# \[EventSub WS\] 400 Bad Request - The value specified in the method field is not valid **URL:** \ **Category:** API\ **Created:** [June 21, 2023, 1:20pm UTC](https://discuss.dev.twitch.com/t/eventsub-ws-400-bad-request-the-value-specified-in-the-method-field-is-not-valid/46198 "2023-06-21T13:20:33Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![w\_AI\_fu\_DEV](https://avatars.discourse-cdn.com/v4/letter/w/ed8c4c/32.png) [@w\_AI\_fu\_DEV](https://discuss.dev.twitch.com/u/w_AI_fu_DEV)\ **Post date:** [June 21, 2023, 1:20pm UTC](https://discuss.dev.twitch.com/t/eventsub-ws-400-bad-request-the-value-specified-in-the-method-field-is-not-valid/46198/1 "2023-06-21T13:20:33Z")
Hi, I am getting this error when trying to subscribe to any events. Here is the code I am using for the subscription: ```auto function subscribeToEventSub(event_name: string, version: number, condition: any = {}, app_token: string, session_id: string): void { fetch('https://api.twitch.tv/helix/eventsub/subscriptions', { method: 'POST', headers: { "Content-Type": "application/json", "Authorization": "Bearer " + app_token, "Client-Id": "", "type": event_name, "version": version.toString(), "condition": JSON.stringify(condition), // {"broadcaster_user_id": user_id} "transport": JSON.stringify({ "method": "websocket", "session_id": session_id }) } }) ... } ``` `app_token` is obtained using this piece of code: ```auto async function getTwitchAppAccessToken(): Promise { let req = await fetch(`https://id.twitch.tv/oauth2/token` + `?client_id=` + `&client_secret=` + `&grant_type=client_credentials`, { method: 'POST' }); let resp = await req.json(); return resp["access_token"]; // pardon the lack of error checking } ``` It is very likely that my error is linked to this: > [If you use WebSockets to receive events, the request must specify a user access token](https://dev.twitch.tv/docs/api/reference/#create-eventsub-subscription) So I also tried replacing the `Authorization` token with one gotten from the implicit grant flow. Here is the url I am using (I successfully manage to get the asked tokens, no problems here): ```auto `https://id.twitch.tv/oauth2/authorize` + `?client_id=` + `&redirect_uri=http://localhost:3000/callback` + `&response_type=token+id_token` + `&scope=channel:read:subscriptions+moderator:read:followers+bits:read+openid` ``` But with the `Authorization` token set to use the one from the implicit grant flow, I get another error: > The ID in the Client-Id header must match the client ID in the access token. What am I doing wrong ? 😭 ---
**Author:** ![BarryCarlyon](https://d3ovvz0v2ajtpu.cloudfront.net/user_avatar/discuss.dev.twitch.com/barrycarlyon/32/253_2.png) [@BarryCarlyon](https://discuss.dev.twitch.com/u/BarryCarlyon)\ **Post date:** [June 21, 2023, 1:26pm UTC](https://discuss.dev.twitch.com/t/eventsub-ws-400-bad-request-the-value-specified-in-the-method-field-is-not-valid/46198/2 "2023-06-21T13:26:12Z")
Most of your Subscription request is in a header isntead of the body And you have a slew of extra JSON stringify’s Should be more like: ```auto function subscribeToEventSub(event_name: string, version: string, condition: any = {}, app_token: string, session_id: string): void { fetch('https://api.twitch.tv/helix/eventsub/subscriptions', { method: 'POST', headers: { "Content-Type": "application/json", "Authorization": "Bearer " + app_token, "Client-Id": "" }, body: JSON.stringify({ "type": event_name, "version": version, "condition": condition, // {"broadcaster_user_id": user_id} "transport": { "method": "websocket", "session_id": session_id } } }) ``` Also note that `version` in the function call should be typecast to a string so you can handle version `beta` and Twitch