I am trying to access a URL url: 'https://mainnet.smartpy.io/chains/main/blocks/head/context/contracts/KT……

But it throws an error  HttpResponse: Http error response: (503) 503 Service Unavailable

No server is available to handle this request.

at HttpBackend. (/app/node_modules/@taquito/http-utils/dist/taquito-http-utils.umd.js:480:31)

at rejected (/app/node_modules/@taquito/http-utils/dist/taquito-http-utils.umd.js:30:69)

What is this error about and how to solve this ?

2 Answers 2


try another node, there are lists available:


https://mainnet.smartpy.io/ results in a 404 and is not a supported endpoint. You can find a list of community-supported endpoints here: https://tezostaquito.io/docs/rpc_nodes/

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