kernel

name

kernel

description

Kernel is a serverless browser automation and web agent platform that enables developers to deploy, scale, and run headless or full-browser tasks as APIs without managing infrastructure, offering parallel execution, session persistence, real-time debugging, and usage-based pricing. Read and write Kernel data through One: browsers, authconnections, browserpools, credentialproviders, credentials, invocations and more, 112 actions with real parameter documentation. Use whenever the user asks to look something up in Kernel, create or update a record there, or build code against the Kernel API.

Kernel through One

Kernel is a serverless browser automation and web agent platform that enables developers to deploy, scale, and run headless or full-browser tasks as APIs without managing infrastructure, offering parallel execution, session persistence, real-time debugging, and usage-based pricing.

One exposes Kernel through four MCP tools. The table below carries real action ids from One's knowledge base, so for a common operation you can skip search and go straight to reading the action's parameters.

How to run an action

1. Find the action in the table below, or call search_one_platform_actions with platform kernel if it is not listed.
2. Call get_one_action_knowledge with the action id. Do this every time, including for actions in this table. The table gives you the id, not the parameters.
3. Call execute_one_action with parameters copied from that knowledge.

Never guess a parameter name, a body field, or an enum value. The knowledge has the real schema, and a guessed field is either a 400 or a silent write of the wrong thing.

Before you start

Call list_one_integrations once and confirm Kernel is connected. If it is missing, the user has not connected it: say so and point them at https://app.withone.ai rather than reaching for raw HTTP.

Each connection carries an access field. If it reports {"policy": "methods", "methods": ["GET"]} the agent is read-only here, so plan a read-only answer instead of attempting a write that will be refused.

Before a write

Creates, updates, deletes and sends land on a real Kernel account and cannot be recalled. State the action and the specific target in one line before the first write in a task, and let the user stop you. Reads need no confirmation.

Actions

Browsers

Action	Method	Path	Action id
Download a Browser Session Directory as a ZIP Archive	GET	/browsers/{{id}}/fs/download_dir_zip	conn_mod_def::GJ4tAzjrq8w::2nfAviSJTcGAMBdevhIS5Q
Get a Browser Session’s Details	GET	/browsers/{{id}}	conn_mod_def::GJ4tCHo6OGg::lL2SSIgOSfmI7s0A6iGDSw
List Browser Sessions	GET	/browsers	conn_mod_def::GJ4tCJfyu9Y::jnKv_I4oQS-iM_kMiR5DsA
Stream a Browser Process’s Stdout	GET	/browsers/{{id}}/process/{{processId}}/stdout/stream	conn_mod_def::GJ4tBkFNtyw::39FSFdqXSkmBAuhtR-KY-Q
Click Mouse in a Browser Session	POST	/browsers/{{id}}/computer/click_mouse	conn_mod_def::GJ4tAmpXkWM::l8DWToomTXer2Zq8EBeTrg
Create a Browser Session	POST	/browsers	conn_mod_def::GJ4tB65TNaM::yV5IE-gERVCtkBiD2Vjnfw
Delete a Browser Session by ID	DELETE	/browsers/{{id}}	conn_mod_def::GJ4tCAbDYF0::u4AebMEcSzqG9ZpWdcahpw
Delete a Persistent Browser Session (Deprecated)	DELETE	/browsers	conn_mod_def::GJ4tB5PNbYg::YhSsD4D8S7GNE5cJY1vxpg
Drag Mouse in a Browser Session	POST	/browsers/{{id}}/computer/drag_mouse	conn_mod_def::GJ4tAfeg_Kg::SjX0ckaISlOOh90z2G4g0Q
Execute a Browser Session Command (Synchronous)	POST	/browsers/{{id}}/process/exec	conn_mod_def::GJ4tBjnG6h0::_7-Eze0ARgGb65PXqwPwjw
Execute a Browser Session’s Batch Computer Actions	POST	/browsers/{{id}}/computer/batch	conn_mod_def::GJ4tB5nySlo::jJXizvNdTDWxw6Q-KNIrWg

12 more Browsers actions are available through search.

