generated: '2026-08-25'
method: searched
source: https://wiki.secondlife.com/wiki/Linden_Lab_Official:Registration_API_Error_Codes plus a live
  probe of POST https://api.secondlife.com/get_agent_id on 2026-08-25
format: vendor-specific JSON
rfc9457: false
note: 'Linden Lab publishes no application/problem+json and no OpenAPI, so nothing here is derived from
  a spec — the Registration API catalog below is transcribed from the wiki page that publishes it, and
  the get_agent_id envelope was observed on a live response. The two APIs use different, incompatible
  error shapes: Registration returns a numeric code that the API itself will enumerate for you via its
  get_error_codes capability, while get_agent_id returns a string `error` slug plus a human `message`.
  There is no shared error envelope across the Second Life API surface.'
envelopes:
- api: Second Life Name to Agent ID API
  content_type: application/json
  shape:
    error: string slug
    message: human-readable description
  observed_example: '{"error": "bad_input", "message": "No API key included in header"}'
  observed_status: 400
  method: probed
  source: POST https://api.secondlife.com/get_agent_id (2026-08-25, no api-key header)
- api: Second Life Registration API
  content_type: application/llsd+xml
  shape:
    code: integer
    message: string
  discovery: The live code list is retrievable at runtime from the get_error_codes capability URL returned
    by https://cap.secondlife.com/get_reg_capabilities
  method: searched
  source: https://wiki.secondlife.com/wiki/Linden_Lab_Official:Registration_API_Error_Codes
http_statuses:
- api: Second Life Name to Agent ID API
  status: 400
  meaning: bad_input — malformed body or missing api-key header
  method: probed
- api: Second Life Name to Agent ID API
  status: 403
  meaning: rate limiting exceeded (>2 requests/second)
  method: searched
- api: Second Life Name to Agent ID API
  status: 404
  meaning: user does not exist, or invalid API key
  method: searched
- api: Second Life Name to Agent ID API
  status: 405
  meaning: request method was not POST
  method: probed
- api: Second Life Name to Agent ID API
  status: 500
  meaning: server error
  method: searched
error_code_count: 59
error_codes:
- api: Second Life Registration API
  code: 10
  message: missing required field
  class: request-shape
- api: Second Life Registration API
  code: 11
  message: invalid post
  class: request-shape
- api: Second Life Registration API
  code: 12
  message: unallowed extra field
  class: request-shape
- api: Second Life Registration API
  code: 50
  message: invalid last name id
  class: field-validation
- api: Second Life Registration API
  code: 51
  message: invalid username
  class: field-validation
- api: Second Life Registration API
  code: 52
  message: invalid user
  class: field-validation
- api: Second Life Registration API
  code: 53
  message: invalid start_local_x
  class: field-validation
- api: Second Life Registration API
  code: 54
  message: invalid start_local_y
  class: field-validation
- api: Second Life Registration API
  code: 55
  message: invalid start_local_z
  class: field-validation
- api: Second Life Registration API
  code: 56
  message: invalid start_look_at_x
  class: field-validation
- api: Second Life Registration API
  code: 57
  message: invalid start_look_at_y
  class: field-validation
- api: Second Life Registration API
  code: 58
  message: invalid start_look_at_z
  class: field-validation
- api: Second Life Registration API
  code: 59
  message: invalid agent_id
  class: field-validation
- api: Second Life Registration API
  code: 60
  message: invalid group id
  class: field-validation
- api: Second Life Registration API
  code: 61
  message: invalid experience_id
  class: field-validation
- api: Second Life Registration API
  code: 62
  message: invalid avatar_id
  class: field-validation
- api: Second Life Registration API
  code: 63
  message: invalid start_region_name
  class: field-validation
- api: Second Life Registration API
  code: 64
  message: invalid limited_to_estate
  class: field-validation
- api: Second Life Registration API
  code: 65
  message: invalid url length
  class: field-validation
- api: Second Life Registration API
  code: 66
  message: invalid maximum maturity
  class: field-validation
- api: Second Life Registration API
  code: 67
  message: invalid email address
  class: field-validation
- api: Second Life Registration API
  code: 70
  message: banned username
  class: field-validation
- api: Second Life Registration API
  code: 71
  message: user exists
  class: field-validation
- api: Second Life Registration API
  code: 72
  message: missing orientation island or start location
  class: field-validation
- api: Second Life Registration API
  code: 100
  message: no perm user
  class: permission
- api: Second Life Registration API
  code: 101
  message: no perm last name id
  class: permission
- api: Second Life Registration API
  code: 102
  message: no perm experience
  class: permission
- api: Second Life Registration API
  code: 103
  message: no perm upgrade
  class: permission
- api: Second Life Registration API
  code: 104
  message: no perm start_region_name
  class: permission
- api: Second Life Registration API
  code: 105
  message: no perm limited_to_estate
  class: permission
- api: Second Life Registration API
  code: 106
  message: invalid group perm
  class: permission
- api: Second Life Registration API
  code: 107
  message: timeout perm user
  class: permission
- api: Second Life Registration API
  code: 108
  message: already logged
  class: permission
- api: Second Life Registration API
  code: 109
  message: already activated
  class: permission
- api: Second Life Registration API
  code: 130
  message: group set failed
  class: group-assignment
- api: Second Life Registration API
  code: 131
  message: group set exists
  class: group-assignment
- api: Second Life Registration API
  code: 300
  message: wrong type username
  class: type-error
- api: Second Life Registration API
  code: 301
  message: wrong type last_name_id
  class: type-error
- api: Second Life Registration API
  code: 303
  message: wrong type limited_to_estate
  class: type-error
- api: Second Life Registration API
  code: 304
  message: wrong type start_region_name
  class: type-error
- api: Second Life Registration API
  code: 305
  message: wrong type start_local_x
  class: type-error
- api: Second Life Registration API
  code: 306
  message: wrong type start_local_y
  class: type-error
- api: Second Life Registration API
  code: 307
  message: wrong type start_local_z
  class: type-error
- api: Second Life Registration API
  code: 308
  message: wrong type start_look_at_x
  class: type-error
- api: Second Life Registration API
  code: 309
  message: wrong type start_look_at_y
  class: type-error
- api: Second Life Registration API
  code: 311
  message: wrong type start_look_at_z
  class: type-error
- api: Second Life Registration API
  code: 312
  message: wrong type agent_id
  class: type-error
- api: Second Life Registration API
  code: 313
  message: wrong type avatar_id
  class: type-error
- api: Second Life Registration API
  code: 314
  message: wrong type experience_id
  class: type-error
- api: Second Life Registration API
  code: 315
  message: wrong type success_url
  class: type-error
- api: Second Life Registration API
  code: 316
  message: wrong type error_url
  class: type-error
- api: Second Life Registration API
  code: 317
  message: wrong type first
  class: type-error
- api: Second Life Registration API
  code: 318
  message: wrong type last
  class: type-error
- api: Second Life Registration API
  code: 319
  message: wrong type group_name
  class: type-error
- api: Second Life Registration API
  code: 320
  message: wrong type marketing_emails
  class: type-error
- api: Second Life Registration API
  code: 321
  message: wrong type maximum_maturity
  class: type-error
- api: Second Life Registration API
  code: 500
  message: over registration limit
  class: quota
- api: Second Life Registration API
  code: 600
  message: invalid credentials
  class: authentication
- api: Second Life Registration API
  code: 1500
  message: unhandled exception
  class: server