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Chain hub

Polkadot Data APIs

A Polkadot data API shortlist should include indexed Substrate reads, governance visibility, and ecosystem infrastructure rather than treating Polkadot as a single generic RPC endpoint decision. The official ecosystem and developer materials make it clear that Polkadot is a multi-chain environment where tooling, governance, and interoperability all affect the data-access choice

Claim-safe statuses distinguish Provider Profiles, evaluation-only pages, requested integrations, and available gateway/tooling surfaces without exposing paid procurement, approval, or provider-fetching flows

At a glance

Chain hub summary

Primary public prompt
polkadot data api
Definition
Automation-approved Discovery sources with coverage targets mapped to polkadot, dot.
Sources
7
Capabilities
10
Categories
3
Coverage aliases
polkadot, dot
Last verified
PubFi status
Discovery profile and comparison surface; source pages disclose whether PubFi gateway access is available, requested, or comparison-only.

Official-source citations

Subscan API Primary query
subscan api Source
Subscan API Primary coverage
Substrate accounts, extrinsics, governance, staking, and asset data Source
Subscan API Discovery category
On-chain state and governance Source
Subscan API Auth model
API-key authentication is required for live Subscan API use Source
Subscan API Commercial fact
Free API access is documented with one API key and a 5 req/sec limit; paid-plan pricing is not public in the support article Source
Subscan API PubFi status
PubFi gateway route documentation exists for Subscan; upstream account, auth, and route limits still apply Source
DotLake API Primary query
dotlake api Source
DotLake API Primary coverage
Polkadot, Kusama, Westend, Paseo, parachain, and solo Substrate ecosystem metrics Source
DotLake API Endpoint families
OpenAPI lists account, contract, coretime, governance, reliability, revenue, staking, summary, transaction, treasury, validator, and XCM metrics. Source
DotLake API Auth model
All endpoints require a DotLake API key used as a Bearer token after wallet-based registration. Source
DotLake API Freshness note
The Polkadot forum announcement describes daily updates for the API data coverage. Source
DotLake API Commercial fact
No public price, quota, or rate-limit schedule is listed in the OpenAPI description; users must sign in with a Polkadot wallet to obtain an API key. Source
DotLake API PubFi status
PubFi Discovery tracks DotLake API as a public source profile; PubFi does not expose a production DotLake gateway route in the current gateway readiness catalog. Source
SubSquid Primary coverage
Custom blockchain indexing and query APIs across Substrate, EVM, and other networks Source
SubSquid Fixture coverage
On-chain state coverage for the Polkadot fixture target Source
SubQuery Network Primary coverage
Decentralized indexing and query services for blockchain application data Source
SubQuery Network Fixture coverage
On-chain state coverage for the Polkadot fixture target Source
Polkassembly Primary coverage
Governance discussions, proposals, referenda, and vote context for Polkadot and Kusama communities Source
Polkassembly Fixture coverage
Governance coverage for the Polkadot fixture target Source
OnFinality Primary coverage
Managed RPC, archive node, and infrastructure services for Polkadot and other blockchain networks Source
OnFinality Fixture coverage
RPC infrastructure and on-chain state coverage for the Polkadot fixture target Source
Dwellir API Public docs evidence
Dwellir has public API or documentation evidence available from public sources. Source
Dwellir API PubFi gateway status
Automation-built Provider Profile; PubFi gateway support is not certified.

Editorial overview

For Discovery, Polkadot is a chain hub where the practical decision is often between ready-made indexed products such as Subscan, official aggregated metrics such as DotLake API, and more customizable data infrastructure such as SQD or other indexing frameworks. The ecosystem page already highlights tools like Subscan and governance products in the Polkadot toolset, while DotLake adds a Parity-hosted metrics API for dashboards and research. The hub should guide readers toward concrete workflow fit rather than pretending all Polkadot data products solve the same job.

Start here recommendations

Subscan API

Why start here
A strong first stop when the team needs ready-made indexed reads and governance-aware explorer data across Polkadot and other substrate-based networks.
Best for
Teams prioritizing fast indexed reads

DotLake API

Why start here
Use when the team wants official pre-aggregated Polkadot, Kusama, or Substrate ecosystem metrics through a REST API.
Best for
Official aggregated ecosystem metrics

SubSquid

Why start here
A useful comparison point when the team expects to build custom data pipelines or application-specific query layers on top of Polkadot ecosystem data.
Best for
Teams prioritizing custom indexing control

Chain-specific use cases and ecosystem gaps

Chain-specific use cases

  • Monitoring accounts, extrinsics, and governance activity across Polkadot ecosystem chains
  • Reading official pre-aggregated ecosystem metrics for dashboards, research, and analytics workflows
  • Choosing between ready-made indexed APIs and custom indexing infrastructure for Polkadot products
  • Evaluating ecosystem tooling before building governance, staking, or chain analytics workflows

Ecosystem gaps

  • Provider pages make product capabilities visible faster than they make interchangeability or migration costs visible.
  • Teams still have to distinguish between explorer-style indexed APIs and custom indexing frameworks before a shortlist becomes actionable.

