Polkadot

Subscan API

Subscan provides a hosted HTTP API for querying indexed on-chain data across more than 90 Substrate-based networks including Polkadot and Kusama. Endpoints cover blocks, extrinsics, events, accounts, staking, tokens, and parachain data. Each network has a dedicated base URL following the pattern https://{network}.api.subscan.io. All requests require an API key obtained from pro.subscan.io.

GitHub OpenAPI

Documentation

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Documentation
https://support.subscan.io/
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RateLimits
https://raw.githubusercontent.com/api-evangelist/polkadot/refs/heads/main/rate-limits/subscan.yml

Specifications

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OpenAPI
https://raw.githubusercontent.com/api-evangelist/polkadot/refs/heads/main/openapi/subscan-swagger.yaml

Other Resources

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PostmanCollection
https://documenter.getpostman.com/view/1618960/TVCe1oRU
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Plans
https://raw.githubusercontent.com/api-evangelist/polkadot/refs/heads/main/plans/subscan.yml
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FinOps
https://raw.githubusercontent.com/api-evangelist/polkadot/refs/heads/main/finops/subscan.yml

OpenAPI Specification

subscan-swagger.yaml Raw ↑