Slack Webhook - Getting Invalid_Payload

Question

I am attempting to set up a webhook to Slack, but am getting an Error message of "Invalid_Payload"

I've looked through Stack, Slack, and Github... but cant' find the answer I seek.

"CustomLink" in there for privacy, actual link is begin used.

CODE:

var request = require('request')

var webhook = "https://hooks.slack.com/services/CUSTOMLINK"

var payload={"text":"This is via an integration from Me - It is a test"}

request.post({url: webhook, payload: payload}, function(err, res){
    if(err){console.log(err)}
    if(res){console.log(res.body)}
})

ERROR:

 invalid_payload

score 7 · Answer 1 · answered Jul 11 '18 at 02:50

7

This worked for me

var payload = {"text":"Message to be sent"}
payload = JSON.stringify(payload);

request.post({url: url, body: payload},function(err,data){
    console.log(data.body);
})

answered Jul 11 '18 at 02:50

Kaustav Ganguli

91
1
3

score 6 · Accepted Answer · answered Oct 08 '16 at 00:10

6

var payload= {"text":"This is via an integration from Me - It is a test"}
payload = JSON.stringify(payload)

I had forgot to stringify the JSON I was creating. Stupid Me.

answered Oct 08 '16 at 00:10

KJ Carlson

215
1
2
11

It worked for me by setting the header: `{"Content-type": "application/x-www-form-urlencoded"` – mgalic Jul 12 '18 at 10:04

score 4 · Answer 3 · answered Oct 07 '16 at 21:07

My guess is that you are missing the Content-type: application/json header. Then it doesn't recognize the json you are sending as json correctly.

You could try:

var request = require('request')

var webhook = "https://hooks.slack.com/services/CUSTOMLINK"

var payload={"text":"This is via an integration from Me - It is a test"}

var headers = {"Content-type": "application/json"}

request.post({url: webhook, payload: payload, headers: headers}, function(err, res){
    if(err){console.log(err)}
    if(res){console.log(res.body)}
})

Check the "Send it directly in JSON" here for reference

Tried this with my webhook address, and it didn't help. Still returned the same error: invalid_payload — KJ Carlson, Oct 07 '16 at 23:25

score 1 · Answer 4 · answered Apr 03 '17 at 13:44

1

var request = require('request');
var apiurl = webhookurl;

var payload= {
  username:'myusername',
  text:'test'
}
payload = JSON.stringify(payload);

request.post(
  {
  url:apiurl,
    form:payload
  }, function (err, result, body) {

    if(err) {
      return err;
    } else {

      console.log(body);
    }

  });

answered Apr 03 '17 at 13:44

Alon Carmel

660
1
6
16

If I do that, the characters such as `( ) !` get transformed into `%28 %29 %21` – Sharcoux Jun 06 '18 at 13:52

score 1 · Answer 5 · edited Feb 14 '22 at 16:13

1

Try with postman for sending the post request by using your webhook as URL and under body use raw and use { "text":"hello" } and follow the following image:

postman

or use this curl command:

curl --location --request POST 'https://hooks.slack.com/services/o1GLCDvsanqNDqMHCBQAd7F3' \
--header 'Content-Type: application/json' \
--data-raw '{
    "text": "hello"
}'

edited Feb 14 '22 at 16:13

Tyler2P

2,324
26
22
31

answered Feb 14 '22 at 11:40

Hritik

11
1

Slack Webhook - Getting Invalid_Payload

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