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Tested on Oct 31, 2026

How to connect WhatsApp and Telegram to OpenBot with MCP

Let your OpenBot agent read and reply on WhatsApp and Telegram, and find the tools on the first try.

Before you ask your agent (paste this in the agent's instructions or skill)

The tools are felku_*. In OpenBot they show up under the name you gave the server: if you call the server Felku, they are tools.Felku.felku_*. To read messages, call felku_read_new_messages. The agent only gets chats from the contact list; an empty list means only your own number on WhatsApp and nothing on Telegram. Groups don't arrive in felku_read_new_messages; a group the owner enabled is read with felku_read_group_messages. Send the previous next_cursor as after, or you'll get the same messages again.

In our test, without that paragraph, the agent took about 15 tries to find out how to call the tools.

Step by step

  1. Connect WhatsApp or Telegram in the Felku dashboard and add the people the agent may talk to to your

contact list. Messages from anyone else are dropped on arrival.

  1. Connect OpenBot to Felku, in one of the two ways below. The name you give the server in OpenBot becomes the

prefix of the tools.

With a key

  • Create a key under Agents and keys. For an agent that only reads and summarizes, keep only the reading

boxes checked (the default): Read messages and See status and limits on, Send and act off. It can read and can't send. The key starts with fkc_ and is shown once.

  • In OpenBot, add a remote MCP server with the URL https://mcp.felku.com.br/mcp and the header

Authorization: Bearer <your key>.

Then

  1. Paste the paragraph above into the agent's instructions or skill.

  2. Ask the agent: "show my Felku connection status". It should call felku_get_connection_status.

What the agent can and can't do

  • It only reads and replies to contacts on your list, in one-to-one chats.

  • With a read-only key, it can't send at all. We tested reading from OpenBot; sending from OpenBot hasn't been

tested yet.

  • Every send has limits on the server, the same on every plan: a few messages an hour on a newly connected number,

at most 3 first messages a day (fewer if you choose), and a pause if the connection starts failing.

  • The WhatsApp connection is unofficial (a linked device, like WhatsApp Web). WhatsApp can restrict a number at any

time; the limits lower that risk, they don't remove it. Use a spare number.

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