n8n

name

n8n

description

n8n is an open-source workflow automation platform that lets you connect apps and services to automate repetitive tasks, build custom data pipelines, and streamline business processes without writing extensive code. Read and write n8n data through One: workflows, executions, credentials, projects, datatablerows, datatables and more, 59 actions with real parameter documentation. Use whenever the user asks to look something up in n8n, create or update a record there, or build code against the n8n API.

n8n through One

n8n is an open-source workflow automation platform that lets you connect apps and services to automate repetitive tasks, build custom data pipelines, and streamline business processes without writing extensive code.

One exposes n8n 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 n8n 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 n8n 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 n8n 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

Workflows

Action	Method	Path	Action id
List Workflows	GET	/api/v1/workflows	conn_mod_def::GJ5A0vdlNSw::JJxjw-PTTjC2ohlkevWC9A
Retrieve a Workflow	GET	/api/v1/workflows/{{id}}	conn_mod_def::GJ5A0qRuJGk::imLCW9DeTx297_0WRvJOYA
Create a Workflow	POST	/api/v1/workflows	conn_mod_def::GJ5A0h8UYKo::2VDrnFnkTm6RD8lLGe1DLA
Deactivate a Workflow	POST	/api/v1/workflows/{{id}}/deactivate	conn_mod_def::GJ5A0ia8jw8::TJgFbA0WRhyoV4EDybnDdQ
Delete a Workflow	DELETE	/api/v1/workflows/{{id}}	conn_mod_def::GJ5A0pW8dDk::uXEJUlz4SOyy1bNholzz_g
Publish (Activate) a Workflow Version	POST	/api/v1/workflows/{{id}}/activate	conn_mod_def::GJ5A0rsAXMI::ZTEcN_20SDyquJGBAaoWtA
Transfer a Workflow to Another Project	PUT	/api/v1/workflows/{{id}}/transfer	conn_mod_def::GJ5A07yW-q4::hPJAMagWSp6C9UJs9f4h0g
Update a Workflow	PUT	/api/v1/workflows/{{id}}	conn_mod_def::GJ5A03S8_58::Vu2Z02b8SeyVUKgnBNN1xw
Update a Workflow's Tags	PUT	/api/v1/workflows/{{id}}/tags	conn_mod_def::GJ5A02mQamE::WEIq7lDJSP6uW6HlzzItDA

Executions

Action	Method	Path	Action id
List Executions	GET	/api/v1/executions	conn_mod_def::GJ5AzeyQSG8::HwR6CKaERsOExBZvcJ45lA
Retrieve an Execution	GET	/api/v1/executions/{{id}}	conn_mod_def::GJ5Azpw0X-4::ffMU0YWVQCyc0r2BVDTJCg
Delete an Execution	DELETE	/api/v1/executions/{{id}}	conn_mod_def::GJ5AzaLSIF0::evB4O14LTd2q_zuXmwwJWQ
Retry an Execution	POST	/api/v1/executions/{{id}}/retry	conn_mod_def::GJ5Azp-juM0::vjrI3aBwSfOoHRGQBjDuBA
Stop an Execution	POST	/api/v1/executions/{{id}}/stop	conn_mod_def::GJ5AzmhyIRk::4BKJSTkwSHOQv_p4jn0BDQ
Stop Multiple Executions	POST	/api/v1/executions/stop	conn_mod_def::GJ5AzsB8ZkQ::wp5WjUhRSvWaut7ZGZTC_A
Update an Execution’s Tags	PUT	/api/v1/executions/{{id}}/tags	conn_mod_def::GJ5AzmpIFYk::mHe1-5euRp-_vX0dHCbZew

