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How-to guide

How to send a webhook when a post publishes

In Settings open Webhooks, add your endpoint address, and choose the events and networks it should cover. Send a test message, then check the signature on each real one against your secret so you know it came from 1Post. Failures show in the developer log with the payload and response.

Also:How-to guidesWebhookAPI key

Updated 2026-10-23

Steps

  1. 01

    Add the endpoint

    In Settings, Webhooks, enter the address that will receive the messages.

  2. 02

    Choose events and networks

    Pick which events fire it, and limit it to chosen networks if you want.

  3. 03

    Send a test

    Use the test button and confirm your system receives it.

  4. 04

    Verify the signature

    Check each message's signature against your secret before you trust it.

  5. 05

    Watch the log

    The developer log shows each delivery with its payload and response.

Good to know

  • The number of endpoints depends on your plan.
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Count characters the way each network does, split threads and preview posts. No account needed.

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For builders

API and MCP

Post to every network from your own code or assistant with one key, signed webhooks and idempotent requests.

See the API

Questions

Are webhooks signed?

Yes, every message carries a signature.

Can I send a post to my own URL?

Yes. A webhook can also be a destination, which sends the post as signed JSON.

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