`oauth.v2.user.access` method

Facts

DescriptionExchanges a temporary OAuth verifier code for a user access token.

Method Access

HTTP
JavaScript
Python
Java

POST https://slack.com/api/oauth.v2.user.access

app.client.oauth.v2.user.access

app.client.oauth_v2_user_access

app.client().oauthV2UserAccess

ScopesNo scopes required

Content types

application/x-www-form-urlencoded

application/json

Rate LimitsSpecial rate limits apply.

Arguments

Optional arguments

client_idstringOptional

Issued when you created your application. If possible, avoid sending client_id and client_secret as parameters in your request and instead supply the Client ID and Client Secret using the HTTP Basic authentication scheme.

Example: 2141029472.691202649728

client_secretstringOptional

Example: e1b9e11dfcd19c1982d5de12921e17e8c

codestringOptional

The code param returned via the OAuth callback.

Example: 4724469134.4644010092847.232b4e6d82c333b475fc30f5f5a341d294feb1a94392c2fd791f7ab7731a443d1a

code_verifierstringOptional

The code_verifier param used to generate the code_challenge originally. Used for PKCE.

Example: secret12345

redirect_uristringOptional

This must match the originally submitted URI (if one was sent).

Example: http://example.com

grant_typestringOptional

The grant_type param as described in the OAuth spec.

Example: authorization_code

refresh_tokenstringOptional

The refresh_token param as described in the OAuth spec.

Example: xoxe-1-abcdefg

Usage info

This method is used to initiate the OAuth flow using just user scopes (no bot scopes). This endpoint should be used in scenarios where:

You only need user tokens, not bot tokens
You're building MCP integrations with desktop IDE clients like Cursor or Claude Code

Response

Successful token request with scopes for a user token.

{
  "ok": true,
  "access_token": "xoxp-123456789...",
  "token_type": "user",
  "id_token": "eyJhbGciOiJSUzI1Ni...",
  "authed_user": {
    "id": "U12345",
    "scope": "openid,email,profile"
  },
  "team": {
    "id": "T012345"
  }
}

Typical error response.

{
  "ok": false,
  "error": "invalid_code"
}

Errors

This table lists the expected errors that this method could return. However, other errors can be returned in the case where the service is down or other unexpected factors affect processing. Callers should always check the value of the ok parameter in the response.

Error

Description

access_denied

Access to a resource specified in the request is denied.

accesslimited

Access to this method is limited on the current network

account_inactive

Authentication token is for a deleted user or workspace when using a bot token.

bad_client_secret

Value passed for client_secret was invalid.

bad_redirect_uri

Value passed for redirect_uri did not match the redirect_uri in the original request.

cannot_install_an_org_installed_app

Returned when the the org-installed app cannot be installed on a workspace.

deprecated_endpoint

The endpoint has been deprecated.

ekm_access_denied

Administrators have suspended the ability to post a message.

enterprise_is_restricted

The method cannot be called from an Enterprise.

fatal_error

The server could not complete your operation(s) without encountering a catastrophic error. It's possible some aspect of the operation succeeded before the error was raised.

internal_error

The server could not complete your operation(s) without encountering an error, likely due to a transient issue on our end. It's possible some aspect of the operation succeeded before the error was raised.

invalid_arg_name

The method was passed an argument whose name falls outside the bounds of accepted or expected values. This includes very long names and names with non-alphanumeric characters other than _. If you get this error, it is typically an indication that you have made a very malformed API call.

invalid_arguments

The method was called with invalid arguments.

invalid_array_arg

The method was passed an array as an argument. Please only input valid strings.

invalid_auth

Some aspect of authentication cannot be validated. Either the provided token is invalid or the request originates from an IP address disallowed from making the request.

invalid_charset

The method was called via a POST request, but the charset specified in the Content-Type header was invalid. Valid charset names are: utf-8 iso-8859-1.

invalid_client_id

Value passed for client_id was invalid.

invalid_code

Value passed for code was invalid.

invalid_form_data

The method was called via a POST request with Content-Type application/x-www-form-urlencoded or multipart/form-data, but the form data was either missing or syntactically invalid.

invalid_grant_type

Value passed for grant_type was invalid.

invalid_post_type

The method was called via a POST request, but the specified Content-Type was invalid. Valid types are: application/json application/x-www-form-urlencoded multipart/form-data text/plain.

invalid_refresh_token

The given refresh token is invalid.

method_deprecated

The method has been deprecated.

missing_post_type

The method was called via a POST request and included a data payload, but the request did not include a Content-Type header.

missing_scope

The token used is not granted the specific scope permissions required to complete this request.

no_permission

The workspace token used in this request does not have the permissions necessary to complete the request. Make sure your app is a member of the conversation it's attempting to post a message to.

no_scopes

Missing scope in the request.

no_user_scopes

Missing user scope in the auth request.

not_allowed_token_type

The token type used in this request is not allowed.

not_authed

No authentication token provided.

not_implemented

Method not yet supported

oauth_authorization_url_mismatch

The OAuth flow was initiated on an incorrect version of the authorization url. The flow must be initiated via /oauth/v2/authorize .

org_login_required

The workspace is undergoing an enterprise migration and will not be available until migration is complete.

preview_feature_not_available

Returned when the API method is not yet available on the team in context.

ratelimited

The request has been ratelimited. Refer to the Retry-After header for when to retry the request.

request_timeout

The method was called via a POST request, but the POST data was either missing or truncated.

service_unavailable

The service is temporarily unavailable

team_access_not_granted

The token used is not granted the specific workspace access required to complete this request.

team_added_to_org

The workspace associated with your request is currently undergoing migration to an Enterprise Organization. Web API and other platform operations will be intermittently unavailable until the transition is complete.

token_expired

Authentication token has expired

token_revoked

Authentication token is for a deleted user or workspace or the app has been removed when using a user token.

two_factor_setup_required

Two factor setup is required.

user_email_unverified

The users email is unverified

Facts​

Arguments​