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Free Online HTTP Proxy Checker

IP address / Host name and Port of a HTTP proxy server
IP/Host name: Port:
It is impossible to receive at present test web page through the set HTTP proxy.
Try other HTTP proxy or repeat in some minutes.
HTTP proxy response
{"errors":[{"message":"This operation has been blocked as a potential Cross-Site Request Forgery (CSRF). Please either specify a 'content-type' header (with a type that is not one of application/x-www-form-urlencoded, multipart/form-data, text/plain) or provide a non-empty value for one of the following headers: x-apollo-operation-name, apollo-require-preflight\n","extensions":{"code":"BAD_REQUEST","stacktrace":["BadRequestError: This operation has been blocked as a potential Cross-Site Request Forgery (CSRF). Please either specify a 'content-type' header (with a type that is not one of application/x-www-form-urlencoded, multipart/form-data, text/plain) or provide a non-empty value for one of the following headers: x-apollo-operation-name, apollo-require-preflight",""," at new GraphQLErrorWithCode (/usr/src/app/node_modules/@apollo/server/src/internalErrorClasses.ts:15:5)"," at new BadRequestError (/usr/src/app/node_modules/@apollo/server/src/internalErrorClasses.ts:116:5)"," at preventCsrf (/usr/src/app/node_modules/@apollo/server/src/preventCsrf.ts:91:9)"," at ApolloServer.executeHTTPGraphQLRequest (/usr/src/app/node_modules/@apollo/server/src/ApolloServer.ts:1048:20)"]}}]}