--- title: "Changes to Start Browser Session" method: POST path: "/v1/sessions" --- # Changes to Start Browser Session `POST /v1/sessions` > Every recorded change to this operation, newest first. ## Timeline Changed in 10 of 35 revisions. - **2026-11-06** `9d755f22df0e`: 1 info - **2026-10-16** `b3bfdb98c79e`: 1 warning, 11 info - **2026-04-07** `34bbc48a0e32`: 1 info - **2026-03-20** `c1198ecebd31`: 1 info - **2026-02-25** `ae25b3e0f20d`: 1 info - **2026-02-10** `00b41ac4ada2`: 5 breaking, 147 info - **2026-01-02** `4b12d8cb611b`: 1 info - **2025-10-20** `6a9e96b1b105`: 1 info - **2025-10-19** `55bf5b5cbe75`: 1 info - **2025-10-16** `b7fe7610c0ce`: 1 warning, 8 info ## Changes - **2026-11-06** `9d755f22df0e`: 1 info - added the new optional request property `session/domain_allowlist` - **2026-10-16** `b3bfdb98c79e`: 1 warning, 11 info - removed the request property `browser/cross_origin_support` - added the new optional request property `browser/disable_dialogs` - added the new optional request property `browser/force_popups_as_tabs` - added the new optional request property `browser/pdf_viewer` - added the new optional request property `browser/tracing` - added the new optional request property `browser/volume` - added the new optional request property `browser/web_bot_auth` - added the new optional request property `identity_async_auth` - added the new optional request property `identity_skip_validation` - added the new optional request property `session/live_view/one_time_url` - added the new optional request property `session/tags` - added the new optional request property `session/x402` - **2026-04-07** `34bbc48a0e32`: 1 info - added the non-success response with the status `429` - **2026-03-20** `c1198ecebd31`: 1 info - added the new optional request property `browser/sensitive_data_mask` - **2026-02-25** `ae25b3e0f20d`: 1 info - added the new optional request property `browser/cross_origin_support` - **2026-02-10** `00b41ac4ada2`: 5 breaking, 147 info - request property `session/proxy/oneOf[subschema #1: Anchor Proxy]/country_code` was restricted to a list of enum values - request property `session/proxy/oneOf[subschema #1: Anchor Proxy]/type` was restricted to a list of enum values - removed `#/components/schemas/AnchorProxyCountryCode, #/components/schemas/ResidentialCountryCode, #/components/schemas/MobileCountryCode, #/components/schemas/GovCountryCode` from the `session/proxy/oneOf[subschema #1: Anchor Proxy]/country_code` request property `oneOf` list - removed `subschema #1: anchor_residential, subschema #2: anchor_mobile, subschema #3: anchor_gov, subschema #4: anchor_proxy` from the `session/proxy/oneOf[subschema #1: Anchor Proxy]/type` request property `oneOf` list - the `session/proxy/oneOf[subschema #1: Anchor Proxy]/country_code` request property type changed from no type to `string` - the `country_code` request property default value `us` was added - added the new `ad` enum value to the request property `session/proxy/oneOf[subschema #1: Anchor Proxy]/country_code` - added the new `ae` enum value to the request property `session/proxy/oneOf[subschema #1: Anchor Proxy]/country_code` - added the new `af` enum value to the request property `session/proxy/oneOf[subschema #1: Anchor Proxy]/country_code` - added the new `ag` enum value to the request property `session/proxy/oneOf[subschema #1: Anchor Proxy]/country_code` - added the new `al` enum value to the request property `session/proxy/oneOf[subschema #1: Anchor Proxy]/country_code` - added the new `am` enum value to the request property `session/proxy/oneOf[subschema #1: Anchor Proxy]/country_code` - added the new `anchor_proxy` enum value to the request property `session/proxy/oneOf[subschema #1: Anchor Proxy]/type` - added the new `ao` enum value to the request property `session/proxy/oneOf[subschema #1: Anchor Proxy]/country_code` - added the new `ar` enum value to the request property `session/proxy/oneOf[subschema #1: Anchor Proxy]/country_code` - added the new `as` enum value to the request property `session/proxy/oneOf[subschema #1: Anchor Proxy]/country_code` - added the new `at` enum value to the request property `session/proxy/oneOf[subschema #1: Anchor Proxy]/country_code` - added the new `au` enum value to the request property `session/proxy/oneOf[subschema #1: Anchor Proxy]/country_code` - added the new `aw` enum value to the request property `session/proxy/oneOf[subschema #1: Anchor Proxy]/country_code` - added the new `az` enum value to the request property `session/proxy/oneOf[subschema #1: Anchor Proxy]/country_code` - added the new `ba` enum value to the request property `session/proxy/oneOf[subschema #1: Anchor Proxy]/country_code` - added the new `bb` enum value to the request property `session/proxy/oneOf[subschema #1: Anchor Proxy]/country_code` - added the new `be` enum value to the request property `session/proxy/oneOf[subschema #1: Anchor Proxy]/country_code` - added the new `bf` enum value to the request property `session/proxy/oneOf[subschema #1: Anchor Proxy]/country_code` - added the new `bg` enum value to the request property `session/proxy/oneOf[subschema #1: Anchor Proxy]/country_code` - added the new `bh` enum value to the request property `session/proxy/oneOf[subschema #1: Anchor Proxy]/country_code` - added the new `bj` enum value to the request property `session/proxy/oneOf[subschema #1: Anchor Proxy]/country_code` - added the new `bm` enum value to the request property `session/proxy/oneOf[subschema #1: Anchor Proxy]/country_code` - added the new `bo` enum value to the request property `session/proxy/oneOf[subschema #1: Anchor Proxy]/country_code` - added the new `br` enum value to the request property `session/proxy/oneOf[subschema #1: Anchor Proxy]/country_code` - added the new `bs` enum value to the request property `session/proxy/oneOf[subschema #1: Anchor Proxy]/country_code` - added the new `by` enum value to the request property `session/proxy/oneOf[subschema #1: Anchor Proxy]/country_code` - added the new `bz` enum value to the request property `session/proxy/oneOf[subschema #1: Anchor Proxy]/country_code` - added the new `ca` enum value to the request property `session/proxy/oneOf[subschema #1: Anchor Proxy]/country_code` - added the new `cg` enum value to the request property `session/proxy/oneOf[subschema #1: Anchor Proxy]/country_code` - added the new `ch` enum value to the request property `session/proxy/oneOf[subschema #1: Anchor Proxy]/country_code` - added the new `ci` enum value to the request property `session/proxy/oneOf[subschema #1: Anchor Proxy]/country_code` - added the new `cl` enum value to the request property `session/proxy/oneOf[subschema #1: Anchor Proxy]/country_code` - added the new `cm` enum value to the request property `session/proxy/oneOf[subschema #1: Anchor Proxy]/country_code` - added the new `co` enum value to the request property `session/proxy/oneOf[subschema #1: Anchor Proxy]/country_code` - …112 more - **2026-01-02** `4b12d8cb611b`: 1 info - added the new optional request property `identities` - **2025-10-20** `6a9e96b1b105`: 1 info - added the new optional request property `browser/extra_stealth` - **2025-10-19** `55bf5b5cbe75`: 1 info - added the new optional request property `integrations` - **2025-10-16** `b7fe7610c0ce`: 1 warning, 8 info - removed the request property `browser/profile/reset_preferences` - the `` request property default value `us` was added - the `` request property default value `us` was added - the `` request property default value `us` was added - the `` request property default value `us` was added - the `active` request property default value `false` was removed - the `active` request property default value `true` was removed - the `type` request property default value `anchor_proxy` was removed - the `type` request property default value `custom` was removed --- [Operation](https://skmtc.dev/anchorbrowser/apis/anchorbrowser-api/docs/v1/sessions/post.md) - [API](https://skmtc.dev/anchorbrowser/apis/anchorbrowser-api.md) - [Page](https://skmtc.dev/anchorbrowser/apis/anchorbrowser-api/changes/v1/sessions/post)