Email teammates their email signature

POST/v1/event/{eventId}/sharing/signatures/send

US Region: https://public-api.sessionboard.com · EU Region: https://public-api-eu.sessionboard.com

Puts these organization members on the team (if they are not on it) and emails each one a link to a page where they copy their signature into their email client. Refused once the webinar has started.

From an AI assistant (an MCP or OAuth connection) this does not send: it answers 202 with status: needs_approval and a link, a person approves it in Sessionboard, and it then sends as them. Do not call again for the same request. Requires write:marketing.

Request example

cURL

curl --request POST \
  --url 'https://public-api.sessionboard.com/v1/event/{eventId}/sharing/signatures/send' \
  --header 'x-access-token: <api-token>' \
  --header 'Content-Type: application/json' \
  --data '{
  "user_ids": [
    1042
  ]
}'

JavaScript

const response = await fetch('https://public-api.sessionboard.com/v1/event/{eventId}/sharing/signatures/send', {
  method: 'POST',
  headers: {
    "x-access-token": "<api-token>",
    "Content-Type": "application/json"
  },
  body: JSON.stringify({
    "user_ids": [
      1042
    ]
  }),
});

const data = await response.json();
console.log(data);

Python

import requests

response = requests.request(
    "POST",
    "https://public-api.sessionboard.com/v1/event/{eventId}/sharing/signatures/send",
    headers={
        "x-access-token": "<api-token>",
        "Content-Type": "application/json"
    },
    json={
        "user_ids": [
            1042
        ]
    },
)

print(response.json())

PHP

<?php

$curl = curl_init();

curl_setopt_array($curl, [
    CURLOPT_URL => "https://public-api.sessionboard.com/v1/event/{eventId}/sharing/signatures/send",
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_CUSTOMREQUEST => "POST",
    CURLOPT_POSTFIELDS => '{
  "user_ids": [
    1042
  ]
}',
    CURLOPT_HTTPHEADER => [
        "x-access-token: <api-token>",
        "Content-Type: application/json",
    ],
]);

$response = curl_exec($curl);
curl_close($curl);

echo $response;

Go

package main

import (
  "fmt"
  "io"
  "net/http"
  "strings"
)

func main() {
  req, _ := http.NewRequest("POST", "https://public-api.sessionboard.com/v1/event/{eventId}/sharing/signatures/send", strings.NewReader(`{
  "user_ids": [
    1042
  ]
}`))
  req.Header.Add("x-access-token", "<api-token>")
  req.Header.Add("Content-Type", "application/json")

  res, _ := http.DefaultClient.Do(req)
  defer res.Body.Close()
  body, _ := io.ReadAll(res.Body)

  fmt.Println(string(body))
}

Java

HttpRequest request = HttpRequest.newBuilder()
    .uri(URI.create("https://public-api.sessionboard.com/v1/event/{eventId}/sharing/signatures/send"))
    .header("x-access-token", "<api-token>")
    .header("Content-Type", "application/json")
    .method("POST", HttpRequest.BodyPublishers.ofString("{\n  \"user_ids\": [\n    1042\n  ]\n}"))
    .build();

HttpResponse<String> response = HttpClient.newHttpClient()
    .send(request, HttpResponse.BodyHandlers.ofString());

System.out.println(response.body());

Try it

RegionUS Region — https://public-api.sessionboard.comEU Region — https://public-api-eu.sessionboard.com

Authorization

Send asAPI token (x-access-token)OAuth access token (Bearer)

Token

Your token stays in this page. It is sent only to the region above and is never saved; it is gone when you leave or reload the page.

Path parameters

eventId*

Body application/json

{ "user_ids": [ 1042 ] }

POST

Send request

Authorizations

• x-access-tokenstringheader

  Organization API token. Generate from Organization Settings → API Tokens.

• AuthorizationBearer <token>headeror

  OAuth 2.1 access token. Obtained via the OAuth PKCE flow at /oauth/token.

Send one of these. See Authentication.

Path parameters

• eventIdintegerpathrequired

  The webinar's event id.

Request body

application/jsonrequired

• user_idsinteger[]required

  Organization members' user ids.

  Min items

  1

  Max items

  50

Example

{
  "user_ids": [
    1042
  ]
}

Responses

200application/json

Sent.

• successboolean
• payloadobject
  Show child attributes

  • sentinteger
  • failedobject[]
    Show child attributes

    • recipientstring
    • reasonstring
  • stateSharingSignatures
    Show child attributes

    • generatedboolean
    • generated_atstring<date-time> | null
    • staleboolean
    • startedboolean
    • starts_atstring<date-time> | null
    • timezonestring | null
    • registration_urlstring | null
    • widthinteger
    • heightinteger
    • banner_urlstring | null

      Stable banner URL; "Save your seat" until the start, "Watch the recording" after.

    • bannersobject
      Show child attributes

      • livestring | null
      • on_demandstring | null
    • variantsobject[]
      Show child attributes

      • idstring

        Allowed values

        "banner", "line", "text"

      • namestring
      • htmlstring
      • textstring
    • variants_availableobject[]
      Show child attributes

      • idstring
      • namestring
    • teamobject[]
      Show child attributes

      • idstring<uuid>
      • user_idinteger
      • namestring
      • emailstring
      • share_urlstring
      • emailed_atstring<date-time> | null
      • opened_atstring<date-time> | null
      • copied_atstring<date-time> | null
      • clicksinteger
      • registrationsinteger

202application/json

Waiting for a person's OK in Sessionboard; nothing was sent.

• successboolean
• payloadobject
  Show child attributes

  • statusstring

    Allowed values

    "needs_approval"

  • approval_idstring
  • urlstring
  • messagestring

400

user_ids missing, empty or longer than 50.

403

• SCOPE_REQUIRED: the token lacks read:events (reads) or write:marketing (writes).
• EVENT_NOT_ALLOWED: the event is outside the token's event allow-list.
• Otherwise the token's user cannot read (or edit) sharing on this webinar.

409

Not a webinar, or the webinar has started.

429

Too many sends; wait before retrying.

Response examples

200

{
  "success": true,
  "payload": {
    "sent": 123,
    "failed": [
      {
        "recipient": "<string>",
        "reason": "<string>"
      }
    ],
    "state": {
      "generated": true,
      "generated_at": "2026-01-15T09:30:00Z",
      "stale": true,
      "started": true,
      "starts_at": "2026-01-15T09:30:00Z",
      "timezone": "<string>",
      "registration_url": "<string>",
      "width": 123,
      "height": 123,
      "banner_url": "<string>",
      "banners": {
        "live": "<string>",
        "on_demand": "<string>"
      },
      "variants": [
        {
          "id": "banner",
          "name": "<string>",
          "html": "<string>",
          "text": "<string>"
        }
      ],
      "variants_available": [
        {
          "id": "<string>",
          "name": "<string>"
        }
      ],
      "team": [
        {
          "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
          "user_id": 123,
          "name": "<string>",
          "email": "<string>",
          "share_url": "<string>",
          "emailed_at": "2026-01-15T09:30:00Z",
          "opened_at": "2026-01-15T09:30:00Z",
          "copied_at": "2026-01-15T09:30:00Z",
          "clicks": 123,
          "registrations": 123
        }
      ]
    }
  }
}

202

{
  "success": true,
  "payload": {
    "status": "needs_approval",
    "approval_id": "<string>",
    "url": "<string>",
    "message": "<string>"
  }
}