Coverage entries

Coming soonNeeds re-verification

Explorer and indexed Substrate chain API for accounts, extrinsics, governance, staking, and asset data

Provider
Subscan
Page status
Indexable
Agent availability
Needs re-verification
Primary category
Onchain Analytics
Primary chain
Polkadot
On-chain stateGovernance
Indexed onlyProvider Profile

Official Polkadot, Kusama, and Substrate REST API for pre-aggregated ecosystem metrics

Provider
Parity Data
Page status
Indexable
Agent availability
Provider Profile
Primary category
Onchain Analytics
Primary chain
Polkadot
On-chain stateGovernance
Indexed onlyProvider Profile

Indexing and query infrastructure for building custom blockchain data APIs across Substrate, EVM, and other networks

Provider
Subsquid
Page status
Indexable
Agent availability
Provider Profile
Primary category
On Chain State
Primary chain
Polkadot
On-chain state
Indexed onlyProvider Profile

Decentralized indexing and query services for blockchain application data across Polkadot, Ethereum, and other ecosystems

Provider
SubQuery
Page status
Indexable
Agent availability
Provider Profile
Primary category
On Chain State
Primary chain
Polkadot
On-chain state
AvailableProvider Profile

Governance discussion, proposal, referendum, and vote context for Polkadot and Kusama communities

Provider
Polkassembly
Page status
Indexable
Agent availability
Provider Profile
Primary category
Governance
Primary chain
Polkadot
Governance
Coming soonNeeds re-verification

Managed RPC, archive node, and infrastructure services for Polkadot and other blockchain networks

Provider
OnFinality
Page status
Indexable
Agent availability
Needs re-verification
Primary category
Rpc Infra
Primary chain
Polkadot
RPC infrastructureOn-chain state
Coming soonProvider Profile

Dwellir API is an automation-built public Provider Profile for Dwellir: Indexing API. Discovery has public docs evidence, but PubFi does not certify gateway runtime support for this provider

Provider
Dwellir
Page status
Indexable
Agent availability
Provider Profile
Primary category
On Chain State
Primary chain
Ethereum
On-chain stateRPC infrastructureEthereum

Matched fixture targets

Subscan API on-chain state coverage

Requested
Source
subscan
Auth
Api Key
Procurement
Free Requires Auth
Coverage
polkadot
chain_state_recordchain_slug, address_or_entity, record_type, captured_at

Subscan API governance coverage

Requested
Source
subscan
Auth
Api Key
Procurement
Free Requires Auth
Coverage
polkadot
governance_recordchain_slug, proposal_id, status, captured_at

DotLake API on-chain ecosystem metrics coverage

Requested
Auth
Api Key
Procurement
Free Requires Auth
Coverage
polkadot, kusama, substrate
chain_metric_timeseriesrelay_chain, chain, metric_name, date_or_period, captured_at

DotLake API governance metrics coverage

Requested
Auth
Api Key
Procurement
Free Requires Auth
Coverage
polkadot, kusama, substrate
governance_metric_timeseriesrelay_chain, metric_name, period, value, captured_at

SubSquid on-chain state coverage

Requested
Source
subsquid
Auth
Api Key
Procurement
Free Requires Auth
Coverage
polkadot
chain_state_recordchain_slug, address_or_entity, record_type, captured_at

SubQuery Network on-chain state coverage

Requested
Source
subquery
Auth
Api Key
Procurement
Free Requires Auth
Coverage
polkadot
chain_state_recordchain_slug, address_or_entity, record_type, captured_at

Polkassembly governance coverage

Available
Auth
None
Procurement
Public No Approval
Coverage
polkadot
governance_recordchain_slug, proposal_id, status, captured_at

OnFinality RPC infrastructure coverage

Requested
Auth
Api Key
Procurement
Free Requires Auth
Coverage
polkadot
rpc_endpoint_statuschain_slug, endpoint_class, latency_ms, captured_at

OnFinality on-chain state coverage

Requested
Auth
Api Key
Procurement
Free Requires Auth
Coverage
polkadot
chain_state_recordchain_slug, address_or_entity, record_type, captured_at

Dwellir API on chain state evidence

Requested
Source
dwellir
Auth
Api Key
Procurement
Not Procurable
Coverage
ethereum, kusama, polkadot
Ethereum
chain_state_recordchain_slug, address_or_entity, record_type, captured_at