fillout

name

fillout

description

Fillout is a form-building platform that provides customizable forms, surveys, and workflow automation with integrations to spreadsheets, databases, and business tools, allowing teams to collect data, route submissions, and embed interactive forms into websites or internal processes. Read and write Fillout data through One: formsubmissions, forms, webhooks and more, 8 actions with real parameter documentation. Use whenever the user asks to look something up in Fillout, create or update a record there, or build code against the Fillout API.

Fillout through One

Fillout is a form-building platform that provides customizable forms, surveys, and workflow automation with integrations to spreadsheets, databases, and business tools, allowing teams to collect data, route submissions, and embed interactive forms into websites or internal processes.

One exposes Fillout 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 fillout 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 Fillout 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 Fillout 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

FormSubmissions

Action	Method	Path	Action id
Get a Form Submission by ID	GET	/v1/api/forms/{{formId}}/submissions/{{submissionId}}	conn_mod_def::GK7A6a-TsxA::EcqDEm71TcyEtct53B0UKA
List a Form's Submissions	GET	/v1/api/forms/{{formId}}/submissions	conn_mod_def::GK7A6KQPGHg::7QjlRkjBTm-ME8pihhyEqA
Create Form Submissions	POST	/v1/api/forms/{{formId}}/submissions	conn_mod_def::GK7A6SlmwvA::s4j4kuVuQaGEO5DxrSLwYA
Delete a Form Submission by ID	DELETE	/v1/api/forms/{{formId}}/submissions/{{submissionId}}	conn_mod_def::GK7A6IFe4Ig::siXASZf2TJmaLVLc7xW7HA

Forms

Action	Method	Path	Action id
Get Form Metadata	GET	/v1/api/forms/{{formId}}	conn_mod_def::GK7A6aTKVOg::bKPbvUslTD-KqPdTEvqZzw
List Forms	GET	/v1/api/forms	conn_mod_def::GK7A6IGPuHA::_lCDuRyuQb6cUbWZolRJQQ

Webhooks

Action	Method	Path	Action id
Create a Webhook for a Form	POST	/v1/api/webhook/create	conn_mod_def::GK7A6JPzAtg::l-3JCDsQSwOpnXuruN5UqA
Remove a Webhook	POST	/v1/api/webhook/delete	conn_mod_def::GK7A6brnbxg::IhHwLHyaThCXk1WBM7ozUQ

When a call fails

The error comes from Fillout, 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/fillout

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