Credentials

Action	Method	Path	Action id
List Credentials	GET	/api/v1/credentials	conn_mod_def::GJ5Ay52weM0::93ODZYbfQwioMypwKTnSnA
Show a Credential Type’s Schema	GET	/api/v1/credentials/schema/{{credentialTypeName}}	conn_mod_def::GJ5Ay6WEFrk::hN2TuO9bR2qe_IGUiAJ-CQ
Create a Credential	POST	/api/v1/credentials	conn_mod_def::GJ5Ay5Xc-pU::nKnLHiBBQsq5NQCT8cP3sQ
Delete a Credential by ID	DELETE	/api/v1/credentials/{{id}}	conn_mod_def::GJ5Ay48gYrI::QOOP30AqT_ybq9WSKPMVKg
Transfer a Credential to Another Project	PUT	/api/v1/credentials/{{id}}/transfer	conn_mod_def::GJ5AzCcHmQk::212XF1GJSZyW6IdWFJ8okg
Update a Credential by ID	PATCH	/api/v1/credentials/{{id}}	conn_mod_def::GJ5AzDEe_GQ::rTE-iUC3QaS3a78bTHqE2w

Projects

Action	Method	Path	Action id
List Projects	GET	/api/v1/projects	conn_mod_def::GJ5Az977woU::WL62c_LnSzOyehKjvNKZ3g
Add Users to a Project	POST	/api/v1/projects/{{projectId}}/users	conn_mod_def::GJ5Az0wjpZw::-IUOOpgnQVK7ajFex5VbFw
Create a Project	POST	/api/v1/projects	conn_mod_def::GJ5Az0PaWDY::hFRAK05eQf2nrxraJ54xyA
Delete a Project	DELETE	/api/v1/projects/{{projectId}}	conn_mod_def::GJ5Az0hD0Ik::-IbiNtJyRQaiRKBiMc72Tw
Remove a User from a Project	DELETE	/api/v1/projects/{{projectId}}/users/{{userId}}	conn_mod_def::GJ5Az0GXsxw::0w8teIQQQz6eeFkAS_2h9A
Update a Project	PUT	/api/v1/projects/{{projectId}}	conn_mod_def::GJ5A0C6kuBY::tyDoq8uGS96lqU3dW3kQ_Q

DataTableRows

Action	Method	Path	Action id
List a Data Table’s Rows	GET	/api/v1/data-tables/{{dataTableId}}/rows	conn_mod_def::GJ5AzSlfF-Y::Fwkul5eFQCa8eI6cE3k1PQ
Delete Rows from a Data Table	DELETE	/api/v1/data-tables/{{dataTableId}}/rows/delete	conn_mod_def::GJ5AzD-uBDk::WDJRc3d2QAeOsKmFt2MgNQ
Insert Rows into a Data Table	POST	/api/v1/data-tables/{{dataTableId}}/rows	conn_mod_def::GJ5AzMybGTI::3VroD0-iQj-Hl1q4b6DqpA
Update Rows in a Data Table	PATCH	/api/v1/data-tables/{{dataTableId}}/rows/update	conn_mod_def::GJ5AzbJqS3I::uarVpNQqRI-NbnlizkYbTA
Upsert a Data Table Row	POST	/api/v1/data-tables/{{dataTableId}}/rows/upsert	conn_mod_def::GJ5AzbDLDYw::f90P2RLdReyDAUqwoxRkkg

DataTables

Action	Method	Path	Action id
Get a Data Table	GET	/api/v1/data-tables/{{dataTableId}}	conn_mod_def::GJ5AzLVj7qc::30iXTXx7T4CbL6SVJG04mA
List Data Tables	GET	/api/v1/data-tables	conn_mod_def::GJ5AzQHWmPI::0X-_yrFhQlqu4wnPNkDR3Q
Create a Data Table	POST	/api/v1/data-tables	conn_mod_def::GJ5AzCyTBAI::HJR_IV_MSL-ZVFUXABZCVw
Delete a Data Table	DELETE	/api/v1/data-tables/{{dataTableId}}	conn_mod_def::GJ5AzCOds1g::Z7_Zs2IRSyiLlKqpdVNjbQ
Update a Data Table	PATCH	/api/v1/data-tables/{{dataTableId}}	conn_mod_def::GJ5AzLcm2kQ::KYgkn15HTQyZ6jEuHv519A

