v1

latestOpenAPI 3.1.0CC-BY-NC-SA-4.02026-07-2413803.8 MB

OAuth API

Generate tokens

Exchange the authorization code you received from the Authorize endpoint for an 'access token' API credential, with which you can communicate with the Mollie API on behalf of the consenting merchant.

This endpoint can only be accessed using OAuth client credentials.

🔑 Access with

Basic authentication

post/oauth2/tokens

Headers

Authorizationstring required

The OAuth client ID and client secret as basic access credentials.

Pseudo code: "Basic " + toBase64(client_id + ":" + client_secret)

For example: Basic QWxhZGRpbjpvcGVuIHNlc2FtZQ==

Content-Typestring

This header value must match the type of the request body you send, if there is a request body. For example, if you send the request body as JSON, this header must be set to application/json, and if you send it as form encoded you must set this header to application/x-www-form-urlencoded.

Request body

grant_typestring required

If you wish to exchange your authorization code for an app access token, use grant type authorization_code. If you wish to renew your app access token with your refresh token, use grant type refresh_token.

Possible values: authorization_code refresh_token

codestring

The authorization code you received when creating the authorization. Only use this field when using grant type authorization_code.

refresh_tokenstring

The refresh token you received when creating the authorization. Only use this field when using grant type refresh_token.

redirect_uristring

The URL the merchant is sent back to once the request has been authorized. It must match the URL you set when registering your app.

For consecutive refresh token requests, this parameter is required only if the initial authorization code grant request also contained a redirect_uri.

Example request

{
  "grant_type": "authorization_code",
  "code": "auth_...",
  "refresh_token": "refresh_...",
  "redirect_uri": "https://example.com/redirect"
}

Response

The newly generated access token and refresh token.

access_tokenstring

The app access token, with which you will be able to access the Mollie API on the merchant's behalf.

refresh_tokenstring

The refresh token, with which you will be able to retrieve new app access tokens on this endpoint. The refresh token does not expire.

expires_ininteger

The number of seconds left before the app access token expires. Be sure to renew your app access token before this reaches zero.

token_typestring

As per OAuth standards, the provided app access token can only be used with bearer authentication.

Possible values: bearer

scopestring

A space-separated list of permissions.

Example response

{
  "access_token": "access_...",
  "refresh_token": "refresh_...",
  "expires_in": 3600,
  "token_type": "bearer",
  "scope": "payments.read"
}