AuthConnections

Action	Method	Path	Action id
Get an Auth Connection by ID	GET	/auth/connections/{{id}}	conn_mod_def::GJ4tDNkRmDU::SnI8JkRMTMqBYIe-YfoEGg
List Auth Connections	GET	/auth/connections	conn_mod_def::GJ4tDQJjgX4::DvQRmw07RnyzRqptzPpplA
Stream an Auth Connection’s Login Flow Events	GET	/auth/connections/{{id}}/events	conn_mod_def::GJ4tDXGzeLo::5qBf_MJZQomaEMYmasIPDw
Create an Auth Connection	POST	/auth/connections	conn_mod_def::GJ4tDApsxzY::goBZ6CE3Qxqh1W4sQV51Yw
Delete an Auth Connection	DELETE	/auth/connections/{{id}}	conn_mod_def::GJ4tDOUXda8::MpSAjLgSTDi-NhQZHZDJ0A
Exchange an Auth Connection Handoff Code for a JWT	POST	/auth/connections/{{id}}/exchange	conn_mod_def::GJ4tDNSJZT0::ibjOaojDRHKdVyBWwcCRtw
Start a Login Flow for an Auth Connection	POST	/auth/connections/{{id}}/login	conn_mod_def::GJ4tDOCrYJY::VNExYA2OSzmmMiCXjJoRNw
Submit Auth Connection Field Values	POST	/auth/connections/{{id}}/submit	conn_mod_def::GJ4tDXS0fL0::AOkU0IpZRsmj58JsTuKqQg

BrowserPools

Action	Method	Path	Action id
Get a Browser Pool’s Details	GET	/browser_pools/{{idOrName}}	conn_mod_def::GJ4tBYYPuVY::FDzlpVqeTYm-v5AogxJyyw
List Browser Pools	GET	/browser_pools	conn_mod_def::GJ4tBYnkBGU::MVkYwMVGROODsvifX2g_qA
Acquire a Browser from a Browser Pool	POST	/browser_pools/{{idOrName}}/acquire	conn_mod_def::GJ4tBP6Y3jY::ZX7h8c-kQFaYWjnpSM3FYQ
Create a Browser Pool	POST	/browser_pools	conn_mod_def::GJ4tBQB43Y4::P7hw4qaORmq812e2hhePXg
Delete a Browser Pool	DELETE	/browser_pools/{{idOrName}}	conn_mod_def::GJ4tBP6zz9A::dqmrkSVQRvSLVMtKWaDKrw
Flush a Browser Pool’s Idle Browsers	POST	/browser_pools/{{idOrName}}/flush	conn_mod_def::GJ4tBRcio_g::hUeSq9SpSuSB9kqYeMzFLQ
Release a Browser Pool Browser Back to the Pool	POST	/browser_pools/{{idOrName}}/release	conn_mod_def::GJ4tBcNvLFE::SGTq5yI3ScOgnVLeBlTKcA
Update a Browser Pool by ID or Name	PATCH	/browser_pools/{{idOrName}}	conn_mod_def::GJ4tBZwWpsI::gJj4lfpGQTmK8dHtG78xKw

CredentialProviders

Action	Method	Path	Action id
Get a Credential Provider by ID	GET	/org/credential_providers/{{id}}	conn_mod_def::GJ4tCT-FOIk::rfVjBlqaQG6oLYXXTsABmA
List an Organization’s Credential Providers	GET	/org/credential_providers	conn_mod_def::GJ4tCQOTSe0::FHD_1KOZQUOg19BK4lfp8Q
Create an Organization Credential Provider	POST	/org/credential_providers	conn_mod_def::GJ4tCIUryyU::W8DAe-5aSJ6f59kvkPaorA
Delete an Organization Credential Provider	DELETE	/org/credential_providers/{{id}}	conn_mod_def::GJ4tCRTy9xg::7ciNI8fuSKa4N2-UWM2Abg
Test an Organization Credential Provider Connection	POST	/org/credential_providers/{{id}}/test	conn_mod_def::GJ4tCQ5MY2k::NXdmJOdTRSKK15uKBAfdqA
Update a Credential Provider	PATCH	/org/credential_providers/{{id}}	conn_mod_def::GJ4tCatz-4U::T5pE4RCLSI2wAlWz0PAcJg

