Unfragile

The request names Discord, so Discord comes first: it offers webhook-based message posting 111. Among the alternatives, Ace Data Cloud's Discord integration can send messages to a channel 212, and Railway's Discord integration can read channel lists and the user's profile 313; these are third-party integrations rather than Discord's own webhook route.

1
Discorddiscord.ggverified and signed
Posts a message to a channel through a Discord webhook URL (send_message_webhook) 111; a bot-based send (sendMessageWithBot) and a custom API call are also indexed 11.
Website
for agents: send_message_webhook · sendMessageWithBot · custom_api_call
2
Ace Data Cloud Discord Botacedata.cloudfound in code, not yet checked
Sends a message to a Discord channel with discord_send_message, alongside pin and delete actions 212.
Website
for agents: discord_send_message · discord_pin_message · discord_delete_message
3
Railway Discordrailway.comfound in code, not yet checked
Lists channels in a guild and reads the authenticated user's profile and connections 313; it does not show a plain webhook send.
Website Docs Pricing
for agents: get_guild_channels · get_connections · get_current_user

Sources

1Discord - Group Chat That’s All Fun & Gamesdiscord.com · read 2026-10-29
2Ace Data Cloudplatform.acedata.cloud · read 2026-10-29
3Railway | The all-in-one intelligent cloud providerrailway.com · read 2026-10-29
11Discord (Activepieces): declares "send_message_webhook" (the record we read and signed)unfragile.ai · read 2026-10-24
12MCP Discord Bot Server: declares "discord_send_message" (the record we read)github.com · read 2026-10-24
13discord-mcp: declares "get_guild_channels" (the record we read)github.com · read 2026-10-24

Left out: webhook.co is winding down, because each one's own page says it is retired or discontinued.

For agents: the 10 actions behind this answer

send_message_webhook · Discord (Activepieces) verified and signed
Send Message via Webhook — Post a message to a channel through a Discord webhook URL.
discord_send_message · MCP Discord Bot Server found in code, not yet checked
Send a message to a Discord channel.
get_guild_channels · discord-mcp found in code, not yet checked
Get the list of channels in a guild (requires bot permissions or appropriate OAuth scope)
· Docker Discord website read, tools not yet checked
Run AI agents and containers safely, anywhere. Docker gives builders trusted sandboxes, governance, and a secure supply chain for modern software.
· Smithery Ai Danushkumar Discord V website read, tools not yet checked
Connect agents to thousands of tools and services so they can act with more agency. Auth, credentials, and sessions handled for you.
· Discord Servers website read, tools not yet checked
Find public Discord servers to join and chat, or list your server. Search for the best Discord communities across gaming, anime, music, and more.
getWebhook · Vercel API verified and signed
Get a webhook
Manage notification channels · Pydantic verified and signed
Create and update Slack, Discord, Opsgenie, and webhook notification channels for alerts.
chat_postMessage · Slack Web API verified and signed
Sends a message to a channel.
github_create_discussion_comment · GitHub (Activepieces) verified and signed
Create Discussion Comment — Adds a comment to a repository discussion.

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