> ## Documentation Index > Fetch the complete documentation index at: https://ngrok.com/docs/llms.txt > Use this file to discover all available pages before exploring further. > Update the AI Gateway configuration for the authenticated account. Omitted fields preserve their existing stored value. # Update AI Gateway configuration ## OpenAPI ````yaml openapi/ai-gateway.yaml PATCH /gateway-config openapi: 3.0.3 info: title: AI Gateway APIs version: 0.1.0 description: | Control-plane HTTP APIs served by the ai-gateway-control service. servers: - url: https://api.ngrok.ai security: - bearerAuth: [] tags: - name: AI Gateway Access Key Configurations description: Manage reusable access key configurations (scope and routing rules). - name: AI Gateway Access Keys description: Manage ngrok-managed access keys associated with AI Gateway endpoints. - name: AI Gateway Configuration description: >- Manage per-account AI Gateway configuration (timeouts, token caps, metadata). - name: AI Gateway API Keys description: Manage customer-facing AI Gateway API Keys. - name: AI Gateway Credits description: Purchase AI Gateway credits via Stripe Checkout. - name: AI Gateway Providers description: Manage AI Gateway providers and the models they expose. - name: AI Gateway Custom Providers description: Manage custom AI Gateway providers and the models they expose. - name: AI Gateway Provider Keys description: Manage provider keys attached to AI Gateway managed access keys. - name: AI Gateway Usage description: >- Read-only AI Gateway usage events and aggregated usage overview for the authenticated account. paths: /gateway-config: patch: tags: - AI Gateway Configuration summary: Update AI Gateway configuration description: >- Update the AI Gateway configuration for the authenticated account. Omitted fields preserve their existing stored value. operationId: UpdateAIGatewayConfig requestBody: required: true content: application/json: schema: $ref: '#/components/schemas/AIGatewayConfigUpdate' responses: '200': description: The updated AI Gateway configuration. content: application/json: schema: $ref: '#/components/schemas/AIGatewayConfig' default: $ref: '#/components/responses/Error' components: schemas: AIGatewayConfigUpdate: type: object additionalProperties: false properties: totalTimeout: type: string description: >- Total timeout duration for a request through the AI Gateway (Go duration string, e.g. `30s`, `1m`). perRequestTimeout: type: string description: >- Per-request timeout duration for individual upstream requests (Go duration string, e.g. `30s`, `1m`). maxInputTokens: type: integer format: int64 nullable: true description: | Maximum number of input tokens allowed per request. PATCH: omit to preserve, send `null` to clear the cap (no limit), or send a number to set it. Accounts that have not written a value read back the per-account default; once cleared with `null`, GET returns `null` until a new value is written. x-go-type: gatewayconfig.NullableInt64 x-go-type-import: name: gatewayconfig path: go.ngrok.com/svc/ai-gateway-control/gatewayconfig x-go-type-skip-optional-pointer: true maxOutputTokens: type: integer format: int64 nullable: true description: | Maximum number of output tokens allowed per request. PATCH: omit to preserve, send `null` to clear the cap (no limit), or send a number to set it. Accounts that have not written a value read back the per-account default; once cleared with `null`, GET returns `null` until a new value is written. x-go-type: gatewayconfig.NullableInt64 x-go-type-import: name: gatewayconfig path: go.ngrok.com/svc/ai-gateway-control/gatewayconfig x-go-type-skip-optional-pointer: true metadata: type: string maxLength: 4096 nullable: true description: | Arbitrary user-defined metadata for the AI Gateway configuration. PATCH: omit to preserve, send `null` to clear, or send a string to set it. GET returns `null` when no value is stored. x-go-type: gatewayconfig.NullableString x-go-type-import: name: gatewayconfig path: go.ngrok.com/svc/ai-gateway-control/gatewayconfig x-go-type-skip-optional-pointer: true AIGatewayConfig: type: object additionalProperties: false required: - accountId - uri - totalTimeout - perRequestTimeout properties: accountId: type: string description: Unique identifier of the account this configuration belongs to. uri: type: string description: URI of this AI Gateway Configuration API resource. totalTimeout: type: string description: >- Total timeout duration for a request through the AI Gateway (Go duration string, e.g. `30s`, `1m`). perRequestTimeout: type: string description: >- Per-request timeout duration for individual upstream requests (Go duration string, e.g. `30s`, `1m`). maxInputTokens: type: integer format: int64 nullable: true description: | Maximum number of input tokens allowed per request. PATCH: omit to preserve, send `null` to clear the cap (no limit), or send a number to set it. Accounts that have not written a value read back the per-account default; once cleared with `null`, GET returns `null` until a new value is written. x-go-type: gatewayconfig.NullableInt64 x-go-type-import: name: gatewayconfig path: go.ngrok.com/svc/ai-gateway-control/gatewayconfig x-go-type-skip-optional-pointer: true maxOutputTokens: type: integer format: int64 nullable: true description: | Maximum number of output tokens allowed per request. PATCH: omit to preserve, send `null` to clear the cap (no limit), or send a number to set it. Accounts that have not written a value read back the per-account default; once cleared with `null`, GET returns `null` until a new value is written. x-go-type: gatewayconfig.NullableInt64 x-go-type-import: name: gatewayconfig path: go.ngrok.com/svc/ai-gateway-control/gatewayconfig x-go-type-skip-optional-pointer: true metadata: type: string maxLength: 4096 nullable: true description: | Arbitrary user-defined metadata for the AI Gateway configuration. PATCH: omit to preserve, send `null` to clear, or send a string to set it. GET returns `null` when no value is stored. x-go-type: gatewayconfig.NullableString x-go-type-import: name: gatewayconfig path: go.ngrok.com/svc/ai-gateway-control/gatewayconfig x-go-type-skip-optional-pointer: true Error: type: object additionalProperties: false required: - statusCode - msg - details properties: errorCode: type: string description: Stable ngrok error code when available. statusCode: type: integer format: int32 description: HTTP status code for this error. msg: type: string description: Human-readable error message. details: type: object description: Structured error details. additionalProperties: type: string responses: Error: description: API error response. content: application/json: schema: $ref: '#/components/schemas/Error' securitySchemes: bearerAuth: type: http scheme: bearer ````