Credentials

Action	Method	Path	Action id
Generate a Credential’s TOTP Code	GET	/credentials/{{idOrName}}/totp-code	conn_mod_def::GJ4tCbCRbas::gi9qhJ54Sa6qqJphGWn3mw
Get a Credential by ID or Name	GET	/credentials/{{idOrName}}	conn_mod_def::GJ4tCa4RKuc::ObzGhcZ2ThCwtpSPSY40wA
List Credentials	GET	/credentials	conn_mod_def::GJ4tCmGLX24::f5Xlko38R-GIftNhnjlBig
Create a Credential	POST	/credentials	conn_mod_def::GJ4tCbNUOmw::V9K33gZkTxWw4cxlIRv_iA
Delete a Credential by ID or Name	DELETE	/credentials/{{idOrName}}	conn_mod_def::GJ4tCd0goB0::8qwHROxwRWWCFySnnzjDCg
Update a Credential by ID or Name	PATCH	/credentials/{{idOrName}}	conn_mod_def::GJ4tCmSNivI::tzz--yH-SvybiviaTi_M1Q

Invocations

Action	Method	Path	Action id
Get an Invocation’s Details	GET	/invocations/{{id}}	conn_mod_def::GJ4tC1CN5dU::8JzCZwUrSHC7b19B_5QX9A
List Invocations	GET	/invocations	conn_mod_def::GJ4tDCJDfg4::IlDQNjhyS8mD0qPBYLhEyA
Stream an Invocation’s Events	GET	/invocations/{{id}}/events	conn_mod_def::GJ4tDGCCgtA::P3WezkzbQgaXq5mLkleLog
Delete an Invocation’s Browser Sessions	DELETE	/invocations/{{id}}/browsers	conn_mod_def::GJ4tC1L2MiU::1yLCv1_URbOCdPX_0rey4A
Invoke an Action	POST	/invocations	conn_mod_def::GJ4tC07F9MI::YiwoOSUyRteud9gTSIrApw
Update an Invocation by ID	PATCH	/invocations/{{id}}	conn_mod_def::GJ4tDD8s0zo::HAS165ucTxqcZ-84a4Rheg

Deployments

Action	Method	Path	Action id
Get Deployment Details	GET	/deployments/{{id}}	conn_mod_def::GJ4tClEiMVw::h2mldCQeRiWugzpCLjVtCw
List Deployments	GET	/deployments	conn_mod_def::GJ4tCuM3A5I::klcj7155RTW1CxaD5P0H2g
Stream a Deployment’s Events	GET	/deployments/{{id}}/events	conn_mod_def::GJ4tCtf8Dgw::_GkfzbXgQpO1Tl6g6qRB_g
Create a Deployment	POST	/deployments	conn_mod_def::GJ4tCmKYAGU::6UzQPF0OSEmh_yEp75lSWQ
Delete a Deployment	DELETE	/deployments/{{id}}	conn_mod_def::GJ4tCkhuCtg::gWOyKoH9R_eQ8Y1vCS7PTw

Profiles

Action	Method	Path	Action id
Download a Profile Archive (ZIP) by ID or Name	GET	/profiles/{{idOrName}}/download	conn_mod_def::GJ4tDXIKKvo::X_DzjhxqQeapnBVUX7W11A
Get a Profile by ID or Name	GET	/profiles/{{idOrName}}	conn_mod_def::GJ4tDeBcQ7g::SysiMTUqQn6KD9s6L2Hwdw
List Profiles	GET	/profiles	conn_mod_def::GJ4tDek1bXQ::gCxNfUEhQpe57jTVOP4NOg
Create a Profile	POST	/profiles	conn_mod_def::GJ4tDXHChwc::_vge-NC-QEGdk4PFtBPENw
Delete a Profile by ID or Name	DELETE	/profiles/{{idOrName}}	conn_mod_def::GJ4tDXJqDYg::rChhDXvSSvy6mR5etSq_kQ

