Direct messages API

Direct messages from every network in a single API

Set it up in 5 minutes and publish today on every network from a single API.

Read and send Instagram, Messenger, WhatsApp, Telegram and X DMs in a single format, with attachments, reactions and read receipts.

POST /v1/inbox/conversations/cnv_…/messages
{
  "accountId": "acc_instagram",
  "text": "Your order ships today 📦",
  "attachmentUrl": "https://cdn.acme.com/tracking.pdf",
  "attachmentType": "file"
}
How it works

Up and running in three steps

  1. 1

    Connect the channels

    Each messaging network connects in one click.

  2. 2

    Receive messages

    message.received arrives at your webhook in the same format for all of them.

  3. 3

    Reply

    One request to answer, whatever the channel.

For agents

Ask your agent

Everything the API does is available on our MCP server. Your agent prepares it, you approve it and we run it.

FAQ

Frequently asked questions

Can I message a user first?

It depends on each network. On WhatsApp you use templates; on Instagram you can only reply.

Does it work with AI agents?

Yes, through webhooks or MCP, with hand-off to a person whenever you want.

Start today with a single integration

Create your account in a minute, no card needed. Try it free for 7 days from your first post.

🚧 Not ready yet

We're finishing building it

Marsial is in early access. Leave your email and you'll be among the first in, with launch terms.

or with your email

No spam. We'll only write to give you access.

You're on the list!

We'll write to you as soon as your access is ready.