• fix(docs): preserve v3 API docs without the unavailable Stainless spec (#2943)latest750Docs64d35bd2026-09-15 22:23

  Change detail

  57 changes across 6 operations, 45 models and 1 section

  AllBreakingWarningInfo

  • POST/v1/sessions/start
    • breaking

      removed subschema #2: ProxyConfigList from the browserbaseSessionCreateParams/proxies request property anyOf list

    • breaking

      added 'propertyNames' constraint to the request property browser/launchOptions/cdpHeaders

    • breaking

      added 'propertyNames' constraint to the request property browserbaseSessionCreateParams/userMetadata

    • info

      added subschema #2 to the browserbaseSessionCreateParams/proxies request property anyOf list

  • POST/v1/sessions/{id}/agentExecute
    • breaking

      added 'propertyNames' constraint to the request property executeOptions/variables

    • info

      added 'propertyNames' constraint to the data/result/metadata response property for the status 200

  • POST/v1/sessions/{id}/act
    • breaking

      added 'propertyNames' constraint to the request property options/variables

  View all changes (57)
• release: 3.22.0 (#344)no API changesDocs9fe68652026-07-22 23:36
• release: 3.21.0 (#342)6Docsd4ffe1e2026-05-29 18:56

  Change detail

  6 changes across 2 operations, 2 models and 1 section

  AllBreakingWarningInfo

  • security
    • info

      the security scheme BrowserbaseApiKey AND BrowserbaseProjectId was added to the API

    • info

      the security scheme BrowserbaseApiKey AND BrowserbaseProjectId AND ModelApiKey was removed from the API

  • Models
    • info

      removed the schema ModelConfigObjectOutput

    • info

      removed the schema ModelConfigOutput

  • POST/v1/sessions/{id}/extract
    • info

      added the new optional request property options/screenshot

  • POST/v1/sessions/{id}/observe
    • info

      added the new optional request property options/ignoreSelectors

• release: 3.20.07Docse8b808d2026-05-07 16:19

  Change detail

  7 changes across 3 operations

  AllBreakingWarningInfo

  • POST/v1/sessions/start
    • info

      added the new optional request property browserbaseSessionCreateParams/browserSettings/captchaImageSelector

    • info

      added the new optional request property browserbaseSessionCreateParams/browserSettings/captchaInputSelector

    • info

      added the new optional request property browserbaseSessionCreateParams/browserSettings/os

    • info

      added the new optional request property browserbaseSessionCreateParams/browserSettings/verified

    • info

      request property browserbaseSessionCreateParams/projectId deprecated

  • POST/v1/sessions/{id}/agentExecute
    • info

      added the new optional request property executeOptions/variables

  • POST/v1/sessions/{id}/extract
    • info

      added the new optional request property options/ignoreSelectors

• release: 3.19.3 (#333)no API changesDocs083244c2026-04-03 19:26
• release: 3.18.0 (#322)no API changesDocsdfc4a7a2026-03-25 22:58
• release: 3.7.0 (#312)16Docs7f7a3aa2026-03-24 00:54

  Change detail

  7 changes across 4 operations

  AllBreakingWarningInfo

  • POST/v1/sessions/{id}/act
    • breaking

      the options/variables/additionalProperties request property type changed from string to no type

    • info

      added VariablePrimitive subschema #2 to the options/variables/additionalProperties request property anyOf list

  • POST/v1/sessions/{id}/agentExecute
    • info

      added the new optional request property executeOptions/toolTimeout

    • info

      added the new optional request property executeOptions/useSearch

    • info

      added the new bedrock enum value to the request property agentConfig/provider

  • POST/v1/sessions/{id}/observe
    • info

      added the new optional request property options/variables

  • POST/v1/sessions/start
    • info

      added the new optional request property browser/launchOptions/cdpHeaders

• release: 3.6.0 (#308)213Docsa30258c2026-02-25 20:17

  Change detail

  15 changes across 2 operations

  AllBreakingWarningInfo

  • GET/v1/sessions/{id}/replay
    • warning

      removed the optional property data/pages/items/actions/items/tokenUsage/cachedInputTokens from the response with the 200 status

    • warning

      removed the optional property data/pages/items/actions/items/tokenUsage/reasoningTokens from the response with the 200 status

    • info

      added the optional property data/clientLanguage to the response with the 200 status

    • info

      added the optional property data/pages/items/actions/items/endTime to the response with the 200 status

    • info

      added the optional property data/pages/items/actions/items/tokenUsage/cost to the response with the 200 status

    • info

      the response property data/pages became required for the status 200

    • info

      the response property data/pages/items/actions became required for the status 200

  View all changes (15)
• release: 3.5.0 (#303)1Docsfd7bffe2026-01-29 19:43
• release: 3.4.8 (#302)7716Docs5954b852026-01-27 23:46
• release: 3.4.2 (#284)no API changesDocs1e51dd82026-01-13 19:17
• Stagehand Canonical Release (#277)Docse8867e12026-01-13 17:23

Revisions go back to the API's first capture.