Proxies

Action	Method	Path	Action id
Get a Proxy by ID	GET	/proxies/{{id}}	conn_mod_def::GJ4tDq-LCzA::70hT9Jt1SUq5N3lNXwo5qA
List Proxies	GET	/proxies	conn_mod_def::GJ4tDqDMkJE::-xQNWs8sSTO_BW4GxMIE1A
Check a Proxy’s Health	POST	/proxies/{{id}}/check	conn_mod_def::GJ4tDhPZxxs::OWDCWVx8S6ukOReHwW4rrw
Create a Proxy	POST	/proxies	conn_mod_def::GJ4tDem1d4Q::LDo3vHv6R-K4URMtI9Ps4A
Delete a Proxy by ID	DELETE	/proxies/{{id}}	conn_mod_def::GJ4tDjnPbtE::MDVbhkFwTE-_Fw5DFI9jEw

Extensions

Action	Method	Path	Action id
Download an Extension Archive (by ID or Name)	GET	/extensions/{{idOrName}}	conn_mod_def::GJ4tCtNq_10::KC2eQ94OR9ON5g3a3r5P3A
Download Unpacked Extension from Chrome Web Store	GET	/extensions/from_chrome_store	conn_mod_def::GJ4tCt-Vufc::LqfOnrmdQAKx9Jwr-pyn5Q
List Browser Extensions	GET	/extensions	conn_mod_def::GJ4tC07fr-Y::Fn_1Y4mKRoiTmggIhpLMwA
Delete an Extension by ID or Name	DELETE	/extensions/{{idOrName}}	conn_mod_def::GJ4tCtV4qPQ::4n-O76P9TJ2X-4nkrXi_Zg
Upload a Browser Extension	POST	/extensions	conn_mod_def::GJ4tC5Rb9Sk::lXbEfiDRQ7qtAJ1DB7xZxA

AuthAgents

Action	Method	Path	Action id
Get an Auth Agent by ID (Deprecated)	GET	/agents/auth/{{id}}	conn_mod_def::GJ4tAWXmqwQ::mRR3C16KTDm-xdHEE2u5yQ
List Auth Agents (Deprecated)	GET	/agents/auth	conn_mod_def::GJ4tAXf5NmE::J92v6uV8TAuPkdgbDzWfjA
Create or Find an Auth Agent	POST	/agents/auth	conn_mod_def::GJ4tAIOScfc::U5VJhWy9QjCzVf3h5J9c_Q
Delete an Auth Agent	DELETE	/agents/auth/{{id}}	conn_mod_def::GJ4tAICoMUc::12AoJ8fSR9-NGvPy1njBhA

BrowserReplays

Action	Method	Path	Action id
Download a Browser Replay Recording	GET	/browsers/{{id}}/replays/{{replayId}}	conn_mod_def::GJ4tBwf4zTI::rzDQmLdeQra9oqcWaPXbEg
Start a Browser Session Replay Recording	POST	/browsers/{{id}}/replays	conn_mod_def::GJ4tBwtGtgE::o9PAkdo8TXi52wID2v7yIQ
Stop a Browser Session Replay Recording	POST	/browsers/{{id}}/replays/{{replayId}}/stop	conn_mod_def::GJ4tBw84VXs::mOqlx5m0RjmQLZe2s7_hXQ

BrowserSessionFiles

Action	Method	Path	Action id
Read a Browser Session File’s Contents	GET	/browsers/{{id}}/fs/read_file	conn_mod_def::GJ4tA7IS8HA::xctMYuSfQXmxZp37r4HWYw
Delete a Browser Session File	PUT	/browsers/{{id}}/fs/delete_file	conn_mod_def::GJ4tAzudqHw::Okr233yNS322IMdnOh-w9A
Write a Browser Session File	PUT	/browsers/{{id}}/fs/write_file	conn_mod_def::GJ4tBIlBpVU::u2LoGTF-RYOey6nM18ae6A

