generated: '2026-09-25'
method: searched
source:
- https://docs.api.market/error-code
- https://docs.api.market/subscription-management-api-documentation
- https://docs.api.market/api.market-usage-api-documentation
format: json
envelope:
  field: message
  note: 'The error-code page says to check the JSON response for a field called message; the Subscription Management
    and Usage API pages show {"error": "..."} instead (e.g. {"error":"invalid_api_key"}).'
problems:
- status: 400
  title: Bad Request
  description: The request was unacceptable, often due to missing a required parameter.
- status: 401
  title: Unauthorized
  description: No valid API key provided.
  code: invalid_api_key
- status: 403
  title: Forbidden
  description: Forbidden (insufficient permissions)
- status: 404
  title: Not Found
  description: The requested resource doesn't exist.
  code: subscription_not_found
- status: 405
  title: Method Not Allowed
  description: Method Not Allowed
- status: 409
  title: Conflict
  description: Conflict (subscription already exists, invalid state transition)
- status: 429
  title: Too many requests
  description: API request limit exceeded. See section Rate Limiting for more info.
  code: rate_limited
  remediation: Rate-limit exceeded. Retry-After header set.
- status: 500
  title: Server Error
  description: We have failed to process your request. (You can contact us anytime)
  code: server_error
billing_note: Only API calls that return "200 OK" status code are charged; Error responses (4xx, 5xx) are NOT charged
  (https://docs.api.market/how-does-api.market-charges-me).