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POST
Send a message (session, template, or interactive)

Authorizations

Authorization
string
header
required

Project API key issued in Settings → API keys. Send it as Authorization: Bearer pk_live_….

Headers

Idempotency-Key
string

Opt-in idempotency key for safe retries of this send.

Maximum string length: 255
X-Paige-Project
string

Target project id, for an MCP OAuth bearer (mcp_at_…) attached to more than one project — get ids from GET /v1/projects. Matched case-insensitively.

Omit it and a READ falls back to the connection's default project; a mutation (any non-GET) on a connection with 2+ projects is rejected with 400 project_required — a write is never defaulted to a guessed project. A connection with exactly one project never needs the header.

Scopes are checked against the SELECTED project only, never a union across the connection.

For a pk_ API key the header selects nothing — one key is one project's context — but it IS validated: omit it and the key's own project is used, send it and it must name that project, otherwise the call is rejected with 403 project_not_attached (a blank value is 400 invalid_project_header, as above).

Body

application/json
type
enum<string>
required
Available options:
text,
image,
video,
audio,
document,
location
conversationId
Minimum string length: 1
phone
string
bsuid
string
content
any

Response

Success.

success
enum<boolean>
required
Available options:
true
data
object
required