BrowserProcesses

Action	Method	Path	Action id
Spawn an Asynchronous Process in a Browser Session	POST	/browsers/{{id}}/process/spawn	conn_mod_def::GJ4tBb3lFSo::lZ59vdRoQ5eFz3MSUnQghQ
Write to a Browser Process’s STDIN	POST	/browsers/{{id}}/process/{{processId}}/stdin	conn_mod_def::GJ4tBx68sDU::p0gAwvGIT0mKtFFAeOFDtQ

AuthAgentInvocations

Action	Method	Path	Action id
Get an Auth Agent Invocation's Details (Deprecated)	GET	/agents/auth/invocations/{{invocationId}}	conn_mod_def::GJ4tAXaHLas::DXrjppJ7SJepCXbnC2DZRg
Create an Auth Agent Invocation	POST	/agents/auth/invocations	conn_mod_def::GJ4tAIWoIgc::XalyTov-SYu5-oyecO5vZQ

AgentAuthInvocations

Action	Method	Path	Action id
Exchange an Agent Auth Invocation's Handoff Code for a JWT	POST	/agents/auth/invocations/{{invocationId}}/exchange	conn_mod_def::GJ4tALq3yrI::IdN5hVYMRHG4shPsRIev6A

BrowserSessionFilesystem

Action	Method	Path	Action id
Delete a Browser Session Directory	PUT	/browsers/{{id}}/fs/delete_directory	conn_mod_def::GJ4tAzfXDMU::3RAMj7VcR2C4iLmBXy1akg

BrowserSessionFileInfo

Action	Method	Path	Action id
Get a Browser Session File or Directory Info	GET	/browsers/{{id}}/fs/file_info	conn_mod_def::GJ4tAznw0cg::YrbWQfn4RpaybK8ysxMY4g

InvocationBrowsers

Action	Method	Path	Action id
List an Invocation’s Browsers	GET	/invocations/{{id}}/browsers	conn_mod_def::GJ4tDDh17hs::jtfAESytSgawnnzFECc7Rg

BrowserSessionReplays

Action	Method	Path	Action id
List a Browser Session’s Replays	GET	/browsers/{{id}}/replays	conn_mod_def::GJ4tBw0oqfg::T1WCuz6KSemy8Y4o1yHxJw

BrowserExtensions

Action	Method	Path	Action id
Upload Extensions to a Browser Instance	POST	/browsers/{{id}}/extensions	conn_mod_def::GJ4tB8DYe6k::lUM-DfvQRhqsJ1kVJCp0cQ

BrowserSessionDirectoryWatches

Action	Method	Path	Action id
Start a Browser Session Directory Watch	POST	/browsers/{{id}}/fs/watch	conn_mod_def::GJ4tBHv3xrY::rr8g3id2RSiJKWCNTtNgXQ

Apps

Action	Method	Path	Action id
List Apps	GET	/apps	conn_mod_def::GJ4tAPGPiAQ::EqDDVThcSBSmZiOd_CCFow

AuthInvocations

Action	Method	Path	Action id
Submit Field Values for an Auth Invocation (Deprecated)	POST	/agents/auth/invocations/{{invocationId}}/submit	conn_mod_def::GJ4tAWpMAjQ::HlbQ0tWYT1mjRk_JCpIfUw

BrowserScreenshots

Action	Method	Path	Action id
Take a Browser Session Screenshot (Region)	POST	/browsers/{{id}}/computer/screenshot	conn_mod_def::GJ4tAXIdNAk::0TWYxKcYQwehPJt057q11w

This lists 90 of 112 actions. For anything not here, call search_one_platform_actions with platform kernel. The full catalog is at https://www.withone.ai/knowledge/kernel.

When a call fails

The error comes from Kernel, not from One. A 400 or 422 means your parameters do not match the schema, so re-read the knowledge and fix the field. A 401 or 403 means the connection needs re-authorizing, which no retry will fix. A 404 means the id is not on this account. A 429 means slow down. Never retry a write more than once: the first attempt may have landed.

Full catalog: https://www.withone.ai/knowledge/kernel

Integration knowledge by One (withone.ai), licensed under One-Knowledge-1.0. Attribution must be preserved in derivative works.