Users

Action	Method	Path	Action id
Get a User by ID or Email	GET	/api/v1/users/{{id}}	conn_mod_def::GJ5A0ZqwBb8::LEhmWFXJT1m3zsosJ_Y3Zg
List Users	GET	/api/v1/users	conn_mod_def::GJ5A0afWOOI::7ptg0PRXSZ68O2Vcp81tNw
Change a User's Global Role	PATCH	/api/v1/users/{{id}}/role	conn_mod_def::GJ5A0KgcwH4::uwdF1_WxRrm6OM-YHZT5lA
Create Multiple Users	POST	/api/v1/users	conn_mod_def::GJ5A0ZWJE_I::9YiEcJPhTtCJ0FLkVsMs1w
Delete a User	DELETE	/api/v1/users/{{id}}	conn_mod_def::GJ5A0ZIVxNo::MD76AYZ5SOizVTVXR9znHQ

Tags

Action	Method	Path	Action id
List Tags	GET	/api/v1/tags	conn_mod_def::GJ5A0K_hCYE::ON6ZlL2TTay1KFwJ2N9V6g
Retrieve a Tag	GET	/api/v1/tags/{{id}}	conn_mod_def::GJ5A0Rw8zr4::U_C3AZNiR4SFY3WuFIIU6A
Create a Tag	POST	/api/v1/tags	conn_mod_def::GJ5Az8m6PGg::RlOdht6HQdOE-wW6hRam-Q
Delete a Tag	DELETE	/api/v1/tags/{{id}}	conn_mod_def::GJ5A0Kf-5zQ::GNEVdKepR4-C04dgxiqviw
Update a Tag	PUT	/api/v1/tags/{{id}}	conn_mod_def::GJ5A0LA6FRA::dAnvEYnwTvilO5TY1QGMmA

Variables

Action	Method	Path	Action id
List Variables	GET	/api/v1/variables	conn_mod_def::GJ5A0iDNXXU::98xwksVNRq6gt7TvguZ_Zg
Create a Variable	POST	/api/v1/variables	conn_mod_def::GJ5A0ZMVB3E::4-j4cjT4SdeQnK0Cf5elFw
Delete a Variable	DELETE	/api/v1/variables/{{id}}	conn_mod_def::GJ5A0hziipQ::DWTtwYpWTj-X6Zj5lUtBOg
Update a Variable	PUT	/api/v1/variables/{{id}}	conn_mod_def::GJ5A0hQMp-k::N8LzV-28TnizsPNkRZgXPA

Audit

Action	Method	Path	Action id
Generate an n8n Instance Security Audit	POST	/api/v1/audit	conn_mod_def::GJ5Ay6joKzY::IDjDt73sQBmv6LtzJVHfkA

SourceControl

Action	Method	Path	Action id
Pull Source Control Changes from Remote Repository	POST	/api/v1/source-control/pull	conn_mod_def::GJ5Az8Sq418::MrXkaQgKRuCLJZIjkzTflQ

ProjectMembers

Action	Method	Path	Action id
List a Project’s Members	GET	/api/v1/projects/{{projectId}}/users	conn_mod_def::GJ5Az-ITwrs::lCG-PkubTja0io-cKFffLA

WorkflowTags

Action	Method	Path	Action id
List a Workflow’s Tags	GET	/api/v1/workflows/{{id}}/tags	conn_mod_def::GJ5A0p19fbE::RFHE5JTKT5-9kPNU95s4rA

WorkflowVersions

Action	Method	Path	Action id
Retrieve a Workflow Version (Workflow History)	GET	/api/v1/workflows/{{id}}/{{versionId}}	conn_mod_def::GJ5A07_v_qU::jrfyGTLNSnSttdr0LURrzQ

ProjectUsers

Action	Method	Path	Action id
Change a User's Role in a Project	PATCH	/api/v1/projects/{{projectId}}/users/{{userId}}	conn_mod_def::GJ5Az0hjI3w::BoON8semRYuwrCFzQs9rGQ

ExecutionTags

Action	Method	Path	Action id
List an Execution’s Tags	GET	/api/v1/executions/{{id}}/tags	conn_mod_def::GJ5AzbCRTL0::i08pFO-KQP2vya1FWzq5RQ

When a call fails

The error comes from n8n, 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/n8n

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