> For the complete documentation index, see [llms.txt](https://docs.mdintegrations.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.mdintegrations.com/partner-api-reference/partner/general/authorize-a-client-to-access-the-users-account.md).

# Authorize a client to access the user's account

Issues an OAuth2 client-credentials access token for the partner's client\_id and client\_secret, which may be sent in the request body or as an Authorization: Basic header. A previously issued, unexpired token is cached and reused instead of requesting a new one on every call.

```json
{"openapi":"3.1.0","info":{"title":"MD Integrations","version":"1.0.0"},"tags":[{"name":"Partner/General"}],"servers":[{"url":"https://api.mdintegrations.dev/v1","description":"Development"}],"security":[{}],"paths":{"/partner/auth/token":{"post":{"operationId":"v1.partner.auth.token.post","description":"Issues an OAuth2 client-credentials access token for the partner's client_id and\nclient_secret, which may be sent in the request body or as an Authorization: Basic\nheader. A previously issued, unexpired token is cached and reused instead of requesting\na new one on every call.","summary":"Authorize a client to access the user's account","tags":["Partner/General"],"requestBody":{"required":true,"content":{"application/json":{"schema":{"$ref":"#/components/schemas/PostPartnerAuthRequest"}}}},"responses":{"200":{"description":"Returns the decoded issued token;","content":{"application/json":{"schema":{"type":"string"}}}},"401":{"$ref":"#/components/responses/AuthenticationException"},"422":{"$ref":"#/components/responses/ValidationException"}}}}},"components":{"schemas":{"PostPartnerAuthRequest":{"type":"object","properties":{"client_id":{"type":["string","null"],"format":"uuid","description":"Nullable, not required: a client may instead send these as an\n`Authorization: Basic base64(client_id:client_secret)` header, the OAuth2\nRFC's other standard transport - AuthController::resolveClientCredentials()\nfalls back to it, and league/oauth2-server (via Passport) already validates\nwhichever transport is actually used regardless of this exists() check;"},"client_secret":{"type":["string","null"]},"grant_type":{"type":"string","enum":["client_credentials"]},"scope":{"type":"string"}},"required":["grant_type","scope"],"title":"PostPartnerAuthRequest"}},"responses":{"AuthenticationException":{"description":"Unauthenticated","content":{"application/json":{"schema":{"type":"object","properties":{"message":{"type":"string","description":"Error overview."}},"required":["message"]}}}},"ValidationException":{"description":"Validation error","content":{"application/json":{"schema":{"type":"object","properties":{"message":{"type":"string","description":"Errors overview."},"errors":{"type":"object","description":"A detailed description of each field that failed validation.","additionalProperties":{"type":"array","items":{"type":"string"}}}},"required":["message","errors"]}}}}}}}
```


---

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