> ## Documentation Index > Fetch the complete documentation index at: https://nango.dev/docs/llms.txt > Use this file to discover all available pages before exploring further. # List functions > Returns the functions available to an integration, including Nango catalog tools when available. Requires an API key with the `environment:functions:list` scope. > [!NOTE] > > Requires an API key with the `environment:functions:list` scope. [Learn more about API key scopes](https://nango.dev/docs/reference/backend/http-api/api-keys.md#scopes). Returns the functions available to an integration. Catalog tool entries have `source: "tools-catalog"`, `enabled: true`, `id: null`, and `last_deployed: null`. ## OpenAPI ````yaml GET /integrations/{uniqueKey}/functions openapi: 3.1.0 info: title: Nango API description: Nango API specs used to authorize & sync data with external APIs. version: 1.0.0 servers: - url: https://api.nango.dev description: Production server - url: http://localhost:3003 description: Local server security: - bearerAuth: [] externalDocs: url: https://nango.dev/docs/reference/backend/http-api/authentication paths: /integrations/{uniqueKey}/functions: get: summary: List functions description: >- Returns the functions available to an integration, including Nango catalog tools when available. Requires an API key with the `environment:functions:list` scope. parameters: - name: uniqueKey in: path required: true schema: type: string description: The integration ID (unique_key) that you created in Nango. - name: type in: query required: false schema: type: string enum: - sync - on-event - tool description: Filter by function type. - name: search in: query required: false schema: type: string minLength: 1 maxLength: 255 description: Case-insensitive filter on the function name. - name: page in: query required: false schema: type: integer minimum: 0 default: 0 - name: limit in: query required: false schema: type: integer minimum: 1 maximum: 100 default: 20 responses: '200': description: Successfully returned the integration's functions content: application/json: schema: type: object required: - data - pagination properties: data: type: array items: $ref: '#/components/schemas/ListedNangoFunction' pagination: type: object required: - total - page - limit properties: total: type: integer page: type: integer limit: type: integer '400': $ref: '#/components/responses/BadRequest' '401': $ref: '#/components/responses/Unauthorized' '403': $ref: '#/components/responses/Forbidden' '404': $ref: '#/components/responses/NotFound' components: schemas: ListedNangoFunction: description: >- A listed function (sync, deprecated action, on-event, or tool) merged with its availability metadata. oneOf: - allOf: - $ref: '#/components/schemas/NangoSyncFunction' - $ref: '#/components/schemas/FunctionAvailability' - allOf: - $ref: '#/components/schemas/NangoActionFunction' - $ref: '#/components/schemas/FunctionAvailability' - allOf: - $ref: '#/components/schemas/NangoOnEventFunction' - $ref: '#/components/schemas/FunctionAvailability' - allOf: - $ref: '#/components/schemas/NangoToolFunction' - $ref: '#/components/schemas/FunctionAvailability' NangoSyncFunction: type: object required: - name - type - returns - json_schema - runs - auto_start - track_deletes properties: name: type: string description: type: string scopes: type: array items: type: string type: type: string enum: - sync input: type: string returns: type: array items: type: string json_schema: type: - object - 'null' runs: type: - string - 'null' description: Schedule expression, e.g. `every day`. auto_start: type: boolean track_deletes: type: boolean FunctionAvailability: type: object description: >- Availability metadata attached to a listed function. Catalog tools have `id: null`, `last_deployed: null`, `enabled: true`, and `source: tools-catalog`. Deployed functions have an id and a `last_deployed` timestamp. required: - id - enabled - last_deployed - source properties: id: type: - number - 'null' description: >- Deployed function id. `null` for a Nango catalog tool and for a tool, which is identified by its `uuid`. enabled: type: boolean description: >- Whether the function is enabled. Always `true` for deprecated action definitions, including a deployed action whose stored configuration is disabled. Syncs, on-event functions, and tools report the stored value. last_deployed: type: - string - 'null' format: date-time description: ISO-8601 timestamp. `null` for a Nango catalog tool. source: type: string enum: - catalog - standalone - repo - tools-catalog description: >- `tools-catalog` is a Nango catalog tool that has not been deployed. `catalog`, `standalone`, and `repo` are deployed functions. NangoActionFunction: type: object deprecated: true description: >- Deprecated action definition format, also used by some catalog tools. Use createTool for new custom implementations. required: - name - type - returns - json_schema properties: name: type: string description: type: string scopes: type: array items: type: string type: type: string enum: - action input: type: string returns: type: array items: type: string json_schema: type: - object - 'null' NangoOnEventFunction: type: object required: - name - type - event properties: name: type: string description: type: string scopes: type: array items: type: string type: type: string enum: - on-event event: type: string enum: - post-connection-creation - pre-connection-deletion - validate-connection NangoToolFunction: type: object description: An HTTP-triggered function with resolved input and output schemas. required: - name - type - uuid - integration_id - provider - description - input_json_schema - output_json_schema - meta properties: name: type: string type: type: string enum: - tool uuid: type: string format: uuid integration_id: type: string provider: type: string description: type: string input_json_schema: type: - object - 'null' description: >- Input JSON Schema with its referenced definitions, or null when absent or unresolved. output_json_schema: type: - object - 'null' description: >- Output JSON Schema with its referenced definitions, or null when absent or unresolved. meta: type: object required: - tags properties: instructions: type: string required_scopes: description: Provider scopes the tool needs. Absent when unknown. oneOf: - type: object description: Every listed scope is required. required: - all additionalProperties: false properties: all: type: array minItems: 1 items: type: string - type: object description: At least one listed scope is required. required: - any additionalProperties: false properties: any: type: array minItems: 1 items: type: string - type: object description: No scopes are required. required: - none additionalProperties: false properties: none: type: boolean enum: - true tags: type: object additionalProperties: oneOf: - type: string - type: array items: type: string StdError: type: object additionalProperties: false properties: error: type: object additionalProperties: false required: - code properties: code: type: string message: type: string errors: type: array items: type: object responses: BadRequest: description: Bad request content: application/json: schema: $ref: '#/components/schemas/StdError' Unauthorized: description: Unauthorized content: application/json: schema: $ref: '#/components/schemas/StdError' Forbidden: description: Forbidden content: application/json: schema: $ref: '#/components/schemas/StdError' NotFound: description: Not Found content: application/json: schema: $ref: '#/components/schemas/StdError' securitySchemes: bearerAuth: type: http scheme: bearer description: >- An Environment API key from your Nango environment, or an Account API key for account-level endpoints. ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.