Skip to main content
Send a template message to multiple Slack destinations

Authorizations

Authorization
string
header
required

LithoBlocks API key obtained from your organization dashboard. The LithoBlocks MCP server also presents a Supabase-issued user session token here on the user's behalf; such a token acts as that user with the scopes their organization role allows.

Headers

Idempotency-Key
string

Any unique string (a UUID is fine). Repeating a request with the same key and body within 24 hours replays the original response with Idempotency-Replayed: true instead of running again; the same key with a different body is a 409. Incomplete and 5xx outcomes are retained for reconciliation beyond 24 hours. Applies only on the documented endpoints. Never automatically change keys to bypass an uncertain outcome.

Required string length: 1 - 255
Example:

"3f7d2c1a-9b4e-4f0a-8c6d-2e1b5a7c9d10"

Body

application/json

Bulk send message request

template_id
string<uuid>
required
data
object
required
destinations
object[]
required
Required array length: 1 - 100 elements

Response

Bulk send results

success
boolean
required
results
object[]
required
total_sent
number
required
total_failed
number
required
remaining_credits
number
warnings
string[]
slack_truncation
object
version_id
string

The template version that was compiled

version_number
number

Its number