# Set "Request Validator" of API Gateway by serverless
**URL:** https://forum.serverless.com/t/set-request-validator-of-api-gateway-by-serverless/7901
**Category:** Serverless Framework
**Tags:** aws, api-gateway
**Created:** [April 5, 2019, 12:01am UTC](https://forum.serverless.com/t/set-request-validator-of-api-gateway-by-serverless/7901 "2019-04-05T00:01:07Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@ikneg](https://forum.serverless.com/u/ikneg)
#### Post date: [April 5, 2019, 12:01am UTC](https://forum.serverless.com/t/set-request-validator-of-api-gateway-by-serverless/7901/1 "2019-04-05T00:01:08Z")
I want to set Request Validator of API Gateway by serverless. I tried two different settings for the Request Validator. But, both methods have failed. I have summarized what I did, so please let me know if there is something wrong.
1. I write the API specification in swagger(OAS3.0). Therefore I tried to realize the setting of Request Validator using OAS extension. After I did `sls deploy` using below `swagger.yaml` and `serverless.yml`, None of the validate patterns described in `x-amazon-apigateway-request-validators` were added to the Request Validator options.
[x-amazon-apigateway-request-validator property - Amazon API Gateway](https://docs.aws.amazon.com/apigateway/latest/developerguide/api-gateway-swagger-extensions-request-validator.html)
[](https://forum.serverless.com/uploads/serverless/original/2X/9/983cb0462782371a470afd361b35344889c0eb15.png)
`swagger.yaml` is below:
```auto
openapi: 3.0.0
info:
description: xxx
version: '0.1'
title: xxx API
x-amazon-apigateway-request-validators:
body-only:
validateRequestBody: true,
validateRequestParameters: false
except-body:
validateRequestBody: false,
validateRequestParameters: true
all:
validateRequestBody: true,
validateRequestParameters: true
tags:
- name: auth
description: xxx
paths:
/login:
post:
tags:
- auth
summary: xxx
description: ''
x-amazon-apigateway-request-validator: all
responses:
'200':
description: success
content:
application/json:
schema:
$ref: '#/components/schemas/AuthResponse'
'400':
description: fail
content:
application/json
'401':
description: fail
content:
application/json
requestBody:
content:
application/json:
schema:
$ref: '#/components/schemas/AuthRequest'
required: true
x-amazon-apigateway-integration:
responses:
default:
statusCode: "200"
uri: "arn:aws:apigateway:ap-northeast-1:lambda:path/2015-03-31/functions/arn:aws:lambda:ap-northeast-1:xxxxxxxxxxxx:function:xxx-api-dev-login/invocations"
passthroughBehavior: "when_no_match"
httpMethod: "POST"
contentHandling: "CONVERT_TO_TEXT"
type: "aws_proxy"
```
My `serverless.yml` is below:
```auto
resources:
Resources:
RestApi :
Type : AWS::ApiGateway::RestApi
Properties :
Body : ${file(./swagger.yaml)}
LoginApiToInvokeLambda:
Type: AWS::Lambda::Permission
DependsOn: LoginLambdaFunction
Properties:
FunctionName: xxx-ext-api-dev-login
Action: lambda:InvokeFunction
Principal: apigateway.amazonaws.com
```
1. I tried to realize the setting of Request Validator using `AWS::ApiGateway::RequestValidator`. After I did `sls deploy` using above `swagger.yaml` and below `serverless.yml`, the `all` described in `RequestValidatorAll` in `severless.yml` were added to the Request Validator options. But the default value of Request Validator was still NONE.
[](https://forum.serverless.com/uploads/serverless/original/2X/c/cacd34c6b9064d8692c6e29b92be1720be0270bd.png)
```auto
resources:
Resources:
RestApi :
Type : AWS::ApiGateway::RestApi
Properties :
Body : ${file(./swagger.yaml)}
LoginApiToInvokeLambda:
Type: AWS::Lambda::Permission
DependsOn: LoginLambdaFunction
Properties:
FunctionName: xxx-ext-api-dev-login
Action: lambda:InvokeFunction
Principal: apigateway.amazonaws.com
RequestValidatorAll:
Type: AWS::ApiGateway::RequestValidator
Properties:
Name: all
RestApiId:
Ref: RestApi
ValidateRequestBody: true
ValidateRequestParameters: true
```
---
### Author:  [@mnowik-ck](https://forum.serverless.com/u/mnowik-ck)
#### Post date: [April 14, 2020, 9:07pm UTC](https://forum.serverless.com/t/set-request-validator-of-api-gateway-by-serverless/7901/2 "2020-04-14T21:07:57Z")
Below code works for me
```
RequestValidator:
Type: AWS::ApiGateway::RequestValidator
Properties:
RestApiId: !Sub "${ServerlessRestApi}"
ValidateRequestParameters: true
```
---
### Author:  [@syedfaisalsaleeem](https://forum.serverless.com/u/syedfaisalsaleeem)
#### Post date: [December 1, 2020, 1:48pm UTC](https://forum.serverless.com/t/set-request-validator-of-api-gateway-by-serverless/7901/3 "2020-12-01T13:48:32Z")
```auto
functions:
hello:
handler: handler.hello
events:
- http:
path: /
method: get
likes:
handler: handler.likes
events:
- http:
path: /likes
method: get
integration: lambda
reqValidatorName: xMyRequestValidator
request:
passThrough: NEVER
parameters:
querystrings:
url: true
template:
application/json: '{ "userid":"$input.params(''userid'')","activityid":"$input.params(''activityid'')"}'
response:
headers:
Content-Type: "'application/json'"
custom:
wsgi:
app: handler.app
pythonBin: python # Some systems with Python3 may require this
packRequirements: false
pythonRequirements:
dockerizePip: non-linux
resources:
Resources:
xMyRequestValidator:
Type: "AWS::ApiGateway::RequestValidator"
Properties:
Name: 'my-req-validator'
RestApiId:
Ref: ApiGatewayRestApi
ValidateRequestBody: true
ValidateRequestParameters: true
```