_action

postkey_schedule_post · postkey_publish_automation · postkey_send_reply reach real people, so they wait for your yes by default. See safety

Add it, sign in, choose what it may do

It takes about a minute. Tick the boxes on the last step and see how many tools that connection would get.

Your assistant · Add a connector

NamePostkeyServer addresshttps://your-postkey-address/mcpAdd

Postkey

Your assistant wants to use @yourshop

What it may doLook aroundRead onlySee your posts, library, automations, conversations, contacts and results. It cannot change anything.Posts and libraryCreate and change drafts and posts, attach library files, and schedule posts.DM automationsCreate and change DM automations, and turn them on or off.InboxRead conversations and reply to people, assign, label and add notes.ContactsFind contacts and add or remove their tags.X: ask Postkey before my agent repliesLets your agent ask Postkey before it replies or posts on X, tell Postkey what happened, and keep your STOP list and saved replies. These tools send nothing to X: your agent replies with your own X access. Postkey itself only publishes posts you schedule in Postkey.

Ask me in Postkey before anything is sent or published

35 of 45 tools · 12 can change things · 2 need your OK

CancelAllow

It asks before it sends.

By default, publishing a post, sending a DM reply and turning on an automation wait in Posts, Approvals. You check the words, pick the time and approve. Nothing reaches a real person before that.

The Approvals page in Postkey: a post submitted by Claude Code, ready for approval, with the time to post and an Approve button. — Real screen · Posts, Approvals

It acts as you, inside your plan
Every request runs as you, with your role, on the one account you picked. Your plan limits apply: on Free, the 5 posts a week count posts an assistant schedules too.
Limits on every connection
Up to 60 requests a minute and 200 changes a day by default. Looking around does not count toward the daily number.
Messages are not orders
Text from DMs and comments reaches your assistant marked as written by someone else, and it is told never to follow it.
Nothing hangs around
A reply or automation nobody answers lapses after 7 days. End a connection and its very next request is refused.

Stays with you · No assistant can do these, whatever access you give it

Your team and who has which role
Billing and your plan
Connecting or removing social accounts
Account settings
Deleting contacts
Bulk Inbox changes and Inbox settings

Works with the assistant you use

ChatGPT, Claude and any agent that can add an MCP server. Postkey shows the exact steps for each one when you connect.

ChatGPT
Add Postkey as a custom MCP server, then sign in.
Works today · Sign in with Postkey
Claude
Add Postkey as a custom connector, then sign in.
Works today · Sign in with Postkey
Cursor
Add Postkey to Cursor's MCP settings with an agent key.
Works today · With an agent key
Hermes Agent
One command where Hermes runs, then sign in.
Works today · Sign in or agent key
OpenClaw
Two commands where OpenClaw runs, or its Control UI.
Works today · Sign in with Postkey
Any other agent
Anything that can add an MCP server, or send a header.
Works today · Sign in or agent key
Coming soon
- Grok Bot
- Muse
- Instinct
They can’t add an outside tool yet. We will add them when we can.

Setup paths checked October 14, 2026. The names and marks shown here belong to their owners. Postkey is not affiliated with them, and showing one does not mean they endorse Postkey.

One MCP server. Sign in with Postkey.

MCP (Model Context Protocol) is the open standard assistants use to call outside tools. Postkey is one remote MCP server, so anything that speaks it can work in your account.

MCP server

One remote endpoint

Path: /mcp on your Postkey address
Transport: Streamable HTTP, stateless
Sign-in: OAuth 2.1 with PKCE, which the assistant finds on its own
Or: An agent key, sent as the Bearer token
Tools: Up to 45, by the access given, each marked read only or not

Skills

A guide your agent reads first

The rules for working in Postkey, as a skill file and as plain text for custom instructions.

/skills/postkey/SKILL.md
/skills/postkey/instructions.txt

Start with postkey_get_started. It learns your plan, what is left of it and what it may do before it plans anything.
Draft, preview, then ask. It shows you the post, reply or automation and waits for your yes.
Know what waiting for approval means. It tells you something is waiting in Approvals and never claims it was sent.

Agent keys

For agents that can’t open a sign-in page

Scripts, self-hosted agents and tools like Cursor send a key in a header instead. You make the key in Postkey, choose its access the same way, and can end it at any time. Up to 20 keys per person.

Keep a key out of chats, files and commits.

curl -s https://your-postkey-address/mcp \
  -H "Authorization: Bearer $POSTKEY_AGENT_KEY" \
  -H "Content-Type: application/json" \
  -H "Accept: application/json, text/event-stream" \
  -d '{"jsonrpc":"2.0","id":1,"method":"tools/call",
       "params":{"name":"postkey_get_started","arguments":{}}}'

Your AI and Postkey, answered

Yes. Sign in to Postkey and open Agent & API to connect an assistant or make an agent key.

No. You sign in on Postkey’s own page. The assistant gets access to one account, limited to what you ticked, and you can end it at any time.

Not by default. Publishing a post, sending a reply and turning on an automation wait in Posts, Approvals for your yes. An owner or admin can switch that off for one connection.

Yes. An assistant works inside the same plan and the same limits as you.

ChatGPT, Claude, Cursor, Hermes Agent, OpenClaw and Any other agent. Grok Bot, Muse and Instinct can’t add an outside tool yet. We will add them when we can.

It doesn’t. Text from DMs and comments comes back marked as written by someone else, and the rules your assistant reads say never to act on it. Anything it would send still waits for your yes.

There is no separate REST API. Everything goes through the one MCP server, which scripts can also call with an agent key.