hasn’t said they’ll always be numeric in style. You can refer to my code example here which might help you out: [https://barrycarlyon.github.io/twitch\_misc/eventsub/websockets/web/basic/](https://barrycarlyon.github.io/twitch_misc/eventsub/websockets/web/basic/) > [@w\_AI\_fu\_DEV](#): > > `app_token` is obtained using this piece of code: Yeah as you noted, you are using the wrong token type. WebSockets _only_ accepts a user token. > [@w\_AI\_fu\_DEV](#): > > But with the `Authorization` token set to use the one from the implicit grant flow, I get another error: > > > The ID in the Client-Id header must match the client ID in the access token. > > What am I doing wrong ? Sounds like you generated an implict auth token with a different clientID to the one you tried to use in code ---
**Author:** ![w\_AI\_fu\_DEV](https://avatars.discourse-cdn.com/v4/letter/w/ed8c4c/32.png) [@w\_AI\_fu\_DEV](https://discuss.dev.twitch.com/u/w_AI_fu_DEV)\ **Post date:** [June 21, 2023, 1:28pm UTC](https://discuss.dev.twitch.com/t/eventsub-ws-400-bad-request-the-value-specified-in-the-method-field-is-not-valid/46198/3 "2023-06-21T13:28:25Z")
Thank you for the quick answer, will try it out! ---
**Author:** ![w\_AI\_fu\_DEV](https://avatars.discourse-cdn.com/v4/letter/w/ed8c4c/32.png) [@w\_AI\_fu\_DEV](https://discuss.dev.twitch.com/u/w_AI_fu_DEV)\ **Post date:** [June 21, 2023, 1:45pm UTC](https://discuss.dev.twitch.com/t/eventsub-ws-400-bad-request-the-value-specified-in-the-method-field-is-not-valid/46198/4 "2023-06-21T13:45:03Z")
Alright, good news is I am no longuer seeing the “The ID in the Client-Id header must match the client ID in the access token.” error. The bad news is that even after implementing your changes and using a user token, I still get the “The value specified in the method field is not valid” error. Just to be sure, when refering to “user token”, we are refering to the “access\_token” fragment parameter sent to the callback url, correct? ---
**Author:** ![BarryCarlyon](https://d3ovvz0v2ajtpu.cloudfront.net/user_avatar/discuss.dev.twitch.com/barrycarlyon/32/253_2.png) [@BarryCarlyon](https://discuss.dev.twitch.com/u/BarryCarlyon)\ **Post date:** [June 21, 2023, 1:46pm UTC](https://discuss.dev.twitch.com/t/eventsub-ws-400-bad-request-the-value-specified-in-the-method-field-is-not-valid/46198/5 "2023-06-21T13:46:37Z")
> [@w\_AI\_fu\_DEV](#): > > Just to be sure, when refering to “user token”, we are refering to the “access\_token” fragment parameter sent to the callback url, correct? For implict auth yes, the access token is in the `access_token` fragment > [@w\_AI\_fu\_DEV](#): > > The bad news is that even after implementing your changes and using a user token, I still get the “The value specified in the method field is not valid” error. What is you code currently looking like? ---
**Author:** ![w\_AI\_fu\_DEV](https://avatars.discourse-cdn.com/v4/letter/w/ed8c4c/32.png) [@w\_AI\_fu\_DEV](https://discuss.dev.twitch.com/u/w_AI_fu_DEV)\ **Post date:** [June 21, 2023, 1:59pm UTC](https://discuss.dev.twitch.com/t/eventsub-ws-400-bad-request-the-value-specified-in-the-method-field-is-not-valid/46198/6 "2023-06-21T13:59:53Z")
My bad, I forgot to remove the damned JSON.stringify. Everything is working and I am getting an actual response, thank you very much! ---
**Author:** ![system](https://d2opxh93rbxzdn.cloudfront.net/original/2X/0/05909729875cce3b53e59d5561c4d23bb14948fc.png) [@system](https://discuss.dev.twitch.com/u/system)\ **Post date:** [July 21, 2023, 2:00pm UTC](https://discuss.dev.twitch.com/t/eventsub-ws-400-bad-request-the-value-specified-in-the-method-field-is-not-valid/46198/7 "2023-07-21T14:00:51Z")
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