Authentication - Writesonic Docs

All API requests require an X-API-KEY header with your Writesonic API key.

curl --request POST \
  --url https://api.writesonic.com/v2/geo/business/prompts \
  --header 'Content-Type: application/json' \
  --header 'X-API-KEY: <your-api-key>' \
  --data '{
    "project_id": "your-project-id"
  }'

How to Find Your API Key

Go to app.writesonic.com and sign in with your account.

Open the API Dashboard

Hover over your profile picture in the top-right corner and select API Dashboard from the menu.

Activate the API

Find the activation toggle and switch it on to enable API access.

Reveal your API key

Click the Reveal API Key button. Your key will be displayed — click to copy it.

Never commit your API key to public repositories (GitHub, GitLab, Bitbucket) or store it in client-side code. Use environment variables or a secrets manager.

Base URL

All GEO API endpoints use the following base URL:

https://api.writesonic.com

Authentication Header

Header	Value	Required
`X-API-KEY`	Your Writesonic API key	Yes
`Content-Type`	`application/json`	Yes

Error Responses

Status Code	Meaning
`401`	Missing or invalid API key
`403`	API key valid but insufficient permissions
`422`	Validation error in request body
`429`	Rate limit exceeded

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​How to Find Your API Key

​Base URL

​Authentication Header

​Error Responses

How to Find Your API Key

Base URL

Authentication Header

Error Responses